阅读说明：本技术 一种开垦刀及其耐磨涂层制备装置和方法 (Reclamation knife and wear-resistant coating preparation device and method thereof ) 是由 汪瑞军 马小斌 詹华 李振东 徐天杨 鲍曼雨 于 2021-06-15 设计创作，主要内容包括：一种开垦刀及其耐磨涂层制备装置和方法,该开垦刀包括刀体和设置在所述刀体一侧的刃口,所述刀体的尾部为直线部,所述刀体的头部为圆弧部,所述刃口位于所述圆弧部的一侧,所述刃口上包覆有耐磨涂层,所述耐磨涂层为铁基合金涂层,且具有碳化钒硬质相弥散分布的马氏体组织。该开垦刀的耐磨涂层制备装置和制备方法,采用高效率激光熔敷技术和水冷铜合金工装,可以快速在开垦刀刃口部位制备弥散分布VC硬质相的铁基合金涂层,而且避免了开垦刀变形。得到的涂层基体为马氏体组织的含高硬度球状VC硬质相的耐磨涂层,基体硬度达到HRC60～65,在马氏体组织中呈球形弥散分布的VC硬质相,维氏硬度达Hv2800。(The utility model provides a reclamation sword and wear-resisting coating preparation facilities and method thereof, this reclamation sword includes the cutter body and sets up the blade of cutter body one side, the afterbody of cutter body is straight line portion, the head of cutter body is circular arc portion, the blade is located one side of circular arc portion, the cladding has wear-resisting coating on the blade, wear-resisting coating is iron-based alloy coating, and has the martensite tissue of vanadium carbide stereoplasm phase dispersion. According to the device and the method for preparing the wear-resistant coating of the reclamation knife, the high-efficiency laser cladding technology and the water-cooling copper alloy tool are adopted, the iron-based alloy coating with the VC hard phase in dispersed distribution can be rapidly prepared at the cutting edge part of the reclamation knife, and the reclamation knife is prevented from deforming. The obtained coating substrate is a wear-resistant coating containing a high-hardness spherical VC hard phase of a martensite structure, the hardness of the substrate reaches HRC 60-65, the VC hard phase is in spherical dispersion distribution in the martensite structure, and the Vickers hardness reaches Hv 2800.)

1. The utility model provides a reclamation sword, is in including cutter body and setting the blade of cutter body one side, the afterbody of cutter body is straight line portion, the head of cutter body is circular arc portion, the blade is located one side of circular arc portion, its characterized in that, the cladding has wear-resistant coating on the blade, wear-resistant coating is iron-based alloy coating, and has the martensite tissue of vanadium carbide stereoplasm looks dispersion.

2. The reclamation knife of claim 1, wherein the wear resistant coating is a VC hard phase with high hardness spheres of a martensite structure coating matrix, the hardness of the martensite structure coating matrix is HRC 60-65, and the Vickers hardness of the VC hard phase distributed in a spherical dispersion manner in the martensite structure coating matrix is Hv 2800.

3. The utility model provides a reclamation sword's wear-resistant coating preparation facilities which characterized in that includes:

the water-cooling copper alloy tool comprises a supporting body and a copper alloy clamping fixture installed on the supporting body, wherein a water inlet joint and a water outlet joint are arranged on the copper alloy clamping fixture, a water inlet pipe and a water return pipe are arranged in the copper alloy clamping fixture, the water inlet pipe and the water return pipe are respectively connected with a cooling water pump through the water inlet joint and the water outlet joint, the top surface of the copper alloy clamping fixture is matched with the circular arc part of the reclamation knife, and the top surface of the supporting body is matched with the straight line part of the reclamation knife; and

deposit the laser head, correspond set up in copper alloy mould top, it is being fixed in to deposit the laser head be used for the blade surface deposit wear-resistant coating of the reclamation sword on the water-cooling copper alloy frock, wear-resistant coating is iron-based alloy coating, iron-based alloy coating has the martensite tissue of vanadium carbide stereoplasm phase dispersion.

