LM1,LM2工模具钢在链条片推刀上的应用  

Application of LM1 and LM2 die steel in push proach of chain slice

作　　者：彭淑君[1] 杨永泉[1] 

机构地区：[1]邵阳纺织机械有限责任公司,湖南邵阳422000

出　　处：《金属热处理》2013年第1期134-138,共5页Heat Treatment of Metals

摘　　要：用W6Mo5Cr4V2钢做50Mn钢链条片推刀出现早期崩刃,对脆断原因进行了失效分析。碳化物偏聚是失效的主要原因。改用LM1,LM2新型模具钢,对其锻造、热处理、表面强化技术进行了探索。解决了推刀早期失效问题,推刀使用寿命提高了32～34倍,取得了显著的经济效益。Early tipping and brittle failure of 50Mn steel chain slice push type broaches made of W6Mo5Cr4V2 steel was analyzed.It was concluded that the early failure was mainly caused from carbide accumulation and segregation.Therefore,replacing the W6Mo5Cr4V2 steel by the new die steel（LM1 and LM2）,deep exploration on forging,heat treatment and surface hardening was made.The early failure problem is thus solved.The service life of push type broaches is 32 to 34 times prolonged and remarkable economic benefits are achieved.

关 键 词：推刀 模具钢 碳化物 晶粒度 离子渗氮 

分 类 号：TG142.45[一般工业技术—材料科学与工程]