CN110218998A - Based on the method that surface laser cladding processing prepares self-sharpening blade cutter at cutter blade - Google Patents
Based on the method that surface laser cladding processing prepares self-sharpening blade cutter at cutter blade Download PDFInfo
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- CN110218998A CN110218998A CN201910548870.5A CN201910548870A CN110218998A CN 110218998 A CN110218998 A CN 110218998A CN 201910548870 A CN201910548870 A CN 201910548870A CN 110218998 A CN110218998 A CN 110218998A
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- 238000000034 method Methods 0.000 title claims abstract description 40
- 238000004372 laser cladding Methods 0.000 title claims abstract description 18
- 238000012545 processing Methods 0.000 title claims abstract description 11
- 238000005253 cladding Methods 0.000 claims abstract description 71
- 239000000843 powder Substances 0.000 claims abstract description 70
- 238000000576 coating method Methods 0.000 claims abstract description 31
- 230000008018 melting Effects 0.000 claims abstract description 30
- 239000011159 matrix material Substances 0.000 claims abstract description 18
- 238000010309 melting process Methods 0.000 claims abstract description 17
- 239000002994 raw material Substances 0.000 claims abstract description 17
- 238000002203 pretreatment Methods 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 24
- 239000000956 alloy Substances 0.000 claims description 23
- 229910045601 alloy Inorganic materials 0.000 claims description 23
- 239000011248 coating agent Substances 0.000 claims description 14
- 238000002844 melting Methods 0.000 claims description 14
- 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 13
- 238000000498 ball milling Methods 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 9
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 238000005498 polishing Methods 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 4
- 239000010936 titanium Substances 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 239000000428 dust Substances 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims description 3
- 229910052786 argon Inorganic materials 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 229910000906 Bronze Inorganic materials 0.000 claims 1
- 239000010974 bronze Substances 0.000 claims 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 19
- 230000008569 process Effects 0.000 abstract description 7
- 238000005336 cracking Methods 0.000 abstract description 4
- 239000010410 layer Substances 0.000 description 54
- 238000005520 cutting process Methods 0.000 description 13
- 238000012360 testing method Methods 0.000 description 11
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- 239000002245 particle Substances 0.000 description 3
- 239000012071 phase Substances 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- 244000137852 Petrea volubilis Species 0.000 description 2
- 241000219793 Trifolium Species 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
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- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
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- 238000013329 compounding Methods 0.000 description 1
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- 238000011161 development Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
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- 238000005507 spraying Methods 0.000 description 1
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- 239000004575 stone Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- 238000010998 test method Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention discloses a kind of based on the method that surface laser cladding processing prepares self-sharpening blade cutter at cutter blade, comprising the following steps: (1) pre-processes to cutter；(2) using self-fluxing alloyed powder as raw material, by laser melting and coating process after the pre-treatment the blade of cutter a side surface formed cladding layer；The laser melting and coating process specifically: cladding power is 1400-1600W, the spot diameter of powder feed rate 1.4r/min, scanning speed 0.03m/s, laser is 3.5mm.The problem of bond strength of the self-sharpening blade cutter prepared using the method for the present invention, laser cladding layer and matrix is high, and the wearability of cladding layer is good, there is no cracking and overlap softenings.Due to being provided with cladding layer on one of surface of blade, keeps the degree of wear on two surfaces of blade different, the more grind the more sharp so as to cause blade, achieve the effect that self-sharpening blade, substantially increase cutting-tool's used life.
Description
Technical field
The present invention relates to agricultural machinery technological fields, and in particular to one kind is based on surface laser cladding processing at cutter blade
The method for preparing self-sharpening blade cutter.
Background technique
Cutter is very extensive in the application of agriculture field, such as common ploughshare when arable land, grass trimmer when mowing,
Cropper etc. used when grain harvest.But agricultural cutter can be easily damaged after by prolonged use, be reduced
The working efficiency of agricultural machinery, and then influence the development of agricultural.
