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基于耐热耐磨钢的工况要求,合理设计钢的化学成分,采用普通铸造法制备出了新型高碳高铬低镍合金铸钢,并对其铸态组织和力学性能进行了研究。结果表明:该钢的铸态组织由块状奥氏体和沿奥氏体晶界呈网状分布的碳化物组成,而奥氏体内未出现弥散析出相;该钢铸态具有好的抗冲击性,其韧度为5.4 J/cm2,但其硬度有待提高,洛氏硬度仅为35 HRC。
Based on the working conditions of the heat-resistant and wear-resistant steel, the chemical composition of the steel was reasonably designed and a new type of high-carbon, high-chromium and low-nickel alloy cast steel was prepared by the common casting method. The as-cast microstructure and mechanical properties were also studied. The results show that the as-cast microstructure of the steel consists of massive austenite and carbides distributed in the reticular distribution along the grain boundaries of austenite, while no dispersed phase appears in the austenite. The as-cast steel has good resistance Impact, the toughness of 5.4 J / cm2, but its hardness needs to be improved, Rockwell hardness of only 35 HRC.