CN106011732B - A kind of high chrome alloy steel and preparation method thereof with chromium carbide enhancement layer - Google Patents

A kind of high chrome alloy steel and preparation method thereof with chromium carbide enhancement layer Download PDF

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CN106011732B
CN106011732B CN201610569351.3A CN201610569351A CN106011732B CN 106011732 B CN106011732 B CN 106011732B CN 201610569351 A CN201610569351 A CN 201610569351A CN 106011732 B CN106011732 B CN 106011732B
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chromium carbide
enhancement layer
matrix
alloy steel
chrome alloy
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CN106011732A (en
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钟黎声
王昕�
许云华
燕映霖
赵梓源
陈利萍
宋珂
赵娜娜
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Xian University of Technology
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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
    • C23C8/02—Pretreatment of the material to be coated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/36—Removing material
    • B23K26/38—Removing material by boring or cutting
    • B23K26/382—Removing material by boring or cutting by boring
    • B23K26/389—Removing material by boring or cutting by boring of fluid openings, e.g. nozzles, jets
    • 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
    • C23C8/06—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 gases
    • C23C8/08—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 gases only one element being applied
    • C23C8/20—Carburising
    • C23C8/22—Carburising of ferrous surfaces
    • 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

Abstract

The invention discloses a kind of high chrome alloy steel with chromium carbide enhancement layer, including matrix, the surface of matrix has the tubular body of multiple recess, and the surface of matrix and the inner surface of tubular body all have chromium carbide enhancement layer, and matrix is high chrome alloy steel；The preparation method of above-mentioned composite material is：Matrix is surface-treated；Then laser boring, pickling, ultrasonic cleaning are carried out；The matrix of the tubular body with recess after obtained cleaning is subjected to carburizing in vacuum cementation furnace, obtains the complex with micron order chromium carbide enhancement layer；It is finally post-processed to obtain the high chrome alloy steel with chromium carbide enhancement layer.The present invention solves the problems, such as that chromium carbide particles are easy to fall off in existing chromium carbide enhancing steel-based composite material, size and distribution mode are uncontrollable, improve composite material overall mechanical properties and heat-resisting, wear-resisting property, and preparation method is simple, easy to implement.

Description

A kind of high chrome alloy steel and preparation method thereof with chromium carbide enhancement layer
Technical field
The invention belongs to steel based surface composite material technical fields, and in particular to a kind of height with chromium carbide enhancement layer Chromium alloyed steel, the invention further relates to the preparation methods of the composite material.
Background technique
Referred to as high chrome alloy steel, high chrome alloy steel generally has height when usual ratio of the chromium in steel is more than 10% Hardness and high-wearing feature, bearing steel and mill ball use steel to be often used high chrome alloy steel as raw material.As most important mould Has one of steel, high chrome alloy steel is because it has many advantages, such as high rigidity, high-wearing feature and high-fire resistance, in mold, cutter, metallurgy etc. Industry field is widely used.But intensity declines obviously with becoming larger for size, directly affects its service life, limitation Application range.It is chromium carbide specific stiffness with higher, specific modulus, low thermal coefficient of expansion and good thermal stability, wear-resisting Property, dimensional stability and the advantages that wetability good with steel material, enhance steel using it as the chromium carbide of reinforcement preparation Based composites are extensive in industrial applications such as Aeronautics and Astronautics, metallurgy, mines, become the hot spot of investigation of materials and exploitation.
Currently, preparation method is based on the enhanced form of chromium carbide enhancing steel-based composite material enhances with particle with liquid Based on casting infiltration, powder metallurgic method, these methods have it is at low cost, large-scale industrial production and part shape may be implemented not The advantages that being restricted.But in the preparation process of chromium carbide enhancing steel-based composite material, however it remains following outstanding problem：
1）Traditional technology of infiltration casting can only carry out the compound or surface recombination in part to workpiece；
2）In powder metallurgical technique, largely using bonding agent bonding or fixed alloy powder, cause to exist in composite layer big The defects of measuring stomata, slag inclusion；
3）Only the external intergranular gap of stiffened matter carries out casting infiltration or sintering to recombination process, is between hard particles and steel matrix Non- metallurgical bonding, binding force is very weak, and particle is easy to fall off；
4）Traditional technology of infiltration casting and powder metallurgical technique can only realize Dispersed precipitate particle enhanced steel iron base composite material Preparation, cannot obtain other more preferably reinforcement distribution modes, and uncontrollable to chromium carbide particles size and distribution mode.