Current agricultural cutter both domestic and external is still based on monometallic material, the generally existing hardness of domestic cutter, wearability
Problem not high, service life is shorter, Chang Yinwei serious wear and cannot be used continuously completely；And the cutter of import makes at home
Used time due in ploughing the sundries such as stone, metal it is more, cutter itself property is crisp, mostly occurs and forges a knife phenomenon and influence to use.Cutter
Damage be largely focused at blade in fact, can often occur passivation at blade, serious wear even phenomena such as notch occurs.
Replacement cutter is cumbersome and time consuming every time, seriously affects working efficiency.
Traditional technique at blade only by quenching treatment, although improve the rigidity of cutter, hardness, wearability,
Fatigue strength and toughness etc., but for the complex environment in arable land, hardness, wearability etc. still less meet the requirements.
There is self-sharpening cutter since the fifties in last century to improve the service life and cutting ability of cutter,
Basic principle is: blade uses special designing or technique, since soil or crops produce two blade surfaces of blade when being allowed to operation
Raw different abrasion loss, allows thickness cutting edge appropriate to protrude from forward position, the long period keeps sharp cutting performance.Thus may be used
See, self-sharpening be since two-edged surface wear degree is differently formed during blade work, for design of material, cutting edge section
Realize that firmness change causes abrasion loss difference to be the main means to form self-sharpening.Currently, both at home and abroad to agricultural machinery cutter self-sharpening blade
Enhancements be concentrated mainly on design of material in terms of, but there are still many problems, such as: it is hard for self-sharpening cutting edge section
Change of gradient is not implemented in degree, tissue and ingredient, and the bond strength of different-alloy interlayer is lower, and cracking, stripping are easy in use process
It falls, influences using effect；The bad control of the ratio of the wear rate of cutting edge hardened layer and matrix base material, if matrix base material quick abrasion,
Tool edge wear-proof layer protrusion, the easily tipping due to hardness high tenacity difference, is difficult to obtain excellent autogenous grinding if wearing layer is thin, after abrasion
In addition sharp effect can also cause the deformation of blade in self-sharpening processing and strengthening process.Therefore, how service life is prepared
Cutter long, that self-sharpening effect is good is still current technology problem.
Laser Cladding Treatment is that the cladding of cladding alloy powder is formed in it in blade or piece surface using laser beam
The process of hardened layer.The depth that laser beam acts on substrate surface layer is shallower, and the time of effect is very short, and workpiece deformation is with respect to it
His method is small.But cladding layer with matrix associativity is poor, cladding layer wears no resistance, softening problem easy to crack and heat affected area,
It is the main problem for restricting laser melting and coating process and being applied in preparing self-sharpening blade cutter, certainly currently with laser melting and coating process preparation
Sharpening cutter is also more rare to be had been reported that.
Summary of the invention
For the above-mentioned prior art, the object of the present invention is to provide one kind based on surface laser cladding processing at cutter blade
The method for preparing self-sharpening blade cutter.The self-sharpening blade cutter prepared using the method for the present invention, the combination of laser cladding layer and matrix
The problem of intensity is high, and the wearability of cladding layer is good, there is no cracking and overlap softenings.Due on one of surface of blade
Provided with cladding layer, keeps the degree of wear on two surfaces of blade different, the more grind the more sharp so as to cause blade, reach self-sharpening blade
Effect substantially increases cutting-tool's used life.
To achieve the above object, the present invention adopts the following technical scheme:
The first aspect of the present invention provides one kind based on surface laser cladding processing at cutter blade and prepares self-sharpening blade cutter
Method, comprising the following steps:
(1) cutter is pre-processed；
(2) using self-fluxing alloyed powder as raw material, pass through the side of the laser melting and coating process blade of cutter after the pre-treatment
Surface forms cladding layer；The laser melting and coating process specifically:
Cladding power is 1400-1600W, the hot spot of powder feed rate 1.4r/min, scanning speed 0.03m/s, laser
Diameter is 3.5mm.
