CN108179374A - A kind of method for making Nano surface for accelerating vacuum carburization rate - Google Patents
A kind of method for making Nano surface for accelerating vacuum carburization rate Download PDFInfo
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- CN108179374A CN108179374A CN201810089775.9A CN201810089775A CN108179374A CN 108179374 A CN108179374 A CN 108179374A CN 201810089775 A CN201810089775 A CN 201810089775A CN 108179374 A CN108179374 A CN 108179374A
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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
- C23C8/06—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
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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
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/04—Hardening by cooling below 0 degrees Celsius
-
- 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
- C21D7/00—Modifying the physical properties of iron or steel by deformation
- C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
- C21D7/04—Modifying the physical properties of iron or steel by deformation by cold working of the surface
- C21D7/06—Modifying the physical properties of iron or steel by deformation by cold working of the surface by shot-peening or the like
-
- 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
-
- 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
A kind of method for making Nano surface for accelerating vacuum carburization rate, the invention belongs to be heat-treated and Surface Engineering field, it is in order to solve the problems, such as that diffusion layer organization present in existing vacuum carburization technology is uneven, the carburizing period is long.Method for making Nano surface：First, it polishes and polishes after the cleaning of basis material acetone；It 2nd, will be in basis material clamping to fixture；3rd, the fixture that clamping has basis material, which is placed in supersonic microparticle bombardment device, carries out Surface Nanocrystalline；4th, vacuum carburization processing is carried out to the basis material that making Nano surface is modified using cycle pulse pattern；5th, basis material is heat-treated.The present invention carries out sample carbide rank reduction on diffusion layer organization of vacuum carburization heat treatment after making Nano surface " urge and oozing " processing, more small and dispersed, and be significantly improved on carburizing speed, the vacuum carburization speed oozed is urged to improve 24% or so than conventional vacuum carburizing speed using making Nano surface.
Description
Technical field
The invention belongs to be heat-treated and Surface Engineering field, and in particular to it is a kind of using making Nano surface technology in material table
Face prepares nano modification layer, accelerates vacuum carburization rate and improves the method for quality layer.
Background technology
Vacuum carburization technology is a kind of carburizing heat treatment technics carried out under vacuum conditions, is ensureing that it is high hard that surface has
Also ensure that center portion has both toughness while spending, surface carbon black and transgranular oxygen can be effectively prevent relative to traditional atmosphere carburizing
Change, carburizing can shorten carburizing time, more economical environmental protection at a higher temperature.But there are still carburizing temperature is higher, carburizing for it
The problems such as period is longer, energy consumption is larger optimizes in process aspect and adds corresponding the study on the subsidiary method and improve carburizing
Efficiency and quality layer are extended its service life and are necessary, therefore received using surface to meet increasingly newer industrial requirement
Pretreatment technology of the riceization technology as vacuum carburization, it is intended to improve diffusion layer organization, accelerate carburizing speed, reduce energy consumption.
Making Nano surface of metal material processing is to form certain thickness on bulk metal surface layer by violent plastic deformation
Nanometer crystal microstructure, and generate the treatment technology of residual stress and work-hardening effect, the globality of material can be effectively improved
Energy.Be put forward for the first time structural material nanosizing concept is the Lu Ke professors of China and scholar Lv Jian of Chinese origin, material surface nanosizing
Technology has been put into national Development of Nano-technology planning.The basic principle that making Nano surface occurs for metal material is that plasticity becomes
Shape.Supersonic fine particles bombarding is the mechanical processing side of a kind of new acquisition making Nano surface that nanosizing researcher proposes
Method is the basic principle using gas-solid two-phase flow, and using supersonic airstream as carrier, the hard solid for carrying enormous amount is micro-
Grain bombards metal surface repeatedly with high kinetic energy, makes metal surface that intense plastic strain occur, and crystal grain refinement is until nanometer amount
Grade, so as to be prepared in alloy surface with certain thickness nanocrystalline granulosa.
