低合金耐磨钢板NM600组织及其磨损性能研究

对一种新型高级别低合金高强度耐磨钢NM600进行热处理实验，研究了淬火温度和回火温度对实验钢组织和力学性能的影响，并分析了最优工艺条件下实验钢的磨损性能。结果表明：当淬火温度为880 ℃，回火温度为180 ℃时，实验钢力学性能最优，其中维氏硬度、抗拉强度、伸长率和-40 ℃冲击功分别为628 HV、2 000 MPa、7.3%、27.8 J，实验钢组织为典型的板条马氏体结构，马氏体板条内部及其板条界面上分布着细小均匀的碳化物。三体冲击磨损实验结果表明：工艺优化后的实验钢的耐磨性能与瑞典SSAB公司生产的HARDOX600相近，是NM400钢的1.376倍，抗磨损性能良好。

Microstructure and wear resistance behavior of low alloy abrasion resistant steel plate NM600

After the heat treatment of high strength low alloy abrasion- resistant steel NM600, the effect of quenching and tempering temperature on mechanical property of NM600 and wear resistance of three- body impact abrasive were investigated. The results showed that quenching at 880 ℃ and tempering at 180 ℃ could lead to optimal mechanical property，which the Vickers- hardness, tensile strength, elongation and -40 ℃ impact toughness respectively were 628 HV, 2 000 MPa, 7.3% and 27.8 J. The microstructure was consist of typical lath- martensite and many tiny carbides were equidistributed in inter- lath or boundaries of martensite, which enhance the complexity of the overall investigation. Three- body impact abrasive wear results showed that the tested steel deliver similar abrasion resistant performance with Sweden product SSAB HARDOX600 after optimized technology, 1376 times higher than that of NM400, presenting good performance of wear resistance.