CN110158023A - A kind of method of surface solid permeation at cutter blade - Google Patents
A kind of method of surface solid permeation at cutter blade Download PDFInfo
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- CN110158023A CN110158023A CN201910549215.1A CN201910549215A CN110158023A CN 110158023 A CN110158023 A CN 110158023A CN 201910549215 A CN201910549215 A CN 201910549215A CN 110158023 A CN110158023 A CN 110158023A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/22—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for drills; for milling cutters; for machine cutting tools
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- 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
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/04—Treatment of selected surface areas, e.g. using masks
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- 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
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/60—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using solids, e.g. powders, pastes
- C23C8/72—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using solids, e.g. powders, pastes more than one element being applied in one step
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- 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
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/80—After-treatment
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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)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Crushing And Pulverization Processes (AREA)
- Nonmetal Cutting Devices (AREA)
Abstract
The invention discloses a kind of methods of surface solid permeation at cutter blade, comprising the following steps: (1) pre-processes to cutter；Select the bottom surface of pretreated cutter as solid permeation processing region, by other region coating antiboronizing paints and anticarbonitriding paint of cutter；(2) step (1) treated cutter and penetration enhancer are packaged in seep jointly and carry out carbon, nitrogen and boron solid permeation processing in tank；(3) by solid permeation, treated that cutter is quenched in hardening media.Using the method for the present invention, treated that edge hardness is obviously improved, and wearability and corrosion resistance significantly improve, and substantially prolong cutting-tool's used life.
Description
Technical field
The present invention relates to agricultural machinery technological fields, and in particular to a kind of method of surface solid permeation at cutter blade.
Background technique
With China crops plough, kind, receive comprehensive mechanization level it is higher and higher.The annual cultivating member in China is because of abrasion
Loss reaches billions of members.And it is special as the cutter manipulating object of one of agricultural machinery key components and parts (sward, branch or stalk etc.),
Stronger wearability is required in the course of work.But due to abrasive wear, cutting edge rust, cutting power variation, operation effect
Rate economic performance declines to a great extent.In actual production, cutting edge is impacted by the hard object such as stone, brick bat and generating tipping causes without reason
The barrier production time substantially shortens.
Agricultural cutter is still based on monometallic material, and the generally existing hardness of domestic cutter, wearability be high, service life
Shorter problem, Chang Yinwei serious wear and cannot be used continuously completely；Traditional technique at blade only pass through at quenching
Reason, it is limited to the improvement of the performances such as the hardness, wearability, fatigue resistance of cutter, it is difficult to meet the complexity in arable land
The requirement of environment.
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.
Summary of the invention
For the above-mentioned prior art, the object of the present invention is to provide a kind of methods of surface solid permeation at cutter blade.
Using the method for the present invention, treated that edge hardness is obviously improved, and wearability and corrosion resistance significantly improve, and substantially prolong knife
The service life of tool.
To achieve the above object, the present invention adopts the following technical scheme:
The first aspect of the present invention provides a kind of method of surface solid permeation at cutter blade, comprising the following steps:
(1) cutter is pre-processed；Select the bottom surface of pretreated cutter as solid permeation processing region, by knife
Other region coating antiboronizing paints and anticarbonitriding paint of tool；
(2) step (1) treated cutter and penetration enhancer are packaged in seep jointly and carry out carbon, nitrogen and boron solid permeation processing in tank；
(3) by solid permeation, treated that cutter is quenched in hardening media.
Preferably, in step (1), the pretreated method are as follows: tool surface is carried out using sand paper or other modes
Polishing, the oxide layer for removing blade face and iron rust are until blade face exposes fresh metal；Greasy dirt acetone at blade is clear
It removes and dries up.
Preferably, in step (1), the coating thickness of the antiboronizing paint is 0.8-1.0mm；The anti-carbo-nitriding applies
The coating thickness of material is 1-1.2mm.