Preferably, in step (1), the pretreated method are as follows: beat waiting for that cladding region clear up at cutter blade
Mill is removed to dust, greasy dirt and oxide layer remained on surface at cladding, it is made to expose fresh metal.
Preferably, in step (2), the self-fluxing alloyed powder is by Co-based alloy powder, tungsten-carbide powder and titanium carbide
Powder is (8-10) by weight: (2-4): (1-2) composition.Wherein:
By percentage to the quality, raw material forms the Co-based alloy powder are as follows:
Cr:15%, B:3.2%, Si:4%, Fe:8%, C:0.4%, surplus Ni；
By percentage to the quality, raw material forms the tungsten-carbide powder are as follows:
C:8-12%, Fe:0.06-0.08%, surplus W.
By percentage to the quality, raw material forms the titanium carbide powder are as follows:
C:20-24%, Al:0.04-0.08%, Nb:1-3%, surplus Ti.
The raw material composition of self-fluxing alloyed powder will have a direct impact on the performance of cladding layer, self-fluxing alloyed powder of the invention
It is to be formulated by Co-based alloy powder, tungsten-carbide powder and titanium carbide powder by certain weight ratio, in which:
Ni base alloy powder has toughness, shock resistance, corrosion resistance, and Ni base self-melting alloy wetability is good, has
Conducive to the wetability of enhancing base materials and cladding layer reinforced phase, body and cladding layer metallurgical bonding are improved；In Ni base alloy powder
B, Si can significantly reduce alloy melting point, expand solid-liquid phase line humidity province, form low melting eutectics body, have to the hardness of cladding layer
There is invigoration effect, also help deoxidation slag making, degasification, improves clad layer surface quality；Cr can play solution strengthening effect, mention
High-corrosion resistance and high temperature oxidation resistance can also form hard phase with C, B to improve alloy rigidity and wearability.
Tungsten-carbide powder has the characteristics that high-melting-point, high rigidity, free energy of formation are lower；Titanium carbide powder has high
Wearability and the good feature of anti-diffusivity；Co-based alloy powder, tungsten-carbide powder and titanium carbide powder are used in compounding, Ke Yiqi
To the effect of dispersion-strengtherning and the effect of heterogeneous forming core, the cladding layer to be formed is made to have hardness high, wear-resistant and certain resistance to
The feature performance benefits such as high temperature.
Further, the self-fluxing alloyed powder further includes the steps that ball milling, the ball milling tool before laser melting coating
Body are as follows: be placed in Co-based alloy powder, tungsten-carbide powder and titanium carbide powder in ball grinder by weight, sealing vacuumizes, so
After be passed through argon gas protection carry out ball milling, Ball-milling Time 4-6h.
Preferably, the size of the self-fluxing alloyed powder after ball-milling treatment is 200-300 mesh.
Self-fluxing alloyed powder during ball-milling treatment can continuous downthrust, particle diameter constantly reduces, especially
It is that brittle TiC particle will be refined, can be evenly distributed in microstructure of surface cladding layer after cladding；After ball milling, self-fluxing nature
Alloy powder particle can be continuously increased on surface while partial size reduces, and activity increases in cladding process, be easily formed densification
The presence of the defects of tissue, reduction shrinkage porosite, stomata.
Preferably, the cladding layer with a thickness of 0.4-0.5mm.
The second aspect of the present invention provides the self-sharpening blade cutter of above method preparation.
Preferably, a side surface of the self-sharpening blade cutter blade is equipped with cladding layer, the thickness and cutter of the cladding layer
The thickness ratio of matrix base material is 1:(4-6).
Preferably, the self-sharpening blade cutter material is 65Mn.
