Effect of cryogenic rolling and annealing on the microstructure evolution and mechanical properties of 304 stainless steel

作     者：Jin-tao Shi Long-gang Hou Jin-rong Zuo Lin-zhong Zhuang Ji-shan Zhang 

作者机构：State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing Beijing 100083 China 

出 版 物：《International Journal of Minerals,Metallurgy and Materials》 (矿物冶金与材料学报（英文版）)

年 卷 期：2017年第24卷第6期

页      面：638-645页

核心收录：

学科分类：080503[工学-材料加工工程] 0709[理学-地质学] 0819[工学-矿业工程] 08[工学] 0806[工学-冶金工程] 0708[理学-地球物理学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 0802[工学-机械工程] 0702[理学-物理学] 0801[工学-力学（可授工学、理学学位）] 080201[工学-机械制造及其自动化] 

基　　金：financially supported by the National Key Project of Research and Development Program of China (No. 2016YFB0300801) the National Natural Science Foundation of China (No. 51401016) State Key Laboratory for Advanced Metals and Materials of China 

主　　题：stainless steel cryogenic rolling annealing microstructural evolution mechanical properties recrystallization 

摘      要：Metastable 304 austenitic stainless steel was subjected to rolling at cryogenic and room temperatures, followed by annealing at different temperatures from 500 to 950°C. Phase transition during annealing was studied using X-ray diffractometry. Transmission electron microscopy and electron backscattered diffraction were used to characterize the martensite transformation and the distribution of austenite grain size after annealing. The recrystallization mechanism during cryogenic rolling was a reversal of martensite into austenite and austenite growth. Cryogenic rolling followed by annealing refined grains to 4.7 μm compared with 8.7 μm achieved under room-temperature rolling, as shown by the electron backscattered diffraction images. Tensile tests showed significantly improved mechanical properties after cryogenic rolling as the yield strength was enhanced by 47% compared with room-temperature rolling.