The coating thickness of antiboronizing paint and anticarbonitriding paint will affect resistance and seep effect and permeation treatment effect；If applying
The thickness covered is excessively thin, and the face for not requiring to carry out CNB permeation is caused to penetrate into tri- kinds of elements of C, N, B；It is blocked up that it will cause hinder penetration enhancer
Waste, increases processing cost.
Preferably, in step (2), the penetration enhancer is by boriding medium and carbonitriding medium by weight (50-60): (40-50)
Composition.Wherein:
The boriding medium is made of the raw material of following parts by weight:
20-30 parts of ferroalloy, 20-30 parts of borax, 10-20 parts of prodan, 4-6 parts of rare earth, 1-3 parts of urea, ammonium chloride 1
Part.
The carbonitriding medium comprises the following raw materials by weight percent:
Carbon black powder 55%, urea 25%, natrium carbonicum calcinatum 8%, rare earth 4%, anhydrous sodium acetate 8%.
The composition of penetration enhancer be for solid permeation treatment effect it is highly important, for realize carbon, nitrogen and boron it is ternary co-osmosized,
Penetration enhancer of the invention is made of by a certain percentage boriding medium and carbonitriding medium, and to the original in boriding medium and carbonitriding medium
Material composition is optimized, and rare earth (such as cerium oxide) therein and prodan synergistic effect can be improved seepage velocity and change
The performance of kind diffusion layer organization；Carbon, nitrogen and boron permeation is carried out using penetration enhancer of the invention, infiltration can be formed from outside to inside in blade face
Boron layer, carbonitrided case, this make blade face formed hardness change of gradient (boride layer microhardness 1100-1200HV,
Carbonitrided case microhardness 800-1000HV), it avoids and only carries out the problem of brittlement of boriding layer is easy to fall off greatly；Simultaneously because of knife
Piece surface is distributed in hardness, when blade operative can proportional abrasion can keep the sharpness of blade for a long time.
Preferably, in step (2), the cutter and infiltration top tank structure spacing are greater than 25mm；Seeping tank skin drying temperature is 200
DEG C, time 1h；Solid permeation temperature is 880 DEG C, time 4h.
Restriction cutter is to maintain blade with the purpose for seeping top tank structure spacing has sufficiently participation permeation to react close to inner wall side
Penetration enhancer amount；The too small blade face permeation processing that will cause close to inner wall side of spacing is incomplete.It is found through experiment that guarantee altogether
Seep processing completely, the spacing of cutter and infiltrating irrigation inner wall should be greater than 25mm.
Preferably, in step (3), hardening heat is 800-900 DEG C, cool time 8-12min.
Pass through quenching treatment, it is possible to reduce workpiece quenching deformation, surface hardness slightly improve；Blade base crystal grain simultaneously
It can be refined, improve blade toughness.
The second aspect of the present invention provides the above method and is preparing the application in self-sharpening knives.
The third aspect of the present invention, provides a kind of self-sharpening knives, and the first surface of the self-sharpening knives blade uses
Above-mentioned method carries out carbon, nitrogen and boron solid permeation processing, its hardness is made to be greater than the second surface of blade.
Further, the hardness distribution gradient of the second surface of the blade.
Beneficial effects of the present invention:
(1) with traditional technique at blade only by quenching treatment compared with, using method of the invention to blade into
Row processing, can be such that edge hardness is obviously improved, and wearability and corrosion resistance significantly improve, and cutting performance is steady after permeation processing
It is fixed；The performances such as the wearability due to the cutter of raising, cutting-tool's used life also greatly extend.
(2) it is improved using the present invention treated blade surface due to being permeated with permeation hardened layer, hardness and wearability,
And blade relative to a surface hardness at gradient distribution, since the degree of wear can keep the sharp of cutting edge to blade for a long time in blade surface
State, to achieve the effect that self-sharpening.
Detailed description of the invention
Fig. 1: the method flow schematic diagram of surface solid permeation at cutter blade of the invention.