Summary of the invention
The object of the present invention is to provide a kind of high chrome alloy steels with chromium carbide enhancement layer, solve existing chromium carbide and increase In strong steel-based composite material chromium carbide particles be easy to fall off, size and the uncontrollable problem of distribution mode.
It is a further object of the present invention to provide the preparation methods of above-mentioned composite material.
The technical scheme adopted by the invention is that：A kind of high chrome alloy steel with chromium carbide enhancement layer, including matrix, institute The surface for stating matrix has the tubular body of multiple recess, and the inner surface of the surface of described matrix and the tubular body all has carbonization Chromium enhancement layer, described matrix are high chrome alloy steel.
Further, the spacing between the tubular body is 25 μm~1000 μm, the caliber of the tubular body is 10 μm~ 40 μm, the depth of tubular body is not more than 20 μm.
Further, the chromium carbide enhancement layer with a thickness of 8 μm~20 μm, chromium carbide enhancement layer is by chromium carbide particles group At chromium carbide particles are uniformly distributed in the base, and the partial size of chromium carbide particles is 2 μm~15 μm, the volume point of chromium carbide particles Number is 60%~85%.
Further, described matrix tissue is any one or a few in martensite, austenite and ferrite.
A kind of preparation method of the high chrome alloy steel with chromium carbide enhancement layer, specifically includes following steps：
Step 1：Matrix is surface-treated, surface-treated matrix is obtained；
Step 2：Laser boring is carried out to the surface-treated matrix that the step 1 obtains using laser-beam drilling machine, so After carry out pickling, be rinsed with water later to neutrality, finally carry out ultrasonic cleaning, there is recess tubular body after being cleaned Matrix；
Step 3：The matrix with recess tubular body after cleaning that the step 2 obtains is placed in vacuum cementation furnace Carburizing, and held for some time are carried out under certain temperature, obtain the complex with micron order chromium carbide enhancement layer；
Step 4：The complex with micron order chromium carbide enhancement layer that the step 3 is obtained carry out heating quenching with it is low Temperature tempering post-processing, obtains the high chrome alloy steel with chromium carbide enhancement layer.
Further, the surface treatment of the step 1 is specially and cleans up matrix surface with acetone.
Further, laser boring carries out under vacuum condition or inert gas shielding in the step 2.
Further, the acid solution that pickling uses in the step 2 be volumetric concentration be 300ml/L hydrochloric acid, 60ml/L Phosphoric acid, the hydrogen peroxide of 120ml/L, the hydrofluoric acid of 300ml/L or 200ml/L sulfuric acid in any one, the ultrasonic wave is clear It washes and uses ethyl alcohol or acetone.
Further, carbon mass concentration is 0.9%~1.0% in vacuum cementation furnace in the step 3, and vacuum degree is not more than 1 ×104 Pa, carburizing temperature are 850 DEG C~900 DEG C, and carburizing mass fraction is no more than 0.5% in the unit area of matrix surface, protects The warm time is 8 min~25min.
Further, the temperature of heating quenching is 780 DEG C~820 DEG C in the step 4, and the temperature of lonneal is 300 DEG C~420 DEG C.
The beneficial effects of the invention are as follows：A kind of high chrome alloy steel with chromium carbide enhancement layer of the present invention, chromium atom and carbon Atom reacts under solid state temperature generates chromium carbide, and utilizes the diffusion of the position in the hole accomplished fluently in advance limitation chromium carbide, carbonization It is metallurgical bonding between chromium particle and matrix, is firmly combined, particle is not easily to fall off, can be beaten by control carburizing process parameters and laser It is multiple to solve existing chromium carbide enhancing steel-based for grain volume fraction, distribution and the form of hole state modulator chromium carbide reinforced phase In condensation material chromium carbide particles be easy to fall off, size and the uncontrollable problem of distribution mode, improve the body force of composite material Performance and heat-resisting, wear-resisting property are learned, and preparation method is simple, it is easy to implement.
Detailed description of the invention
Fig. 1 is the high chrome alloy steel preparation technology flow chart that the present invention has chromium carbide enhancement layer；
Fig. 2 is the structural schematic diagram for the high chrome alloy steel micron order tubular silicon carbide chromium that the present invention has chromium carbide enhancement layer.
In figure, 1. matrixes, 2. chromium carbide enhancement layers, 3. chromium carbide particles, 4. tubular bodies.
