CN104694847A - Carburized bearing steel - Google Patents
Carburized bearing steel Download PDFInfo
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- CN104694847A CN104694847A CN201310657300.2A CN201310657300A CN104694847A CN 104694847 A CN104694847 A CN 104694847A CN 201310657300 A CN201310657300 A CN 201310657300A CN 104694847 A CN104694847 A CN 104694847A
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- bearing steel
- carburizing
- carburized bearing
- carburizing bearing
- carburized
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Abstract
The invention relates to a carburized bearing steel, which consists of the following components by weight: iron, silicon, chromium, nickel, carbon, copper, manganese, molybdenum, sulfur, aluminum, nitrogen, titanium, tin, oxygen and phosphorus. The carburized bearing steel has high relative purity and long contact fatigue life, and the content of trace elements has no influence to purity while optimizing the comprehensive performance of carburized bearing steel. The carburized bearing steel has good comprehensive mechanical properties, and has hardness, strength, elongation and shrinkage degree superior to ordinary bearing steel, thus being suitable for extensive application.
Description
Technical field
The invention belongs to the manufacture manufacture field of metallurgy industry bearing steel, particularly relate to a kind of carburizing bearing steel.
Background technology
Bearing steel is the important support parts of various mechanical part, bearing steel in application process because of its application extensively and importance, also higher to its performance requriements, especially in chemical composition, dimensional precision, clarity, surface imperfection.The aspects such as the homogeneity of carbide.
Nitriding carburizing treatment is carried out for bearing steel and can improve its comprehensive mechanical property.Especially by the carburizing bearing steel that carburizing treatment obtains, surface has higher hardness, good wear resisting property, higher fatigue resistance, good dimensional stability.But in order to obtain good surface cementation effect, the requirement for carburization process is higher, complex technical process.Bearing steel, when carrying out surface carburization process, needs at high temperature to keep the long period, easily causes the defects such as coarse grains.In order to crystal grain thinning, improve toughness, the over-all properties that trace element improves bearing steel can be attached while carburizing.But choose which type of trace element and choose important factor and the technical issues that need to address that micro-amount is the application of current carburizing bearing steel.
Summary of the invention
The present invention, in order to solve above-mentioned technical problem, proposes one and has good comprehensive mechanical property, can bear the bearing steel of larger impact load.
Technical scheme of the present invention is as follows:
A kind of carburizing bearing steel, composed of the following components by weight:
Preferably, carburizing bearing steel is composed of the following components by weight:
In carburizing bearing steel, selection and the mechanism of action of various composition illustrate as follows.
Carbon, as in carburizing bearing steel except iron most important element.The content of carbon determines the hardness of carburizing bearing steel.The carbon content of the present invention's design, can ensure the hardness of carburizing bearing steel on the one hand, can ensure that the stable of carburization process carries out on the other hand, obtain good toughness.
Chromium, can increase the wear resistance on cementation zone surface in carburizing bearing steel; Silicon, can improve intensity and the elastic limit of carburizing bearing steel, and nickel contributes to the reaction of carbon atom in austenite, improves the toughness of steel.Other trace elements are also the mechanical properties that can promote carburizing bearing steel.
Preferably, carburizing bearing steel be successively through quenching, double tempering is heat treated.The technique of quenching and double tempering can make the tensile strength of bearing steel and hardness be greatly improved.Preferred, the temperature of quenching is 800-900 DEG C.Preferred, the temperature of double tempering is 150-170 DEG C.
The beneficial effect of technical scheme of the present invention is as follows:
The first, the carburizing bearing steel relative purity that obtains of technical scheme of the present invention is high, and contact fatigue life is high, and the content of trace element also can not affect its purity while playing the over-all properties optimizing carburizing bearing steel.
The second, the carburizing bearing steel that technical scheme of the present invention obtains has good comprehensive mechanical property, no matter be hardness, intensity or extensibility, shrink grading etc. are all better than common bearing steel, are applicable to being widely used in severe Working environment and the important component such as heavy duty, shock-resistant, high pressure.
Three, the carburizing of carburizing bearing steel that obtains of technical scheme of the present invention is respond well, and grain fineness number is high.
Embodiment
Following non-limiting example can make the present invention of those of ordinary skill in the art's comprehend, but does not limit the present invention in any way.
Embodiment 1
Proportioning bearing steel is carried out according to the composition of following weight ratio:
Through electrosmelting, vacuum oven is degassed, and molten steel waters and builds up steel ingot, is then rolled into round steel, and after annealing process is prepared and obtains.Adopt cementing process thermal treatment (thermal treatment process: 800 DEG C are incubated 10 hours, and stove is chilled to 200 DEG C of air coolings of coming out of the stove).By obtained bearing steel through the quenching of 900 DEG C and the double tempering thermal treatment process of 170 DEG C.Finally obtained carburizing bearing steel is carried out the test of mechanical property and other over-all propertieies.Analyze by detection and obtain: the bearing steel that the embodiment of the present invention obtains, mechanical property and all compound use requirements of other over-all propertieies after test, the over-all propertieies such as fatigue lifetime, clarity, hardness, intensity can apparently higher than common carburizing bearing steel.
Claims (5)
1. a carburizing bearing steel, is characterized in that: described carburizing bearing steel is composed of the following components by weight:
2. carburizing bearing steel according to claim 1, is characterized in that: described carburizing bearing steel is composed of the following components by weight:
3. carburizing bearing steel according to claim 1, is characterized in that: described carburizing bearing steel be successively through quenching, double tempering is heat treated.
4. carburizing bearing steel according to claim 3, is characterized in that: the temperature of described quenching is 800-900 DEG C.
5. carburizing bearing steel according to claim 3, is characterized in that: the temperature of described double tempering is 150-170 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310657300.2A CN104694847A (en) | 2013-12-04 | 2013-12-04 | Carburized bearing steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310657300.2A CN104694847A (en) | 2013-12-04 | 2013-12-04 | Carburized bearing steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104694847A true CN104694847A (en) | 2015-06-10 |
Family
ID=53342386
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310657300.2A Pending CN104694847A (en) | 2013-12-04 | 2013-12-04 | Carburized bearing steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104694847A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107904498A (en) * | 2017-10-20 | 2018-04-13 | 江阴兴澄特种钢铁有限公司 | A kind of railway freight-car carburizing bearing steel and preparation method thereof |
-
2013
- 2013-12-04 CN CN201310657300.2A patent/CN104694847A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107904498A (en) * | 2017-10-20 | 2018-04-13 | 江阴兴澄特种钢铁有限公司 | A kind of railway freight-car carburizing bearing steel and preparation method thereof |
| CN107904498B (en) * | 2017-10-20 | 2020-05-22 | 江阴兴澄特种钢铁有限公司 | Carburized bearing steel for railway wagon and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150610 |