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논문 기본 정보

자료유형
학술저널
저자정보
W. P. Xie (Nanjing University of Aeronautics and Astronautics) R. P. Liu (Nanjing University of Aeronautics and Astronautics) H. Wang (Nanjing University of Aeronautics and Astronautics) Y. H. Wei (Nanjing University of Aeronautics and Astronautics)
저널정보
대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.28 No.5
발행연도
2022.5
수록면
1,184 - 1,194 (11page)
DOI
10.1007/s12540-021-00981-0

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With increasing requirements of continuous arc additive remanufacturing for robots in mold repair, the alloy and slag systemsin the traditional flux-cored wire have to be further improved. Especially in order to realize welding automation, the contentof slag must be cut down to decrease the time of removing the slag during the deposition. In this paper, Al?Mg and ferrotitaniumare used as deoxidizer to make up the side effect caused by lessening the slag. Six kinds of micro-slag gas-shieldedflux-cored wires with different content of deoxidizer based on the commercial cored wire RMD535 were developed. Theeffect of deoxidizer on microstructure and mechanical properties of micro-slag gas-shielded flux-cored wires were studied. The results demonstrated that the microstructure of deposited metal was mainly composed of acicular ferrite and proeutectoidferrite. With the increase of deoxidizer content, the toughness increases and then decrease, reaching the maximum of 33.45 Jand 35.02 J at Ag?Mg alloy and ferrotitanium content of 1.2% and 1.8%. The hardness is constantly increasing. Six kindsof welding wire had different properties, mainly because of the different characteristics of the inclusions in the depositedmetal. The spherical inclusion was the result of deoxidation by Al?Mg alloy or ferrotitanium and the diameter in range of0.4?0.8 μm were effective for acicular ferrite nucleation. However, inclusions predominantly TiOXwere more effective thanthat of Al2O3in the same size. The present work provided an effective way to improve the impact toughness of depositedmetal by the control of deoxidizer content.

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