马玉喜,宋新莉,练容彪,刘彪,贾涓

• 1:武汉科技大学耐火材料与冶金国家重点实验室
• 2:武汉钢铁集团公司武钢研究院

摘要(Abstract)：

对两种不同Ti含量的低合金耐磨钢进行淬火后在160~540℃温度区间回火处理。结合冲击性能、力学性能及磨损实验的测试结果,利用SEM,TEM等对不同热处理状态实验钢的微观组织及析出相的分析,研究了回火工艺及组织演变对性能影响。结果表明,两组实验钢在190℃回火,均得到回火马氏体,回火马氏体形态仍然为板条状,板条间有(Nb,Ti,V)碳化物析出;而500℃回火时,马氏体板条消失,得到回火索氏体组织。两组实验钢淬火后在190℃与500℃回火时-20℃冲击功出现峰值,分别为40 J与60 J,其中Ti含量为0.09%的2号实验钢淬火及在190℃回火后,综合力学性能最佳,其屈服强度为1218 MPa,抗拉强度1507 MPa、硬度429.5 HV,伸长率17.5%,抗磨损性能也优于Ti含量较高(0.18%)的1号实验钢。

关键词(KeyWords)： 耐磨钢;马氏体;回火温度;碳化物析出

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51575408)

作者(Author): 马玉喜,宋新莉,练容彪,刘彪,贾涓

DOI: 10.13289/j.issn.1009-6264.2016-X247

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