GCr15SiMn钢轴承套圈缺陷成因分析  

Reasons Analysis on Defect of a GCr15SiMn Steel Bearing Ring

作　　者：曹景炜 李涛[2] 马永强[2] 王哲[2] 穆立峰[2] 

机构地区：[1]铁姆肯(中国)投资有限公司无锡分公司,无锡214028 [2]东北特殊钢集团抚顺特殊钢股份有限公司技术处,抚顺113001

出　　处：《理化检验（物理分册）》2015年第12期905-907,共3页Physical Testing and Chemical Analysis(Part A:Physical Testing)

摘　　要：采用光学显微镜、扫描电镜等仪器对某GCr15SiMn钢轴承套圈在车加工后出现的表面裂纹缺陷进行了分析。结果表明:缺陷周围无脱碳现象,但缺陷附近存在异于基体的物质,主要为硅、铬、锰的氧化物,为GCr15SiMn钢基体元素的氧化产物,从高温氧化物的成因和机理来看,该缺陷是由锻造过程中产生的表面裂纹引起的基体元素高温氧化形成的,而非原始材料冶金缺陷。The surface crack defect appearing after processing of a GCr15 SiMn steel bearing ring was analyzed by optical microscope and scanning electron microscope.The results show that there was no decarburization phenomenon around the defect.There were some oxide inclusions in the cracks,and they were mainly monox,chromium oxide and manganese oxide.Through analyzing the cause and mechanism of the high temperature oxide inclusions,it could be concluded that the defect was caused by forging crack which induced high-temperature oxidation of the surrounding matrix elements,and it was not raw material metallurgic defect.

关 键 词：GCr15SiMn钢 轴承套圈 裂纹 缺陷 高温氧化 

分 类 号：TG115[金属学及工艺—物理冶金]