A kind of btzc15 bearing steel produced by adopting the second fire forming process and its production method

A technology of bearing steel and technology, which is applied in the field of BTZC15 bearing steel and its production, can solve the problems that the product is difficult to maintain the survival and sustainable development of the enterprise, and achieve good deep processing performance, reduce production cost, and good safety in use Effect

Active Publication Date: 2021-06-18
BAOTOU IRON & STEEL GRP
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Problems solved by technology

[0003] Baotou Steel is a traditional ordinary carbon steel production enterprise. In the increasingly fierce market competition, due to the increase in the number of peers, the rise in raw material prices, and disorderly competition in product prices, traditional ordinary carbon steel products have been discontinued. It is difficult to maintain the survival and sustainable development of enterprises

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  • A kind of btzc15 bearing steel produced by adopting the second fire forming process and its production method
  • A kind of btzc15 bearing steel produced by adopting the second fire forming process and its production method
  • A kind of btzc15 bearing steel produced by adopting the second fire forming process and its production method

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Embodiment Construction

[0021] The technical features and advantages of the present invention will be described in more detail below in conjunction with the embodiments.

[0022] A production method of BTZC15 bearing steel produced by a second-fire process, including primary heating of a steel billet, billet rolling, billet heating, and continuous hot rolling of seamless steel pipes;

[0023] The total heating time of the steel billet is 7 hours for one heating, the temperature of the preheating section is 780°C, the temperature of the heating section is 1100-1230°C, the temperature of the soaking section is 1180-1220°C, and the temperature is raised slowly when burning steel to ensure uniform heating temperature of the billet and reduce the temperature difference. The billet temperature difference is not greater than 50°C.

[0024] Rolling at a constant speed during rolling; cooling water is not poured directly on the rolled piece; the billet is not straightened by a leveler;

[0025] The total hea...

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Abstract

The invention discloses a BTZC15 seamless bearing steel pipe produced by adopting a two-fired rolling process. The mass percentages of its chemical components are: C 0.96-1.05%, Si 0.15-0.35%, Mn 0.30-0.45%, Cr 1.45 ~1.60%, Ce 0.0005~0.0015%, P≤0.020%, S≤0.010%, Pb≤0.002%, Ti≤0.005%, and the rest are iron and trace impurity elements. At the same time, its production method is provided. The BTZC15 seamless bearing steel pipe produced by this method meets the requirements of material composition, non-metallic inclusions and microstructure, and at the same time has high production efficiency and low metal consumption.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a BTZC15 bearing steel produced by a secondary firing process and a production method thereof. Background technique [0002] Bearing steel is the steel used to make balls, rollers and bearing rings. Bearing steel has high and uniform hardness and wear resistance, as well as a high elastic limit. Bearing steel has very strict requirements on the uniformity of chemical composition in steel, the content and distribution of non-metallic inclusions, and the distribution of carbides. It is one of the most stringent steel types in all steel production. [0003] Baotou Steel is a traditional ordinary carbon steel production enterprise. In the increasingly fierce market competition, due to the increase in the number of peers, the rise in raw material prices, and disorderly competition in product prices, traditional ordinary carbon steel products have been discontinued. It is difficul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/18C22C38/28C21D8/10B21B19/04B21B45/00
CPCB21B19/04B21B45/004C21D8/105C22C38/005C22C38/02C22C38/04C22C38/18C22C38/28
Inventor 余泽金张昭米永峰许占海姜海龙张行刚
Owner BAOTOU IRON & STEEL GRP
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