GCr15钢轴承外套圈磨削开裂失效分析  

Failure analysis on grinding cracking of GCr15 steel bearing outer ring

作　　者：邹龙江[1] 周全[1] 高路斯[1] 

机构地区：[1]大连理工大学材料科学与工程学院,辽宁大连116023

出　　处：《金属热处理》2013年第9期99-100,共2页Heat Treatment of Metals

摘　　要：采用金相显微镜、硬度计、X荧光光谱仪等检测分析方法,对GCr15钢轴承外套圈在磨削过程中开裂原因进行了分析。结果表明,引起套圈开裂的主要原因是组织过热,轴承套圈热处理淬火组织马氏体针粗大,导致轴承套圈变脆,进而在淬火残余应力和磨削拉应力的交互作用下失效开裂。Grinding cracking reasons of GCr15 steel bearing outer ring were analyzed by metallurgical microscope, hardness tester and X ray fluorescence spectrograph etc. The results show that the main reason of the ring cracking is overheating. There are coarse acicular martensite in the quenching microstructure of the ring which results in embrittlement, and then under the interaction of quenching residual stress and grinding tensile stress, the ring cracks failure.

关 键 词：GCR15钢 轴承外套圈 开裂 失效分析 

分 类 号：TG162.71[金属学及工艺—热处理]