Effect of Annealing Temperature on Microstructure and Mechanical Property of Hot-rolled M390
WANG Tiejun1,2, YANG Bo3, LIANG Chen1,2, CHE Hongyan1,2, QIN Wei1,2, CAO Rui3
1 Advanced Technology & Materials Co., Ltd., China Iron & Steel Research Institute Group, Beijing 100081, China 2 Engineering and Technology Research Center of Hot Isostatic Pressing, Zhuozhou 072750, China 3 State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metal, Lanzhou University of Technology,Lanzhou 730050, China
Abstract: Hot-rolled M390 high-carbon and high-chromium martensitic stainless steel was annealed at 650 ℃, 750 ℃ and 850 ℃. Therefore, the changes of microstructure and mechanical properties of M390 under different initial rolling temperatures and different annealing temperatures after hot rolling were studied by thermal expansion machine, Vickers hardness tester, X-ray diffractometer and scanning electron microscope (SEM). The results show that the strength of M390 deteriorates but the plasticity increases significantly with the increase of annealing temperature after hot rolling, while the carbide size becomes larger and the number of carbides decreases. After initial rolling at a high temperature of 1 200 ℃ and then annealing at a high temperature of 850 ℃, M390's ferrite matrix uniformly distributed with fine spherical carbide. At this time, the best comprehensive mechanical properties with tensile strength of 920 MPa and elongation of 0.83% are obtained, which was facilitates to the subsequent processing and heat treatment of the material.
王铁军, 杨博, 梁晨, 车洪艳, 秦巍, 曹睿. 退火温度对热轧态M390组织与性能的影响[J]. 材料导报, 2020, 34(12): 12122-12126.
WANG Tiejun, YANG Bo, LIANG Chen, CHE Hongyan, QIN Wei, CAO Rui. Effect of Annealing Temperature on Microstructure and Mechanical Property of Hot-rolled M390. Materials Reports, 2020, 34(12): 12122-12126.
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