球化退火工艺对GCr15轴承钢组织和疲劳性能的影响  

Effect of Spheroidizing Process on Microtruscture and Fatigue Property of GCr15 Bearing Steel

作　　者：尹德福 汪开忠[1] 丁雷 谢钊远 张晓瑞[1] YIN Defu;WANG Kaizhong;DING Lei;XIE Zhaoyuan;ZHANG Xiaorui(Technology Center,Special Steel Company,Ma’anshan Iron&Steel Co.,Ltd.,Ma’anshan 243000,Anhui China)

机构地区：[1]马鞍山钢铁股份有限公司特钢公司技术中心,安徽马鞍山243000

出　　处：《热处理》2023年第1期37-39,共3页Heat Treatment

摘　　要：对GCr15轴承钢?60 mm棒料进行了不同工艺的球化退火,随后检测了棒料的显微组织。对球化退火后的棒料进行830℃保温30 min油淬和150℃保温90 min回火,随后进行接触疲劳试验和断口分析。结果表明:经加热至790℃、保温3.7 h炉冷至720℃保温3.2 h炉冷球化退火的GCr15钢组织较细小均匀,球化级别为2~3级,额定接触疲劳疲劳寿命L10达1.2×10^(7)次。GCr15 bearing steel bars 60 mm in diameter were spheroidized by different procedures,and then were tested for microstructure.After being spheroidized,the bars were heated to 830℃ and held for 30 min,quenched in oil,and tempered at 150℃ for 90 min,and then were subjected to contact fatigue testing and fracture testing.The results showed that the GCr15 steel spheroidized by heating to 790℃ and holding for 3.7h,furnace cooling to 720℃ and holding for 3.2 h followed by furnace cooling displayed uniform and fine structure,spheroidizing grade being No2 to 3,and rated contact fatigue life L10 reaching 1.2×10^(7).

关 键 词：轴承钢 球化退火 保温时间 接触疲劳寿命 

分 类 号：TG156.21[金属学及工艺—热处理]