阅读说明：本技术 一种具有梯度耐磨涂层的刀具及其制备方法和旋耕机 (A kind of cutter with gradient wear-resistant coating and preparation method thereof and rotary cultivator ) 是由 龙伟民 钟素娟 纠永涛 黄俊兰 孙华为 秦建 路全彬 董显 于 2019-09-02 设计创作，主要内容包括：本发明涉及农机装备技术领域,尤其是涉及一种具有梯度耐磨涂层的刀具及其制备方法和旋耕机。所述具有梯度耐磨涂层的刀具,包括刀具基体和附着于刀具基体表面的耐磨涂层,所述耐磨涂层包括由基体表面方向起依次交替设置的涂层A和涂层B；所述涂层A中含有YG8颗粒；所述涂层B中含有金刚石微粉；其中YG8颗粒的尺寸大于金刚石微粉的尺寸。所述制备方法包括：在预处理的刀具表面喷涂所述耐磨涂层。本发明采用两种涂层交替构成刀具的梯度耐磨涂层,与堆焊法相比,涂层热应力小,刀具基体无裂纹的萌生和扩展,与常规制备法相比,涂层较厚,耐磨性能好。(The present invention relates to Agricultural Machinery Equipment technical fields, more particularly, to a kind of cutter with gradient wear-resistant coating and preparation method thereof and rotary cultivator.The cutter with gradient wear-resistant coating, including tool matrix and the wear-resistant coating for being attached to tool matrix surface, the wear-resistant coating includes the coating A and coating B being successively arranged alternately by matrix surface direction；Contain YG8 particle in the coating A；Contain diadust in the coating B；Wherein the size of YG8 particle is greater than the size of diadust.The preparation method includes: to spray the wear-resistant coating in pretreated tool surface.The present invention alternately constitutes the gradient wear-resistant coating of cutter using two kinds of coatings, and compared with welding method, coating thermal stress is small, and the germinating and extension of tool matrix flawless, compared with conventional the preparation method, coating is thicker, and wear-resisting property is good.)

1. a kind of cutter with gradient wear-resistant coating, which is characterized in that including tool matrix and be attached to tool matrix surface Wear-resistant coating, the wear-resistant coating includes the coating A and coating B being successively arranged alternately by matrix surface direction；

Contain YG8 particle in the coating A；Contain diadust in the coating B；

Wherein the size of YG8 particle is greater than the size of diadust.

2. the cutter according to claim 1 with gradient wear-resistant coating, which is characterized in that the granularity of the YG8 particle For 60-80 mesh；

Preferably, the granularity of the diadust is 200-325 mesh；

It is furthermore preferred that the granularity of the diadust is 250-300 mesh.

3. the cutter according to claim 1 with gradient wear-resistant coating, which is characterized in that in the coating A and coating B It further include solder；

It preferably, include nickel-based solder in the coating A；

It preferably, include nickel-based solder in the coating B；

It is furthermore preferred that the nickel-based solder includes any in BNi72CrP solder, BNi76CrP solder and BNi65CrP solder Kind is a variety of；

Preferably, the granularity of the solder is 180-300 mesh.

4. the cutter according to claim 1-3 with gradient wear-resistant coating, which is characterized in that the coating A In include 20-35 part of YG8 particle according to parts by weight and nickel-based solder 65-80 parts.

5. the cutter according to claim 1-3 with gradient wear-resistant coating, which is characterized in that the coating B In include 8-12 part of diadust according to parts by weight and nickel-based solder 88-92 parts.

6. the cutter according to claim 1-3 with gradient wear-resistant coating, which is characterized in that the wear-resisting painting Layer with a thickness of 1.5-5mm；

Preferably, each coating A with a thickness of 0.2-0.3mm；

Preferably, each coating B with a thickness of 0.15-0.2mm.

7. the preparation method of the cutter described in any one of claims 1-6 with gradient wear-resistant coating, which is characterized in that including Following steps:

The wear-resistant coating is sprayed in pretreated tool surface.

8. the preparation method of the cutter according to claim 7 with gradient wear-resistant coating, which is characterized in that the spraying Method include supersonic flame spraying；

Preferably, the condition of the supersonic flame spraying includes: spray gun muzzle and tool matrix surface distance 15-25cm；Spray Rifle movement speed is 10 ± 2m/min；18 ± 2L/h of aviation kerosine；Oxygen flow is 720 ± 20L/min；Nitrogen flow be 10 ± 2L/min；Coating material flow is 52 ± 2g/min.

9. the preparation method of the cutter according to claim 7 or 8 with gradient wear-resistant coating, which is characterized in that pre- The tool surface of processing first sprays one layer of coating A, then sprays one layer of coating B on the surface of coating A, repeats the step, until Wear-resistant coating with a thickness of 1.5-5mm.

10. containing the rotary cultivator of cutter described in any one of claims 1-6.

Technical field

The present invention relates to Agricultural Machinery Equipment technical fields, more particularly, to a kind of cutter and its system with gradient wear-resistant coating Preparation Method and rotary cultivator.

