电弧增材制造单道单层工艺特性研究

The cold metal transfer (CMT) technology was used to study the single-bead and single-layer process characteristics of marine high-strength steel wire and arc additive manufacturing (WAAM). By testing three process parameters of the protection gas different ratios, wire feeding speed (v_s) and welding speed (v_w) under the single welding bead characteristics, combined with the measurement of welding bead width, height, wetting angle and bead cross-section area under different process conditions, mastered the law of influence above three key process parameters. By the method of mathematical analysis, and full-period cosine function model which could accurately predict the single bead cross-section contour under the protection of 80% Ar+20% CO₂ mixed gas was established, which is basically consistent with the actual measurement results. It provided the basis for forming control of multi-layer WAAM.