Bearing steel suitable for the working condition of heavy load and great shock and its heat treatment process


Application Number: 00110646
Application Date: 2000.07.12
Publication Number: 1287183
Publication Date: 2001.03.14
Priority Information:
International: C21D9/40;C22C38/24
Applicant(s) Name: Dong Yuanyu
Address:
Inventor(s) Name: Dong Yuanyu;Dong Fengyu
Patent Agency Code: 21104
Patent Agent: yan wei
Abstract The bearing steel has the chemical composition by wt% of: C 0.6-0.8, Cr 0.20-0.34, Mn 0.55-0.85, Si 1.0-1.3, Mo 0.4-0.6, V 0.2-0.4, S less than 0.025 and P less than 0.025 other than Fe. The heat treatment of bearing parts after being turned is one direct quenching process including spheroidizing annealing to obtain globular pearlite structure, quenching and tempering. Or, the heat treatment of bearing parts after being turned is one HF surface quenching process including normalizing and tempering to obtain sorbite structure, the HF surface quenching and re-tempering.