Background technique

Rotary blade is the important part of rotary cultivator, while being dominant loss part again.The performance of rotary blade will directly affect rotation Working efficiency, service life and the economic benefit for the machine of ploughing.The abrasion and replacement of rotary blade cause very big loss every year.Therefore, it adopts Wear-resistant coating is prepared on rotary blade surface with sufacing to be of great significance.

Currently, using sufacing rotary blade working face prepare wear-resistant coating using less, but in certain part works It is but very universal for the application of wear-resistant coating to make wheat flour.Common sufacing have physical vaporous deposition, chemical vapour deposition technique, Hot spray process, welding method and the pricker coating developed in recent years.The wearing layer thickness that preceding several method obtains is limited, and pricker coating energy Obtain the biggish coating of thickness range.In addition, pricker coating device therefor is simple, technological flexibility is higher, it can be with lower cost There is the function of surface coating of the excellent properties such as wear-resistant, corrosion-resistant in workpiece surface preparation.

To be evenly distributed with degree not high for hard phase in cutter coat at present, is easy to especially proximate to hard phase in coating at tool matrix Coating surface is floated on, coating performance is caused to decline；Coating surface smooth degree is poor, influences cutter working efficiency.

In view of this, the present invention is specifically proposed.

Summary of the invention

The first object of the present invention is to provide a kind of cutter with gradient wear-resistant coating, to solve to deposit in the prior art Cutter work low efficiency technical problem.

The second object of the present invention is to provide a kind of preparation method of cutter with gradient wear-resistant coating, operation letter It is single, favorable repeatability.

The third object of the present invention is to provide a kind of rotary cultivator, contains the above-mentioned cutter with gradient wear-resistant coating, energy The service life of rotary blade is enough effectively improved, working efficiency is improved.

In order to realize above-mentioned purpose of the invention, the following technical scheme is adopted:

A kind of cutter with gradient wear-resistant coating, including tool matrix and the wear-resisting painting for being attached to tool matrix surface Layer, the wear-resistant coating includes the coating A and coating B being successively arranged alternately by matrix surface direction；

Contain YG8 particle in the coating A；Contain diadust in the coating B；

Wherein the size of YG8 particle is greater than the size of diadust.

Carbide is as reinforced phase, and still there is a big difference for wear-resisting property, and its particle is generally large, prominent coating table Face, coating surface smoothness is poor, influences cutter working efficiency.In contrast, the hardness of diadust is high, wearability is good, makees It can be improved the performance of coating for reinforced phase.

Cutter of the invention, coating are alternately made of the gradient wear-resistant coating of cutter the coating of the variable grain containing there are two types of, Coating innermost layer hard phase be bulky grain YG8 particle, the outermost hard phase of coating be short grained diadust, big The YG8 particle of grain is not easy to float on the surface, and hard phase is evenly distributed with degree raising, the surface of short grained diadust at tool matrix Coating is smooth, is not easy to wind weeds, effectively promotes the wear-resisting property and service life of cutter.

Cutter of the invention is preferably rotary blade.

It further include solder in the coating A and coating B in a preferred embodiment of the invention.

Preferably, the coating A further includes nickel-based solder.The coating B further includes nickel-based solder.

In a preferred embodiment of the invention, including 20-35 parts of YG8 particle according to parts by weight in the coating A With 65-80 parts of nickel-based solder.

As in different embodiments, in material used by coating A, the dosage of YG8 particle can for 20 parts, 21 parts, 22 parts, 23 parts, 24 parts, 25 parts, 26 parts, 27 parts, 28 parts, 29 parts, 30 parts, 31 parts, 32 parts, 33 parts, 34 parts and 35 parts etc..Nickel The dosage of base solder can be 65 parts, 66 parts, 67 parts, 68 parts, 69 parts, 70 parts, 71 parts, 72 parts, 73 parts, 74 parts, 75 parts, 76 Part, 77 parts, 78 parts, 79 parts and 80 parts etc..

Coating material is mixed to get using YG8 particle and nickel-based solder, forms coating A using modes such as sprayings.Wherein mix Mechanical alloying method can be used in conjunction mode.

Include 8-12 part of diadust according to parts by weight in an of the invention preferred embodiment, in coating B with 88-92 parts of nickel-based solder.

As in different embodiments, in material used by coating B, the dosage of diadust can for 8 parts, 9 parts, 10 parts, 11 parts and 12 parts etc..The dosage of nickel-based solder can be 88 parts, 89 parts, 90 parts, 91 parts and 92 parts etc..

Another coating material is mixed to get using diadust and nickel-based solder, forms coating B using modes such as sprayings. Wherein mechanical alloying method can be used in hybrid mode.

Optionally, the nickel-based solder includes appointing in BNi72CrP solder, BNi76CrP solder and BNi65CrP solder It is one or more.The granularity of nickel-based solder can be 180-300 mesh, preferably 200-300 mesh.

Optionally, the granularity of the YG8 particle is 60-80 mesh.

Optionally, the granularity of the diadust is 200-325 mesh, preferably 250-300 mesh.

Optionally, the wear-resistant coating with a thickness of 1.5-5mm.

As in different embodiments, the thickness of wear-resistant coating can for 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm and 5mm etc..

