20Cr2Ni4A钢齿轮的热处理  

Heat Treatment of 20Cr2Ni4A Steel Gear

作　　者：施家山 邱光明 施文静[2] 

机构地区：[1]浙江永嘉县一泰热处理有限公司,浙江永嘉325102 [2]安徽合力股份有限公司,安徽合肥230022

出　　处：《热处理》2013年第2期69-71,共3页Heat Treatment

摘　　要：一种20Cr2Ni4A钢齿轮要求进行渗碳、淬火处理,达到0.8～1.0 mm的渗层深度、58～62 HRC的表面硬度和34～45 HRC的心部硬度。试验了3种渗碳淬火工艺,最后确定的热处理工艺为:920℃渗碳4 h缓冷,650℃高温回火4 h炉冷至350℃空冷,810℃保温3 h油淬,190℃回火两次。A type of 20Cr2Ni4A steel gear is to be carburized and hardened to reach the case depth of 0.8 to 1.2 mm, surface hardness of 58 to 62 HRC and core hardness of 34 to 45 HRC. Based on three trial carburizing and hardening practices, finally determined heat treatment process of the gear consists of carburizing at 920℃ for 4 h and slow cooling, high tempering at 650 ℃ for 4 h, furnace cooling to 350 ℃ and then air cooling, and heating at 810 ℃ for 3 h and oil quenching followed by two separate tempering treatments at 190℃.

关 键 词：渗碳 淬火 硬度 

分 类 号：TG162.73[金属学及工艺—热处理]