GCr15轴承钢球开裂原因分析  

Analysis of the Cracking Cause of Bearing Balls of Steel GCr15

作　　者：任学堂 成建兵 REN Xuetang;CHENG Jianbing(Nanjing Iron&Steel Co.,Ltd.,High Speed Wire Rod Mill)

机构地区：[1]南京钢铁股份有限公司高线厂

出　　处：《南钢科技与管理》2022年第1期64-68,共5页NISCO Technology and Management

摘　　要：轴承钢球在精磨过程中出现批量的磨削开裂,针对开裂现象采用宏观观察、金相检测及扫面电镜对缺陷产生的原因进行全面分析,结果表明:钢球开裂起源于心部,开裂的主要原因为钢球内部存在大颗粒夹杂物,同时淬火工艺不当,造成的组织不均匀,加剧了裂纹扩展,结合实际生产过程,提出合理的防范措施以避免再次出现此类缺陷,进而提高产品的质量.In view of the batch cracking of hearing balls in the process of fine grinding,the causes of the defects are comprehensively analyzed by macro-observation,metallographic examination and electron microscope scanning.The results show that the cracking of the steel hall originates from the core.The main reason for the cracking is the large particle inclusions in the steel ball.At the same time,the improper quenching process leads to the uneven structure and aggravates the crack propagation.In combination with the actual production process,reasonable preventive measures are put forward to avoid such defects and to improve the quality of products.

关 键 词：钢球 开裂 组织不均匀 夹杂物 

分 类 号：TG1[金属学及工艺—金属学]