李天生,王福明,李长荣,张国庆

• 1:北京科技大学钢铁冶金新技术国家重点实验室
• 2:北京科技大学冶金与生态工程学院
• 3:北京科技大学材料科学与工程学院

摘要(Abstract)：

采用Thermo-calc热力学计算软件,对SKD61钢在400～1600℃存在的平衡相进行了热力学计算,探讨了不同合金元素含量对回火析出相析出行为的影响,在此基础上设计出热处理工艺,并对热处理试样中的析出相经电解腐蚀后进行扫描电镜(SEM)和EDS研究。计算结果表明:SKD61钢中平衡析出相主要为MC、M7C3、M6C和M23C6,试样回火后的稳定析出相为MC和M23C6,合金元素V、C对MC相和M23C6相影响最大。SKD61钢热处理后的结果显示,该模具钢较合适的淬火温度区间为(1040±20)℃,回火温度的确定应以不出现粗大的M23C6碳化物相为宜。

关键词(KeyWords)： SKD61钢;析出相;热处理工艺;Thermo-calc软件

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51174020)

作者(Author): 李天生,王福明,李长荣,张国庆

DOI: 10.13289/j.issn.1009-6264.2013.05.013

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