The ratio of the wear rate of cutting edge hardened layer and matrix base material will affect the self-sharpening blade effect of cutter, if matrix base material is ground
Damage is fast, tool edge wear-proof layer protrusion, and the easily tipping due to hardness high tenacity difference is difficult to obtain excellent if wearing layer is thin, after abrasion
Self-sharpening effect.It is found through experiment that by the thickness of the thickness of cladding layer and tool matrix base material than control in 1:(4-6),
Self-sharpening effect is optimal.
Beneficial effects of the present invention:
(1) present invention is handled a side surface of cutter blade using laser melting and coating process, forms cladding layer,
Relative to matrix base material, the hardness of cladding layer material is higher, and with continuing on for cutter, blade is not provided with one layer of cladding layer
Surface gradually wears out and falls off since wearability is lower, and the side surface that blade is equipped with cladding layer is ground since wearability is higher
Very little is damaged, so in cycles, since the degree of wear difference of blade both side surface causes blade the more to grind the more sharp, to reach
The effect of self-sharpening blade.
(2) present invention has carried out preferably, using the present invention side composition and laser melting and coating process of self-fluxing alloyed powder
The hardness of the cladding layer of method preparation is high, abrasion resistance properties are good, and cladding layer and the bond strength with matrix are high, and there is no cracking and
The problem of overlap softens.
(3) the thickness ratio of cladding layer and matrix base material is optimized in the present invention, significantly improves the self-sharpening of cutter
Effect.
Detailed description of the invention
Fig. 1: the method flow schematic diagram of surface laser cladding at a kind of cutter blade provided by the embodiments of the present application.
Fig. 2: the structure of surface laser cladding treated cutter is shown at a kind of cutter blade provided by the embodiments of the present application
It is intended to；In figure, 1- cutter hub, 2- cladding lines, 3- bolt hole, 4- blade.
Fig. 3: the microstructure morphology of cladding layer.
Fig. 4: the microstructure morphology of cladding layer and matrix bond area.
Specific embodiment
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
As background technology part is introduced, material is concentrated mainly on to the enhancements of agricultural machinery cutter self-sharpening blade both at home and abroad
Expect design aspect, but there are still many problems, how preparing long service life, self-sharpening effect, good cutter is still current
Technical problem.
The preparation of self-sharpening blade cutter mainly realizes that firmness change leads to abrasion loss difference in cutting edge section, to realize material
The variation of hardness is mainly obtained in table using surface intensified techniques such as thermo-chemical treatment, built-up welding, spraying, claddings in the prior art
The different blade of hardness.
For Laser Cladding Treatment, cladding layer with matrix associativity is poor, cladding layer wears no resistance, easy to crack, and
The softening problem of heat affected area is the main problem for restricting laser melting and coating process and applying in preparing self-sharpening blade cutter.Laser is molten
The material composition of the process and self-fluxing alloyed powder covered is two key factors for influencing quality of cladding layer.For agricultural
For machinery, the blade of especially grass trimmer is relatively thin, easily-deformable under high-temperature heating, and the laser melting coating of alloy powder exists compared with disaster
It spends, substrate selected by one side and cladding layer material need good wetability, and the process of another aspect laser melting coating is wanted
Appropriately, suitable laser parameter need to be adjusted to be processed, to prevent cladding layer from the defects of stomata, crackle, splash blade occur
And the deformation of blade.
Based on this, the object of the present invention is to provide one kind to prepare self-sharpening blade based on surface laser cladding processing at cutter blade
The method of cutter.
In one embodiment of the present invention, the method for preparing self-sharpening blade cutter that provides the following steps are included:
(1) cutter is pre-processed: to waiting for that cladding region carries out cleaning polishing at cutter blade, is removed to table at cladding
The dirts such as the remaining dust in face, greasy dirt and oxide layer make it expose fresh metal；Polishing mode can be sand paper polishing or machinery
Polishing.