Fig. 2: the structure of surface solid permeation treated cutter is shown at a kind of cutter blade provided by the embodiments of the present application
It is intended to (top view)；In figure, 1- cutter hub, 3- bolt hole, 4- blade.
Fig. 3: the section knot of surface solid permeation treated cutter at a kind of cutter blade provided by the embodiments of the present application
Structure schematic diagram；In figure, 2- permeation hardened layer, 3- bolt hole.
Fig. 4: the left view of surface solid permeation treated cutter at a kind of cutter blade provided by the embodiments of the present application；
In figure, the first surface of 41- blade, the second surface of 42- blade.
Fig. 5: boride layer displaing micro tissue topography figure.
Fig. 6: carbonitrided case displaing micro tissue topography figure.
Fig. 7: blade base displaing micro tissue topography figure.
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.
Solid permeation processing is a kind of new material processing method, and studying at present more is Bononizing pretreatment, boron-nitriding
Processing etc., and the research ternary co-osmosized for carbon, nitrogen and boron is less.Existing research shows that when progress carbon, nitrogen and boron is ternary co-osmosized, boron
Infiltration capacity is seldom, and surface layer forms boride layer difficulty, and therefore, the ternary co-osmosized difficulty of carbon, nitrogen and boron is larger.And utilize solid permeation
Processing, which prepares self-sharpening knives and also has no at present, to be had been reported that.
Based on this, the object of the present invention is to provide a kind of methods of surface solid permeation at cutter blade, and thus prepare
Self-sharpening knives are obtained.
In one embodiment of the present invention, the side that the surface at cutter blade carries out solid permeation processing is given
Method, comprising the following steps:
(1) cutter is pre-processed: is polished using sand paper or other modes tool surface, remove blade face
Oxide layer and iron rust until blade face exposes fresh metal, the greasy dirt acetone at cutter blade is removed and is dried up.
(2) select the bottom surface of pretreated cutter as solid permeation processing region, by other region coatings of cutter
Antiboronizing paint and anticarbonitriding paint；The coating thickness of the antiboronizing paint is 0.8-1.0mm；The anti-carbo-nitriding
The coating thickness of coating is 1-1.2mm.
(3) step (2) treated cutter and penetration enhancer are packaged in seep jointly and carry out carbon, nitrogen and boron solid permeation processing in tank；
The cutter and infiltration top tank structure spacing are greater than 25mm；Seeping tank skin drying temperature is 200 DEG C, time 1h；Solid permeation temperature is
880 DEG C, time 4h.
The penetration enhancer is by boriding medium and carbonitriding medium by weight (50-60): (40-50) is formed；Wherein:
The boriding medium is made of the raw material of following parts by weight:
20-30 parts of ferroalloy, 20-30 parts of borax, 10-20 parts of prodan, 4-6 parts of rare earth, 1-3 parts of urea, ammonium chloride 1
Part.
The carbonitriding medium comprises the following raw materials by weight percent:
Carbon black powder 55%, urea 25%, natrium carbonicum calcinatum 8%, rare earth 4%, anhydrous sodium acetate 8%.
(4) by solid permeation, treated that cutter is quenched in hardening media；The hardening media is quenching
The aqueous solution that liquid concentration is 8%；The hardening heat is 800-900 DEG C, cool time 8-12min.
Carbon, nitrogen and boron permeation is carried out using penetration enhancer of the invention, boride layer, carbon nitrogen can be formed from outside to inside in blade face
Co-penetration layer, this to form change of gradient (the boride layer microhardness 1100-1200HV, carbo-nitriding of hardness in blade face
Layer microhardness 800-1000HV), it avoids and only carries out the problem of brittlement of boriding layer is easy to fall off greatly；Simultaneously because blade face is in
Hardness distribution, when blade operative can proportional abrasion can keep the sharpness of blade for a long time.
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:
The manufacturer of " antiboronizing paint " and " anticarbonitriding paint " is the big heat-treated wood of Los Angeles area, Luoyang City Korean War
Expect factory, concrete model are as follows: FSB type antiboronizing paint, the anti-carbo-nitriding type coating of FSC type.
