Cu、Ni在含铜时效钢表面氧化层中的富集  

Enrichment of Cu,Ni in Surface Oxidation Layer of Copper-Bearing Age-Hardening Steel

作　　者：杨才福[1] 苏航[1] 李丽[1] 张永权[1] 

机构地区：[1]钢铁研究总院结构材料研究所,北京100081

出　　处：《钢铁》2007年第4期57-60,共4页Iron and Steel

摘　　要：研究了Cu、Ni在含铜时效钢表面氧化层中的富集规律。研究发现,无Ni含铜钢在1 100-1 200℃会形成液态富铜相,并向奥氏体晶界渗透,成为表面裂纹源。而在1 000℃和1 300℃均不形成液态富铜相。Ni加入到含铜钢中,改变了氧化层中富铜相的结构,促进了Ni-Cu富集相以颗粒状保留在氧化层内,抑制了Cu向基体中的渗透,从而改善了含铜时效钢的热脆性问题。Enrichment of Cu, Ni in surface oxidation layer of copper-bearing age-hardening steel was investigated. The resuits showed that copper enriched liquid phase is formed at reheating temperature of 1 100-1 200 ℃, and the liquid Cu enriched phase is penetrated along austenite grain boundary leading to surface cracking. But copper enriched liquid phase is not formed at reheating temperature of 1000 ℃ and 1 300 ℃. The structure of copper-rich phase in scale is changed by addition of nickel, and Ni-Cu enriched phase is stayed in oxidized layer in form of granular particle which inhibits copper enriched phase from penetration into the base metal.

关 键 词：铜时效钢 表面氧化 热脆性 

分 类 号：TG174[金属学及工艺—金属表面处理]