After supersonic fine particles bombarding carries out Surface Nanocrystalline, intense plastic strain occurs for metal surface, is formed
Plastic deformation layer；A large amount of dislocations are generated, dislocation density increases；Dislocation motion causes distortion of lattice, and crystal grain thinning forms low-angle
Crystal boundary, sub boundary, distortion and crystal boundary increase.In carburizing process, carbon atom enters metal inside by way of diffusion, according to
The correlation theory of diffusion：Diffusion velocity of the atom at surface, crystal boundary, dislocation is faster than elsewhere, this also referred to as " short circuit
Diffusion ".Reason is：It is in grain boundaries atom compared with upper state, is easy to beat, and these local atomic arrangements are not advised
Then, openr, atomic motion resistance is small, thus diffusion velocity is fast.Dislocation can be used as carbon atom quick as a kind of line defect
The channel of diffusion improves the diffusion coefficient of carbon atom, reduces the diffusion activation energy of carbon atom, thus diffusion velocity is very fast.
Making Nano surface of metal material technology can improve the overall performance of material, but itself and vacuum carburization technology are mutually tied
It shares and urges carburizing, the technology of improvement vacuum carburization layer tissue not on the books in vacuum carburization heat treatment.
Invention content
The purpose of the present invention is to solve diffusion layer organization present in existing vacuum carburization technology is uneven, the carburizing period
The problems such as length, high energy consumption, and provide for quickening carburizing rate during vacuum carburization and improve a kind of use of diffusion layer organization
Supersonic fine particles bombarding carries out the composite surface reinforcing side of vacuum carburization after matrix surface forms nano modification layer in advance
Method.
The method for making Nano surface that the present invention accelerates vacuum carburization rate is realized according to the following steps：
First, by basis material excision forming, substrate material surface is cleaned using acetone, then with sand paper polishing basis material
Surface and polishing treatment, are then cleaned by ultrasonic, the basis material after being cleaned after drying using absolute ethyl alcohol；
2nd, by the basis material clamping to fixture after cleaning, obtaining clamping has the fixture of basis material；
3rd, the fixture that clamping has basis material is placed in supersonic microparticle bombardment device and carries out Surface Nanocrystalline,
Mobile spray gun makes substrate surface different location obtain uniform surface within the unit interval to receive during Surface Nanocrystalline
Riceization processing, obtains the basis material of making Nano surface modification；
4th, the basis material that making Nano surface is modified is put into vacuum cementation furnace, it is 1 × 10 that vacuum degree is evacuated in stove- 3Pa is hereinafter, be heated to carburizing temperature, and using the progress vacuum carburization processing of cycle pulse pattern, completing vacuum carburization, treated
Basis material；
5th, vacuum carburization treated basis material carries out high temperature with 500~650 DEG C of temperature in vacuum cementation furnace and returns
Fire processing, takes out basis material oil quenching at a temperature of 700~800 DEG C, then at -100~-196 DEG C from vacuum cementation furnace
At a temperature of subzero treatment, finally with 150~250 DEG C of lonneals, complete to accelerate the table of vacuum carburization rate after being air-cooled to room temperature
Face method for making Nano.
The present invention is strong using the composite surface that vacuum carburization is carried out after supersonic microparticle bombardment progress substrate surface nanosizing
Change is handled, and substrate surface is made to generate plastic deformation and microdefect, to accelerate carburizing rate and improve quality layer.Compared to general
Logical vacuum carburization, compound technology of the present invention can obtain more uniform diffusion layer organization, can realize and ooze
The promotion of carbon rate.
Gained making Nano surface, which is urged, in the present invention oozes sample and the vacuum carburization sample progress without Surface Nanocrystalline
Hardness and tissue topography's test analysis, by test result it is found that relative to conventional vacuum carburizing, at making Nano surface " urge and oozing "
Sample reduction of carbide rank, more small and dispersed on diffusion layer organization of vacuum carburization heat treatment is carried out after reason, distribution is more
Uniformly, and on carburizing speed it is significantly improved, the vacuum carburization oozed speed is urged to ooze than conventional vacuum using making Nano surface
Carbon speed improves 24% or so.
