2Cr13钢渗氮后磨削面的“麻点”问题  

Pockmarks on ground surface of nitrided 2Cr13 steel

作　　者：赵明鹏 游平平 刘明虎 Zhao Mingpeng;You Pingping;Liu Minghu(Nanjing Engineering Institute of Aircraft System,AVIC,Nanjing Jiangsu 211106,China)

机构地区：[1]中国航空工业集团公司金城南京机电液压工程研究中心,江苏南京211106

出　　处：《金属热处理》2020年第5期176-179,共4页Heat Treatment of Metals

摘　　要：材料为2Cr13钢的某轴承壳体,其内孔表面渗氮后经研磨(或珩磨),渗氮层表面不同程度地出现肉眼可见的"麻点",如针尖大小,为小面积剥落,造成了多批产品报废。通过对其可能的影响因素(材料、脆性、应力、工艺等)逐一分析并进行对比试验,最终确定剥落的生成原因与四氯乙烯的使用有关。Many pockmarks were detected on the inner hole surface after grinding of a nitrided bearing housing made of stainless steel 2Cr13.The pockmarks were a lot of small area of exfoliation,as big as a needle,and could be seen by the naked eye. By analyzing the possible influencing factors such as materials, brittleness, stress and process, it is determined that the pockmark failure is caused by perchloroethylene added in nitriding process.

关 键 词：不锈钢 渗氮 麻点 剥落 四氯乙烯 

分 类 号：TG156.82[金属学及工艺—热处理]