Specific embodiment
The following describes the present invention in detail with reference to the accompanying drawings and specific embodiments.
A kind of high chrome alloy steel with chromium carbide enhancement layer of the invention, including matrix 1, the surface of matrix 1 have more The tubular body 4 of a recess, the spacing between tubular body 4 are 25 μm~1000 μm, and the caliber of tubular body 4 is 10 μm~40 μm, pipe The depth of shape body 4 is not more than 20 μm, and the surface of matrix 1 and the inner surface of tubular body 4 all have the carbon with a thickness of 8 μm~20 μm Change chromium enhancement layer 2, chromium carbide enhancement layer 2 is made of chromium carbide particles 3, and chromium carbide particles 3 are evenly distributed in matrix 1, carbonization The partial size of chromium particle 3 is 2 μm~15 μm, and the volume fraction of chromium carbide particles 3 is 60%~85%, and matrix 1 is high chrome alloy steel, high Chromium alloyed steel includes the mass fraction of the carbon such as xCr12, xCr12MoV less than 0.5%（That is x < 5）, chromium content be greater than 10% Gao Ge Steel alloy, the tissue of matrix 1 are any one or a few in martensite, austenite and ferrite.
The preparation method of the above-mentioned high chrome alloy steel with chromium carbide enhancement layer, specifically includes following steps：
Step 1：Matrix surface is cleaned up with acetone, obtains surface-treated matrix；
Step 2：Step 1 is obtained under vacuum condition or inert gas shielding using laser-beam drilling machine surface-treated Matrix carry out laser boring, then carry out pickling, the acid solution that pickling uses be volumetric concentration be 300ml/L hydrochloric acid, 60ml/ The phosphoric acid of L, the hydrogen peroxide of 120ml/L, the hydrofluoric acid of 300ml/L or 200ml/L sulfuric acid in any one, rushed later with water It is washed till neutrality, finally carries out ultrasonic cleaning using ethyl alcohol or acetone, the matrix with recess tubular body after being cleaned；
Step 3：The matrix with recess tubular body after cleaning that step 2 obtains is placed in vacuum cementation furnace certain At a temperature of carry out carburizing, in vacuum cementation furnace carbon mass concentration be 0.9%~1.0%, vacuum degree be not more than 1 × 104 Pa, carburizing temperature Degree is 850 DEG C~900 DEG C, and carburizing mass fraction is no more than 0.5% in the unit area of matrix surface, keeps the temperature 8 min~25min, Obtain the complex with micron order chromium carbide enhancement layer；
Step 4：Temperature of the complex with micron order chromium carbide enhancement layer that step 3 is obtained at 780 DEG C~820 DEG C Lower carry out heating quenching, and in 300 DEG C~420 DEG C of at a temperature of progress lonneal post-processing, it obtains with chromium carbide enhancing The high chrome alloy steel of layer.
The present invention combines laser boring, carburizing and heat treatment process, obtains micron order carbon in high-chromium alloy steel surface Change chromium enhancement layer, and with the tubular body with recess in the enhancement layer；The tubular body of recess is the carbonization by high-volume fractional What chromium particle and a small amount of matrix formed.
It is because of in 850 DEG C or more carburizings, on the one hand, the expansion of carbon in the base that carburizing temperature, which selects 850 DEG C~900 DEG C, Scattered coefficient will rise rapidly, and diffusion velocity is too fast, and diffusion depth increases, and be unfavorable for chromium carbide volume fraction in chromium carbide enhancement layer Raising；On the other hand, carburizing temperature is higher than 900 DEG C, and the chromium carbide particles generated can be made rapidly to grow up, caused under mechanical property Drop.Carburizing temperature is lower than 850 DEG C, reduces diffusion kinetics, and matrix surface concentration of carbon is low.
In vacuum cementation furnace soaking time selection 8min~25min be because：Soaking time is higher than 25min, chromium carbide meeting It concentrates and is spread into matrix, be unfavorable for keeping the high-volume fractional of chromium carbide in chromium carbide enhancement layer；Soaking time is lower than 8min, Carbon in carburized layer cannot react completely, influence the reinforcing effect of enhancement layer.
In vacuum cementation furnace carbon mass concentration selection 0.9%~1.0% be because：Carbon mass concentration is higher than 1.0%, and carbon is in base Diffusion velocity in body is accelerated, and diffusion depth increases, and is unfavorable for the raising of chromium carbide volume fraction in chromium carbide enhancement layer；Carbonaceous It measures concentration and is lower than 0.9%, matrix surface concentration of carbon is too low.