4. The apparatus for preparing a wear-resistant coating layer of a reclamation knife of claim 3, wherein the iron-based alloy coating layer uses iron-based alloy powder having a particle size ranging from 53 μm to 180 μm.

5. The reclamation knife wear resistant coating preparation apparatus of claim 4, wherein the iron based alloy powder comprises the following components in percentage by weight except for Fe: 2.0-2.5% of C, 6-8% of V, 5.0-6.5% of Cr, less than 0.9% of Si and 4.0% of auxiliary materials, wherein the iron-based alloy powder is deposited by laser scanning of the deposition laser head to form a martensite structure with a dispersed VC hard phase.

6. The apparatus for preparing a wear-resistant coating of a reclamation knife as recited in claim 3, 4 or 5, wherein the deposition laser head scans an iron-based alloy coating having a deposition width of 15mm to 20mm and a thickness of 1.0mm to 1.5mm at one time.

7. The apparatus for preparing abrasion resistant coating of reclamation knife of claim 6, wherein the deposition laser head scans the deposition using a rectangular spot of 16mm x 6mm, the laser power of the deposition laser head being 4.5 KW.

8. The apparatus for preparing abrasion resistant coating of reclamation knife of claim 6, wherein the deposition laser head is installed on the robot arm to swing along the cutting edge of the reclamation knife to be processed, and the axis of the deposition laser head is always perpendicular to the surface of the circular arc part of the reclamation knife to be processed.

9. The apparatus for preparing a wear-resistant coating of a reclamation knife of claim 6, wherein the water inlet connector and the water outlet connector are quick connectors with check valves, respectively.

10. The preparation method of the wear-resistant coating of the reclamation knife is characterized by comprising the following steps:

s100, fixing the tail straight part of a reclamation knife to be processed on a support body of a water-cooling copper alloy tool, fixing the head circular arc part of the reclamation knife on a copper alloy clamping fixture of the water-cooling copper alloy tool by using a pressing plate, and tightly attaching the circular arc part of the reclamation knife to the circular arc top surface of the copper alloy clamping fixture;

s200, mounting the water-cooling copper alloy tool on a workbench, wherein the water-cooling copper alloy tool can move vertically and horizontally under the driving of the workbench;

s300, respectively connecting a water inlet connector and a water outlet connector with one-way valves with a water inlet pipe and a water return pipe of the copper alloy mold, and opening a cooling water pump to cool the copper alloy mold;

s400, starting a workbench, and moving the water-cooled copper alloy tool fixed with the reclamation knife to be processed to a deposition station;

s500, installing a laser cladding head on a mechanical arm, aligning to the cutting edge of the reclamation knife to be processed, opening the laser cladding head, swinging the laser cladding head along the cutting edge of the reclamation knife to be processed, enabling the axis of the cladding laser head to be always perpendicular to the surface of the cutting edge of the reclamation knife to be processed, and matching with the movement of a workbench until the iron-based alloy coating is finished at the cutting edge of the reclamation knife to be processed in a cladding mode; and

s600, closing the laser cladding head, stopping powder feeding, starting a vertically and horizontally moving workbench, and transversely moving the cladding-finished reclamation knife and the water-cooled copper alloy tool to a disassembly station to take down the finished reclamation knife.

Technical Field

The invention relates to a reclamation farm tool, in particular to a reclamation knife and a device and a method for preparing a wear-resistant coating thereof.

