异质辅助填丝熔化极电弧增材制造熔敷金属成分与性能调节

To achieve efficient and stable additive manufacturing of dissimilar material parts, the dissimilar auxiliary wire feed gas metal arc-based additive manufacturing method was proposed. The H08Mn2Si mild steel wire and the H06MnNi3CrMoA high-tensile steel wire were fed into the molten pool simultaneously. The tests were carried out to adjust the components, microstructures, and properties of the deposited metals. The results show that the quantity of granular bainite and acicular ferrite in the deposited metals increases with the mass fraction of high-tensile steels, which improves the tensile strength and microhardness of the deposited metals. The ranges of tensile strength and microhardness are as 558~885 MPa and 197HV~390HV, respectively. Finally, the induction teeth structure of low carbon steel/high strength steel was fabricated by the proposed method. The hardness gradient was realized between the two materials through the component gradient transition, which mitigates the interface mismatch problems.