CN110218998B - Method for preparing self-sharpening cutter based on laser cladding treatment of surface of cutter blade - Google Patents
Method for preparing self-sharpening cutter based on laser cladding treatment of surface of cutter blade Download PDFInfo
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- CN110218998B CN110218998B CN201910548870.5A CN201910548870A CN110218998B CN 110218998 B CN110218998 B CN 110218998B CN 201910548870 A CN201910548870 A CN 201910548870A CN 110218998 B CN110218998 B CN 110218998B
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- 238000005253 cladding Methods 0.000 claims abstract description 66
- 238000005520 cutting process Methods 0.000 claims abstract description 50
- 239000000956 alloy Substances 0.000 claims abstract description 42
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 42
- 230000008569 process Effects 0.000 claims abstract description 31
- 239000002994 raw material Substances 0.000 claims abstract description 17
- 238000000227 grinding Methods 0.000 claims abstract description 10
- 238000007781 pre-processing Methods 0.000 claims abstract description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 34
- 239000000463 material Substances 0.000 claims description 21
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 claims description 14
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims description 14
- 229910052759 nickel Inorganic materials 0.000 claims description 13
- 238000000498 ball milling Methods 0.000 claims description 12
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- 229910052758 niobium Inorganic materials 0.000 claims description 4
- 238000005498 polishing Methods 0.000 claims description 4
- 239000010936 titanium Substances 0.000 claims description 4
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
- C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
- C22C19/058—Alloys based on nickel or cobalt based on nickel with chromium without Mo and W
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
- C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
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Abstract
The invention discloses a method for preparing a self-sharpening cutter based on surface laser cladding treatment at the cutting edge of the cutter, which comprises the following steps: (1) preprocessing a cutter; (2) forming a cladding layer on the surface of one side of the edge of the pretreated cutter by using self-fluxing alloy powder as a raw material through a laser cladding process; the laser cladding process specifically comprises the following steps: the cladding power is 1400-1600W, the powder feeding speed is 1.4r/min, the scanning speed is 0.03m/s, and the spot diameter of the laser is 3.5 mm. The autogenous grinding cutter prepared by the method has the advantages of high bonding strength of the laser cladding layer and the matrix, good abrasion resistance of the cladding layer and no cracking and softening of the lap joint area. Because one of them surface at the cutting edge has set up the cladding layer, makes the degree of wear on two surfaces of cutting edge different to lead to the cutting edge to grind sharper more, reach the effect from the sharpening, improved the life of cutter greatly.
Description
Technical Field
The invention relates to the technical field of agricultural machinery, in particular to a method for preparing a self-sharpening cutter based on surface laser cladding treatment at the cutting edge of the cutter.
Background
The application of the cutter in the agricultural field is very wide, such as a common plough share in ploughing, a mower for mowing, a harvester for grain harvesting and the like. However, the agricultural cutter is easily damaged after being used for a long time, so that the working efficiency of the agricultural machine is reduced, and the development of agriculture is influenced.
At present, agricultural cutters at home and abroad are mainly made of single metal materials, and domestic cutters generally have the problems of low hardness and wear resistance and short service life, and can not be used continuously due to serious abrasion; when the imported cutter is used in China, due to the fact that sundries such as stones and metal in cultivated land are more, the cutter is brittle, and the cutter beating phenomenon is more generated, so that the use is affected. The damage of the cutter is mostly concentrated at the position of the cutting edge, and the phenomena of passivation, serious abrasion, even notch and the like often occur at the position of the cutting edge. The cutter replacement each time is time-consuming and labor-consuming, and the working efficiency is seriously influenced.
In the traditional process, the blade is only subjected to quenching treatment, so that the rigidity, hardness, wear resistance, fatigue strength, toughness and the like of the cutter are improved, but the hardness, wear resistance and the like of the cutter still do not meet the requirements for the complex environment in farmland.