Description of the drawings
Fig. 1 is vacuum carburization and process of thermal treatment figure in specific embodiment；
Fig. 2 is the vacuum carburization layer depth variation diagram with/without Surface Nanocrystalline in embodiment, and wherein ■ represents comparison
Embodiment, ● represent embodiment one；
Fig. 3 is vacuum carburization surface texture shape appearance figure in comparative example；
Fig. 4 is that vacuum carburization layer surface tissue topography schemes after making Nano surface in embodiment one.
Specific embodiment
Specific embodiment one：The method for making Nano surface that present embodiment accelerates vacuum carburization rate is real according to the following steps
It applies：
First, by basis material excision forming, substrate material surface is cleaned using acetone, then with sand paper polishing basis material
Surface and polishing treatment, are then cleaned by ultrasonic, the basis material after being cleaned after drying using absolute ethyl alcohol；
2nd, by the basis material clamping to fixture after cleaning, obtaining clamping has the fixture of basis material；
3rd, the fixture that clamping has basis material is placed in supersonic microparticle bombardment device and carries out Surface Nanocrystalline,
Mobile spray gun makes substrate surface different location obtain uniform surface within the unit interval to receive during Surface Nanocrystalline
Riceization processing, obtains the basis material of making Nano surface modification；
4th, the basis material that making Nano surface is modified is put into vacuum cementation furnace, it is 1 × 10 that vacuum degree is evacuated in stove- 3Pa is hereinafter, be heated to carburizing temperature, using the progress vacuum carburization processing of cycle pulse pattern, according to carburetted gas-protection gas order
Carburization Treatment is carried out, completes vacuum carburization treated basis material；
5th, vacuum carburization treated basis material carries out high temperature with 500~650 DEG C of temperature in vacuum cementation furnace and returns
Fire processing, takes out basis material oil quenching at a temperature of 700~800 DEG C, then at -100~-196 DEG C from vacuum cementation furnace
At a temperature of subzero treatment, finally with 150~250 DEG C of lonneals, complete to accelerate the table of vacuum carburization rate after being air-cooled to room temperature
Face method for making Nano.
The plastic deformation and dislocation that present embodiment is generated by step 3 making Nano surface distort to increase vacuum carburization
When carbon atom diffusion rate, improve diffusion layer organization, accelerate carburizing speed.
Specific embodiment two：The present embodiment is different from the first embodiment in that the matrix material described in step 1
Expect for 18Cr2Ni4WA, 20Cr2Ni4,12Cr2Ni4 or 20CrMoMn.
Specific embodiment three：The present embodiment is different from the first and the second embodiment in that it is used successively in step 1
60#, 240#, 600#, 800#, 1000#, 2000#, 3000# sand paper polishing substrate material surface.
Specific embodiment four：Surface in step 3 unlike one of present embodiment and specific embodiment one to three
100~200 μm of the diameter of hard particles in nanosizing processing procedure controls vertical jet length as 10~20cm, jet velocity
For 300~1200m/s.
The material of present embodiment hard particles is aluminium oxide ceramics.
Specific embodiment five：Surface in step 3 unlike one of present embodiment and specific embodiment one to four
The nano modification layer depth of the basis material of nano modification is 70~100 μm.
Specific embodiment six：Vacuum in step 4 unlike one of present embodiment and specific embodiment one to five
Carburizing medium during Carburization Treatment is acetylene (C2H2), protective gas is nitrogen (N2), 910~930 DEG C of carburizing temperature.
Present embodiment first carries out vacuumize process to carburizer, and it is 1 × 10 to be evacuated to vacuum degree-3Pa is hereinafter, be heated to oozing
Carbon temperature.Vacuum carburization processing is carried out using cycle pulse pattern, Carburization Treatment is carried out according to carburetted gas-protection gas order.It oozes
Carbon medium is acetylene, and protective gas is nitrogen, 1000~2000m of control acetylene flow3/ h, 1500~2000m of nitrogen flow3/ h,
Primary " carburetted gas-protection gas " is often carried out as a pulse period, within a pulse period, acetylene gas, which decomposes, provides carbon
Source, carbon atom are diffused into specimen surface, and in order to keep air pressure constant, it is constant to be passed through air pressure in nitrogen holding furnace, and prevents carburizing
Foreign gas is introduced in the process.Since the time that carbon atom is needed from diffusion into the surface to center portion is different, each pulse period
Duration of ventilation it is not exactly the same, the specific time should determine according to required carburized layer thickness.
