CN109554620A - A kind of high-carbon-chromium bearing steel and preparation method thereof - Google Patents
A kind of high-carbon-chromium bearing steel and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/14—Treatment of metallic powder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/14—Treatment of metallic powder
- B22F1/145—Chemical treatment, e.g. passivation or decarburisation
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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
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/02—Making ferrous alloys by powder metallurgy
- C22C33/0257—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements
- C22C33/0264—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements the maximum content of each alloying element not exceeding 5%
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
Abstract
The invention discloses a kind of high-carbon-chromium bearing steels and preparation method thereof.The high-carbon-chromium bearing steel is obtained by powder metallurgical technique, wherein alloy powder cleans in oxalic acid solution, nonmetal inclusion and metal powder are dissociated, further nonmetal inclusion is removed using electric separation or magnetic separation, the group of the high-carbon-chromium bearing steel by weight is divided into C:0.8~1.6, Cr:1.0~2.6%, Mn:0.2~1.8%, Si:0.1~1.5%, V:0.5~2.6%, surplus Fe.The high-carbon-chromium bearing steel even tissue is had excellent performance, and wearability is good, and fatigue life is long, while preparation cost is low.
Description
Technical field
The present invention relates to technical field of metal material, and in particular to a kind of high-carbon-chromium bearing steel and preparation method thereof.
Background technique
High-carbon-chromium bearing steel not only has good wear-resisting property and contacting fatigue resistance, but also has certain bullet
Property, toughness and good processing performance, mainly for the manufacture of bearing and bearing parts.The inherent quality of bearing is largely
Metallurgical quality depending on bearing steel --- the i.e. uniformity of chemical component, the content of non-metallic inclusion, type, size point
Cloth, the inhomogeneities of carbide and macrostructure.In addition, service performance and longevity of the thermal treatment quality of bearing parts to bearing
Life also plays conclusive effect.
In process of production, to the gross of the smelting of bearing steel require be constituent degree of purity and tissue it is equal
Even property.Wherein, the degree of purity of constituent refers to the content of impurity element and non-metallic inclusion, impurity element and nonmetallic folder
The content of sundries is fewer, and the degree of purity of constituent is higher.The uniformity of tissue refers to the partial size of carbide and distribution, carbon in steel
The partial size of compound is more tiny, and distribution is more uniform, and the uniformity of tissue is higher.According to statistics, due to the nonmetal inclusion in bearing steel
Failure caused by the metallurgical quality defect of object and carbide inhomogeneities accounts for the 65% of bearing failure.
Therefore, the raising of metallurgical quality is to the significant of bearing quality.It is currently molten by electroslag melting and vacuum
The content of the impurity such as sulphur, phosphorus, the oxygen in technology controlling and process bearing steel such as refining, but the equipment cost of this smelting process is higher and energy
Consume it is larger, and in order to improve the quality of bearing steel, it is also necessary to by forging repeatedly to improve structural homogenity, just be able to satisfy axis
The requirement for holding steel further increases the production cost of bearing steel.
Summary of the invention
The purpose of the present invention is to provide a kind of high-carbon-chromium bearing steels and preparation method thereof, to solve existing bearing steel group
Knit uneven and at high cost problem.
To achieve the above object, the present invention provides a kind of high-carbon-chromium bearing steel, and the high-carbon-chromium bearing steel is to pass through powder
Metallurgical technology obtains, and the group of the high-carbon-chromium bearing steel by weight is divided into C:0.8~1.6, Cr:1.0~2.6%, Mn:0.2
~1.8%, Si:0.1~1.5%, V:0.5~2.6%, surplus Fe.
In addition, the present invention also provides a kind of preparation method of high-carbon-chromium bearing steel, the preparation side of the high-carbon-chromium bearing steel
Method is cleaned comprising steps of alloy powder is put into oxalic acid solution, and nonmetal inclusion and metal powder are dissociated, further adopted
Nonmetal inclusion is removed with electric separation or magnetic separation.
Wherein, the high-carbon-chromium bearing steel preparation method the following steps are included:
Step S1, atomization prepare alloy powder and alloy powder are put into oxalic acid solution and clean, by nonmetal inclusion
It is dissociated from the alloy powder, and removal will be mingled with by electric separation or magnetic separation, the component of alloy powder by weight are as follows: C:
0.8~1.6, Cr:1.0~2.6%, Mn:0.2~1.8%, Si:0.1~1.5%, V:0.5~2.6%, surplus Fe；
Alloy powder is pressed into green compact by step S2 in a mold；
Green compact are carried out vacuum-sintering and obtain sintered blank by step S3.