In order to improve the service life and the cutting performance of the cutter, since the last 50 century, a self-sharpening cutter appeared, and the basic principle is as follows: the blade adopts special design or process, so that the cutting edge with proper thickness protrudes out of the front edge due to different abrasion amounts generated by soil or crops on two edge surfaces of the blade during operation, and the sharper cutting performance is kept for a longer time. Therefore, the self-sharpening is formed by different abrasion degrees of two cutting edges in the working process of the blade, and in terms of material design, the difference of abrasion amount caused by the hardness change of the cutting edge section is the main means for forming the self-sharpening. At present, the strengthening measures for self-sharpening of the agricultural machinery cutter at home and abroad mainly focus on the material design aspect, but still have a plurality of problems, such as: the sectional hardness, the structure and the components of the self-sharpening cutting edge are not changed in a gradient manner, the bonding strength between different alloy layers is low, and the self-sharpening cutting edge is easy to crack and peel in the using process, so that the using effect is influenced; the proportion of the wear rate of the hardened layer of the cutting edge and the base material is not well controlled, if the base material is worn quickly, the wear-resistant layer of the cutting edge is protruded, the cutting edge is very easy to break due to high hardness and poor toughness, if the wear-resistant layer is thin, the good self-sharpening effect is difficult to obtain after the wear, and in addition, the deformation of the blade is also caused in the self-sharpening processing and strengthening process. Therefore, how to prepare the cutter with long service life and good self-sharpening effect is still the current technical problem.
The laser cladding treatment is a process method for cladding alloy powder on the surface of a blade or a part by using laser beams to form a hardened layer. The depth of the laser beam acting on the surface layer of the base material is shallow, the acting time is short, and the deformation of the workpiece is small compared with other methods. However, the problems of poor bonding property of the cladding layer and the substrate, poor wear resistance of the cladding layer, easy cracking and softening of a heat affected zone are main problems restricting the application of the laser cladding process in the preparation of the self-sharpening cutter, and the current self-sharpening cutter prepared by the laser cladding process is rarely reported.
Disclosure of Invention
Aiming at the prior art, the invention aims to provide a method for preparing a self-sharpening cutter based on surface laser cladding treatment at the cutting edge of the cutter. The autogenous grinding cutter prepared by the method has the advantages of high bonding strength of the laser cladding layer and the matrix, good abrasion resistance of the cladding layer and no cracking and softening of the lap joint area. Because one of them surface at the cutting edge has set up the cladding layer, makes the degree of wear on two surfaces of cutting edge different to lead to the cutting edge to grind sharper more, reach the effect from the sharpening, improved the life of cutter greatly.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect of the invention, a method for preparing a self-sharpening tool based on surface laser cladding treatment at the cutting edge of the tool is provided, which comprises the following steps:
(1) preprocessing a cutter;
(2) forming a cladding layer on the surface of one side of the edge of the pretreated cutter by using self-fluxing alloy powder as a raw material through a laser cladding process; the laser cladding process specifically comprises the following steps:
the cladding power is 1400-1600W, the powder feeding speed is 1.4r/min, the scanning speed is 0.03m/s, and the spot diameter of the laser is 3.5 mm.
Preferably, in step (1), the pretreatment method is: cleaning and polishing the area to be clad at the cutting edge of the cutter, and removing residual dust, oil stains and oxide layers on the surface of the area to be clad to expose fresh metal.
Preferably, in the step (2), the self-fluxing alloy powder is prepared from nickel-based alloy powder, tungsten carbide powder and titanium carbide powder in a weight ratio of (8-10): (2-4): (1-2). Wherein:
the nickel-based alloy powder comprises the following raw materials in percentage by mass:
cr: 15%, B: 3.2%, Si: 4%, Fe: 8%, C: 0.4 percent, and the balance being Ni;
the tungsten carbide powder comprises the following raw materials in percentage by mass:
c: 8-12%, Fe: 0.06-0.08%, and the balance of W.
The titanium carbide powder comprises the following raw materials in percentage by mass:
c: 20-24%, Al: 0.04-0.08%, Nb: 1-3% and the balance Ti.
The self-fluxing alloy powder is prepared from nickel-based alloy powder, tungsten carbide powder and titanium carbide powder according to a certain weight ratio, wherein:
the Ni-based alloy powder has toughness, impact resistance and corrosion resistance, and the Ni-based self-fluxing alloy has good wettability, so that the wettability of a base material and a cladding layer reinforcing phase is enhanced, and the metallurgical bonding property of a machine body and a cladding layer is improved; b, Si in the Ni-based alloy powder can obviously reduce the melting point of the alloy, enlarge the solid-liquid phase line temperature zone, form eutectic with low melting point, strengthen the hardness of the cladding layer, facilitate deoxidation and slagging, degas and improve the surface quality of the cladding layer; cr can play a role in solid solution strengthening, improve the corrosion resistance and the high-temperature oxidation resistance, and can form a hard phase with C, B so as to improve the hardness and the wear resistance of the alloy.
