【摘要】 采用微合金化和控制轧制获得11~12级原始晶粒的细晶合金钢,研究了该合金钢的显微组织、力学性能及摩擦磨损性能。结果表明,通过适当的热处理可获得板条马氏体+残留奥氏体+弥散分布碳化物的显微组织;其抗拉强度为1600~1936 MPa、断面收缩率为25%~45%、伸长率为8%~14%、硬度为46~52 HRC、冲击韧度为55~103 J/cm2。在250 N载荷、0.84 m/s条件下,其磨损方式主要表现为磨料磨损和轻微的粘着磨损。更多还原

【Abstract】 The fine grain steel with grain size of 11～12 grade by microalloying and controlled rolling was obtained.Its microstructure,mechanical properties and tribo-wearability were investigated.The results show that the mircostructures of lath martensite,retained austenite and dispersed carbide were obtained through proper heat treatment process.Its mechanical properties as follows:the tensile strength 1600～1936 MPa,the reduction of area 25%～45%,the elongation 8%～14%,the hardness 46～52 HRC,the impact toughness 55～103 J/cm~2.The abrasive and adhesion wear are presented mainly under condition of 250 N for load and 0.84 m/s for the test speed.更多还原