回火工艺对AerMet100超高强钢组织与力学性能的影响  

Effects of Tempering Process on Microstructure and Mechanical Properties of AerMet100 Ultra High Strength Steel

作　　者：冯永[1] FENG Yong(School of Civil Engineering,Changchun University of Architecture,Changchun 130607,China)

机构地区：[1]长春建筑学院土木工程学院,吉林长春130607

出　　处：《热加工工艺》2020年第22期147-149,共3页Hot Working Technology

基　　金：国家自然基金资助项目(51408255)。

摘　　要：采用OM、万能试验机、摆锤冲击试验机、维氏硬度计等研究了AerMet100超高强度钢不同温度回火后的组织与力学性能。结果表明:经过880℃×1 h油淬+(450~510)℃×5 h的回火后,AerMet100试验钢的显微组织为板条马氏体。随着回火温度的升高,板条马氏体板条尺寸先减小后增大,480℃回火的试验钢马氏体板条最为细小。随着回火温度的升高,试验钢的硬度、抗拉强度先升高后降低。480℃回火试验钢的硬度、抗拉强度均达到最大值,分别为604.2 HV和1965.5 MPa,其伸长率、冲击功分别为12.4%和73.4 J。The microstructure and mechanical properties of AerMet100 ultra-high strength steel after tempering at different temperatures were studied by OM observation, universal testing machine, pendulum impact testing machine, Vickers hardness meter and so on. The results show that the microstructure of AerMet 100 test steel is lath martensite after 880 ℃×1 h quenching and oil cooling+(450-510) ℃×5 h tempering. With the increases of tempering temperature, the size of martensitic lath decreases first and then increases, and the smallest martensitic lath is obtained by tempered at 480 ℃. With the increases of tempering temperature, the hardness and tensile strength of the steel increase first and then decrease. The hardness and tensile strength of the steel tempered at 480 ℃ reach the maximum value of 604.2 HV and 1965.5 MPa respectively, and its elongation and impact energy are 12.4% and 73.4 J, respectively.

关 键 词：AERMET100钢 回火处理 组织 力学性能 

分 类 号：TG161[金属学及工艺—热处理] TG156.5[金属学及工艺—金属学]