20CrNiMo钢拨叉热处理工艺试验  

Experiment on heat treatment process of 20CrNiMo steel shifting fork

作　　者：夏致斌[1] 

机构地区：[1]株洲职业技术学院机械工程系,湖南株洲412001

出　　处：《金属热处理》2011年第10期65-67,共3页Heat Treatment of Metals

基　　金：湖南省教育厅科研项目(09C1309)

摘　　要：采用正交试验法,研究了温度、碳势、氨流量和保温时间对拨叉表面硬度、有效硬化层深度及表层组织的影响。优选的20CrNiMo钢拨叉的热处理工艺参数为:840℃保温30 min,碳势1.0%,氨流量10 L/min。Effect of temperature,carbon potential,ammonia flow and holding time on the case hardness,effective hardened depth and surface microstructure of the shifting fork was studied by adopting orthogonal experiment.The optimized parameters of 20CrNiMo steel shifting fork are following,840 ℃ holding for 30 min,carbon potential is 1.0%,ammonia flow is 10 L/min.

关 键 词：拨叉 正交试验 有效硬化层深度 表面硬度 

分 类 号：TG156.82[金属学及工艺—热处理]