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논문 기본 정보

자료유형
학술저널
저자정보
Peilei Zhang (Shanghai University of Engineering Science) Zhiqiang Liu (Shanghai University of Engineering Science) Hua Yan (Shanghai University of Engineering Science) Zhishui Yu (Shanghai University of Engineering Science)
저널정보
대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.27 No.12
발행연도
2021.12
수록면
5,285 - 5,298 (14page)
DOI
10.1007/s12540-020-00932-1

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A longitudinally varying magnetic field (MF) was applied during cold metal transfer (CMT) welding of Al alloys. The effectof MF on the welding process, macrostructure, microstructure and properties of weld beads was studied. The results showedthat the application of MF led to arc expansion and rotation, the droplet transfer frequency decreased, the droplet volumebecame larger, and the droplets deflected. When the coil current was between 0 and 5 A, the weld beads porosity decreasedfrom 4.47 to 0.26%. And when the coil current was increased to 8 A, the porosity of weld beads also increased to 2.84%. MFreduced the weld depth, wetting angle and weld reinforcement, and increased weld width. With the increase of coil current,the width of primary dendrite arms decreased from 7.75 to 5.01 μm. The area occupied by the Al?Si eutectic was enlarged,and the eutectic was refined. It was also found that the MF slightly increased the hardness of the weld beads, and the hardnessdistribution was more uniform.

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