Wherein, in step sl, alloy powder is put into 2~5h of cleaning in oxalic acid solution, is then dried.
Wherein, in step sl, using the impurity in the alloy powder after electric separation or magnetic separation process removal cleaning.
Wherein, in step s 2, alloy powder compression moulding under 200~860Mpa pressure.
Wherein, in step s3, the green compact are sintered in decomposing ammonia atmosphere.
Wherein, in step s3, sintering temperature is 1150~1280 DEG C, 2~6h of sintering time.
Preferably, the preparation method of the high-carbon-chromium bearing steel further include:
Step S4 is heat-treated the sintered blank, in 800~950 DEG C of progress austenitizings, then oil quenching, then
It is tempered at 160~200 DEG C, the soaking time of tempering is 2~4h.
The present invention has the advantage that
High-carbon-chromium bearing steel provided by the invention is prepared using powder metallurgical technique, and segregation-free is without forging technology
It can get uniform tissue, substantially increase the service life of bearing, reduce the preparation cost of high-carbon-chromium bearing steel.In addition,
By cleaning alloy powder in oxalic acid solution, dissociates nonmetal inclusion from alloy powder, further adopt later
It is removed with electric separation or magnetic separation, is mingled with that removal effect is good, improve the intensity and service life of bearing steel.In addition, high carbon chromium bearing
Include a small amount of vanadium in steel, crystal grain can be refined in sintering process, improve the wearability of high-carbon-chromium bearing steel.
Specific embodiment
Embodiments of the present invention are illustrated by particular specific embodiment below, those skilled in the art can be by this explanation
Content disclosed by book is understood other advantages and efficacy of the present invention easily.
It should be clear that structure depicted in this specification, ratio, size etc., only to cooperate the revealed content of specification,
So that those skilled in the art understands and reads, enforceable qualifications are not intended to limit the invention, therefore do not have technology
On essential meaning, the modification of any structure, the change of proportionate relationship or the adjustment of size can be generated not influencing the present invention
The effect of and the purpose that can reach under, should all still fall in the range of disclosed technology contents obtain and can cover.Together
When, cited such as "upper" in this specification, "lower", " left side ", right ", the term of " centre ", be merely convenient to describe bright
, rather than to limit the scope of the invention, relativeness is altered or modified, and is changing technology contents without essence
Under, when being also considered as the enforceable scope of the present invention.
Embodiment 1
The present embodiment provides a kind of high-carbon-chromium bearing steels.High-carbon-chromium bearing steel be obtained by powder metallurgical technique, wherein
Alloy powder cleans in oxalic acid solution, and nonmetal inclusion and metal powder are dissociated, further will using electric separation or magnetic separation
Nonmetal inclusion removal, the group of the high-carbon-chromium bearing steel by weight are divided into C:0.8~1.6, Cr:1.0~2.6%, Mn:
0.2~1.8%, Si:0.1~1.5%, V:0.5~2.6%, surplus Fe.
High-carbon-chromium bearing steel provided by the invention is prepared using powder metallurgical technique, and segregation-free is without forging technology
It can get uniform tissue, substantially increase the service life of bearing, reduce the preparation cost of high-carbon-chromium bearing steel.In addition,
By cleaning alloy powder in oxalic acid solution, dissociates nonmetal inclusion from alloy powder, further use
Electric separation or magnetic separation removal, are mingled with that removal effect is good, improve the intensity and service life of bearing steel.In addition, high-carbon-chromium bearing steel
In include a small amount of vanadium, crystal grain can be refined in sintering process, improve the wearability of high-carbon-chromium bearing steel.
Embodiment 2
The present embodiment provides a kind of preparation methods of high-carbon-chromium bearing steel.The preparation method of high-carbon-chromium bearing steel includes following
Step:
Step S1, atomization prepare alloy powder and alloy powder are put into oxalic acid solution and clean, by nonmetal inclusion
It is dissociated from the alloy powder, and removal will be mingled with by electric separation or magnetic separation.
Alloy powder is obtained by powder metallurgy gas atomization, and the granularity of alloy powder is less than 325 mesh.In addition,
In smelting process before powder processed, smelting steel oxygen content in water is less than 20ppm.
Alloy powder is put into dissociation cleaning 2h in oxalic acid solution, is then dried.Further, using electric separation or magnetic
Select the impurity in technique removal alloy powder.The method that this removal is mingled with is simple, and removal effect is significant.
