Metal magnetic memory signals from surface of low-carbon steel and low-carbon alloyed steel  

作　　者：董丽虹 徐滨士 董世运 叶明慧 陈群志 王丹 尹大伟 

机构地区：[1]National Key Laboratory for Remanufacturing,Armored Force Engineering Institute [2]Department of Basic Course,Ordnance Engineering College [3]Beijing Aeronautical Technology Research Center

出　　处：《Journal of Central South University of Technology》2007年第1期24-27,共4页中南工业大学学报（英文版）

基　　金：Projects(50235030, 50505052) supported by the National Natural Science Foundation of China

摘　　要：In order to investigate the regularity of metal magnetic signals of ferromagnetic materials under the effect of applied load, the static tensile test of Q235 steel and 18CrNiWA steel plate specimens were conducted and metal magnetic memory signals of specimens were measured during the test process. The influencing factors of metal magnetic memory signals and the relationship between axial applied load and signals were analyzed. The fracture and microstructure of the specimens were observed. The results show that the magnetic signals corresponding to the measured points change linearly approximately with increasing axial load. The microstructure of Q235 steel is ferrite and perlite, whereas that of 18CrNiWA steel is bainite and low-carbon martensite. The fracture of these two kinds of specimens is ductile rupture; carbon content of specimen materials and dislocation glide give much contribution to the characteristics of magnetic curves.In order to investigate the regularity of metal magnetic signals of ferromagnetic materials under the effect of applied load, the static tensile test of Q235 steel and 18CrNiWA steel plate specimens were conducted and metal magnetic memory signals of specimens were measured during the test process. The influencing factors of metal magnetic memory signals and the relationship between axial applied load and signals were analyzed. The fracture and microstructure of the specimens were observed. The results show that the magnetic signals corresponding to the measured points change linearly approximately with increasing axial load. The microstructure ofQ235 steel is ferrite and perlite, whereas that of 18CrNiWA steel is bainite and low-carbon martensite. The fracture of these two kinds of specimens is ductile rupture; carbon content of specimen materials and dislocation glide give much contribution to the characteristics of magnetic curves.

关 键 词：metal magnetic memory low-carbon steel low-carbon alloyed steel applied load magnetic signals curve FRACTURE microstructure 

分 类 号：TG115[金属学及工艺—物理冶金]