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
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[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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