20CrMnTi钢制凸轮轴在井式炉气体渗碳后裂纹的探讨  

Discussion about Crack of 20CrMnTi Steel Camshaft after Gas Garburizing

作　　者：温丽娜 

机构地区：[1]江西同欣机械制造股份有限公司,江西广丰334600

出　　处：《热处理技术与装备》2016年第6期42-48,共7页Heat Treatment Technology and Equipment

摘　　要：我厂20CrMnTi钢制凸轮轴渗碳淬火后出现严重的裂纹和断裂,经金相检验、断口分析、应力测定和渗剂成分分析等,并审查整个热处理过程后,基本认定凸轮轴在热处理过程中吸入过多的氢,氢脆是引起裂纹和断裂的主要原因。提出了改进的建议。20Cr Mn Ti steel camshaft appeared serious crack and fracture after carburizing and quenching in our factory. Through metallographic examination,fracture analysis,determination of stress and composition analysis of agent,as well as inspecting the whole heat treatment process,it is elementally recognized that the main reason of the crack and fracture is caused by hydrogen brittleness as it absorb too much hydrogen during the heat treatment.

关 键 词：凸轮轴 渗碳 淬火 氢脆 

分 类 号：TG156.35[金属学及工艺—热处理]