Additive Manufacturing of 1000 MPa High Strength Steel using Multi-Stranded Wire

In this paper, the additive manufacturing of TP-WER120S-G multi-stranded wire high-strength steel was carried out by using CMT linear layer-by-layer deposition (LD) and weaving welding layer-by-layer deposition (WWD), and the microstructure and mechanical properties of the additively manufactured samples were studied. The study found that the weaving welding has a more obvious stirring effect on the molten pool, and the welding seam surface of WWD is formed more flat. The microstructure of the weld bead of the two samples is lath martensite. The microstructure of the LD is relatively coarse, while the microstructure of the WWD is relatively small. The hardness of the WWD is higher than that of the LD. At the same position, the tensile strength, yield strength and elongation of the WWD are significantly higher than those of the deposited sample with the LD, and the tensile strength of the upper part of the two samples is better than that of the lower part.