The beneficial effects of the invention are as follows：
1）Realize the preparation of micron order blind hole in high-chromium alloy steel surface using laser drilling in vacuum environment, and Its spacing, depth, diameter etc. can be adjusted；
2）High chrome alloy steel and external source carbon keep chromium atom and carbon atom anti-under solid state temperature in heating, insulating process Chromium carbide should be generated, and using the diffusion of the position in the hole accomplished fluently in advance limitation chromium carbide, realizes that micron order tubular silicon carbide chromium increases The preparation of strong high-chromium alloy steel composite material；
3）Tubular silicon carbide chromium reinforcement can effectively increase the surface recombination thickness of heat-resisting alloy steel；
4）Tubular silicon carbide chromium internal diameter is 10~40 μm, and micro-hardness can reach 980~1650 HV, and composite impact is tough Propertya KIt can reach 24~32 J/cm2, be greatly improved composite material overall mechanical properties and heat-resisting, wear-resisting property；
5）It is metallurgical bonding between chromium carbide particles and matrix in tubular silicon carbide chromium, is firmly combined, particle is not easily to fall off.Together When, can by control carburizing process parameters and laser boring state modulator chromium carbide reinforced phase grain volume fraction, distribution and Form.Type, alloying level, fractions distribution of matrix etc. can also be adjusted according to working condition requirement, reach reinforced phase and matrix phase Between performance best match；
6）Preparation method is simple, easy, easy to operate, convenient to carry out.
Embodiment 1
The preparation of micron order tubular silicon carbide chromium enhancing 2Cr12 based composites
Step 1：2Cr12 steel alloy is smelted, especially controlling carbon content is 0.2%, and 2Cr12 alloy steel surface acetone is clear Wash clean obtains surface-treated 2Cr12 alloy steel matrix；
Step 2：The surface-treated 2Cr12 steel alloy that step 1 is obtained under vacuum conditions using laser-beam drilling machine Matrix carries out laser boring, and aperture is 30 μm, and hole depth is 20 μm, and pitch of holes is 1000 μm；Then pickling is carried out, what pickling used Acid solution is the hydrochloric acid that volumetric concentration is 300ml/L, is rinsed with water later to neutrality, finally carries out ultrasonic cleaning using ethyl alcohol, The 2Cr12 alloy steel matrix with recess tubular body after being cleaned；
Step 3：The 2Cr12 alloy steel matrix with recess tubular body after cleaning that step 2 obtains is placed in vacuum to seep In carbon furnace 900 DEG C at a temperature of carry out carburizing, in vacuum cementation furnace carbon mass concentration be 0.9%, vacuum degree be not more than 1 × 104 Pa, carburizing mass fraction is no more than 0.5% in the unit area of matrix surface, keeps the temperature 8 min, obtains with micron order chromium carbide The 2Cr12 steel alloy complex of enhancement layer；
Step 4：The 2Cr12 steel alloy complex with micron order chromium carbide enhancement layer that step 3 is obtained is at 780 DEG C At a temperature of carry out heating quenching, and 350 DEG C at a temperature of carry out lonneal post-processing, obtain increasing with micron order chromium carbide The 2Cr12 alloy steel composite material of strong layer.
