真空气体淬火热处理对粉末冶金高速钢S390硬度的影响  

Effect of vacuum gas quenching heat treatment on hardness ofpowder metallurgy high speed steel S390

作　　者：雷洋 王兴 田伟 陈方 巩天喆 LEI Yang;WANG Xing;TIAN Wei;CHEN Fang;GONG Tianzhe(Shaanxi Steel Group Industrial Innovation Research Institute Co.,Ltd.,Hanzhong 723000,China)

机构地区：[1]陕钢集团产业创新研究院有限公司,汉中723000

出　　处：《理化检验（物理分册）》2024年第4期5-8,共4页Physical Testing and Chemical Analysis(Part A:Physical Testing)

摘　　要：对粉末冶金高速钢S390进行真空气体淬火热处理,初步探讨了在一定冷却压力和冷却速率条件下真空气体淬火热处理方式的可行性以及其对S390钢硬度的影响。结果表明:粉末冶金高速钢S390的有效厚度为20 mm,在冷却压力为0.8 MPa,冷却速率为3℃/s条件下,可以对S390钢进行真空淬火,该钢不会发生开裂现象;在相同条件下,四次回火后S390钢的硬度比盐浴热处理后该钢的硬度小1.2 HRC,其红硬性较盐浴热处理后小3.1~3.7 HRC。The vacuum gas quenching heat treatment of powder metallurgy high speed steel S390 was carried out.The feasibility of vacuum gas quenching heat treatment and its effect on the hardness of S390 steel under certain cooling pressure and cooling rate were discussed.The results show that the effective thickness of powder metallurgy high speed steel S390 was 20 mm.Under the condition of cooling pressure of 0.8 MPa and cooling rate of 3℃/s,S390 steel could be vacuum quenched,and the steel would not crack.Under the same conditions,the hardness of S390 steel after four times tempering was 1.2 HRC less than that after salt bath heat treatment,and its red hardness was 3.1~3.7 HRC less than that after salt bath heat treatment.

关 键 词：真空气体淬火 S390钢 红硬性 二次硬化 晶粒度 

分 类 号：TG115.5[金属学及工艺—物理冶金] TB31[金属学及工艺—金属学]