变质处理对高碳高铬合金钢铸态组织与性能的影响  

Effect of Modification on Properties and Cast Microstructure of High Carbon-chromium Alloy Steel

作　　者：时晓飞[1] 宋延沛[1] 魏雪[1] 

机构地区：[1]河南科技大学材料科学与工程学院,河南洛阳471003

出　　处：《稀土》2013年第2期52-55,共4页Chinese Rare Earths

基　　金：河南省科技创新杰出人才计划资助项目(094200510019)

摘　　要：采用两种以稀土为主的复合变质剂对高碳高铬合金钢进行变质处理,研究结果表明,两种变质剂都可以使高碳高铬合金钢的初生奥氏体得到明显细化,网状碳化物有明显断开趋势,碳化物转变为片状和块状,在保持高碳高铬合金钢硬度的同时,其韧性得到了较大改善。高碳高铬合金钢经0.2%RE+0.2%Nb和0.1%RE-Mg+0.2%Nb变质处理后,与未变质处理的试验钢相比其硬度和冲击韧性分别提高了4.8%,33.8%和4.6%,38.9%。Two RE-containing complex modifying agents were applied to modify the high carbon - chromium alloy steel. The results show that both of the modificators added in the high carbon - chromium alloy steel could refine the primary austen- ite effectively and the carbide network had obvious disconnect trend with the mesh form to flake and block ones. The high car- bon - chromium alloy steel possessed the high hardness and the toughness improved meanwhile. Compared with non - modified alloy steel, the hardness and impact toughness of the steel modified by 0.2% RE ＋ 0.2% Nb were raised 4.8% and 33.8%, and the steel modified by 0.1% RE - Mg ＋ 0.2% Nb were raised 4.6% and 38.9%.

关 键 词：高碳高铬合金钢 变质处理 冲击韧性 

分 类 号：TG243[金属学及工艺—铸造]