阅读说明：本技术 一种铁基合金粉末、棱纹型仿生减阻耐磨结构及其制备方法与应用 (Iron-based alloy powder, ribbed bionic resistance-reducing wear-resistant structure, and preparation method and application thereof ) 是由 崔佳鹏 刘建峰 王晨臣 李庆达 王洪涛 高威 马余雷 于 2021-07-27 设计创作，主要内容包括：本发明涉及一种铁基合金粉末、棱纹型仿生减阻耐磨结构及其制备方法与应用,属于农机加工技术领域。为解决现有农机具触土部件耐磨层不易与农机具表面结合的问题,本发明提供了一种铁基合金粉末及采用等离子喷焊方法利用该铁基合金粉末制备棱纹型仿生减阻耐磨结构的方法,所制备的棱纹型仿生减阻耐磨结构的棱纹截面为弧形,将其应用于农机具触土部件表面时两条棱纹的间距为5～12.5mm。本发明铁基合金粉末在等离子喷焊过程中合金体系和基体金属化合物的溶解性得到大幅提高,从而增强了铁基合金粉末与基体的结合力,解决了农机具表面与耐磨层不易结合,易断裂的问题,能够有效提升农机具触土部件表面的耐磨和减阻性能。(The invention relates to an iron-based alloy powder, a ribbed bionic resistance-reducing wear-resistant structure, and a preparation method and application thereof, and belongs to the technical field of agricultural machining. In order to solve the problem that the wear-resistant layer of the existing soil contact part of the agricultural implement is not easy to combine with the surface of the agricultural implement, the invention provides iron-based alloy powder and a method for preparing a ribbed bionic resistance-reducing wear-resistant structure by using the iron-based alloy powder by adopting a plasma spray welding method, wherein the section of a rib of the prepared ribbed bionic resistance-reducing wear-resistant structure is arc, and the distance between two ribs is 5-12.5 mm when the rib is applied to the surface of the soil contact part of the agricultural implement. The iron-based alloy powder has the advantages that the solubility of an alloy system and a matrix metal compound is greatly improved in the plasma spray welding process, so that the binding force of the iron-based alloy powder and a matrix is enhanced, the problems that the surface of an agricultural implement is not easy to bind with a wear-resistant layer and is easy to break are solved, and the wear resistance and the resistance reduction performance of the surface of a soil-contacting part of the agricultural implement can be effectively improved.)

1. An iron-based alloy powder characterized by comprising Fe, Cr, Ni, C, Si, B, La, Ce and Pr in a mass ratio of 56:24:6:4:3:3:2:1: 1.

2. The iron-based alloy powder according to claim 1, wherein the iron-based alloy powder is a powder obtained by mixing and grinding pure metal powders of Fe, Cr, Ni, C, Si, B, La, Ce and Pr, each of which has a purity of more than 99.9%, to a particle size of 45 to 100 μm.

3. A preparation method of a ribbed bionic resistance-reducing wear-resistant structure is characterized in that a ribbed geometric structure on the surface of a bionic scallop is combined, iron-based alloy powder is used as a raw material, and a plasma spray welding method is adopted to carry out spray welding on the surface to be subjected to spray welding according to the size parameters of the ribbed bionic resistance-reducing wear-resistant structure, so that the ribbed bionic resistance-reducing wear-resistant structure is obtained; the iron-based alloy powder is prepared by mixing and grinding pure metal powders of Fe, Cr, Ni, C, Si, B, La, Ce and Pr with the purity of more than 99.9% according to the mass ratio of 56:24:6:4:3:3:2:1:1 until the particle size is 45-100 mu m.

4. The method for preparing the ribbed bionic drag-reducing wear-resistant structure according to claim 3, wherein the surface to be spray-welded is cleaned with alcohol to remove dirt and oil stains on the surface before spray-welding, and then the surface to be spray-welded is ground with 80-mesh, 240-mesh and 400-mesh sandpaper in sequence to remove scale and burrs on the surface until the surface to be spray-welded is ground to have a roughness of Ra0.8-Ra1.6.

5. The preparation method of the ribbed bionic drag-reducing wear-resistant structure according to claim 3 or 4, wherein the iron-based alloy powder is heated at 120 ℃ for 2h and dried for standby application before spray welding.

6. The preparation method of the ribbed bionic drag-reducing wear-resistant structure according to claim 5, wherein in the plasma spray welding method, an input power supply is AC220V, the ionic gas flow is 0.2-0.3L/min, the powder feeding gas flow is 0.2-0.3L/min, the shielding gas flow is 3L/min, all of ionized gas, powder feeding gas and shielding gas are pure argon, the powder feeding amount of the powder feeder is 10-50 g/min, the distance between a welding gun and a surface to be spray welded is 7mm, and the traveling speed of the welding gun is 1.5 mm/s.

7. The ribbed bionic drag-reducing wear-resistant structure prepared by the method for preparing the ribbed bionic drag-reducing wear-resistant structure according to any one of claims 3 to 6, wherein the section of the ribs of the ribbed bionic drag-reducing wear-resistant structure is arc-shaped, the width of the contact surface of the ribs and a substrate is 5mm, and the height of the highest part of the arc-shaped ribs is 1.3 mm.