Specific embodiment seven：Vacuum in step 4 unlike one of present embodiment and specific embodiment one to six
The time of Carburization Treatment is 8~10h.
Specific embodiment eight：In step 5 unlike one of present embodiment and specific embodiment one to seven with
500~650 DEG C of temperature carries out high tempering and handles 2~4h.
Specific embodiment nine：In step 5 unlike one of present embodiment and specific embodiment one to eight
1~2h of oil quenching at a temperature of 700~800 DEG C.
Specific embodiment ten：In step 5 unlike one of present embodiment and specific embodiment one to eight-
Subzero treatment 2h at a temperature of 100~-196 DEG C.
Specific embodiment 11：Step 5 unlike one of present embodiment and specific embodiment one to ten with
150~250 DEG C of lonneal 2h.
Embodiment one：The method for making Nano surface that the present embodiment accelerates vacuum carburization rate is implemented according to the following steps：
First, select 18Cr2Ni4WA that basis material is cut into the block of 15mm × 15mm × 15mm as basis material,
Surface impurity is cleaned using acetone, then successively with 60#, 240#, 600#, 800#, 1000#, 2000#, 3000# sand paper polishing base
Body material surface and polishing treatment, are then cleaned by ultrasonic, the basis material after being cleaned after drying using absolute ethyl alcohol；
2nd, by the middle concave slot of the basis material clamping after cleaning to fixture, the depth of baltimore groove is 10mm, is filled
Accompany the fixture of basis material；
3rd, the fixture that clamping has basis material is placed in supersonic microparticle bombardment device and carries out Surface Nanocrystalline,
Mobile spray gun makes substrate surface different location obtain uniform surface within the unit interval to receive during Surface Nanocrystalline
Riceization processing, hard particles be alumina ceramic powder (grain size be 120 μm), vertical jet length 20cm, and jet velocity is
600m/s, processing time 4min obtain the basis material that nano modification layer depth is 80 μm；
4th, the basis material that making Nano surface is modified is put into ECM vacuum cementation furnaces, be evacuated in stove vacuum degree for 1 ×
10-3Pa is hereinafter, be heated to 920 DEG C of carburizing temperature, using the progress vacuum carburization processing of cycle pulse pattern, according to carburetted gas-guarantor
It protects gas order and carries out Carburization Treatment, control acetylene flow 1500m3/ h completes vacuum carburization treated basis material；
5th, vacuum carburization treated basis material is carried out with 550 DEG C of temperature at high tempering in vacuum cementation furnace
4h is managed, basis material oil quenching 2h at a temperature of 800 DEG C is taken out from vacuum cementation furnace, then at a temperature of -150 DEG C at deep cooling
2h is managed, finally with 200 DEG C of lonneal 2h, completes to accelerate the method for making Nano surface of vacuum carburization rate after being air-cooled to room temperature.
10 basis materials are one group in the present embodiment step 3.
Comparative example：The present embodiment omits the Surface Nanocrystalline of step 3 unlike embodiment one.It is other
Step and parameter are identical with embodiment one.
Two kinds of vacuum carburization samples that embodiment one and comparative example obtain, carry out section hardness on microhardness instrument
Test, test load are 1000g, and test result is as shown in Fig. 2, the vacuum carburization layer depth with/without Surface Nanocrystalline is divided
It Wei not 1.8mm and 1.45mm；Through 4% nitric acid-alcohol corrosion corrosion section structure, tissue topography's observation, test knot are carried out
Shown in fruit Fig. 3 and Fig. 4.According to result of the test it can be seen that：Using same process, the sample through Surface Nanocrystalline is in infiltration layer
Tissue carbide rank reduces, more small and dispersed, and distribution is more uniform, is significantly improved on carburizing speed, using table
The vacuum carburization speed of face nanosizing pre-treatment improves 24% left side than the vacuum carburization speed without making Nano surface pre-treatment
It is right.Illustrate that making Nano surface pre-treatment can improve the carburizing coefficient of carbon under vacuum condition, shorten carburizing time, improve infiltration layer
Quality.
