GCr15SiMo高淬透性轴承钢的热处理工艺研究  

Study on Heat Treatment Process of GCr15SiMo High Hardenability Bearing Steel

作　　者：赵辉[1] 杨建立 黄勇[1] 谢亮亮 刘克毅[1] ZHAO Hui;YANG Jianli;HUANG Yong;XIE Liangliang;LIU Keyi(Department of Welding Technology and Engineering,Xinjiang Institute of Engineering,Urumqi 830017,China;Welding Studio,Xinjiang Shihezi Tianfti Energy Co.,Ltd.,Shihezi 832000,China)

机构地区：[1]新疆工程学院焊接技术与工程系,新疆乌鲁木齐830017 [2]新疆石河子天富能源股份有限公司焊接工作室,新疆石河子832000

出　　处：《热加工工艺》2020年第14期131-133,共3页Hot Working Technology

基　　金：新疆维吾尔自治区高校科研计划项目(XJEDU2018Y05)。

摘　　要：采用OM、SEM、冲击试验、硬度测试和疲劳试验等方法,研究了不同时间等温淬火对GCr15SiMo轴承钢组织与性能的影响。结果表明:在本试验条件下,随着等温淬火时间的增加,GCr15SiMo钢中针状贝氏体组织逐渐增多,残余奥氏体含量逐渐降低。等温淬火时间从2 h增加到4 h时,试验钢中残余奥氏体体积分数从20.3vol%降低到9.8vol%,明显减少。随着等温淬火时间的增加,试验钢硬度变化不大,冲击功逐渐升高,经过210℃×12 h等温淬火+220℃×1 h回火试验钢的冲击功最高,达到82.2 J。经过210℃×2 h等温淬火+220℃×1 h回火试验钢的疲劳寿命最长。The effects of isothermal quenching for different time on the microstructure and properties of GCr15 SiMo bearing steel were studied by OM, SEM, impact test, hardness test and fatigue test. The results show that in this test condition,with the increase of isothermal quenching time, the acicular bainite in GCr15 SiMo steel increases gradually, and the volume fraction of retained austenite decreases gradually. When the isothermal quenching time increases from 2 h to 4 h, the volume fraction of retained austenite in the steel decreases from 20.3 vol% to 9.8 vol%, significantly decreases. With the increases of isothermal quenching time, the hardness of the test steel changes little, and the impact energy increases gradually. The impact energy of 210 ℃×12 h isothermal quenching and 220 ℃×1 h tempering test steel is the highest, reaching 82.2 J. The fatigue life of 210 ℃×2 h isothermal quenching and 220 ℃×1 h tempering test steel is the longest.

关 键 词：轴承钢 等温淬火 组织 性能 

分 类 号：TG161[金属学及工艺—热处理]