In gained composite material, micron order tubular silicon carbide chromium enhancement layer with a thickness of 20 μm or so, tissue include partial size For 6~15 μm of granular carbonization chromium and martensitic matrix, the volume fraction of chromium carbide particles is 85%.Tubular silicon carbide chromium is microcosmic Hardness is 1650 HV, composite impact toughnessa kFor 24 J/cm2。
Embodiment 2
The preparation of micron order tubular silicon carbide chromium enhancing 5Cr12MoV based composites
Step 1：5Cr12MoV steel alloy is smelted, especially controlling carbon content is 0.5%, and 5Cr12MoV alloy steel surface is used Acetone cleans up, and obtains surface-treated 5Cr12MoV alloy steel matrix；
Step 2：Step 1 is obtained under inert gas argon gas shielded using laser-beam drilling machine surface-treated 5Cr12MoV alloy steel matrix carries out laser boring, and aperture is 20 μm, and hole depth is 18 μm, and pitch of holes is 25 μm；Then acid is carried out It washes, the acid solution that pickling uses is the hydrofluoric acid that volumetric concentration is 300ml/L, is rinsed with water later to neutrality, finally uses acetone Ultrasonic cleaning is carried out, the 5Cr12MoV alloy steel matrix with recess tubular body after being cleaned；
Step 3：The 5Cr12MoV alloy steel matrix with recess tubular body after cleaning that step 2 obtains is placed in vacuum In carburizer 880 DEG C at a temperature of carry out carburizing, carbon mass concentration is 1.0% in vacuum cementation furnace, vacuum degree no more than 1 × 104 Pa, carburizing mass fraction is no more than 0.5% in the unit area of matrix surface, keeps the temperature 15 min, obtains with micron order carbon Change the 5Cr12MoV steel alloy complex of chromium enhancement layer；
Step 4：The 5Cr12MoV steel alloy complex with micron order chromium carbide enhancement layer that step 3 is obtained is 800 Heating quenching is carried out at a temperature of DEG C, and in 300 DEG C of at a temperature of progress lonneal post-processing, is obtained with micron order carbonization The 5Cr12MoV alloy steel composite material of chromium enhancement layer.
In gained composite material, micron order tubular silicon carbide chromium enhancement layer with a thickness of 14 μm or so, tissue include partial size For 5~12 μm of granular carbonization chromium and martensitic matrix, the volume fraction of chromium carbide particles is 78%.Tubular silicon carbide chromium is microcosmic Hardness is 1360 HV, composite impact toughnessa kIt can reach 27 J/cm2。
Embodiment 3
The preparation of micron order tubular silicon carbide chromium enhancing 2Cr12MoV based composites
Step 1：2Cr12MoV steel alloy is smelted, especially controlling carbon content is 0.2%, and 2Cr12MoV alloy steel surface is used Acetone cleans up, and obtains surface-treated 2Cr12MoV alloy steel matrix；
Step 2：Step 1 is obtained under inert gas argon gas shielded using laser-beam drilling machine surface-treated 2Cr12MoV alloy steel matrix carries out laser boring, and aperture is 10 μm, and hole depth is 17 μm, and pitch of holes is 350 μm；Then acid is carried out Wash, the acid solution that pickling uses is the sulfuric acid that volumetric concentration is 200ml/L, be rinsed with water later to neutrality, finally using ethyl alcohol into Row ultrasonic cleaning, the 2Cr12MoV alloy steel matrix with recess tubular body after being cleaned；
Step 3：The 2Cr12MoV alloy steel matrix with recess tubular body after cleaning that step 2 obtains is placed in vacuum In carburizer 850 DEG C at a temperature of carry out carburizing, carbon mass concentration is 0.94% in vacuum cementation furnace, vacuum degree no more than 1 × 104 Pa, carburizing mass fraction is no more than 0.5% in the unit area of matrix surface, keeps the temperature 25min, obtains with micron order carbonization The 2Cr12MoV steel alloy complex of chromium enhancement layer；
Step 4：The 2Cr12MoV steel alloy complex with micron order chromium carbide enhancement layer that step 3 is obtained is 820 Heating quenching is carried out at a temperature of DEG C, and in 380 DEG C of at a temperature of progress lonneal post-processing, is obtained with micron order carbonization The 2Cr12MoV alloy steel composite material of chromium enhancement layer.
In gained composite material, micron order tubular silicon carbide chromium enhancement layer with a thickness of 8 μm, tissue include partial size be 2~ 10 μm of granular carbonization chromium and ferrite, the volume fraction of chromium carbide particles are 60%.Tubular silicon carbide chromium micro-hardness is 980 HV, composite impact toughnessa kIt can reach 32 J/cm2。
A kind of high chrome alloy steel with chromium carbide enhancement layer of the present invention, tissue signature are that micron order tubular silicon carbide chromium is equal Even vertical distribution is in high-chromium alloy steel surface, and internal diameter is 10~40 μm, and depth is not more than 20 μm, and spacing is in 25~1000 μm of models It encloses interior adjustable.The tissue of tubular silicon carbide chromium includes the micron order chromium carbide particles that equally distributed partial size is 2~15 μm, volume point Number is 60%~85%.Tubular silicon carbide chromium micro-hardness can reach 980~1650 HV；Integral composite impact flexibility aKIt is reachable To 24~32 J/cm2.By preparing micron order tubular silicon carbide chromium reinforcement in high-chromium alloy steel surface, height can further improve The wear-resisting property and high temperature resistance of chromium alloyed steel, the prepared high chrome alloy steel with micron order chromium carbide enhancement layer are compound Material can be applied to the production of all kinds of Wear-resistant, high-temperature resistant components and product in metallurgical industry.

