GCr15SiMn钢表面激光淬火组织和性能

Microstructure and property of GCr15SiMn steel in the surface laser quenching

探讨GCr1 5SiMn轴承钢 840℃油淬火后 ,分别在 2 60℃、 35 0℃、 45 0℃、 5 5 0℃回火 ,得到不同的原始组织 ,再进行激光淬火 .发现 2 60℃回火状态 ,表面组织为粗大的针状马氏体 ,硬度值低 ;而 35 0℃、 45 0℃、 5 5 0℃回火状态 ,表面组织为“隐晶马氏体” ,硬度值高 ,其中 35 0℃回火表面硬度值高达Hv =1 0 96,淬硬层深度可达 1mm .

After oil quenching at 840℃ and temper at 260℃,350℃,450℃,550℃ again on the surface are quenched in the GCr15SiMn steel by laser The results show that it is lower hardness value and microstructure is the bulky needle state Martensite temper temperature at 260℃,otherwise, the surface hardness value high and the microstructure is thin conceal Martensite crystal temper temperature at 350℃,450℃,550℃ and hardness value is the highest( Hv =1 096)and harden layer the deepest (1mm) temper temperature at 350℃