8. The application of the ribbed bionic drag-reducing wear-resistant structure of claim 7 on the surface of a soil-contacting part of an agricultural implement, wherein the distribution pitch of the ribbed monomers of the ribbed bionic drag-reducing wear-resistant structure on the surface of the soil-contacting part of the agricultural implement is 5-12.5 mm.

9. The application of the ribbed bionic drag-reducing wear-resisting structure of claim 8 on the surface of a soil-contacting part of an agricultural implement, wherein the ribbed monomer distribution pitch of the ribbed bionic drag-reducing wear-resisting structure on the surface of the soil-contacting part of the agricultural implement is 7.5 mm.

10. The use of the ribbed biomimetic drag reducing wear resistant structure according to claim 8 or 9 on a surface of an agricultural implement soil contacting component, wherein the agricultural implement soil contacting component comprises a subsoiler arm.

Technical Field

The invention belongs to the technical field of agricultural machinery processing, and particularly relates to an iron-based alloy powder and a ribbed bionic resistance-reducing wear-resistant structure as well as a preparation method and application thereof.

Background

In modern agricultural production, agricultural machinery is widely used, and the development of agricultural mechanization brings great changes to agricultural production, so that the stability and reliability of agricultural mechanized operation are particularly important. There are many factors that affect the stability and reliability of agricultural machines, with a major problem being that the wear of agricultural machine components during use of the agricultural implement is severe. The investigation shows that the agricultural machinery failure condition caused by agricultural machinery component failure accounts for about 50% every year, wherein the agricultural machinery soil-contacting component has abrasion failure and fracture failure, and accounts for about 80% of the agricultural machinery component failure, so that the problem of how to improve the abrasion resistance of the agricultural machinery soil-contacting component plays a critical role in the development of agricultural mechanization.

The abrasion of the soil-contacting part of the agricultural machine in the soil is mainly abrasive abrasion, and the abrasion of soil-breaking cutters such as ploughshares, harrow blades, subsoilers, furrow openers, blades of rotary cultivators and the like in the parts of the agricultural machine is mainly strong abrasion of hard abrasive particles such as stones, sand grains and the like when the cutting edge cuts into the soil and breaks soil blocks. The following processing methods are available at home and abroad for the wear-resistant processing technology aiming at the wear mechanism of the surface of the soil-contacting part of the agricultural implement. One aspect is additive processing methods, i.e., forming a wear resistant layer on the surface of an agricultural implement, such as: the wear resistance of the soil-contacting part of the agricultural implement can be enhanced by surfacing, cladding, hot spraying and the like. But the main defects are that the surface of the agricultural implement and the wear-resistant layer are not easy to combine, are easy to break, and have complex operation, high cost and the like. On the other hand, the bionic surface treatment technology is used for performing bionic treatment on the surface of a material mainly according to organs and body surface structures with special functions evolved by adapting to the survival of animals and plants in the nature. The bionic surface mainly can enable the surface of the soil-contacting part of the agricultural implement to realize the functions of reducing the adhesion of the soil and reducing the resistance of the soil, thereby increasing the wear resistance of the agricultural implement. However, most of the main processing and forming methods are mechanical processing, chemical processing and the like, and have the defects of complex processing, high cost and the like.

Disclosure of Invention

The invention provides an iron-based alloy powder and ribbed bionic resistance-reducing wear-resistant structure, and a preparation method and application thereof, and aims to solve the problems that a wear-resistant layer of a soil-contacting part of an existing agricultural implement is not easy to combine with the surface of the agricultural implement and is easy to break.

The technical scheme of the invention is as follows:

an iron-based alloy powder comprising Fe, Cr, Ni, C, Si, B, La, Ce and Pr in a mass ratio of 56:24:6:4:3:3:2:1: 1.

Further, the iron-based alloy powder is a powder formed by mixing and grinding pure metal powders of Fe, Cr, Ni, C, Si, B, La, Ce and Pr, the purity of which is more than 99.9%, until the particle size is 45-100 mu m.

A preparation method of a ribbed bionic resistance-reducing wear-resistant structure is characterized in that a ribbed geometric structure on the surface of a bionic scallop is combined, iron-based alloy powder is used as a raw material, and spray welding is carried out on the surface to be subjected to spray welding by a plasma spray welding method according to the size parameters of the ribbed bionic resistance-reducing wear-resistant structure to obtain the ribbed bionic resistance-reducing wear-resistant structure; the iron-based alloy powder is prepared by mixing and grinding pure metal powders of Fe, Cr, Ni, C, Si, B, La, Ce and Pr with the purity of more than 99.9% according to the mass ratio of 56:24:6:4:3:3:2:1:1 until the particle size is 45-100 mu m.

Further, before spray welding, the surface to be spray-welded is wiped by alcohol to remove dirt and oil stains on the surface, then the surface to be spray-welded is ground by 80-mesh, 240-mesh and 400-mesh sandpaper in sequence to remove surface scale and burrs until the surface to be spray-welded is ground to the roughness of Ra0.8-Ra1.6.