The tungsten carbide powder has the characteristics of high melting point, high hardness and lower free energy of generation; the titanium carbide powder has the characteristics of extremely high wear resistance and good diffusion resistance; the nickel-based alloy powder, the tungsten carbide powder and the titanium carbide powder are compounded for use, so that the dispersion strengthening effect and the heterogeneous nucleation effect can be achieved, and the formed cladding layer has the advantages of high hardness, wear resistance, certain high temperature resistance and the like.
Further, the self-fluxing alloy powder further comprises a step of ball milling before laser cladding, wherein the ball milling specifically comprises the following steps: putting the nickel-based alloy powder, the tungsten carbide powder and the titanium carbide powder into a ball milling tank according to the weight ratio, sealing and vacuumizing, and then introducing argon gas for ball milling for 4-6 hours.
Preferably, the size of the self-fluxing alloy powder after ball milling treatment is 200-300 meshes.
The self-fluxing alloy powder can be continuously extruded by collision in the ball milling process, the particle diameter is continuously reduced, particularly the brittle TiC particles are refined and can be uniformly distributed in the cladding layer tissue after cladding; after ball milling, the self-fluxing alloy powder particles are reduced in particle size and increased in surface energy continuously, the activity is increased in the cladding process, compact tissues are easy to form, and the defects of shrinkage porosity, air holes and the like are reduced.
Preferably, the thickness of the cladding layer is 0.4-0.5 mm.
In a second aspect of the invention, there is provided a autogenous grinding blade prepared by the above method.
Preferably, a cladding layer is arranged on one side surface of the cutting edge of the autogenous grinding cutter, and the ratio of the thickness of the cladding layer to the thickness of the base material of the cutter base body is 1: (4-6).
Preferably, the autogenous grinding cutter material is 65 Mn.
The proportion of the wear rate of blade sclerosis layer and base member mother metal can influence the self-sharpening effect of cutter, if the wearing and tearing of base member mother metal are fast, blade wearing layer is outstanding, because hardness high toughness is poor and very easily the tipping, if the wearing layer is thin, be difficult to obtain good self-sharpening effect after wearing and tearing. Through tests, the ratio of the thickness of the cladding layer to the thickness of the base material of the cutter base body is controlled to be 1: (4-6), the self-sharpening effect is optimal.
The invention has the beneficial effects that:
(1) the invention adopts the laser cladding process to process one side surface of the cutting edge of the cutter, so as to form a cladding layer, the hardness of the cladding layer material is higher relative to the base parent metal, along with the continuous use of the cutter, the surface of the cutting edge without the cladding layer is gradually worn and falls off due to lower wear resistance, and the surface of the cutting edge with the cladding layer is slightly worn due to higher wear resistance, so that the process is repeated, the cutting edge is sharper due to different degrees of wear of the two side surfaces of the cutting edge, and the effect of self-sharpening the cutting edge is achieved.
(2) The invention optimizes the composition of self-fluxing alloy powder and a laser cladding process, and the cladding layer prepared by the method has high hardness, good wear resistance, high bonding strength with a substrate, and no cracking and softening problems of a lap joint area.
(3) The invention optimizes the thickness ratio of the cladding layer to the base material of the matrix, and obviously improves the self-sharpening effect of the cutter.
Drawings
FIG. 1: the embodiment of the application provides a schematic flow chart of a method for laser cladding of the surface of a cutter blade.
FIG. 2: the structure schematic diagram of the cutter after the surface laser cladding treatment at the cutting edge of the cutter provided by the embodiment of the application; in the figure, 1-cutter body, 2-cladding line, 3-bolt hole, 4-blade.
FIG. 3: microstructure topography of the cladding layer.
FIG. 4: microstructure topography of the cladding layer and substrate bonding area.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
As introduced in the background art, the strengthening measures for self-sharpening of agricultural machinery cutters at home and abroad mainly focus on the material design aspect, but still have many problems, and how to prepare cutters with long service life and good self-sharpening effect is still the current technical problem.
The preparation of the self-sharpening cutter mainly realizes the difference of abrasion loss caused by the hardness change of the section of the cutting edge, and in order to realize the change of the material hardness, the prior art mainly adopts surface strengthening processes such as chemical heat treatment, surfacing, spraying, cladding and the like to obtain the cutting edge with different surface and inside hardness.
