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本文用ML—10型磨料磨损试验机,研究了Mo-B系不同含碳量的贝氏体钢,在不同冷却速度和等温热处理条件下,组织对抗磨损性能的影响。结果得出,低碳钢板条状马氏体抗磨损性能最好,下贝氏体次之,粒状贝氏体较差。中碳钢下贝氏体的抗磨性能高于上贝氏体。高碳钢下贝氏体和下贝氏体与马氏体的混合组织的抗磨损性能高于上贝氏体和淬火马氏体。在等温转变条件下,高碳钢下贝氏体的抗磨损性能最好,中碳下贝氏体次之,再次为低碳下贝氏体。硬度相同时,等温处理钢的抗磨损性能明显地高于淬火回火钢。
In this paper, with ML-10 abrasive wear tester, the effect of microstructure on wear resistance of bainitic steels with different carbon content in Mo-B system under different cooling rates and isothermal heat treatment conditions was studied. The results show that the low-carbon steel strip martensite wear resistance best, followed by lower bainite, granular bainite poor. Carbon steel bainite lower antiwear performance than bainite. High-carbon steel lower bainite and lower bainite and martensite mixed tissue wear resistance higher than the upper bainite and quenched martensite. Under the condition of isothermal transformation, the lower bainite of high-carbon steel has the best wear resistance, the lower bainite of middle carbon and the lower bainite of low carbon. When the hardness is the same, the wear resistance of the isothermal treated steel is obviously higher than that of the quenched and tempered steel.