Further, the iron-based alloy powder is heated for 2 hours and dried for standby application at 120 ℃ before spray welding.

Further, in the plasma spray welding method, an input power supply is AC220V, the ion gas flow is 0.2-0.3L/min, the powder feeding gas flow is 0.2-0.3L/min, the shielding gas flow is 3L/min, the ionized gas, the powder feeding gas and the shielding gas are all pure argon, the powder feeding amount of the powder feeder is 10-50 g/min, the distance between a welding gun and the surface to be spray welded is 7mm, and the traveling speed of the welding gun is 1.5 mm/s.

The rib-type bionic resistance-reducing wear-resistant structure prepared by the preparation method of the rib-type bionic resistance-reducing wear-resistant structure has the advantages that the rib section of the rib-type bionic resistance-reducing wear-resistant structure is arc-shaped, the width of the contact surface of the rib and a substrate is 5mm, and the height of the highest part of the arc-shaped rib is 1.3 mm.

The invention relates to an application of a ribbed bionic resistance-reducing wear-resistant structure on the surface of a soil-contacting part of an agricultural implement, wherein the distribution distance of ribbed monomers of the ribbed bionic resistance-reducing wear-resistant structure on the surface of the soil-contacting part of the agricultural implement is 5-12.5 mm.

Furthermore, the ridge monomer distribution interval of the ridge type bionic resistance-reducing wear-resisting structure on the surface of the soil-contacting part of the agricultural implement is 7.5 mm.

Further, the agricultural implement soil contacting component comprises a subsoiler arm.

The invention has the beneficial effects that:

the iron-based alloy welding layer provided by the invention has the characteristics of impact resistance, wear resistance and good corrosion resistance due to the special proportion and crystal structure, and the solubility of an alloy system and a matrix metal compound is greatly improved in the plasma spray welding process, so that the binding force of the iron-based alloy and a matrix is enhanced. The wear-resistant additive is applied to the surface of a soil-contacting part of an agricultural implement, so that the problems that the surface of the agricultural implement and the wear-resistant layer are not easy to combine and are easy to break in the traditional additive processing method can be solved.

According to the preparation method of the ribbed bionic resistance-reducing wear-resistant structure, the bionic surface technology and the plasma spray welding technology are combined, and the iron-based alloy powder is fully melted in the spray welding process by adjusting the plasma spray welding parameters, so that the bonding strength of the bionic resistance-reducing wear-resistant structure and a substrate is enhanced. The bionic scallop has the advantages that the contact state of material particles and a contact surface can be changed by the aid of the ridge-shaped structure with the arc-shaped cross section, so that the material particles are changed from sliding contact with a traditional plane contact surface into rolling contact with the ridge-shaped structure, and abrasion of the material to the contact surface is reduced. Compared with the existing bionic surface treatment technology, the preparation method has the advantages of simple operation, high processing efficiency, low cost and good effect.

The ribbed bionic resistance-reducing wear-resistant structure prepared by the preparation method is applied to wear-resistant treatment of the surface of the soil-contacting part of the agricultural implement, can effectively improve the wear resistance and resistance-reducing performance of the surface of the soil-contacting part of the agricultural implement, solves the problem that the soil-contacting part of the agricultural implement is short in service life as a vulnerable part, reduces the failure rate of the soil-contacting part including a subsoiler arm, further reduces environmental damage and economic loss, and has good market application prospect.

Drawings

FIG. 1 is a schematic structural diagram of a ribbed bionic drag-reducing wear-resistant structure prepared on the surface of a subsoiler arm in example 10;

FIG. 2 is a partial enlarged view of a ribbed bionic resistance-reducing wear-resistant structure on the surface of the shovel arm of the subsoiler in FIG. 1;

in the figure, 1 is a subsoiler arm; 2, a ribbed bionic resistance-reducing wear-resistant structure; and 3, the surface of the base material of the shovel arm of the subsoiler.

Detailed Description

The technical solutions of the present invention are further described below with reference to the following examples, but the present invention is not limited thereto, and any modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention. The process equipment or apparatus not specifically mentioned in the following examples are conventional in the art, and if not specifically mentioned, the raw materials and the like used in the examples of the present invention are commercially available; unless otherwise specified, the technical means used in the examples of the present invention are conventional means well known to those skilled in the art.

Example 1

This example provides an iron-based alloy powder including Fe, Cr, Ni, C, Si, B, La, Ce, and Pr elements in a mass ratio of 56:24:6:4:3:3:2:1: 1.

In the embodiment, the iron-based alloy powder is a powder prepared by mixing and grinding pure metal powders of Fe, Cr, Ni, C, Si, B, La, Ce and Pr with the purity of more than 99.9% to the particle size of 45-100 mu m.

Example 2

The embodiment provides a preparation method of a ribbed bionic resistance-reducing wear-resistant structure, which combines a ribbed geometric structure on the surface of a bionic scallop, takes iron-based alloy powder as a raw material, and performs spray welding on the surface to be subjected to spray welding by adopting a plasma spray welding method according to the size parameters of the ribbed bionic resistance-reducing wear-resistant structure to obtain the ribbed bionic resistance-reducing wear-resistant structure.