For laser cladding treatment, the problems of poor bonding property of a cladding layer and a substrate, poor wear resistance of the cladding layer, easy cracking and softening of a heat affected zone are main problems for restricting the application of a laser cladding process in the preparation of a self-sharpening tool. The laser cladding process and the material composition of the self-fluxing alloy powder are two important factors influencing the quality of a cladding layer. For agricultural machinery, particularly blades of lawn mowers are thin and easy to deform under high-temperature heating, laser cladding of alloy powder is difficult, on one hand, a selected base material and a cladding layer material need to have good wettability, on the other hand, a laser cladding process method needs to be proper, and proper laser parameters need to be adjusted for processing so as to prevent defects such as air holes, cracks, splashing and the like of the cladding layer, namely blades and blades from deforming.
Based on this, the invention aims to provide a method for preparing a self-sharpening tool based on surface laser cladding treatment at the edge of the tool.
In one embodiment of the present invention, a method of making a self-sharpening tool is provided comprising the steps of:
(1) preprocessing a cutter: cleaning and polishing the area to be clad at the cutting edge of the cutter, and removing dirt such as dust, oil stain, oxide layer and the like remained on the surface of the area to be clad to expose fresh metal; the grinding mode can be sand paper grinding or mechanical grinding.
(2) Forming a cladding layer on the surface of one side of the edge of the pretreated cutter by using self-fluxing alloy powder as a raw material through a laser cladding process;
the self-fluxing alloy powder is prepared from nickel-based alloy powder, tungsten carbide powder and titanium carbide powder in a weight ratio of (8-10): (2-4): (1-2); wherein:
the nickel-based alloy powder comprises the following raw materials in percentage by mass:
cr: 15%, B: 3.2%, Si: 4%, Fe: 8%, C: 0.4 percent, and the balance being Ni;
the tungsten carbide powder comprises the following raw materials in percentage by mass:
c: 8-12%, Fe: 0.06-0.08%, and the balance of W.
The titanium carbide powder comprises the following raw materials in percentage by mass:
c: 20-24%, Al: 0.04-0.08%, Nb: 1-3% and the balance Ti.
The laser cladding process specifically comprises the following steps:
the cladding power is 1400-1600W, the powder feeding speed is 1.4r/min, the scanning speed is 0.03m/s, and the spot diameter of the laser is 3.5 mm.
In the method, the raw material composition of the self-fluxing alloy powder and the laser cladding process are optimized, so that the quality of the cladding layer and the self-sharpening effect of the cutter are obviously improved. Wherein: the invention selects nickel-based alloy powder, tungsten carbide powder and titanium carbide powder to prepare self-fluxing alloy powder according to specific weight ratio, and ensures high hardness and high wear resistance of a cladding layer by high hard phase content.
The cladding process parameters can influence the surface quality and performance of a cladding layer, if the laser cladding power is too low, the Ni-based alloy is insufficiently heated and is not completely melted, so that a large number of air holes are generated on the surface, the cladding layer is high in brittleness, cracks are easy to generate, and the metallurgical bonding with a matrix is poor; if the laser cladding power is too high, the hardness of a cladding layer is reduced, a heat affected zone is enlarged, and the blade is greatly deformed. The diameter of a laser spot is too small, so that the overlapping quantity between two adjacent tracks is too large, the surface quality of a cladding layer is reduced, and a large number of air hole defects exist; if the diameter of a laser spot is too large, the overlapping amount between two cladding tracks is too small, the alloy powder coating is insufficiently heated at the overlapping part, the bonding with the matrix is not ideal, pores appear at the overlapping part, the coating is high in brittleness, the quality of the surface of the cladding layer is reduced, and cracks are easily generated. The experiment shows that the laser cladding process comprises the following steps: the cladding power is 1400-1600W, the powder feeding speed is 1.4r/min, the scanning speed is 0.03m/s, and the spot diameter of the laser is 3.5mm, so that the surface quality and the performance of the cladding layer are optimal.
In order to make the technical solutions of the present application more clearly understood by those skilled in the art, the technical solutions of the present application will be described in detail below with reference to specific embodiments.
The test materials used in the examples of the present invention are all conventional in the art and commercially available. Wherein:
example 1: self-sharpening cutter prepared based on laser cladding treatment of surface of cutter blade
A schematic flow chart of a method for laser cladding a surface at a cutting edge of a cutter is shown in fig. 1, and the method comprises the following steps:
s101: and removing oil stains on the selected knife edge of the knife by using acetone and drying the knife edge, and polishing the knife edge of the knife by using sand paper or other methods until fresh metal is exposed.