Background

The reclamation knife is a main farm tool for hilling, and is directly contacted and rubbed with soil and sand and stones in the operation process, so that the reclamation knife is seriously abraded. In addition, during the ridging, collision with stones in the soil is inevitable, causing breakage of the reclamation blades. Therefore, the reclamation knife is required to have high hardness and good toughness. The 65Mn steel reclamation knife commonly used in the prior art has limited wear resistance and can not meet the requirement of current agricultural high-horsepower mechanical tillage. The production efficiency of the surface coating preparation technology such as spray remelting and the like commonly used in the prior art is far lower than that of a reclamation knife, the cost is high, and the surface coating preparation technology cannot be applied in batches.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a reclamation knife and a wear-resistant coating preparation device and method thereof aiming at the defects in the prior art.

In order to achieve the purpose, the invention provides a reclamation knife which comprises a knife body and a cutting edge arranged on one side of the knife body, wherein the tail part of the knife body is a straight line part, the head part of the knife body is an arc part, and the cutting edge is positioned on one side of the arc part, wherein the cutting edge is coated with a wear-resistant coating, and the wear-resistant coating is an iron-based alloy coating and has a martensite structure with vanadium carbide hard phases distributed in a dispersed mode.

The reclamation knife comprises a wear-resistant coating, wherein the wear-resistant coating is a high-hardness spherical VC hard phase contained in a martensite structure coating matrix, the hardness of the martensite structure coating matrix is HRC 60-65, and the Vickers hardness of the VC hard phase in spherical dispersion distribution in the martensite structure coating matrix is Hv 2800.

In order to better achieve the above objects, the present invention also provides a wear-resistant coating preparation apparatus of a reclamation knife, comprising:

the water-cooling copper alloy tool comprises a supporting body and a copper alloy clamping fixture installed on the supporting body, wherein a water inlet joint and a water outlet joint are arranged on the copper alloy clamping fixture, a water inlet pipe and a water return pipe are arranged in the copper alloy clamping fixture, the water inlet pipe and the water return pipe are respectively connected with a cooling water pump through the water inlet joint and the water outlet joint, the top surface of the copper alloy clamping fixture is matched with the circular arc part of the reclamation knife, and the top surface of the supporting body is matched with the straight line part of the reclamation knife; and

deposit the laser head, correspond set up in copper alloy mould top, it is being fixed in to deposit the laser head be used for the blade surface deposit wear-resistant coating of the reclamation sword on the water-cooling copper alloy frock, wear-resistant coating is iron-based alloy coating, iron-based alloy coating has the martensite tissue of vanadium carbide stereoplasm phase dispersion.

The wear-resistant coating preparation device of the reclamation knife is characterized in that the iron-based alloy coating is iron-based alloy powder with the granularity ranging from 53 micrometers to 180 micrometers.

The above apparatus for preparing wear-resistant coating of reclamation knife, wherein the iron-based alloy powder comprises the following components by weight percent except for Fe: 2.0-2.5% of C, 6-8% of V, 5.0-6.5% of Cr, less than 0.9% of Si and 4.0% of auxiliary materials, wherein the iron-based alloy powder is deposited by laser scanning of the deposition laser head to form a martensite structure with a dispersed VC hard phase.

The wear-resistant coating preparation device of the reclamation knife is characterized in that the deposition laser head scans the iron-based alloy coating with the deposition width of 15-20 mm and the thickness of 1.0-1.5 mm.

The wear-resistant coating preparation facilities of foretell reclamation sword, wherein, the cladding laser head uses 16mm 6 mm's rectangle facula scanning cladding, the laser power of cladding laser head is 4.5 KW.

Foretell reclamation sword's wear-resistant coating preparation facilities, wherein, deposit the laser head and install on the manipulator, follow treat the blade swing of processing reclamation sword, just the axis of depositing the laser head is perpendicular to all the time treat the surface of processing reclamation sword's circular arc portion.

The above-mentioned wear-resistant coating preparation facilities of reclamation sword, wherein, water inlet joint and water outlet joint are the quick-operation joint of taking the check valve respectively.

