周荣锋,蒋业华,周荣

• 1:昆明理工大学机电工程学院

摘要(Abstract)：

采用过流冷却法制备高铬铸铁半固态浆料,对初生相细化球化机理进行研究。结果表明,在冷却体作用下,熔体中大量快速形核长大的初生相通过物理、冶金作用分解和熟化成细小的等轴状颗粒而达到细化球化。树枝状初生奥氏体通过枝晶臂熔断和主干弯曲折断而细化球化,早期以枝晶臂熔断为主,后期以主干在剪切力作用下弯曲折断为主;高硬度的M7C3型初生碳化物通过横向折断和纵向分裂而达到细化球化,早期以横向折断为主,后期以纵向分裂为主。

关键词(KeyWords)： 高铬铸铁;过流冷却;初生奥氏体;初生碳化物;细化球化

Abstract:

Keywords:

基金项目(Foundation): 高等学校博士学科点专项科研基金(20060674002);; 云南省自然科学基金(2004E0018M,2005E0013Q);; 云南省教育厅科学研究基金(5Y0662D);; 校博士启动基金

作者(Author): 周荣锋,蒋业华,周荣

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