GCr15轴承钢成品套圈热处理后点线状缺陷原因分析  

Reason analysis of punctiform and linear defects on GCr15 bearing steel ring after heat treatment

作　　者：王德勇 张群 齐锐 Wang Deyong;Zhang Qun;Qi Rui(Technology Research Institute,Bengang Steel Plates Co.,Ltd.,Benxi Liaoning 117000,China)

机构地区：[1]本钢板材股份有限公司技术研究院,辽宁本溪117000

出　　处：《金属热处理》2020年第10期241-245,共5页Heat Treatment of Metals

摘　　要：在热处理后的GCr15成品轴承套圈表面发现疑似裂纹的点线状缺陷。通过无损检测、光学显微镜、扫描电镜、能谱分析等手段对缺陷进行分析,发现缺陷处存在较大尺寸的氧化铝和硅酸盐复合夹杂物。通过采取"高拉碳"、"白渣操作"、"软吹""保护浇铸"等措施后,钢水纯净度得到进一步提高,避免了点线状缺陷的再次发生。Suspected crack punctiform and linear defects in the surface of the finished ring were found in the production of bearing steel inner ring,which was analyzed by using nondestructive detection,optical microscope,scanning electron microscopy,energy spectrum analysis.The results show that a few big size of aluminum oxide and silicate compound inclusions exist.By improving the purity of molten steel by adopting measures such as“high carbon pulling”,“white slag operation”,“soft blowing”and“protective casting”,the recurrence of punctiform and linear defects disappear.

关 键 词：GCR15钢 轴承钢 缺陷 白渣 

分 类 号：TG157[金属学及工艺—热处理]