In order to better achieve the above objects, the present invention also provides a method for preparing a wear-resistant coating of a reclamation knife, wherein the method comprises the following steps:

s100, fixing the tail straight part of a reclamation knife to be processed on a support body of a water-cooling copper alloy tool, fixing the head circular arc part of the reclamation knife on a copper alloy clamping fixture of the water-cooling copper alloy tool by using a pressing plate, and tightly attaching the circular arc part of the reclamation knife to the circular arc top surface of the copper alloy clamping fixture;

s200, mounting the water-cooling copper alloy tool on a workbench, wherein the water-cooling copper alloy tool can move vertically and horizontally under the driving of the workbench;

s300, respectively connecting a water inlet connector and a water outlet connector with one-way valves with a water inlet pipe and a water return pipe of the copper alloy mold, and opening a cooling water pump to cool the copper alloy mold;

s400, starting a workbench, and moving the water-cooled copper alloy tool fixed with the reclamation knife to be processed to a deposition station;

s500, installing a laser cladding head on a mechanical arm, aligning to the cutting edge of the reclamation knife to be processed, opening the laser cladding head, swinging the laser cladding head along the cutting edge of the reclamation knife to be processed, enabling the axis of the cladding laser head to be always perpendicular to the surface of the cutting edge of the reclamation knife to be processed, and matching with the movement of a workbench until the iron-based alloy coating is finished at the cutting edge of the reclamation knife to be processed in a cladding mode; and

s600, closing the laser cladding head, stopping powder feeding, starting a vertically and horizontally moving workbench, and transversely moving the cladding-finished reclamation knife and the water-cooled copper alloy tool to a disassembly station to take down the finished reclamation knife.

The invention has the technical effects that:

the reclamation tool has higher toughness and hardness, can not break even if colliding with stones in the tillage process, has excellent wear resistance and impact resistance, and the preparation of the wear-resistant coating is very suitable for strengthening soil-entering parts such as reclamation knives, improves the wear resistance and prolongs the service life by more than one time.

The invention is described in detail below with reference to the drawings and specific examples, but the invention is not limited thereto.

Drawings

FIG. 1 is a schematic view of a reclamation knife according to an embodiment of the present invention;

FIG. 2 is a view of the attachment of FIG. 1;

FIG. 3 is a cross-sectional view A-A of FIG. 2;

FIG. 4 is a schematic view of the reclamation knife wear-resistant coating organization of one embodiment of the present invention;

FIG. 5 is a schematic structural view of a device for preparing a wear-resistant coating of a reclamation knife according to an embodiment of the invention;

fig. 6 is a sectional view B-B of fig. 5.

Wherein the reference numerals

1 reclamation knife

11 cutter body

12 cutting edge

13 straight line part

14 arc part

15 wear resistant coating

16VC hard phase

17 martensite structure coating substrate

2 water-cooling copper alloy frock

21 support body

22 copper alloy mould

23 pressing plate

24 water inlet joint

25 water outlet joint

3 deposition laser head

Detailed Description

The invention will be described in detail with reference to the following drawings, which are provided for illustration purposes and the like:

referring to fig. 1 to 3, fig. 1 is a schematic structural view of a reclamation knife 1 according to an embodiment of the present invention, fig. 2 is a view of fig. 1, and fig. 3 is a sectional view of fig. 2 a-a. The reclamation knife 1 can be used as a special knife for agricultural machinery, the reclamation knife 1 comprises a knife body 11 and a cutting edge 12 arranged on one side of the knife body 11, the tail part of the knife body 11 is a straight line part 13, the head part of the knife body 11 is an arc part 14, the cutting edge 12 is positioned on one side of the arc part 14, the cutting edge 12 is coated with a wear-resistant coating 15, the wear-resistant coating 15 is an iron-based alloy coating, and the wear-resistant coating has a martensite structure coating matrix 17 with vanadium carbide hard phases distributed in a dispersed mode.