Embodiment 1: surface solid permeation is handled at cutter blade
The method flow schematic diagram of surface solid permeation is as shown in Figure 1 at cutter blade, which comprises
S101: polishing to tool surface using sand paper or other modes, removes the oxide layer and iron rust of blade face
Until blade face exposes fresh metal, the greasy dirt acetone at selected cutter blade is removed and is dried up.Specifically, it selects
After the cutter for needing to carry out solid permeation, the dirts such as dust, greasy dirt and oxide layer of tool surface will be described after cleaning out
Cutter carries out drying and processing.
S102: it selects the bottom surface of pretreated cutter as solid permeation processing region, other regions of cutter is applied
Cover antiboronizing paint and anticarbonitriding paint；Wherein, coating antiboronizing paint thickness is about 0.8mm, coats anti-CN permeation and applies
Expect that thickness is about 1mm.
S103: being encapsulated in cutter and penetration enhancer with waterglass mud and seep in tank, and cutter and infiltration top tank structure spacing are greater than 25mm, table
Face drying is placed on progress solid permeation processing in temperature controlling stove；Tank skin drying temperature is 200 DEG C, time 1h, solid permeation
Temperature is 880 DEG C, time 4h；After solid permeation processing, temperature controlling stove is closed, keeps seeping tank that Slow cooling is for 24 hours in temperature controlling stove
After take out, be then quenched in hardening media, the hardening media quenching liquid concentration be 8% aqueous solution, quenching
Treatment temperature is 850 DEG C, cool time 10min.
The penetration enhancer is made of boriding medium and carbonitriding medium by weight 55:45；Wherein:
The boriding medium is made of the raw material of following parts by weight:
25 parts of ferroalloy, 25 parts of borax, 15 parts of prodan, 5 parts of rare earth, 2 parts of urea, 1 part of ammonium chloride.
The carbonitriding medium comprises the following raw materials by weight percent:
Carbon black powder 55%, urea 25%, natrium carbonicum calcinatum 8%, rare earth 4%, anhydrous sodium acetate 8%.
Using the above method, treated that cutter is as in Figure 2-4, wherein Fig. 2 is the top view of cutter, can be with by Fig. 2
Find out, the cutter includes: cutter hub 1 in rectangular configuration, and blade 4 is located at two long sides of cutter hub 1, is equipped on cutter hub 1
Bolt hole 3 is not provided with internal screw thread in the bolt hole 3, and the bolt hole 3 by bolt and grass trimmer cutterhead for being fixed.
Fig. 3 is the cross-sectional view of permeation treated cutter, as seen from Figure 3, can be at the bottom of cutter after permeation is handled
Face forms permeation hardened layer 2, and the thickness of permeation hardened layer 2 is about 0.8mm.The ratio of permeation hardened layer and matrix base material will affect
The effect of self-sharpening, to make the cutter of preparation that there is excellent self-sharpening effect, by permeation hardened layer and matrix in the present embodiment
The thickness proportion of base material is limited to 1:4-5.
In the ternary co-osmosized treatment process of carbon, nitrogen and boron, the permeation hardened layer 2 is arranged on the first surface 41 of blade 4,
And in the form of infiltration infiltration in blade cutter hub, formed from outside to inside on the second surface 42 (Fig. 4) of blade 4 boride layer,
Carbonitrided case, boride layer microhardness 1100-1200HV, carbonitrided case microhardness 800-1000HV, matrix are micro- hard
Degree is about 500HV, this makes the hardness distribution gradient of the second surface 42 of blade 4.Wherein:
Boride layer displaing micro tissue topography figure is as shown in figure 5, carbonitrided case displaing micro tissue topography schemes as shown in fig. 6, blade
Matrix displaing micro tissue topography figure is as shown in Figure 7.