In an of the invention preferred embodiment, each coating A with a thickness of 0.2-0.3mm；Each coating B With a thickness of 0.15-0.2mm.

The present invention also provides a kind of preparation methods of cutter with gradient wear-resistant coating, include the following steps:

The wear-resistant coating is sprayed in pretreated tool surface.

Preferably, the method for the spraying includes supersonic flame spraying.

The diamond coatings of conventional pricker coating preparation are relatively thin, and wear-resisting property cannot reach requirement；Welding method can prepare thicker Diamond coatings, but built-up welding temperature is high, and diamond is easily graphitized, and coating stress is big, easily promotes crack initiation and propagation.And Using supersonic flame spraying, the rate of heat addition is fast, small to the thermal damage of base material and diadust, is not necessarily at heat after coating preparation Reason.

In an of the invention preferred embodiment, wear-resistant coating with a thickness of 1.5-5mm.Each coating A with a thickness of The radian of 0.2-0.3mm, each coating B are 0.15-0.2mm.

As in actual operation, one layer of coating A is sprayed in pretreated tool surface, then sprays one on the surface coating A Layer coating B, repeats abovementioned steps, until the thickness of wear-resistant coating is within the scope of 1.5-5mm.

Optionally, using the non-spraying region of heat-resisting material protection cutter.It can avoid according to actual needs to non-spraying It causes accidentally to spray in region.Preferably, the heat-resisting material includes aquadag.

Before spraying, area to be sprayed can be preheated.

In a preferred embodiment of the invention, the condition of the supersonic flame spraying includes: spray gun muzzle and cutter Matrix surface distance 15-25cm；Spray gun movement speed is 10 ± 2m/min；18 ± 2L/h of aviation kerosine；Oxygen flow be 720 ± 20L/min；Nitrogen flow is 10 ± 2L/min；Coating material flow is 52 ± 2g/min.

In a preferred embodiment of the invention, the pretreated method includes: will be dry after cutter cleaning, sandblasting.

The present invention also provides a kind of rotary cultivators containing above-mentioned cutter.

Compared with prior art, the invention has the benefit that

(1) present invention alternately constitutes the gradient wear-resistant coating of cutter using two kinds of coatings, and compared with welding method, coating heat is answered Power is small, and the germinating and extension of tool matrix flawless, compared with conventional the preparation method, coating is thicker, and wear-resisting property is good；

(2) in the alternate coating of the present invention, coated inside YG8 containing bulky grain, external skin welds little particle diadust, Bulky grain YG8 is not easy to float on the surface, and hard phase at tool matrix is made to be evenly distributed with degree raising；The surface of little particle diadust applies Layer is smooth, is not easy to wind weeds, effectively promotes the wear-resisting property and service life of cutter；

(3) present invention prepares gradient coating using supersonic flame spraying method, and heating speed is fast, timber and diamond are micro- The thermal damage of powder is small, and without heat treatment after coating preparation, the preparation for realizing coating is integrated with heat treatment.

Detailed description of the invention

It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor It puts, is also possible to obtain other drawings based on these drawings.

Fig. 1 is the structural schematic diagram of the cutter provided in an embodiment of the present invention with gradient wear-resistant coating.

Appended drawing reference:

1- tool matrix；2- coating A₁；3- coating B₁；

4- coating A₂；5- coating B₂。

Specific embodiment

Technical solution of the present invention is clearly and completely described below in conjunction with the drawings and specific embodiments, but Be it will be understood to those of skill in the art that it is following described embodiments are some of the embodiments of the present invention, rather than it is whole Embodiment is merely to illustrate the present invention, and is not construed as limiting the scope of the invention.Based on the embodiments of the present invention, ability Domain those of ordinary skill every other embodiment obtained without making creative work, belongs to guarantor of the present invention The range of shield.The person that is not specified actual conditions in embodiment, carries out according to conventional conditions or manufacturer's recommended conditions.Agents useful for same Or production firm person is not specified in instrument, is the conventional products that can be obtained by commercially available purchase.

In the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical", The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to Convenient for description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation, It is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.In addition, term " first ", " second ", " third " is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.

In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition Concrete meaning in invention.

Fig. 1 is the structural schematic diagram of the cutter provided in an embodiment of the present invention with gradient wear-resistant coating.The present embodiment Cutter with gradient wear-resistant coating includes tool matrix 1 and the wear-resistant coating for being attached to 1 surface of tool matrix.The wear-resisting painting Layer with a thickness of 1.5-5mm.The wear-resistant coating includes the coating A and coating B being successively arranged alternately by matrix surface direction. As shown in FIG. 1, coating A and coating B replaces twice.Specifically, including coating A₁2 and coating B₁3 and be arranged in coating B₁Coating A on 3₂4 and coating B₂5.Coating A₁2 and coating A₂4 thickness can be 0.2-0.3mm, coating B₁3 and apply Layer B₂5 thickness can be 0.15-0.2mm.For Fig. 1 only for illustrating, the alternate frequency of coating A and coating B are not limited to two It is secondary, can also for more than twice, such as three times, four times, make the wear-resistant coating being arranged alternately with a thickness of 1.5-5mm i.e. It can.