Referring to fig. 4, fig. 4 is a schematic structural view of the wear-resistant coating 15 of the reclamation knife 1 according to an embodiment of the present invention. The wear-resistant coating 15 of the embodiment is a high-hardness spherical VC hard phase 16 of a martensitic structure coating matrix 17, the hardness of the martensitic structure coating matrix 17 is HRC 60-65, and the Vickers hardness of the VC hard phase 16 which is in spherical dispersion distribution in the martensitic structure coating matrix 17 is Hv 2800.

Referring to fig. 5 and 6, fig. 5 is a schematic structural view of a reclamation knife wear-resistant coating preparation device according to an embodiment of the present invention, and fig. 6 is a sectional view of fig. 5 taken along line B-B. The reclamation knife wear-resistant coating preparation device of the invention can be used for preparing the wear-resistant coating 15 of the reclamation knife 1, and comprises the following components: the water-cooling copper alloy tool 2 comprises a support body 21 and a copper alloy clamping fixture 22 installed on the support body 21, wherein a water inlet connector 24 and a water outlet connector 25 are arranged on the copper alloy clamping fixture 22, the water inlet connector 24 and the water outlet connector 25 are respectively preferably quick connectors with one-way valves, the quick connectors can be quickly plugged and pulled out and do not leak water, a water inlet pipe and a water return pipe are arranged in the copper alloy clamping fixture 22, the water inlet pipe and the water return pipe are respectively connected with a cooling water pump through the water inlet connector 24 and the water outlet connector 25, the top surface of the copper alloy clamping fixture 22 is matched with the circular arc portion 14 of the reclamation knife 1, and the top surface of the support body 21 is matched with the straight portion 13 of the reclamation knife 1; and cladding laser head 3, correspond set up in copper alloy mould 22 top, cladding laser head is used for being fixed in cutting edge 12 surface cladding wear-resistant coating 15 of reclamation sword 1 on the water-cooling copper alloy frock 2, wear-resistant coating 15 is the iron-based alloy coating, the iron-based alloy coating has the martensite tissue of vanadium carbide stereoplasm phase dispersion. This deposit laser head 3 mountable is scribbled the blade 12 of reclamation sword 1 on manipulator or other steerable anchor clamps that stretch out and draw back, follows the blade 12 swing of reclamation sword 1 is waited to process, just the axis of depositing laser head 3 is perpendicular to all the time the surface of waiting to process the circular arc portion 14 of reclamation sword 1.

Wherein the iron-based alloy coating adopts iron-based alloy powder with the granularity range of 53-180 mu m. The iron-based alloy powder preferably comprises the following components in percentage by weight except Fe: 2.0-2.5% of C, 6-8% of V, 5.0-6.5% of Cr, less than 0.9% of Si and 4.0% of auxiliary materials, and the iron-based alloy powder is deposited by the laser scanning of the deposition laser head 3 to form a martensite structure coating matrix 17 with the VC hard phase 16 in dispersed distribution. The deposition laser head 3 scans the iron-based alloy coating with the deposition width of 15 mm-20 mm and the thickness of 1.0 mm-1.5 mm. The deposition laser head 3 preferably scans the deposition using a rectangular spot of 16mm by 6mm, the laser power of the deposition laser head 3 preferably being 4.5 KW.

The preparation method of the wear-resistant coating 15 of the reclamation knife 1 comprises the following steps:

step S100, fixing a tail straight line part 13 of a reclamation knife 1 to be processed on a support body 21 of a water-cooling copper alloy tool 2 through screws, fixing a head circular arc part 14 of the reclamation knife 1 on a copper alloy clamping fixture 22 of the water-cooling copper alloy tool through a pressing plate 23, and tightly attaching the circular arc part 14 of the reclamation knife 1 to a circular arc top surface of the copper alloy clamping fixture 22;

step S200, installing the water-cooling copper alloy tool 2 on a workbench, wherein the water-cooling copper alloy tool 2 can move vertically and horizontally under the driving of the workbench;

