许开辉,王文焱,史士钦,谢敬佩,李继文,王爱琴,黄文君

• 1:河南科技大学材料科学与工程学院
• 2:有色金属共性技术河南省协同创新中心

摘要(Abstract)：

通过扫描电镜和透射电镜观察了Cr5钢最终热处理后的碳化物形态分布、显微组织、断口形貌,在拉伸试验机、冲击试验机和洛式硬度计上对其力学性能进行测试。结果表明:最终热处理后组织中碳化物主要以M7C3为主,且尺寸相对细小,抗拉强度和硬度值随回火温度的升高而降低,伸长率有所提高;断口形貌由小准解理刻面逐渐向韧窝转变;回火温度为520℃时,抗拉强度、冲击功和硬度值分别为1490.24 MPa、211.8 J和51.7 HRC,与最终热处理前相比,性能得到明显改善(最终热处理前材料的抗拉强度、冲击功、硬度分别为1420 MPa、146 J、49 HRC)。

关键词(KeyWords)： Cr5钢;最终热处理;显微组织;碳化物;力学性能

Abstract:

Keywords:

基金项目(Foundation): 大型铸锻件生产共性技术研究(602009102013-1);; 洛阳市科技支撑计划(1301057A)

作者(Author): 许开辉,王文焱,史士钦,谢敬佩,李继文,王爱琴,黄文君

DOI: 10.13289/j.issn.1009-6264.2015.11.019

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