Hot tearing susceptibility of Fe-20.96Cr-2.13Ni-0.15N-4.76Mn-0.01Mo duplex stainless steel

作     者：Zhi-qiang Wei Xiang-ru Chen Hong-gang Zhong Qi-jie Zhai Gang Wang 

作者机构：State Key Laboratory of Advanced Special Steel&Shanghai Key Laboratory of Advanced Ferrometallurgy&School of Materials Science and EngineeringShanghai UniversityShanghai 200072China 

出 版 物：《Journal of Iron and Steel Research International》 (国际钢铁研究杂志)

年 卷 期：2017年第24卷第4期

页      面：421-425页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：the financial support from the National Natural Science Foundation of China(Nos.51404150 51227803 and 51504148) 

主　　题：Duplex stainless steel Hot tearing Solidification Contraction stress Core temperature 

摘      要：The hot tearing susceptibility of a Fe-20.96Cr-2.13Ni-0.15N-4.76Mn-0.01 Mo duplex stainless steel was investigated using method of constrained solidification shrinkage in one *** apparatus for realtime measuring the contraction stress and temperature during solidification was developed,which can achieve the in-situ observation of melting and solidification and avoid the large temperature gradient of casting under the condition of *** results show that the contraction stress increases significantly when the core temperature of casting reaches the liquidus *** contraction stress is released when the core temperature of casting reaches 1456°*** this temperature,the hot tearing susceptibility of duplex stainless steel is the *** decreasing the core temperature to 1363°C,the slope of contraction stress increases,which is related to the ferrite-to-austenite transformation.