新型高强耐磨钢的组织与性能研究

Microstructure and properties of the new high strength-toughness and wear-resistant cast steel

通过成分设计和优化热处理工艺,研究了耐磨铸钢的显微组织、力学性能及摩擦磨损性能。结果表明,通过成分设计和优化热处理工艺可以获得板条马氏体组织;其抗拉强度为1804.01～1904.53 MPa、断面伸长率为71%～78%、硬度为51.9～52.9 HRC、冲击韧性为18.6～28.0J/cm^2,在40N载荷、速度为50m/s的条件下摩擦10min,高铬、超高锰、新型高强韧耐磨钢进行磨损试验,分析其磨损形貌以及耐磨性能。

The microstructure, mechanical properties and tribo-wearability of the wear-resistant cast steel are investigated by designing the chemical composition and optimizing the heat treatment process. The results show that lath martensite is obtained through alloying and optimizing heat treatment process. The mechanical properties are as follows： the tensile strength1804.01 - 1904.53 MPa, the elongation 71% - 78%, the hardness 51.9 -52.9 HRC and the impact toughness 18.6 - 28.0J / cm^2. The worn morphology and wear resistance of the high chromium, super-high manganese steel and new tough wear-resistant steel are observed under conditions of 40N load, 50 m / s test speed and 10min.