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Seamless steel tube for cold rolling bearing ring sleeve and preparation method of seamless steel tube

A technology of seamless steel pipes and bearing rings, applied in the field of metallurgy, can solve problems such as difficult product maintenance and sustainable development of enterprises, achieve good deep processing performance and ensure safety

Inactive Publication Date: 2020-06-02
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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  • Seamless steel tube for cold rolling bearing ring sleeve and preparation method of seamless steel tube
  • Seamless steel tube for cold rolling bearing ring sleeve and preparation method of seamless steel tube

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Embodiment Construction

[0023] The above and other technical features and advantages of the present invention will be described in more detail below in conjunction with the embodiments.

[0024] The smelting production process includes hot metal pretreatment, requiring S≤0.05% and P≤0.12% to ensure that the inclusion content in the steel is at a low level. The final deoxidation adopts converter smelting, LF refining, VD degassing and round billet continuous casting. All converter smelting adopts pre-desulfurized molten iron. The molten iron is deoxidized with aluminum to reduce the gas content in steel, especially the oxygen content. The end temperature is ≥1630℃. The LF refining requires normal argon blowing throughout the whole process. The heating method from low to high is adopted, and the VD is deep. Vacuum ≤0.10Kpa, deep vacuum ≥13 minutes, 200m silicon-calcium wire is fed into the later stage of VD, so that the inclusions in the steel can be fully denatured, after the wire is fed, the soft blowing...

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Abstract

The invention discloses a seamless steel tube for a cold rolling bearing ring sleeve. The seamless steel tube is prepared from the following chemical components in percentage by mass: 0.98-1.03% of C,0.15-0.35% of Si, 0.30-0.45% of Mn, 1.45-1.60% of Cr, greater than or equal to 0.020% of P, less than or equal to 0.010% of S, and the balance of iron and trace impurity elements. The invention further discloses a preparation method of the seamless steel tube. According to the seamless steel tube for the cold rolling bearing ring sleeve, the tubular body hardness after spheroidizing annealing is190 HBW-205 HBW, the annealing microstructure level is level 2, materials have good deep processing performance after annealing, a microstructure of the materials can meet the technological requirements of user quenched-tempered heat treatment, and the safety of using the materials is guaranteed.

Description

Technical field [0001] The invention relates to the field of metallurgy, and in particular to a seamless steel pipe for cold-supplying bearing rings and a preparation method thereof. Background technique [0002] Bearing steel is steel used to make balls, rollers and bearing rings. Bearing steel has high and uniform hardness and wear resistance, as well as high elastic limit. Bearing steel has strict requirements on the uniformity of the chemical composition of the steel, the content and distribution of non-metallic inclusions, and the distribution of carbides. It is one of the most stringent steel grades in all steel production. [0003] Baotou Steel is a traditional plain carbon steel manufacturer. In the increasingly fierce market competition, traditional plain carbon steel products have become increasingly competitive due to the increase in the number of peers, the rise in raw material prices, and disorderly competition in product prices. It is difficult to maintain the survi...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/18C21C7/06C21C7/10C21D8/10C21D1/32B21B37/74
CPCB21B37/74C21C7/0056C21C7/06C21C7/10C21D1/32C21D8/105C22C38/02C22C38/04C22C38/18
Inventor 余泽金涛雅高红军米永峰张行刚姜海龙贾冬梅
Owner BAOTOU IRON & STEEL GRP
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