(2) using self-fluxing alloyed powder as raw material, pass through the side of the laser melting and coating process blade of cutter after the pre-treatment
Surface forms cladding layer；
The self-fluxing alloyed powder is (8- by Co-based alloy powder, tungsten-carbide powder and titanium carbide powder by weight
10): (2-4): (1-2) composition；Wherein:
By percentage to the quality, raw material forms the Co-based alloy powder are as follows:
Cr:15%, B:3.2%, Si:4%, Fe:8%, C:0.4%, surplus Ni；
By percentage to the quality, raw material forms the tungsten-carbide powder are as follows:
C:8-12%, Fe:0.06-0.08%, surplus W.
By percentage to the quality, raw material forms the titanium carbide powder are as follows:
C:20-24%, Al:0.04-0.08%, Nb:1-3%, surplus Ti.
The laser melting and coating process specifically:
Cladding power is 1400-1600W, the hot spot of powder feed rate 1.4r/min, scanning speed 0.03m/s, laser
Diameter is 3.5mm.
In the above method, the present invention is carried out by the technique of raw material composition and laser melting coating to self-fluxing alloyed powder
Optimization, significantly improves the quality of cladding layer and the self-sharpening effect of cutter.Wherein: the present invention selects Co-based alloy powder, carbon
Change tungsten powder and titanium carbide powder and be configured to self-fluxing alloyed powder by specific weight ratio, guarantees to melt with high hard phase content
The high rigidity and high-wearing feature of coating.
Melting and coating process parameter will affect the surface quality and performance of cladding layer, if laser melting coating power is too small, can make Ni
Based alloy heating is insufficient, is not completely melt, so that surface generates a large amount of stomata, the brittleness of cladding layer is larger, is also easy to produce and splits
Line, and it is poor with the metallurgical bonding of matrix；If laser melting coating power is excessive, cladding layer hardness is reduced, and heat affected area increases, and makes blade
Cause moderate finite deformation.The spot diameter of laser is too small, and the amount of lap between adjacent twice track can be made excessive, cause clad layer surface
Quality decline, and there are a large amount of gas hole defects；If the spot diameter of laser is excessive, the amount of lap between twice cladding track is too small,
Alloy powder coating heats insufficient in lap-joint, and the combination of matrix is undesirable, and it is big that stomata, coating brittleness occurs in lap-joint,
The decline of clad layer surface quality, is also easy to produce crackle.It is found through experiment that using laser melting and coating process are as follows: cladding power is 1400-
1600W, powder feed rate 1.4r/min, scanning speed 0.03m/s, laser spot diameter when being 3.5mm, the table of cladding layer
Face quality and best performance.
In order to enable those skilled in the art can clearly understand the technical solution of the application, below with reference to tool
The technical solution of the application is described in detail in the embodiment of body.
Test material used in the embodiment of the present invention is the test material of this field routine, can pass through commercial channel
It is commercially available.Wherein:
Embodiment 1: self-sharpening blade cutter is prepared based on surface laser cladding processing at cutter blade
The method flow schematic diagram of surface laser cladding is as shown in Figure 1 at cutter blade, which comprises
S101: the greasy dirt acetone at selected cutter blade is removed and is dried up, is beaten using sand paper or other modes
At knife milling tool blade, until exposing fresh metal.
S102: being put into cutter in laser cladding equipment, cutter blade is placed level first, then fixed cutting tool, with
Convenient for being positioned to it.
S103: the parameter that laser melting coating is arranged carries out laser melting coating.
Self-fluxing alloyed powder used by laser melting coating is pressed by Co-based alloy powder, tungsten-carbide powder and titanium carbide powder
Weight ratio is 10:3:2 composition；Wherein:
By percentage to the quality, raw material forms the Co-based alloy powder are as follows:
Cr:15%, B:3.2%, Si:4%, Fe:8%, C:0.4%, surplus Ni；
By percentage to the quality, raw material forms the tungsten-carbide powder are as follows:
C:10%, Fe:0.07%, surplus W.
