计云萍,刘新华,刘宗昌,任慧平

• 1:内蒙古科技大学材料与冶金学院

摘要(Abstract)：

以添加稀土的20MnCrNi2Mo铸钢为研究对象,采用L78 RITA淬火热膨胀仪测定了其连续冷却转变(CCT)曲线,为制定合适的贝氏体转变工艺提供依据。采用激光扫描共聚焦显微镜(LSCM),并配以高温热台,对试验钢贝氏体形核-长大过程进行原位观察。结果表明,添加稀土20MnCrNi2Mo铸钢的贝氏体铁素体优先在晶界形核,也可以在晶内形核;贝氏体铁素体片可以向晶内生长,也可侧向激发形核长大,最终生长为不同形貌的贝氏体。贝氏体形核区域具有多样性,生长过程呈现复杂性。

关键词(KeyWords)： 贝氏体相变;形核-长大;CCT曲线;激光扫描共聚焦显微镜;热台

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51261018);; 内蒙古自然科学基金(2012MS0805);; 内蒙古科技大学创新基金(2011NCL037)

作者(Author): 计云萍,刘新华,刘宗昌,任慧平

DOI: 10.13289/j.issn.1009-6264.2014.11.006

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