Permeation hardened layer 2 improves the hardness and corrosion resistance of blade 4, and it is biggish that 4 first surface of blade increases hardness
Permeation hardened layer improves its wearability, and second surface hardness distribution gradient, since blade is in the abrasion journey of second surface
Degree difference causes blade the more to grind the more sharp, to achieve the effect that self-sharpening blade, so that cutter life be made to extend.
Cutter its edge wear effect after surface solid permeation at blade is fairly obvious, and because it is with self-sharpening blade
Function improves work efficiency so substantially prolonging service life.
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 37.5%, and oil consumption reduces 26.8%.
After 1500 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 method of surface solid permeation at cutter blade, which comprises the following steps:
(1) cutter is pre-processed；Select the bottom surface of pretreated cutter as solid permeation processing region, by cutter
Other region coating antiboronizing paints and anticarbonitriding paint；
(2) step (1) treated cutter and penetration enhancer are packaged in seep jointly and carry out carbon, nitrogen and boron solid permeation processing in tank；
(3) by solid permeation, treated that cutter is quenched in hardening media.
2. the method according to claim 1, wherein in step (1), the pretreated method are as follows: use sand
Paper or other modes polish to tool surface, and the oxide layer and iron rust for removing blade face are until blade face exposing is fresh
Metal；Greasy dirt acetone at blade is removed and is dried up.
3. the method according to claim 1, wherein in step (1), the coating thickness of the antiboronizing paint is
0.8-1.0mm；The coating thickness of the anticarbonitriding paint is 1-1.2mm.
4. the method according to claim 1, wherein the penetration enhancer is by boriding medium and carbo-nitriding in step (2)
Agent is by weight (50-60): (40-50) composition.
5. according to the method described in claim 4, it is characterized in that, the boriding medium is made of the raw material of following parts by weight:
20-30 parts of ferroalloy, 20-30 parts of borax, 10-20 parts of prodan, 4-6 parts of rare earth, 1-3 parts of urea, 1 part of ammonium chloride；
The carbonitriding medium comprises the following raw materials by weight percent:
Carbon black powder 55%, urea 25%, natrium carbonicum calcinatum 8%, rare earth 4%, anhydrous sodium acetate 8%.
6. the method according to claim 1, wherein the cutter is greater than with top tank structure spacing is seeped in step (2)
25mm；Seeping tank skin drying temperature is 200 DEG C, time 1h；Solid permeation temperature is 880 DEG C, time 4h.
7. hardening heat is 800-900 DEG C the method according to claim 1, wherein in step (3), when quenching
Between be 8-12min.
8. the described in any item methods of claim 1-7 are preparing the application in self-sharpening knives.
9. a kind of self-sharpening knives, which is characterized in that the first surface of the self-sharpening knives blade is appointed using claim 1-7
One method carries out solid permeation processing, its hardness is made to be greater than the second surface of blade.
10. self-sharpening knives according to claim 9, which is characterized in that the hardness of the second surface of the blade is in ladder
Degree distribution.
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| CN201910549215.1A CN110158023B (en) | 2019-06-24 | 2019-06-24 | Method for co-infiltrating surface solids at cutting edge of cutter |
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Cited By (4)
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|---|---|---|---|---|
| CN111041161A (en) * | 2019-12-30 | 2020-04-21 | 山东农业大学 | Machining method for forming self-sharpening edge by slit type induction quenching of 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 |
| CN113005394A (en) * | 2021-02-22 | 2021-06-22 | 山东农业大学 | J55 steel pipe processing method based on rare earth catalytic carbonitriding |
| CN113832464A (en) * | 2021-09-01 | 2021-12-24 | 安徽宏翔农业机械有限公司 | Treatment process method for improving surface strength and wear resistance of rotary blade |
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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 |
| CN113005394A (en) * | 2021-02-22 | 2021-06-22 | 山东农业大学 | J55 steel pipe processing method based on rare earth catalytic carbonitriding |
| CN113832464A (en) * | 2021-09-01 | 2021-12-24 | 安徽宏翔农业机械有限公司 | Treatment process method for improving surface strength and wear resistance of rotary blade |
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