In the embodiment, the iron-based alloy powder is pure metal powder of Fe, Cr, Ni, C, Si, B, La, Ce and Pr with the purity of more than 99.9 percent, and the pure metal powder is mixed and ground to be powder with the particle size of 45-100 mu m according to the mass ratio of 56:24:6:4:3:3:2:1: 1.

The specific preparation method of the ribbed bionic drag-reducing wear-resistant structure comprises the following steps:

firstly, wiping the surface to be spray-welded with alcohol to remove dirt and oil stains on the surface before spray-welding, then sequentially grinding the surface to be spray-welded with 80-mesh, 240-mesh and 400-mesh sandpaper, and removing surface scale and burrs until the surface to be spray-welded is polished to the roughness of Ra0.8-Ra1.6.

And secondly, heating the iron-based alloy powder for 2 hours at 120 ℃ before spray welding for standby.

And thirdly, performing spray welding on the surface to be subjected to spray welding by adopting a plasma welding machine with the model number of DML-V02BD according to the size parameters of the rib-shaped bionic resistance-reducing wear-resistant structure, wherein the input power supply is AC220V, the ionic gas flow is 0.2L/min, the powder feeding gas flow is 0.3L/min, the shielding gas flow is 3L/min, the ionized gas, the powder feeding gas and the shielding gas are pure argon, the powder feeding speed of a powder feeder is 50g/min, the distance between a welding gun and the surface to be subjected to spray welding is 7mm, and the walking speed of the welding gun is 1.5 mm/s.

Example 3

The difference between the present embodiment and embodiment 2 is only that the input power of the plasma welding machine in the present embodiment is AC220V, the ion gas flow is 0.2L/min, the powder feeding gas flow is 0.2L/min, the shielding gas flow is 3L/min, all of the ionized gas, the powder feeding gas and the shielding gas are pure argon gas, the powder feeding speed of the powder feeder is 20g/min, the distance between the welding gun and the surface to be spray-welded is 7mm, and the traveling speed of the welding gun is 1.5 mm/s.

Example 4

The difference between the present embodiment and embodiment 2 is only that the input power of the plasma welding machine in the present embodiment is AC220V, the ion gas flow is 0.3L/min, the powder feeding gas flow is 0.3L/min, the shielding gas flow is 3L/min, all of the ionized gas, the powder feeding gas and the shielding gas are pure argon gas, the powder feeding speed of the powder feeder is 30g/min, the distance between the welding gun and the surface to be spray-welded is 7mm, and the traveling speed of the welding gun is 1.5 mm/s.

Example 5

In the embodiment, the rib-type bionic drag reduction wear-resistant structure is prepared on the surface of the strip 60Si2Mn steel sample by spray welding, and the specific preparation method comprises the following steps:

step one, strip 60Si with the size of 40mm multiplied by 20mm multiplied by 4mm₂The Mn steel sample is used as a base material, alcohol is firstly used for wiping and removing dirt and oil stains on the surface before spray welding, then 80-mesh, 240-mesh and 400-mesh sand papers are sequentially used for grinding the surface to be spray welded, and surface oxide scales and burrs are removed until the surface to be spray welded is polished to the roughness of Ra0.8-Ra1.6.

And secondly, heating the iron-based alloy powder for 2 hours at 120 ℃ before spray welding for standby, wherein the iron-based alloy powder is Fe, Cr, Ni, C, Si, B, La, Ce and Pr pure metal powder with the purity of more than 99.9% in the embodiment, and the pure metal powder is mixed and ground to have the particle size of 45-100 mu m according to the mass ratio of 56:24:6:4:3: 2:1: 1.

Step three, this embodiment bionical drag reduction wear-resisting structure of fringe type's fringe cross-section is the arc, and the width of fringe and substrate contact surface is 5mm, and the height of fringe arc highest point is 1.3mm, and the fringe of spray welding is totally 4, and the fringe monomer distribution interval is 5 mm.

And (3) carrying out spray welding on the surface to be subjected to spray welding by adopting a plasma welding machine with the model number of DML-V02BD according to the dimensional parameters of the rib-type bionic resistance-reducing wear-resistant structure in the embodiment to obtain the rib-type bionic resistance-reducing wear-resistant structure. The specific spray welding method of the embodiment includes that an input power supply is AC220V, the ion gas flow is 0.2L/min, the powder feeding gas flow is 0.3L/min, the protective gas flow is 3L/min, ionized gas, powder feeding gas and protective gas are all pure argon, the powder feeding speed of a powder feeder is 50g/min, the distance between a welding gun and a surface to be spray-welded is 7mm, and the traveling speed of the welding gun is 1.5 mm/s.

Example 6

In the embodiment, the rib-type bionic drag reduction wear-resistant structure is prepared on the surface of the strip 60Si2Mn steel sample by spray welding, and the specific preparation method comprises the following steps:

step one, strip 60Si with the size of 40mm multiplied by 20mm multiplied by 4mm₂The Mn steel sample is used as a base material, alcohol is firstly used for wiping and removing dirt and oil stains on the surface before spray welding, then 80-mesh, 240-mesh and 400-mesh sand papers are sequentially used for grinding the surface to be spray welded, and surface oxide scales and burrs are removed until the surface to be spray welded is polished to the roughness of Ra0.8-Ra1.6.

