In this paper, ER50-6 steel was fabricated by wire arc additive manufacturing (WAAM) with an A-W GTAW system. The microstructure, mechanical properties, and corrosion behaviors of ER50-6 steel by WAAM were studied. The results showed that, with the GMAW current increased, from the bottom to the top of the sample, the microstructure was fine ferrite and granular pearlite, ferrite equiaxed grains with fine grains at grain boundaries, and columnar ferrite, respectively. The average hardness in the vertical direction of samples 1# and 2# was 146 and 153 HV, respectively. The hardness of sample 2# increased because of the refinement of grain. The pores in the sample increased as the bypass current increased. The higher bypass current also has a deterioration effect on the corrosion behavior of ER50-6 steel.

中文翻译：

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电弧增材制造ER50-6钢的组织与性能

在本文中，ER50-6 钢是通过电弧增材制造 (WAAM) 和 AW GTAW 系统制造的。用WAAM研究了ER50-6钢的显微组织、力学性能和腐蚀行为。结果表明，随着GMAW电流的增大，试样自下而上依次为细小的铁素体和粒状珠光体、晶界细晶粒的铁素体等轴晶和柱状铁素体。试样1#和2#的垂直方向平均硬度分别为146和153HV。由于晶粒细化，试样2#的硬度增加。样品中的孔隙随着旁路电流的增加而增加。较高的旁路电流对ER50-6钢的腐蚀行为也有恶化作用。