Hot deformation behavior of Super304H austenitic heat resistant steel

Shu-ping Tan~(1)),Zhen-hua Wang~(2)),Shi-chang Cheng~(3)),Zheng-dong Liu~(3)),Jie-cai Han~(1)), and Wan-tang Fu~(2)) 1) School of Astronautics,Harbin Institute of Technology,Harbin 150001,China 2) State Key Laboratory of Metastable Materials Science and Technology,Yanshan University,Qinhuangdao 066004,China 3) Central Iron and Steel Research Institute,Beijing 100081,China

摘 要：<正>The hot compression tests of Super304H austenitic heat resistant steel were carried out at 800-1200℃and 0.005-5 s^-1 using a Gleeble 3500 thermal-mechanical simulator,and its deformation behavior was analyzed.The results show that the flow stress of Super304H steel decreases with the decrease of strain rate and the increase of deformation temperature;the hot deformation activation energy of the steel is 485 kJ/mol.The hot deformation equation and the relationship between the peak stress and the deformation temperature and strain rate is obtained.The softening caused by deformation heating cannot be neglected when both the deformation temperature and strain rate are higher.

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