陈建亭,吴晓春,闵永安,汪宏斌

• 1:上海大学材料科学与工程学院
• 2:上海大学材料科学与工程学院
• 3:上海大学材料科学与工程学院
• 4:上海大学材料科学与工程学院 上海200072

摘要(Abstract)：

采用Uddeholm自约束热疲劳试验机研究了新钢种(SDH2)和ASSAB 8407钢的热疲劳性能,结果显示,SDH2钢具有比8407钢更好的热疲劳性能,其热疲劳损伤因子相对8407钢降低30%～60%。并采用扫描电镜探寻热疲劳裂纹萌生与扩展的机制得知,热疲劳裂纹常在硅酸盐类、MnS、氧化铝和富V大块碳化物与基体的交界面上和晶界处萌生,并沿链状碳化物和晶界扩展。

关键词(KeyWords)： 热作模具钢;热疲劳性能;碳化物

Abstract:

Keywords:

基金项目(Foundation): 上海市重点学科建设项目(T0101);; 上海市科委登山项目(065211028)的资助

作者(Author): 陈建亭,吴晓春,闵永安,汪宏斌

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