The component of purified alloy powder by weight are as follows: C:0.86%, Cr:1.2%, Mn:0.2%, Si:
0.1%, V:0.5%, surplus Fe.
Alloy powder is pressed into green compact by step S2 in a mold.
Alloy powder is put into molding die, the size of mold is φ 60mm × 200mm, pressing pressure 200Mpa.
Green compact are carried out vacuum-sintering and obtain sintered blank by step S3.
In step s3, green compact are placed on to decompose in ammonia atmosphere and are sintered, sintering temperature is 1260 DEG C, when sintering
Between 5h.
Step S4, is heat-treated sintered blank.
After obtaining sintered blank, sintered blank is heat-treated.Heat treatment process is included in 900 DEG C of progress austenitizings,
Then oil quenching, then be tempered at 185 DEG C, the soaking time of tempering is 2h.
Embodiment 3
The present embodiment provides a kind of preparation methods of high-carbon-chromium bearing steel.The preparation method of high-carbon-chromium bearing steel includes following
Step:
Step S1, atomization prepare alloy powder and alloy powder are put into oxalic acid solution and clean, by nonmetal inclusion
It is dissociated from the alloy powder, and removal will be mingled with by electric separation or magnetic separation.
Alloy powder is obtained by powder metallurgy gas atomization, and the granularity of alloy powder is less than 325 mesh.In addition,
In smelting process before powder processed, smelting steel oxygen content in water is less than 20ppm.
Alloy powder is put into dissociation cleaning 3h in oxalic acid solution, is then dried.Further, using electric separation or magnetic
Select the impurity in technique removal alloy powder.The method that this removal is mingled with is simple, and removal effect is significant.
The component of purified alloy powder by weight are as follows: C:0.95%, Cr:1.45%, Mn:0.35%, Si:
0.22%, V:0.5%, surplus Fe.
Alloy powder is pressed into green compact by step S2 in a mold.
Alloy powder is put into molding die, the size of mold is φ 60mm × 200mm, pressing pressure 220Mpa.
Green compact are carried out vacuum-sintering and obtain sintered blank by step S3.
In step s3, green compact are placed on to decompose in ammonia atmosphere and are sintered, sintering temperature is 1220 DEG C, when sintering
Between 2h.
Step S4, is heat-treated sintered blank.
After obtaining sintered blank, sintered blank is heat-treated.Heat treatment process is included in 860 DEG C of progress austenitizings,
Then oil quenching, then be tempered at 180 DEG C, the soaking time of tempering is 2.5h.
Embodiment 4
The present embodiment provides a kind of preparation methods of high-carbon-chromium bearing steel.The preparation method of high-carbon-chromium bearing steel includes following
Step:
Step S1, atomization prepare alloy powder and alloy powder are put into oxalic acid solution and clean, by nonmetal inclusion
It is dissociated from the alloy powder, and removal will be mingled with by electric separation or magnetic separation.
Alloy powder is obtained by powder metallurgy gas atomization, and the granularity of alloy powder is less than 325 mesh.In addition,
In smelting process before powder processed, smelting steel oxygen content in water is less than 20ppm.
Alloy powder is put into dissociation cleaning 4h in oxalic acid solution, is then dried.Further, using electric separation or magnetic
Select the impurity in technique removal alloy powder.The method that this removal is mingled with is simple, and removal effect is significant.
The component of purified alloy powder by weight are as follows: C:1.05%, Cr:1.55%, Mn:0.65%, Si:
0.35%, V:0.8%, surplus Fe.
Alloy powder is pressed into green compact by step S2 in a mold.
Alloy powder is put into molding die, the size of mold is φ 60mm × 200mm, pressing pressure 260Mpa.
Green compact are carried out vacuum-sintering and obtain sintered blank by step S3.
In step s3, green compact are placed on to decompose in ammonia atmosphere and are sintered, sintering temperature is 1210 DEG C, when sintering
Between 3h.
Step S4, is heat-treated sintered blank.
After obtaining sintered blank, sintered blank is heat-treated.Heat treatment process is included in 900 DEG C of progress austenitizings,
Then oil quenching, then be tempered at 165 DEG C, the soaking time of tempering is 2.5h.
Embodiment 5
The present embodiment provides a kind of preparation methods of high-carbon-chromium bearing steel.The preparation method of high-carbon-chromium bearing steel includes following
Step:
Step S1, atomization prepare alloy powder and alloy powder are put into oxalic acid solution and clean, by nonmetal inclusion
It is dissociated from the alloy powder, and removal will be mingled with by electric separation or magnetic separation.