And secondly, heating the iron-based alloy powder for 2 hours at 120 ℃ before spray welding for standby, wherein the iron-based alloy powder is Fe, Cr, Ni, C, Si, B, La, Ce and Pr pure metal powder with the purity of more than 99.9% in the embodiment, and the pure metal powder is mixed and ground to have the particle size of 45-100 mu m according to the mass ratio of 56:24:6:4:3: 2:1: 1.

Step three, this embodiment bionical drag reduction wear-resisting structure of fringe type's fringe cross-section is the arc, and the width of fringe and substrate contact surface is 5mm, and the height of fringe arc highest point is 1.3mm, and the fringe of spray welding is totally 3, and the fringe monomer distribution interval is 7.5 mm.

And (3) carrying out spray welding on the surface to be subjected to spray welding by adopting a plasma welding machine with the model number of DML-V02BD according to the dimensional parameters of the rib-type bionic resistance-reducing wear-resistant structure in the embodiment to obtain the rib-type bionic resistance-reducing wear-resistant structure. The specific spray welding method of the embodiment includes that an input power supply is AC220V, the ion gas flow is 0.2L/min, the powder feeding gas flow is 0.3L/min, the protective gas flow is 3L/min, ionized gas, powder feeding gas and protective gas are all pure argon, the powder feeding speed of a powder feeder is 50g/min, the distance between a welding gun and a surface to be spray-welded is 7mm, and the traveling speed of the welding gun is 1.5 mm/s.

Example 7

This embodiment uses 60Si stripes₂The surface of the Mn steel sample is spray-welded to prepare a ribbed bionic resistance-reducing wear-resistant structure, and the specific preparation method comprises the following steps:

step one, strip 60Si with the size of 40mm multiplied by 20mm multiplied by 4mm₂The Mn steel sample is used as a base material, alcohol is firstly used for wiping and removing dirt and oil stains on the surface before spray welding, then 80-mesh, 240-mesh and 400-mesh sand papers are sequentially used for grinding the surface to be spray welded, and surface oxide scales and burrs are removed until the surface to be spray welded is polished to the roughness of Ra0.8-Ra1.6.

And secondly, heating the iron-based alloy powder for 2 hours at 120 ℃ before spray welding for standby, wherein the iron-based alloy powder is Fe, Cr, Ni, C, Si, B, La, Ce and Pr pure metal powder with the purity of more than 99.9% in the embodiment, and the pure metal powder is mixed and ground to have the particle size of 45-100 mu m according to the mass ratio of 56:24:6:4:3: 2:1: 1.

Step three, this embodiment bionical drag reduction wear-resisting structure of fringe type's fringe cross-section is the arc, and the width of fringe and substrate contact surface is 5mm, and the height of fringe arc highest point is 1.3mm, and the fringe of spray welding is totally 3, and the fringe monomer distribution interval is 10 mm.

And (3) carrying out spray welding on the surface to be subjected to spray welding by adopting a plasma welding machine with the model number of DML-V02BD according to the dimensional parameters of the rib-type bionic resistance-reducing wear-resistant structure in the embodiment to obtain the rib-type bionic resistance-reducing wear-resistant structure. The specific spray welding method of the embodiment includes that an input power supply is AC220V, the ion gas flow is 0.2L/min, the powder feeding gas flow is 0.3L/min, the protective gas flow is 3L/min, ionized gas, powder feeding gas and protective gas are all pure argon, the powder feeding speed of a powder feeder is 50g/min, the distance between a welding gun and a surface to be spray-welded is 7mm, and the traveling speed of the welding gun is 1.5 mm/s.

Example 8

In the embodiment, the rib-type bionic drag reduction wear-resistant structure is prepared on the surface of the strip 60Si2Mn steel sample by spray welding, and the specific preparation method comprises the following steps:

step one, strip 60Si with the size of 40mm multiplied by 20mm multiplied by 4mm₂The Mn steel sample is used as a base material, surface dirt and oil stain are removed by wiping with alcohol before spray welding, and then 80 meshes and 2 meshes are sequentially utilizedAnd grinding the surface to be spray-welded by 40-mesh and 400-mesh sandpaper, and removing surface oxide skin and burrs until the surface to be spray-welded is ground to have the roughness of Ra0.8-Ra1.6.

And secondly, heating the iron-based alloy powder for 2 hours at 120 ℃ before spray welding for standby, wherein the iron-based alloy powder is Fe, Cr, Ni, C, Si, B, La, Ce and Pr pure metal powder with the purity of more than 99.9% in the embodiment, and the pure metal powder is mixed and ground to have the particle size of 45-100 mu m according to the mass ratio of 56:24:6:4:3: 2:1: 1.

Step three, this embodiment bionical drag reduction wear-resisting structure of fringe type's fringe cross-section is the arc, and the width of fringe and substrate contact surface is 5mm, and the height of fringe arc highest point is 1.3mm, and the fringe of spray welding is totally 3, and the fringe monomer distribution interval is 12.5 mm.