By percentage to the quality, raw material forms the titanium carbide powder are as follows:
C:22%, Al:0.06%, Nb:2%, surplus Ti.
The laser melting and coating process specifically:
Cladding power is 1600W, the spot diameter of powder feed rate 1.4r/min, scanning speed 0.03m/s, laser is
3.5mm。
The above method is used treated cutter as shown in Fig. 2, cutter material is 65Mn.As seen from Figure 2, the knife
Tool includes: cutter hub 1, and cutter hub 1 is in scalloped shaped structure；Blade 4 is located at the circular arc side of the 1 scalloped shaped structure of cutter hub, the cutter hub 1
The whole length for being conducive to increase blade in scalloped shaped structure；Cladding line is formed after laser melting coating on the first surface of blade 4
Road 2, the cladding lines 2 are round-corner transition.Cladding lines 2, which can rub the East China of part stalk, becomes rolling friction, reduces
Friction of the stalk to cutter.Increase the wearability that cladding lines 2 not only increases cutter on the first surface of blade 4, also
The hardness and corrosion resistance for improving the first surface of blade 4 make the hardness of 4 first surface of blade be greater than the second table of blade 4
The hardness in face, it is different so as to cause the degree of wear of blade upper and lower surface, so that blade the more grinds the more sharp, to reach self-sharpening blade
Effect.The first surface is the face of 4 either side of blade, and forms cladding layer through Laser Cladding Treatment；The second surface
For the surface of the blade 4 opposite with the first surface.
The bolt hole 3 is provided with 4-6, and is uniformly arranged on the cutter hub 1.In being provided in the bolt hole 3
Screw thread, the internal screw thread by bolt and farm machinery for being fixed.
Be formed by the cutter of the present embodiment cladding layer with a thickness of 0.4-0.5mm, clad layer surface good quality, nothing
Crackle is high with the bond strength of substrate.The microstructure morphology of cladding layer is as shown in figure 3, cladding layer and matrix bond area
Microstructure morphology is as shown in Figure 4.
Test example 1: friction-wear test
1. test method:
Using the friction mode of ring block type, the wearability of 1 cladding sample of embodiment is detected, ring specimen is quenching
45 steel of state, annulus outer diameter are 40.5mm.Test carries out on MMS-2A microcomputer control friction wear testing machine, ring specimen
Revolving speed is 200r/min, and frictional force size is 100N, and each sample fraction time is 0.5h.
Before and after friction test, sample is cleaned in supersonic wave cleaning machine with alcohol, is then with precision
The balance of 0.0001g weighs three times to the quality of sample, takes quality of the mean value as sample, calculates sample before and after friction
Mass loss rate.
2. test result:
It is computed, the mass loss by cladding sample prepared by the method for the embodiment of the present invention 1, before and after friction test
Only 0.2mg, mass loss rate are only 0.002%.Illustrate using after laser melting and coating process processing of the invention sample it is wear-resisting
Property has obtained significant raising, can greatly improve the service performance of cutter, prolong its service life.
Test example 2:
Cutter manufactured in the present embodiment is carried out clover with the commercially available cutter produced by national standard (GB/T 1209-2009) to cut
Cut live comparative test.
As a result, it has been found that when fodder grass mechanical harvest clover, 6 mu of operation per hour, compared with the commercially available blade of national standard production,
Cutter operating efficiency manufactured in the present embodiment improves 34.2%, and oil consumption reduces 24.5%.
After 1400 mu of operation, cutter manufactured in the present embodiment still has sharp cutting performance, and cutting crops for rotation are concordant；And state
Marking cutting ability of the commercially available blade of production after 1000 mu of operation will sharply decline, cutting edge serious wear.
The foregoing is merely preferred embodiment of the present application, are not intended to limit this application, for the skill of this field
For art personnel, various changes and changes are possible in this application.Within the spirit and principles of this application, made any to repair
Change, equivalent replacement, improvement etc., should be included within the scope of protection of this application.