Alloy powder is obtained by powder metallurgy gas atomization, and the granularity of alloy powder is less than 325 mesh.In addition,
In smelting process before powder processed, smelting steel oxygen content in water is less than 20m.
Alloy powder is put into dissociation cleaning 5h in oxalic acid solution, is then dried.Further, using electric separation or magnetic
Select the impurity in technique removal alloy powder.The method that this removal is mingled with is simple, and removal effect is significant.
The component of purified alloy powder by weight are as follows: C:1.2%, Cr:1.6%, Mn:1.0%, Si:0.8%,
V:1.0%, surplus Fe.
Alloy powder is pressed into green compact by step S2 in a mold.
Alloy powder is put into molding die, the size of mold is φ 30mm × 90mm, pressing pressure 560Mpa.
Green compact are carried out vacuum-sintering and obtain sintered blank by step S3.
In step s3, green compact are placed on to decompose in ammonia atmosphere and are sintered, sintering temperature is 1240 DEG C, when sintering
Between 3.5h.
Step S4, is heat-treated sintered blank.
After obtaining sintered blank, sintered blank is heat-treated.Heat treatment process is included in 920 DEG C of progress austenitizings,
Then oil quenching, then be tempered at 200 DEG C, the soaking time of tempering is 3.5h.
Embodiment 6
The present embodiment provides a kind of preparation methods of high-carbon-chromium bearing steel.The preparation method of high-carbon-chromium bearing steel includes following
Step:
Step S1, atomization prepare alloy powder and alloy powder are put into oxalic acid solution and clean, by nonmetal inclusion
It is dissociated from the alloy powder, and removal will be mingled with by electric separation or magnetic separation.
Alloy powder is obtained by powder metallurgy gas atomization, and the granularity of alloy powder is less than 325 mesh.In addition,
In smelting process before powder processed, smelting steel oxygen content in water is less than 20ppm.
Alloy powder is put into dissociation cleaning 5h in oxalic acid solution, is then dried.Further, using electric separation or magnetic
Select the impurity in technique removal alloy powder.The method that this removal is mingled with is simple, and removal effect is significant.
The component of purified alloy powder by weight are as follows: C:1.4%, Cr:2.0%, Mn:1.0%, Si:0.2%,
V:1.5%, surplus Fe.
Alloy powder is pressed into green compact by step S2 in a mold.
Alloy powder is put into molding die, the size of mold is φ 60mm × 200mm, pressing pressure 200Mpa.
Green compact are carried out vacuum-sintering and obtain sintered blank by step S3.
In step s3, green compact are placed on to decompose in ammonia atmosphere and are sintered, sintering temperature is 1250 DEG C, when sintering
Between 2h.
Step S4, is heat-treated sintered blank.
After obtaining sintered blank, sintered blank is heat-treated.Heat treatment process is included in 930 DEG C of progress austenitizings,
Then oil quenching, then be tempered at 180 DEG C, the soaking time of tempering is 2h.
Embodiment 7
The present embodiment provides a kind of preparation methods of high-carbon-chromium bearing steel.The preparation method of high-carbon-chromium bearing steel includes following
Step:
Step S1, atomization prepare alloy powder and alloy powder are put into oxalic acid solution and clean, by nonmetal inclusion
It is dissociated from the alloy powder, and removal will be mingled with by electric separation or magnetic separation.
Alloy powder is obtained by powder metallurgy gas atomization, and the granularity of alloy powder is less than 325 mesh.In addition,
In smelting process before powder processed, smelting steel oxygen content in water is less than 20ppm.
Alloy powder is put into dissociation cleaning 3h in oxalic acid solution, is then dried.Further, using electric separation or magnetic
Select the impurity in technique removal alloy powder.The method that this removal is mingled with is simple, and removal effect is significant.
The component of purified alloy powder by weight are as follows: C:1.5%, Cr:2.0%, Mn:1.2%, Si:1.0%,
V:2.0%, surplus Fe.
Alloy powder is pressed into green compact by step S2 in a mold.
Alloy powder is put into molding die, the size of mold is φ 60mm × 200mm, pressing pressure 300Mpa.
Green compact are carried out vacuum-sintering and obtain sintered blank by step S3.
In step s3, green compact are placed on to decompose in ammonia atmosphere and are sintered, sintering temperature is 1265 DEG C, when sintering
Between 2h.
Step S4, is heat-treated sintered blank.
After obtaining sintered blank, sintered blank is heat-treated.Heat treatment process is included in 950 DEG C of progress austenitizings,
Then oil quenching, then be tempered at 200 DEG C, the soaking time of tempering is 2h.