And (3) carrying out spray welding on the surface to be subjected to spray welding by adopting a plasma welding machine with the model number of DML-V02BD according to the dimensional parameters of the rib-type bionic resistance-reducing wear-resistant structure in the embodiment to obtain the rib-type bionic resistance-reducing wear-resistant structure. The specific spray welding method of the embodiment includes that an input power supply is AC220V, the ion gas flow is 0.2L/min, the powder feeding gas flow is 0.3L/min, the protective gas flow is 3L/min, ionized gas, powder feeding gas and protective gas are all pure argon, the powder feeding speed of a powder feeder is 50g/min, the distance between a welding gun and a surface to be spray-welded is 7mm, and the traveling speed of the welding gun is 1.5 mm/s.

Comparative example 1

This comparative example is in the form of a strip of 60Si₂The surface of the Mn steel sample is spray-welded to prepare a ribbed bionic resistance-reducing wear-resistant structure, and the specific preparation method comprises the following steps:

step one, strip 60Si with the size of 40mm multiplied by 20mm multiplied by 4mm₂The Mn steel sample is used as a base material, alcohol is firstly used for wiping and removing dirt and oil stains on the surface before spray welding, then 80-mesh, 240-mesh and 400-mesh sand papers are sequentially used for grinding the surface to be spray welded, and surface oxide scales and burrs are removed until the surface to be spray welded is polished to the roughness of Ra0.8-Ra1.6.

And secondly, heating the iron-based alloy powder for 2 hours at 120 ℃ before spray welding for standby, wherein the iron-based alloy powder is Fe, Cr, Ni, C, Si, B, La, Ce and Pr pure metal powder with the purity of more than 99.9% in the embodiment, and the pure metal powder is mixed and ground to have the particle size of 45-100 mu m according to the mass ratio of 56:24:6:4:3: 2:1: 1.

And step three, spray-welding a flat-plate type wear-resistant layer with the thickness of 1.3mm on the surface of the base material, wherein the width of the wear-resistant layer is 100 mm. And (3) carrying out spray welding on the surface to be subjected to spray welding according to the size parameters of the flat wear-resistant layer by adopting a plasma welding machine with the model number of DML-V02BD to obtain the flat bionic resistance-reducing wear-resistant structure. The specific spray welding method of the comparative example comprises the steps that an input power supply is AC220V, the ionic gas flow is 0.2L/min, the powder feeding flow is 0.3L/min, the protective gas flow is 3L/min, ionized gas, powder feeding gas and protective gas are all pure argon, the powder feeding speed of a powder feeder is 50g/min, the distance between a welding gun and the surface to be spray welded is 7mm, and the travelling speed of the welding gun is 1.5 mm/s.

The wear resistance of the ribbed bionic drag reduction wear-resistant structures prepared in examples 5 to 8 and the flat plate type wear-resistant layer prepared in comparative example 1 were examined through a grinding material wear experiment.

The abrasive wear test method comprises the following steps: river sand with proper thickness is selected as an abrasive, and the abrasive with the height of 70mm is put into the charging barrel. Adding a proper amount of water into the charging barrel, and controlling the water amount to be 3-5 wt%. And clamping the sample piece on an abrasive abrasion tester, and carrying out abrasion test for each group for 10 h. The sample wear loss quality data is shown in table 1.

TABLE 1

As can be seen from the comparison of the abrasion loss quality data of the samples in the table 1, the ribbed bionic resistance-reducing wear-resisting structure with the ribbed monomer distribution interval of 7.5mm has the strongest wear resistance.

Example 9

In the embodiment, the rib-type bionic resistance-reducing wear-resistant structure is prepared on the surface of the shovel wall of the subsoiler by spray welding, and the specific preparation method comprises the following steps:

firstly, the subsoiler used in the embodiment meets the national standard requirements, dirt and oil stains on the surface of the wall of the subsoiler are removed by wiping with alcohol before spray welding, then the surface to be spray welded is ground by using 80-mesh, 240-mesh and 400-mesh abrasive paper in sequence, and surface oxide scales and burrs are removed until the surface to be spray welded is polished to the roughness of Ra0.8-Ra1.6.

And secondly, heating the iron-based alloy powder for 2 hours at 120 ℃ before spray welding for standby, wherein the iron-based alloy powder is Fe, Cr, Ni, C, Si, B, La, Ce and Pr pure metal powder with the purity of more than 99.9% in the embodiment, and the pure metal powder is mixed and ground to have the particle size of 45-100 mu m according to the mass ratio of 56:24:6:4:3: 2:1: 1.

Step three, this embodiment bionical drag reduction wear-resisting structure of fringe type's fringe cross-section is the arc, and the width of fringe and substrate contact surface is 5mm, and the height of fringe arc highest point is 1.3mm, and the fringe of spray welding is totally 60, and the fringe monomer distribution interval is 5 mm.

