摘要
对不同合金元素含量的低合金耐磨钢进行淬火加回火热处理后,测试力学性能及-40℃冲击吸收能量,借助SEM、TEM等分析组织及析出相,研究合金元素对低合金耐磨钢的组织和性能的影响。结果表明:含有Ni、Cu、Cr、Mo等合金元素的试验钢淬火及190℃低温回火后均得到板条状马氏体组织,马氏体板条间有细小碳化物析出相。而没有添加Ni、Cu及少量添加Cr、Mo元素的试验钢淬透性降低,淬火及低温回火组织为马氏体及少量铁素体。添加Ni、Cu、Cr、Mo等合金元素的试验钢淬火及低温回火后得到较好的综合力学性能,最佳性能为屈服强度1218 MPa,抗拉强度1507 MPa,硬度429.5 HV,-40℃冲击吸收能量27.7 J。
Low alloy wear-resistant steels with different alloy elements were quenched and tempered, and mechanical properties and impact energy at -40 ℃ were measured. Microstructure and precipitates were analyzed by SEM and TEM. The test results show that the lath martensite is obtained for the steels added alloy elements of Ni, Cu, Cr and Mo. The martensite and ferrite are obtained for the steel without the elements of Ni and Cu and with small amount of Cr and Mo. The fine carbides along the martensite lath and inside the steel matrix are found for the steel tempered at 190 ℃. The comprehensive mechanical properties are obtained for the steels added alloy elements of Ni, Cu, Cr and Mo. The best properties of the tempered steel added alloy elements of Ni, Cu, Cr and Mo are that the yield strength, tensile strength, hardness and impact energy of -40 ℃ is 1218 MPa, 1507 MPa, 429.5 HV and 27.7 J, respectively.
作者
练容彪
宋新莉
马玉喜
刘彪
Lian Rongbiao Song Xinli Ma Yuxi Liu Biao(State Key Laboratory of Refractory Materials and Metallurgy, Wuhan University of Science and Technology, Wuhan Hubei 430081, China Wuhan Iron and Steel Research Institute, Wuhan Iron and Steel Group Company, Wuhan Hubei 430080, China)
出处
《金属热处理》
CAS
CSCD
北大核心
2016年第12期47-51,共5页
Heat Treatment of Metals
基金
国家自然科学基金(51575408)
关键词
低合金耐磨钢
合金元素
组织
性能
low alloy wear-resistant steel
alloy elements
microstrueture
mechanical properties
