胡心彬,李麟

• 1:湖北工业大学机械工程学院
• 2:上海大学材料科学与工程学院 湖北武汉430068
• 3:上海200072

摘要(Abstract)：

采用薄膜电子衍射和萃取复型方法研究了压铸模具用钢H13钢经热疲劳后的碳化物形态和组分变化。结果表明,H13钢在热疲劳过程中表层硬度发生循环软化,循环软化主要与富铬的M23C6碳化物粒子的粗化和位错密度的降低有关。H13钢中富Cr的球状的M23C6碳化物在热疲劳过程中的成分变化是影响材料表层热疲劳循环软化的一个重要因素。球状的M23C6碳化物在热疲劳过程中,Cr和Mo等合金元素的含量在增加,而V的含量相对减少。

关键词(KeyWords)： H13钢;显微组织;碳化物粗化;热疲劳

Abstract:

Keywords:

基金项目(Foundation): 湖北省教育厅中青年基金项目(Q200714002);; 湖北工业大学高层次人才项目(2006012)

作者(Author): 胡心彬,李麟

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