step S300, connecting a water inlet connector 24 and a water outlet connector 25 with one-way valves with a water inlet pipe and a water return pipe of the copper alloy mold 22 respectively, and opening a cooling water pump to cool the copper alloy mold 22;

step S400, starting a workbench which moves vertically and horizontally, and moving the water-cooling copper alloy tool fixed with the reclamation knife 1 to be processed to a deposition station;

step S500, mounting the high-efficiency laser cladding head on a manipulator, aligning the high-efficiency laser cladding head with the cutting edge 12 of the reclamation knife 1 to be processed, and is vertical to the surface of the arc part 14 of the reclamation knife 1, the laser cladding head is opened, the laser cladding head swings along the cutting edge 12 of the reclamation knife 1 to be processed, and is always vertical to the cutting edge 12 of the reclamation knife 1 to be processed to reach a set radian, a first VC-containing hard phase 16 iron-based alloy coating with the width of 15-20 mm and the thickness of 1.0-1.5 mm is deposited, a worktable moves longitudinally for 15mm, a mechanical hand drives a laser deposition head to reversely rotate along an arc part 14 of the reclamation knife 1 to the initial position of the end part of the reclamation knife 1, a second VC-containing hard phase 16 iron-based alloy coating with the width of 15-20 mm and the thickness of 1.0-1.5 mm is deposited, moving a matching workbench until the welding of the cutting edge 12 of the reclamation knife 1 to be processed is completed by the iron-based alloy coating; and

and S600, closing the laser cladding head, stopping powder feeding, starting a vertically and horizontally moving workbench, and transversely moving the cladding-finished reclamation knife 1 and the water-cooled copper alloy tool 2 to a disassembly station to take down the finished reclamation knife 1.

And then, continuously installing the next reclamation knife 1 to be processed on the water-cooled copper alloy tool 2. Can set up a plurality of water-cooling copper alloy frocks 2, set up respectively on preparing, depositing and dismantling the station, can circulate and prepare, deposit and dismantle work, prepare the wear-resisting coating 15 of reclaimed knife 1 iron-based alloy fast.

The invention adopts a high-efficiency laser deposition technology and a water-cooled copper alloy tool 2, the high-efficiency laser line of a deposition laser head 3 scans and is fixed at the position of a cutting edge 12 of a reclamation knife 1 on the water-cooled copper alloy tool 2, the surface of the cutting edge 12 is deposited with a low-cost iron-based alloy material containing VC hard phase 16, and an iron-based alloy coating with a martensite structure coating matrix 17 with the vanadium carbide hard phase distributed in a dispersed manner is formed on the cutting edge 12 of the reclamation knife 1. The obtained coating matrix is the wear-resistant coating 15 containing the high-hardness spherical VC hard phase 16 with a martensite structure, the matrix hardness reaches HRC 60-65, the VC hard phase 16 is in spherical dispersion distribution in the martensite structure, and the Vickers hardness reaches Hv 2800. The VC hard phase 16-containing iron-based alloy coating with the width of 15-20 mm and the thickness of 1.0-1.5 mm can be deposited once by high-efficiency laser line scanning, the preparation of the wear-resistant coating 15 of the cutting edge 12 of the reclamation knife 1 can be completed within 1 minute, after iron-based alloy powder is deposited by laser line scanning, the iron-based alloy coating with the VC hard phase 16 in a dispersed distribution can be rapidly prepared at the position of the cutting edge 12 of the reclamation knife 1, the deformation of the cutting edge 12 of the reclamation knife 1 caused by coating strengthening preparation is avoided, the obtained wear-resistant coating 15 has a martensite structure with the VC hard phase 16 in a dispersed distribution, and the wear-resistant coating has excellent wear resistance and shock resistance, is very suitable for strengthening of soil-entering parts such as the reclamation knife 1, improves the wear resistance, and greatly prolongs the service life of the reclamation knife 1.

The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.