论文部分内容阅读
采用OM、SEM、TEM及力学性能分析方法,研究了不同固溶温度、时间、冷却方式对10Ni3Mn Cu Al钢组织和性能的影响。结果表明:固溶空冷条件下,随着固溶温度的升高,固溶硬度呈现先升高后降低的趋势;随着固溶时间的延长,硬度峰向低温移动。在830~910℃范围之间,试验钢的屈服强度在872.7~894.2 MPa之间,抗拉强度在1313.0~1330.3 MPa之间,断后伸长率在14.0%~14.5%之间,断面收缩率在65.0%~66.3%之间,冲击功在158~180 J之间。在870℃,2 h最佳力学性能出现;固溶空冷得到以板条马氏体为主的组织,固溶炉冷得到粒状贝氏体为主的组织;板条马氏体具有比粒状贝氏体组织具更优异的硬度、强度、塑性和韧性,尤其是冲击韧性。
The effects of different solution temperature, time and cooling method on microstructure and properties of 10Ni3Mn CuAl steel were investigated by OM, SEM, TEM and mechanical properties analysis. The results show that with the increase of solution temperature, the solution hardness increases first and then decreases with the increase of solution temperature. With the increase of solution time, the hardness peak moves to low temperature. In the range of 830 ~ 910 ℃, the yield strength of the test steel is between 872.7 and 894.2 MPa, the tensile strength is between 1313.0 and 1330.3 MPa, the elongation at break is between 14.0% and 14.5%, and the reduction of area in the range of 65.0% ~ 66.3%, the impact energy is between 158 ~ 180 J. At 870 ℃, the best mechanical properties occurred at 2 h. The martensite-dominated microstructure was obtained by solution-air-cooling and the microstructure was mainly composed of granular bainite. Tissue with more excellent hardness, strength, plasticity and toughness, especially impact toughness.