Effect of heat treatment on the microstructure and mechanical properties of structural steel–mild steel composite plates fabricated by explosion welding

作     者：En-ming Zhang Yi-ming Zhao Zhong-mou Wang Wen-ya Li En-ming Zhang;Yi-ming Zhao;Zhong-mou Wang;Wen-ya Li

作者机构：State Key Laboratory of Solidification ProcessingShaanxi Key Laboratory of Friction Welding TechnologiesSchool of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi'an710072China 

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：2020年第27卷第8期

页      面：1115-1122页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0802[工学-机械工程] 080201[工学-机械制造及其自动化] 

基　　金：financially supported by the State Key Laboratory of Solidification Processing of Northwestern Polytechnical University(2019-QZ-01) 

主　　题：explosion welding steel composite plate microstructure mechanical properties 

摘      要：Two dissimilar steel plates,structural steel and mild steel,were joined by explosion welding to form a *** composite was then heat-treated by quenching at 840℃ for 30 min followed by tempering at 200℃ for 3 *** microstructure was investigated under an optical microscope and a scanning electron *** mechanical properties were measured using Vickers microhardness and Charpy impact *** results show a deformed interface with typical wave features at the welding zone,but no defects were ***,the ferrite in the parent plate in the weld zone was elongated due to the strong plastic deformation from the *** heat treatment,the hardness of the flyer plate(structural steel)was over HV0.2800,while that of the parent plate(mild steel)was *** increase in hardness was due to the presence of ***,the average impact energy was increased from 18.5 to 44.0 J following heat treatment;this is because of the formation of recrystallized grains at the weld interface,which is due to the dynamic recovery and local recrystallization,and the strong elemental diffusion that occurred between the two plates.