S102: the cutter is placed in laser cladding equipment, the cutting edge of the cutter is firstly placed horizontally, and then the cutter is fixed so as to be conveniently positioned.
S103: and setting laser cladding parameters for laser cladding.
The self-fluxing alloy powder adopted by laser cladding is prepared from nickel-based alloy powder, tungsten carbide powder and titanium carbide powder in a weight ratio of 10: 3: 2, preparing a composition; wherein:
the nickel-based alloy powder comprises the following raw materials in percentage by mass:
cr: 15%, B: 3.2%, Si: 4%, Fe: 8%, C: 0.4 percent, and the balance being Ni;
the tungsten carbide powder comprises the following raw materials in percentage by mass:
c: 10%, Fe: 0.07% and the balance W.
The titanium carbide powder comprises the following raw materials in percentage by mass:
c: 22%, Al: 0.06%, Nb: 2 percent and the balance of Ti.
The laser cladding process specifically comprises the following steps:
the cladding power is 1600W, the powder feeding speed is 1.4r/min, the scanning speed is 0.03m/s, and the spot diameter of the laser is 3.5 mm.
The cutter processed by the method is shown in FIG. 2, and the cutter material is 65 Mn. As can be seen from fig. 2, the tool comprises: the cutter body 1, the cutter body 1 takes the form of the scallop structure; the cutting edge 4 is positioned on the arc side of the scallop structure of the cutter body 1, and the integral scallop structure of the cutter body 1 is favorable for increasing the length of the cutting edge; forming cladding lines 2 on the first surface of the blade 4 after laser cladding, wherein the cladding lines 2 are in fillet transition. Cladding line 2 can change the east China friction of part straw into rolling friction, has reduced the friction of straw to the cutter. Increase to melt and cover line 2 on the first surface of cutting edge 4 and not only improved the wearability of cutter, still improved the hardness and the corrosion resistance of the first surface of cutting edge 4, made the hardness of the first surface of cutting edge 4 be greater than the hardness of the second surface of cutting edge 4 to lead to the degree of wear of two sides about the cutting edge different, make the cutting edge sharper more the grinding, thereby reach the effect of self-sharpening. The first surface is the surface on any side of the blade 4, and is subjected to laser cladding treatment to form a cladding layer; the second surface is the surface of the blade edge 4 opposite the first surface.
The number of the bolt holes 3 is 4-6, and the bolt holes are uniformly formed in the cutter body 1. And internal threads are arranged in the bolt holes 3 and are used for being fixed with agricultural machinery through bolts.
The thickness of the cladding layer formed on the cutter of the embodiment is 0.4-0.5mm, the cladding layer has excellent surface quality, no cracks and high bonding strength with the base material. The microstructure of the cladding layer is shown in FIG. 3, and the microstructure of the bonding region of the cladding layer and the substrate is shown in FIG. 4.
Test example 1: frictional wear test
1. The test method comprises the following steps:
the wear resistance of the cladding sample in example 1 is detected by adopting a ring block type friction mode, the ring sample is 45 steel in a quenching state, and the outer diameter of a ring is 40.5 mm. The test is carried out on an MMS-2A microcomputer control friction wear testing machine, the rotating speed of an annular sample is 200r/min, the friction force is 100N, and the friction time of each sample is 0.5 h.
Before and after the rubbing test, the sample was washed with alcohol in an ultrasonic washer, the mass of the sample was weighed three times with a scale having an accuracy of 0.0001g, the average value was taken as the mass of the sample, and the mass loss rate of the sample before and after the rubbing was calculated.
2. And (3) test results:
the mass loss of the cladding sample prepared by the method of the embodiment 1 of the invention before and after the friction test is only 0.2mg, and the mass loss rate is only 0.002%. The abrasion resistance of the sample treated by the laser cladding process is obviously improved, the service performance of the cutter can be greatly improved, and the service life of the cutter is prolonged.
Test example 2:
the knife prepared in this example was compared with a commercially available knife manufactured according to the national standard (GB/T1209-2009) in an alfalfa cutting field test.
As a result, when the forage grass machine harvests alfalfa, the operation efficiency of the cutter prepared by the embodiment is improved by 34.2% and the oil consumption is reduced by 24.5% compared with the commercially available blade produced by the national standard, wherein the operation is carried out for 6 mu per hour.
