Preparation and Characterization of Martensitic Stainless Steel 410 Block Parts by CMT Wire Arc Additive Manufacturing
ZHU Bingyue1, LIN Jian1,*, LEI Yongping1, FU Hanguang1, ZHANG Yongqiang2, CHENG Sihua2
1 College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China 2 Shougang Research Institute of Technology, Beijing 100043, China
Abstract: Wire arc additive manufacturing (WAAM) has unique advantages of high efficiency, low cost and no limitation of forming size, showing application prospects in the field of novel manufacturing and repair. Obtaining WAAM parts with good mechanical properties and uniform microstructure is the problem that needs to be solved urgently. In this study, two kinds of martensitic stainless steel 410 (SS 410) block parts were prepared by wire and arc additive manufacturing system based on cold metal transfer (CMT). The results of optical microscope (OM), scanning electron microscope (SEM) and mechanical properties test showed that the as-deposited parts with uniform microstructure, average hardness of 530HV, average tensile strength of 1 196 MPa and uniform elongation can be obtained. The mechanical properties of as-deposited parts were discussed, and compared with wrought and laser additive manufacturing H13 hot work die steel. This work analyzed reasons for the difference between the properties of WAAM parts and forgings, examined the feasibility of using as-deposited stainless steel 410 in repairing, and explained the ways to improving mechanical properties of WAAM parts.
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