Claims (9)

1. a kind of high chrome alloy steel with chromium carbide enhancement layer, which is characterized in that including matrix, the surface of described matrix has The inner surface of the tubular body of multiple recess, the surface of described matrix and the tubular body all has chromium carbide enhancement layer, the base Body is high chrome alloy steel；
Wherein, the spacing between the tubular body is 25 μm~1000 μm, and the caliber of the tubular body is 10 μm~40 μm, tubulose The depth of body is not more than 20 μm.
2. the high chrome alloy steel according to claim 1 with chromium carbide enhancement layer, which is characterized in that the chromium carbide increases Strong layer with a thickness of 8 μm~20 μm, chromium carbide enhancement layer is made of chromium carbide particles, and chromium carbide particles are evenly distributed on matrix In, the partial size of chromium carbide particles is 2 μm~15 μm, and the volume fraction of chromium carbide particles is 60%~85%.
3. the high chrome alloy steel according to claim 1 with chromium carbide enhancement layer, which is characterized in that described matrix tissue For any one or a few in martensite, austenite and ferrite.
4. a kind of preparation method of the high chrome alloy steel with chromium carbide enhancement layer, which is characterized in that specifically include following steps：
Step 1：Matrix is surface-treated, surface-treated matrix is obtained；
Step 2：Laser boring is carried out to the surface-treated matrix that the step 1 obtains using laser-beam drilling machine, then into Row pickling is rinsed with water later to neutrality, finally carries out ultrasonic cleaning, the base with recess tubular body after being cleaned Body；
Step 3：The matrix with recess tubular body after cleaning that the step 2 obtains is placed in vacuum cementation furnace certain At a temperature of carry out carburizing, and held for some time, obtain the complex with micron order chromium carbide enhancement layer；
Step 4：The complex with micron order chromium carbide enhancement layer that the step 3 is obtained carries out heating quenching and low temperature returns Fire post-processing, obtains the high chrome alloy steel with chromium carbide enhancement layer.
5. a kind of preparation method of high chrome alloy steel with chromium carbide enhancement layer according to claim 4, feature exist In the surface treatment of the step 1 is specially to clean up matrix surface with acetone.
6. a kind of preparation method of high chrome alloy steel with chromium carbide enhancement layer according to claim 4, feature exist In laser boring carries out under vacuum condition or inert gas shielding in the step 2.
7. a kind of preparation method of high chrome alloy steel with chromium carbide enhancement layer according to claim 4, feature exist In, the acid solution that pickling uses in the step 2 be volumetric concentration be 300ml/L hydrochloric acid, 60ml/L phosphoric acid, 120ml/L Any one in the sulfuric acid of hydrogen peroxide, the hydrofluoric acid of 300ml/L or 200ml/L, the ultrasonic cleaning use ethyl alcohol or third Ketone.
8. a kind of preparation method of high chrome alloy steel with chromium carbide enhancement layer according to claim 4, feature exist In carbon mass concentration is 0.9%~1.0% in vacuum cementation furnace in the step 3, and vacuum degree is not more than 1 × 104Pa, carburizing Temperature is 850 DEG C~900 DEG C, and carburizing mass fraction is no more than 0.5% in the unit area of matrix surface, soaking time 8min ~25min.
9. a kind of preparation method of high chrome alloy steel with chromium carbide enhancement layer according to claim 4, feature exist In the temperature of heating quenching is 780 DEG C~820 DEG C in the step 4, and the temperature of lonneal is 300 DEG C~420 DEG C.
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CN101417380A (en) * 2007-10-25 2009-04-29 北京北科德瑞冶金工程技术有限公司 Manufacture method of composite roller for rolling narrow strip
CN101705454A (en) * 2009-11-09 2010-05-12 西安建筑科技大学 Technology for preparing tungsten carbide reinforced high speed steel-based composite material
CN103757583A (en) * 2014-01-27 2014-04-30 内蒙古科技大学 Preparation method for surface-strengthened Fe-W alloy
CN105585327A (en) * 2014-10-24 2016-05-18 比亚迪股份有限公司 Metal/ceramic composite body and preparation method thereof

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