Claims (10)
1. a kind of based on the method that surface laser cladding processing prepares self-sharpening blade cutter at cutter blade, which is characterized in that including
Following steps:
(1) cutter is pre-processed；
(2) using self-fluxing alloyed powder as raw material, pass through a side surface of the laser melting and coating process blade of cutter after the pre-treatment
Form cladding layer；The laser melting and coating process specifically:
Cladding power is 1400-1600W, the spot diameter of powder feed rate 1.4r/min, scanning speed 0.03m/s, laser
For 3.5mm.
2. the method according to claim 1, wherein in step (1), the pretreated method are as follows: to cutter
It waits for that cladding region carries out cleaning polishing at blade, removes to dust, greasy dirt and oxide layer remained on surface at cladding, make its exposing
Fresh metal.
3. the method according to claim 1, wherein the self-fluxing alloyed powder is by Ni-based conjunction in step (2)
Bronze end, tungsten-carbide powder and titanium carbide powder are (8-10) by weight: (2-4): (1-2) composition.
4. according to the method described in claim 3, it is characterized in that, the Co-based alloy powder by percentage to the quality, it is former
Material composition are as follows:
Cr:15%, B:3.2%, Si:4%, Fe:8%, C:0.4%, surplus Ni；
By percentage to the quality, raw material forms the tungsten-carbide powder are as follows:
C:8-12%, Fe:0.06-0.08%, surplus W；
By percentage to the quality, raw material forms the titanium carbide powder are as follows:
C:20-24%, Al:0.04-0.08%, Nb:1-3%, surplus Ti.
5. the method according to claim 1, wherein the self-fluxing alloyed powder also wraps before laser melting coating
The step of including ball milling, the ball milling specifically: be placed in Co-based alloy powder, tungsten-carbide powder and titanium carbide powder by weight
In ball grinder, sealing is vacuumized, and is then passed to argon gas protection and is carried out ball milling, Ball-milling Time 4-6h.
6. according to the method described in claim 5, it is characterized in that, the size of the self-fluxing alloyed powder after ball-milling treatment is
200-300 mesh.
7. the method according to claim 1, wherein the cladding layer with a thickness of 0.4-0.5mm.
8. the self-sharpening blade cutter of the described in any item method preparations of claim 1-7.
9. self-sharpening blade cutter according to claim 8, which is characterized in that a side surface of the self-sharpening blade cutter blade is set
There is cladding layer, the thickness of the cladding layer and the thickness ratio of tool matrix base material are 1:(4-6).
10. self-sharpening blade cutter according to claim 8 or claim 9, which is characterized in that the self-sharpening blade cutter material is 65Mn.
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| 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 |
| CN113118459A (en) * | 2021-04-20 | 2021-07-16 | 中南大学 | Method for preparing blade through low-temperature laser cladding and metal-based composite powder for 3D printing |
| 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 |
| CN113549916A (en) * | 2021-07-22 | 2021-10-26 | 济南大学 | Shot blasting blade forming method based on 3D printing technology and capable of achieving partition structure performance |
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| CN113549916B (en) * | 2021-07-22 | 2022-06-17 | 济南大学 | Shot blasting blade forming method based on 3D printing technology and capable of achieving partition structure performance |
| CN113737555A (en) * | 2021-09-04 | 2021-12-03 | 东北石油大学 | Novel high-efficient pulper waste paper board system of smashing |
| CN114559045A (en) * | 2022-03-01 | 2022-05-31 | 广东凯利德科技有限公司 | Production method of novel austenitic stainless steel kitchen cutter and low-carbon high-chromium martensite alloy powder |
| 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 |
| CN115482228A (en) * | 2022-09-26 | 2022-12-16 | 阳江市安佳乐厨业有限公司 | Preparation process for strengthening cutting edge by using laser cladding technology |
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