GCr15轴承钢球化退火工艺研究  

Spheroidizing of GCr15 Bearing Steel

作　　者：王一谦[1] 黄贞益[1] 李佑河 章小峰[1] 

机构地区：[1]安徽工业大学材料科学与工程学院,安徽马鞍山243002 [2]南京钢铁公司中型厂,江苏南京210035

出　　处：《热处理》2012年第6期38-41,共4页Heat Treatment

基　　金：国家科技支撑计划项目(2007DAE30B01)

摘　　要：对GCr15轴承钢进行了不同温度和不同时间的球化退火,测定了所获得的组织和硬度,以探索能取代传统球化退火工艺的新工艺。结果表明,GCr15钢经760℃保温2 h后炉冷至500℃空冷,其球状珠光体为2～4级,硬度为188 HB,符合有关标准的要求,且缩短了工艺周期,提高了生产效率。GCr15 bearing steel was spheroidized at different temperatures for different lengths of time, and the resulting mierostrueture and hardness were also measured to explore a new spheroidizing process to replace conventional spheroidizing . The results show that after GCrl5 steel is spheroidized by heating at 760 ℃ for 2 h , followed by furnace-cooling to 500℃ and air-cooling, the spheroidal pearlite is No. 2 to No. 4 and the hardness is 188 HB, which conform with the requirements of related standard, with the process time shorted , therefore the productivity increased.

关 键 词：CGr15钢 球化退火 显微组织 硬度 

分 类 号：TG156.21[金属学及工艺—热处理]