Mechanics Performance Testing is carried out to the high-carbon-chromium bearing steel that embodiment 2 to embodiment 7 obtains at room temperature, see Table 1 for details,
Wherein, mechanical property includes tensile strength and hardness.
Table 1 is mechanical experimental results at room temperature
The preparation method for the high-carbon-chromium bearing steel that above-described embodiment 2 is provided to embodiment 7, using powder metallurgical technique system
Standby, segregation-free can be obtained uniform tissue without forging technology, substantially increase the service life of bearing, reduce high-carbon
The preparation cost of chromium bearing steel.In addition, making nonmetal inclusion from alloy by cleaning alloy powder in oxalic acid solution
It dissociates in powder, is further removed later using electric separation or magnetic separation, be mingled with that removal effect is good, improve the intensity of bearing steel and make
Use the service life.In addition, including a small amount of vanadium in high-carbon-chromium bearing steel, crystal grain can be refined in sintering process, improve high carbon chromium axis
Hold the wearability of steel.
Although above having used general explanation and specific embodiment, the present invention is described in detail, at this
On the basis of invention, it can be made some modifications or improvements, this will be apparent to those skilled in the art.Therefore,
These modifications or improvements without departing from theon the basis of the spirit of the present invention are fallen within the scope of the claimed invention.
Claims (9)
1. a kind of high-carbon-chromium bearing steel, which is characterized in that the high-carbon-chromium bearing steel be obtained by powder metallurgical technique, wherein
Alloy powder cleans in oxalic acid solution, and nonmetal inclusion and metal powder are dissociated, further will using electric separation or magnetic separation
Nonmetal inclusion removal.The group of the high-carbon-chromium bearing steel by weight is divided into C:0.8~1.6, Cr:1.0~2.6%, Mn:
0.2~1.8%, Si:0.1~1.5%, V:0.5~2.6%, surplus Fe.
2. a kind of preparation method of high-carbon-chromium bearing steel, which is characterized in that the preparation method of the high-carbon-chromium bearing steel includes step
Rapid: alloy powder cleans in oxalic acid solution, and nonmetal inclusion and metal powder are dissociated, and further uses electric separation or magnetic separation
Nonmetal inclusion is removed.
3. the preparation method of high-carbon-chromium bearing steel according to claim 2, which is characterized in that the high-carbon-chromium bearing steel
Preparation method the following steps are included:
Step S1, atomization prepare alloy powder and alloy powder are put into oxalic acid solution and clean, by nonmetal inclusion from institute
It states in alloy powder and dissociates, and removal, the component of alloy powder by weight will be mingled with by electric separation or magnetic separation are as follows: C:0.8~
1.6, Cr:1.0~2.6%, Mn:0.2~1.8%, Si:0.1~1.5%, V:0.5~2.6%, surplus Fe；
Alloy powder is pressed into green compact by step S2 in a mold；
Green compact are carried out vacuum-sintering and obtain sintered blank by step S3.
4. the preparation method of high-carbon-chromium bearing steel according to claim 3, which is characterized in that in step sl, alloyed powder
End is put into 2~5h of cleaning in oxalic acid solution, is then dried.
5. the preparation method of high-carbon-chromium bearing steel according to claim 3, which is characterized in that in step sl, using electricity
The impurity in alloy powder after choosing or magnetic separation process removal cleaning.
6. the preparation method of high-carbon-chromium bearing steel according to claim 3, which is characterized in that in step s 2, alloyed powder
End compression moulding under 200~860MPa pressure.
7. the preparation method of high-carbon-chromium bearing steel according to claim 3, which is characterized in that in step s3, the life
Base is sintered in decomposing ammonia atmosphere.
8. the preparation method of high-carbon-chromium bearing steel according to claim 3, which is characterized in that in step s3, sintering temperature
Degree is 1150~1280 DEG C, 2~6h of sintering time.
9. the preparation method of high-carbon-chromium bearing steel according to claim 3, which is characterized in that the high-carbon-chromium bearing steel
Preparation method further include:
Step S4 is heat-treated the sintered blank, in 800~950 DEG C of progress austenitizings, then oil quenching, then 160~
It is tempered at 200 DEG C, the soaking time of tempering is 2~4h.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112143979A (en) * | 2020-09-15 | 2020-12-29 | 人本股份有限公司 | Preparation method of high-carbon bearing steel |
| CN113894291A (en) * | 2021-09-23 | 2022-01-07 | 石家庄铁道大学 | Method for melting and forming GCr15 bearing steel for high-speed rail in selective laser area |
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