And (3) carrying out spray welding on the surface of the subsoiler arm to be spray welded by adopting a plasma welding machine with the model number being DML-V02BD according to the dimensional parameters of the ribbed bionic resistance-reducing wear-resistant structure of the embodiment to obtain the ribbed bionic resistance-reducing wear-resistant structure which is arranged in a rib shape and is vertical to the cultivating direction of the subsoiler.

The specific spray welding method of the embodiment comprises the steps that an input power supply is AC220V, the ion gas flow is 0.3L/min, the powder feeding gas flow is 0.3L/min, the protective gas flow is 3L/min, ionized gas, powder feeding gas and protective gas are all pure argon, the powder feeding speed of a powder feeder is 50g/min, the distance between a welding gun and the surface to be spray-welded is 7mm, and the traveling speed of the welding gun is 1.5 mm/s.

Example 10

In the embodiment, the rib-type bionic resistance-reducing wear-resistant structure is prepared on the surface of the shovel wall of the subsoiler by spray welding, and the specific preparation method comprises the following steps:

firstly, the subsoiler used in the embodiment meets the national standard requirements, dirt and oil stains on the surface of the wall of the subsoiler are removed by wiping with alcohol before spray welding, then the surface to be spray welded is ground by using 80-mesh, 240-mesh and 400-mesh abrasive paper in sequence, and surface oxide scales and burrs are removed until the surface to be spray welded is polished to the roughness of Ra0.8-Ra1.6.

And secondly, heating the iron-based alloy powder for 2 hours at 120 ℃ before spray welding for standby, wherein the iron-based alloy powder is Fe, Cr, Ni, C, Si, B, La, Ce and Pr pure metal powder with the purity of more than 99.9% in the embodiment, and the pure metal powder is mixed and ground to have the particle size of 45-100 mu m according to the mass ratio of 56:24:6:4:3: 2:1: 1.

Step three, this embodiment bionical drag reduction wear-resisting structure of fringe type's fringe cross-section is the arc, and the width of fringe and substrate contact surface is 5mm, and the height of fringe arc highest point is 1.3mm, and the fringe of spray welding is totally 48, and the fringe monomer distribution interval is 7.5 mm.

And (3) carrying out spray welding on the surface of the subsoiler arm to be spray welded by adopting a plasma welding machine with the model number being DML-V02BD according to the dimensional parameters of the ribbed bionic resistance-reducing wear-resistant structure of the embodiment to obtain the ribbed bionic resistance-reducing wear-resistant structure which is arranged in a rib shape and is vertical to the cultivating direction of the subsoiler.

The specific spray welding method of the embodiment includes that an input power supply is AC220V, the ion gas flow is 0.2L/min, the powder feeding gas flow is 0.3L/min, the protective gas flow is 3L/min, ionized gas, powder feeding gas and protective gas are all pure argon, the powder feeding speed of a powder feeder is 50g/min, the distance between a welding gun and a surface to be spray-welded is 7mm, and the traveling speed of the welding gun is 1.5 mm/s.

Example 11

In the embodiment, the rib-type bionic resistance-reducing wear-resistant structure is prepared on the surface of the shovel wall of the subsoiler by spray welding, and the specific preparation method comprises the following steps:

firstly, the subsoiler used in the embodiment meets the national standard requirements, dirt and oil stains on the surface of the wall of the subsoiler are removed by wiping with alcohol before spray welding, then the surface to be spray welded is ground by using 80-mesh, 240-mesh and 400-mesh abrasive paper in sequence, and surface oxide scales and burrs are removed until the surface to be spray welded is polished to the roughness of Ra0.8-Ra1.6.

And secondly, heating the iron-based alloy powder for 2 hours at 120 ℃ before spray welding for standby, wherein the iron-based alloy powder is Fe, Cr, Ni, C, Si, B, La, Ce and Pr pure metal powder with the purity of more than 99.9% in the embodiment, and the pure metal powder is mixed and ground to have the particle size of 45-100 mu m according to the mass ratio of 56:24:6:4:3: 2:1: 1.

Step three, this embodiment bionical drag reduction wear-resisting structure of fringe type's fringe cross-section is the arc, and the width of fringe and substrate contact surface is 5mm, and the height of fringe arc highest point is 1.3mm, and the fringe of spray welding is totally 40, and the fringe monomer distribution interval is 10 mm.

And (3) carrying out spray welding on the surface of the subsoiler arm to be spray welded by adopting a plasma welding machine with the model number being DML-V02BD according to the dimensional parameters of the ribbed bionic resistance-reducing wear-resistant structure of the embodiment to obtain the ribbed bionic resistance-reducing wear-resistant structure which is arranged in a rib shape and is vertical to the cultivating direction of the subsoiler.

The specific spray welding method of the embodiment includes that an input power supply is AC220V, the ion gas flow is 0.2L/min, the powder feeding gas flow is 0.3L/min, the protective gas flow is 3L/min, ionized gas, powder feeding gas and protective gas are all pure argon, the powder feeding speed of a powder feeder is 50g/min, the distance between a welding gun and a surface to be spray-welded is 7mm, and the traveling speed of the welding gun is 1.5 mm/s.