After 1400 mu of operation, the cutter prepared by the embodiment still has sharp cutting performance, and the cutting stubble is level; and the cutting performance of the blade produced by the national standard after 1000 mu of operation is sharply reduced, and the cutting edge is seriously abraded.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (1)
1. A method for preparing a self-sharpening cutter based on surface laser cladding treatment at the cutter blade is characterized by comprising the following steps:
(1) preprocessing a cutter;
(2) forming a cladding layer on the surface of one side of the edge of the pretreated cutter by using self-fluxing alloy powder as a raw material through a laser cladding process; the laser cladding process specifically comprises the following steps:
the cladding power is 1400-1600W, the powder feeding speed is 1.4r/min, the scanning speed is 0.03m/s, and the spot diameter of the laser is 3.5 mm;
in the step (2), the self-fluxing alloy powder is prepared from nickel-based alloy powder, tungsten carbide powder and titanium carbide powder in a weight ratio of (8-10): (2-4): (1-2);
the nickel-based alloy powder comprises the following raw materials in percentage by mass:
cr: 15%, B: 3.2%, Si: 4%, Fe: 8%, C: 0.4 percent, and the balance being Ni;
the tungsten carbide powder comprises the following raw materials in percentage by mass:
c: 8-12%, Fe: 0.06-0.08%, and the balance of W;
the titanium carbide powder comprises the following raw materials in percentage by mass:
c: 20-24%, Al: 0.04-0.08%, Nb: 1-3% and the balance Ti;
the thickness of the cladding layer is 0.4-0.5mm, and the ratio of the thickness of the cladding layer to the thickness of the base material of the cutter base body is 1: (4-6);
in the step (1), the pretreatment method comprises the following steps: cleaning and polishing the area to be clad at the cutting edge of the cutter, and removing residual dust, oil stains and oxide layers on the surface of the area to be clad to expose fresh metal;
the self-fluxing alloy powder further comprises a step of ball milling before laser cladding, wherein the ball milling specifically comprises the following steps: putting nickel-based alloy powder, tungsten carbide powder and titanium carbide powder into a ball milling tank according to the weight ratio, sealing and vacuumizing, and then introducing argon for ball milling for 4-6h
The size of the self-fluxing alloy powder after ball milling treatment is 200-300 meshes;
the autogenous grinding cutter material is 65 Mn.
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| CN113305523A (en) * | 2020-07-07 | 2021-08-27 | 广东凯利德科技有限公司 | Production method of 300 series stainless steel kitchen cutter |
| CN111958048A (en) * | 2020-08-07 | 2020-11-20 | 湖州南浔博锐木工刀具有限公司 | Grinding and repairing device for woodworking threading tool production |
| CN112064015A (en) * | 2020-09-11 | 2020-12-11 | 阳江市佰伦实业有限公司 | 430 antibacterial stainless steel cladding cutter and preparation method thereof |
| CN113106450A (en) * | 2021-03-03 | 2021-07-13 | 泉州市双滢新材料科技有限公司 | Composite hard coating cutter and preparation method thereof |
| CN113118459B (en) * | 2021-04-20 | 2022-04-22 | 中南大学 | Method for preparing blade through low-temperature laser cladding and metal-based composite powder for 3D printing |
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| CN113737555A (en) * | 2021-09-04 | 2021-12-03 | 东北石油大学 | Novel high-efficient pulper waste paper board system of smashing |
| CN114559045B (en) * | 2022-03-01 | 2022-10-14 | 广东凯利德科技有限公司 | Method for producing austenitic stainless steel kitchen knife tool and low-carbon high-chromium martensite alloy powder |
| CN115482228B (en) * | 2022-09-26 | 2023-05-16 | 阳江市安佳源五金制品有限公司 | Preparation process for strengthening cutting edge by utilizing laser cladding technology |
| CN118563313A (en) * | 2024-07-31 | 2024-08-30 | 亚琛联合科技（天津）有限公司 | Extruder barrel wear-resistant alloy coating, laser cladding method and cladding gun head |
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| JPH0226667A (en) * | 1988-07-14 | 1990-01-29 | Mitsubishi Heavy Ind Ltd | Blade type coating machine |
| WO2011118784A1 (en) * | 2010-03-25 | 2011-09-29 | 地方独立行政法人大阪市立工業研究所 | Method for forming metal membrane |
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