洁净燃料发动机阀座热处理工艺研究  

Study on Heat Treatment Process of Valve Seat of Clean Fuel Engine

作　　者：张智 罗成 肖紫圣 徐胜良 陶诗雨 ZHANG Zhi;LUO Cheng;XIAO Zisheng;XU Shengliang;TAO Shiyu(College of Materials Science and Engineering,Hubei University of Automotive Technology,Shiyan 442002,China)

机构地区：[1]湖北汽车工业学院材料科学与工程学院,湖北十堰442002

出　　处：《热加工工艺》2020年第12期128-131,134,共5页Hot Working Technology

基　　金：湖北省科技支撑项目(2014BAA065);湖北汽车工业学院大学生创新基金资助项目(SJ201628)。

摘　　要：通过对高速钢粉末冶金气门阀座进行热处理试验,研究了淬火温度和回火温度对气门阀座组织与性能的影响。结果表明:随着淬火温度和回火温度的升高,气门阀座的硬度先增大后减小,耐磨性能先变好后变差。最终得到气门阀座的最优热处理工艺为1220℃的淬火温度和550℃的回火温度,在此工艺下其硬度达到50.62 HRC,30 min磨损重量为0.0334 g。Through the heat treatment test of high speed steel powder metallurgy valve seat,the effects of quenching temperature and tempering temperature on micro-structure and properties of the valve seat.The results show that,with the increase of quenching temperature and tempering temperature,the macro hardness of valve seat first increases and then decreases,and the wear-resisting performance first gets better and then gets poor.Finally,the experiment finds the optimum heat treatment process of the valve seat is quenching temperature of 1220℃and tempering temperature of 550℃,and under this process,the macro hardness reaches 50.62 HRC,the wear weight of 30 min is 0.0334 g.

关 键 词：高速钢 粉末冶金 气门阀座 热处理工艺 

分 类 号：TG156.6[金属学及工艺—热处理]