Claims (10)
1. a kind of method for making Nano surface for accelerating vacuum carburization rate, it is characterised in that this method is realized according to the following steps：
First, by basis material excision forming, substrate material surface is cleaned using acetone, then with sand paper polishing substrate material surface
And polishing treatment, then it is cleaned by ultrasonic using absolute ethyl alcohol, the basis material after being cleaned after drying；
2nd, by the basis material clamping to fixture after cleaning, obtaining clamping has the fixture of basis material；
3rd, the fixture that clamping has basis material is placed in supersonic microparticle bombardment device and carries out Surface Nanocrystalline, in table
Mobile spray gun makes substrate surface different location obtain uniform making Nano surface within the unit interval in the nanosizing processing procedure of face
Processing obtains the basis material of making Nano surface modification；
4th, the basis material that making Nano surface is modified is put into vacuum cementation furnace, it is 1 × 10 that vacuum degree is evacuated in stove-3Pa with
Under, carburizing temperature is heated to, vacuum carburization processing is carried out using cycle pulse pattern, completes vacuum carburization treated matrix material
Material；
5th, vacuum carburization treated basis material is carried out with 500~650 DEG C of temperature at high tempering in vacuum cementation furnace
Reason takes out basis material oil quenching at a temperature of 700~800 DEG C, then in -100~-196 DEG C of temperature from vacuum cementation furnace
Lower subzero treatment finally with 150~250 DEG C of lonneals, is air-cooled to and completes to accelerate the surface of vacuum carburization rate after room temperature and receive
Riceization method.
A kind of 2. method for making Nano surface for accelerating vacuum carburization rate according to claim 1, it is characterised in that step
Basis material described in one is 18Cr2Ni4WA, 20Cr2Ni4,12Cr2Ni4 or 20CrMoMn.
A kind of 3. method for making Nano surface for accelerating vacuum carburization rate according to claim 1, it is characterised in that step
In three during Surface Nanocrystalline hard particles 100~200 μm of diameter, control vertical jet length as 10~20cm,
Jet velocity is 300~1200m/s.
A kind of 4. method for making Nano surface for accelerating vacuum carburization rate according to claim 1, it is characterised in that step
The nano modification layer depth for the basis material that making Nano surface is modified is 70~100 μm in three.
A kind of 5. method for making Nano surface for accelerating vacuum carburization rate according to claim 1, it is characterised in that step
Carburizing medium in four in vacuum carburization processing procedure is acetylene, and protective gas is nitrogen, 910~930 DEG C of carburizing temperature.
A kind of 6. method for making Nano surface for accelerating vacuum carburization rate according to claim 1, it is characterised in that step
The time that vacuum carburization is handled in four is 8~10h.
A kind of 7. method for making Nano surface for accelerating vacuum carburization rate according to claim 1, it is characterised in that step
High tempering is carried out with 500~650 DEG C of temperature in five and handles 2~4h.
A kind of 8. method for making Nano surface for accelerating vacuum carburization rate according to claim 1, it is characterised in that step
In five at a temperature of 700~800 DEG C 1~2h of oil quenching.
A kind of 9. method for making Nano surface for accelerating vacuum carburization rate according to claim 1, it is characterised in that step
In five at a temperature of -100~-196 DEG C subzero treatment 2h.
A kind of 10. method for making Nano surface for accelerating vacuum carburization rate according to claim 1, it is characterised in that step
Five with 150~250 DEG C of lonneal 2h.
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| CN110273120B (en) * | 2019-07-30 | 2023-07-07 | 太原学院 | Method and device for rapidly nanocrystallizing alloy surface |
| CN111286591A (en) * | 2020-03-21 | 2020-06-16 | 哈尔滨工程大学 | Method for accelerating element diffusion on surface of low-carbon steel |
| CN111286591B (en) * | 2020-03-21 | 2021-12-24 | 哈尔滨工程大学 | Method for accelerating element diffusion on surface of low-carbon steel |
| CN113913733A (en) * | 2021-10-09 | 2022-01-11 | 上海丰东热处理工程有限公司 | Vacuum carburizing heat treatment process for low-carbon high-alloy steel |
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