陈祥,李言祥

• 1:清华大学机械工程系清华大学先进成形制造重点实验室
• 2:清华大学机械工程系清华大学先进成形制造重点实验室 北京100084
• 3:北京100084

摘要(Abstract)：

研究了稀土、钒、钛变质剂对等温淬火高硅铸钢晶粒细化的影响。结果表明,经稀土、钒、钛变质处理后,高硅铸钢中形成大量的高熔点化合物,可以强烈地促进非均质形核,细化高硅铸钢的奥氏体晶粒;同时变质剂的加入可以明显提高钢液的过冷度,促进形核、细化奥氏体晶粒。高硅铸钢等温淬火组织中由一次结晶形成的树枝晶已经完全消除,全部转变为等轴晶;385℃等温时高硅铸钢淬火组织中的块状残余奥氏体的量明显减少,由未变质前的31.9%降低到5.5%,块状残余奥氏体的尺寸也明显减小。

关键词(KeyWords)： 变质;稀土元素;晶粒细化;等温淬火;高硅;铸钢

Abstract:

Keywords:

基金项目(Foundation): 清华大学实验室开放基金(092701123)

作者(Author): 陈祥,李言祥

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