摘要
通过对21-4N钢添加微量稀土Ce元素,分析不同Ce含量对21-4N钢铸态、锻态下的显微组织的影响。结果表明:适量稀土Ce元素的加入,可以显著细化铸态树枝晶间距、"类珠光体"团及一次碳化物M7C3,改善铸态"类珠光体"形貌,减少一次碳化物数量;显著细化锻态奥氏体晶粒尺寸。当Ce含量过高,铸态"类珠光体"团粗化、一次碳化物数量增加;锻态奥氏体粗化。Ce元素含量0.011%≤w(Ce)≤0.015%时,21-4N钢的铸态"类珠光体"团尺寸小、形状球化,一次碳化物细小且数量增加;锻态奥氏体晶粒细小。
The influence of Ce on microstructure and carbide of austenitic stainless steel 21-4 N both at as-cast and as-forged states were analyzed in this paper.The results show that the dendritic spacing,pearlite-like colony and the primary carbide M7C3 of as-cast steel can be refined significantly by adding appropriate rare earth Ce elements.The morphology of as-cast pearlite-like colony is improved and the number of primary carbides M7C3 is reduced significantly.Moreover,the grain size of forged austenite is remarkably refined.But the pearlite-like colonies of as-cast steel coarsens and primary carbides increase,therefore as-forged austenite coarsens when Ce content is too high.When Ce content of 21-4 N steel is between 0.011%and 0.015%,as-cast pearlite-like colonies are smaller and spheroidized,primary carbides are refined and increased,and austenite grains are refined.
作者
王洪利
杜思敏
曹美姣
张健
Wang Hongli;Du Simin;Cao Meijiao;Zhang Jian(Pangang Group Research Institute Co.,Ltd.,Panzhihua 617000,Sichuan,China;Chengdu Advanced Metal Materials Industrial Technology Institute Co.,Ltd.,Chengdu 610300,Sichuan,China;State Key Laboratory of Marine Equipment Made of Metal Material and Application,Anshan 114009,Liaoning,China;Changcheng Special Steel Company,Pangang Group,Jiangyou 621701,Sichuan,China)
出处
《钢铁钒钛》
CAS
北大核心
2020年第1期119-124,共6页
Iron Steel Vanadium Titanium