Example 12

In the embodiment, the rib-type bionic resistance-reducing wear-resistant structure is prepared on the surface of the shovel wall of the subsoiler by spray welding, and the specific preparation method comprises the following steps:

firstly, the subsoiler used in the embodiment meets the national standard requirements, dirt and oil stains on the surface of the wall of the subsoiler are removed by wiping with alcohol before spray welding, then the surface to be spray welded is ground by using 80-mesh, 240-mesh and 400-mesh abrasive paper in sequence, and surface oxide scales and burrs are removed until the surface to be spray welded is polished to the roughness of Ra0.8-Ra1.6.

And secondly, heating the iron-based alloy powder for 2 hours at 120 ℃ before spray welding for standby, wherein the iron-based alloy powder is Fe, Cr, Ni, C, Si, B, La, Ce and Pr pure metal powder with the purity of more than 99.9% in the embodiment, and the pure metal powder is mixed and ground to have the particle size of 45-100 mu m according to the mass ratio of 56:24:6:4:3: 2:1: 1.

Step three, the rib section of the bionic resistance-reducing wear-resisting structure of the rib type of the embodiment is arc-shaped, the width of the contact surface of the ribs and the substrate is 5mm, the height of the highest position of the arc-shaped ribs is 1.3mm, the number of spray-welded ribs is 36, and the distribution interval of rib monomers is 12.5 mm.

And (3) carrying out spray welding on the surface of the subsoiler arm to be spray welded by adopting a plasma welding machine with the model number being DML-V02BD according to the dimensional parameters of the ribbed bionic resistance-reducing wear-resistant structure of the embodiment to obtain the ribbed bionic resistance-reducing wear-resistant structure which is arranged in a rib shape and is vertical to the cultivating direction of the subsoiler.

The specific spray welding method of the embodiment includes that an input power supply is AC220V, the ion gas flow is 0.2L/min, the powder feeding gas flow is 0.3L/min, the protective gas flow is 3L/min, ionized gas, powder feeding gas and protective gas are all pure argon, the powder feeding speed of a powder feeder is 50g/min, the distance between a welding gun and a surface to be spray-welded is 7mm, and the traveling speed of the welding gun is 1.5 mm/s.

The wear resistance of the ribbed bionic drag-reducing wear-resistant structure on the subsoiler walls prepared in examples 9-12 and the unprocessed standard subsoiler walls was examined by abrasive wear experiments.

Abrasive wear test: the experiment is carried out in a black land test field and a Xinjiang sandy soil test field in Heilongjiang province, the tillage depth of a subsoiling shovel is 30cm, the tillage speed is 4km/h, the tillage time is 5h, 10h and 15h, and the quality difference before and after the abrasion of the subsoiling shovel is shown in a table 2.

TABLE 2

As can be seen from the comparison of the mass difference data before and after the abrasion of the subsoiler in the table 2, the ridge type bionic drag reduction wear-resistant structure with the ridge monomer distribution interval of 7.5mm enables the obtained improvement effect of the wear resistance of the subsoiler to be most remarkable.

When the depth of cultivation was 30cm, the average resistance value (N) and the drag reduction ratio (%) of the subsoiler working on black and sandy soil were examined at various cultivation speeds of 4km/h, 5km/h and 6km/h, and the results are shown in Table 3.

TABLE 3

As can be seen from the comparison of the average resistance value and the drag reduction rate data in the table 3, the ridge type bionic drag reduction wear-resistant structure with the ridge monomer distribution interval of 7.5mm enables the subsoiler to obtain a lower average resistance value and a higher drag reduction rate.

The iron-based alloy welding layer provided by the invention has the characteristics of impact resistance, wear resistance and good corrosion resistance due to the special proportion and crystal structure, and the solubility of an alloy system and a matrix metal compound is greatly improved in the plasma spray welding process, so that the binding force of iron-based alloy powder and a matrix is enhanced.

According to the preparation method of the ribbed bionic resistance-reducing wear-resistant structure, the bionic surface technology and the plasma spray welding technology are combined, and the iron-based alloy powder is fully melted in the spray welding process by adjusting the plasma spray welding parameters, so that the bonding strength of the bionic resistance-reducing wear-resistant structure and a substrate is enhanced. The preparation method of the iron-based alloy powder and the ribbed bionic resistance-reducing wear-resistant structure is applied to wear-resistant treatment of the surface of the soil-contacting part of the agricultural implement, so that the problems that the surface of the agricultural implement and a wear-resistant layer are not easy to combine and are easy to break in the traditional additive treatment method can be solved.

The section that bionical scallop obtained can change the contact state of material granule and contact surface for the ribbed structure of circular arc, make the material granule change into the rolling contact with ribbed structure by the sliding contact with traditional plane contact surface, the wearing and tearing of material to contact surface have been alleviateed, be applied to the wearing and tearing of agricultural implement contact soil part surface with it, wear-resisting and the drag reduction performance on agricultural implement contact soil part surface have effectively been promoted, the problem that agricultural implement contact soil part is as wearing parts life weak point has been solved, the failure rate of contact soil part including subsoiler arm is reduced, and then environmental destruction and economic loss have been reduced, good market perspective has been had.