固溶工艺对10Ni3MnCuAl钢组织和性能的影响  

Effects of Solution Treatment Process on Microstructure and Properties of 10Ni3MnCuAl Steel

作　　者：冯淑玲[1] 迟宏宵[2] 岳彩超 马党参[2] 康爱军[1] 

机构地区：[1]抚顺特殊钢股份有限公司技术中心,辽宁抚顺113001 [2]钢铁研究总院特殊钢研究所,北京100081

出　　处：《热加工工艺》2017年第14期233-236,241,共5页Hot Working Technology

摘　　要：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 solution temperature, time and cooling type on microstructure and properties of 10Ni3MnCuAl steel were studied by OM, SEM, TEM and mechanical property analysis. The results indicate that the solution hardness firstly increases and then decreases in the condition of air cooling with the increasing of solution temperature. Meanwhile, with the prolongation of the solution time, the solution hardness peak moves to lower temperature range. In the solution temperature range of 830-910℃, the yield strength is 872.7-894.2 MPa, tensile strength is 1313.0-1330.3 MPa, percentage elongation is 14.0%-14.5%, percentage reduction of area is 65.0%-66.3%, and the impact toughness is 158-180 J. The best mechanical properties of tested steel appears at 870℃ and for 2 h; After air cooling, the microstructure of tested steel is mainly composed with lath martensite, and in the furnace cooling condition, the microstructure of tested steel is composed mainly with granular bainite. The lath martensite has better hardness, strength, plasticity and toughness, especially impact toughness, compared with the granular bainite.

关 键 词：塑料模具钢 10NI3MNCUAL 固溶工艺 冷却方式 

分 类 号：TG156.9[金属学及工艺—热处理]