The influence of arc energy and filler metal composition on the microstructure of additively welded thin-walled structures of duplex stainless steels was investigated using different commercially available standard and superduplex solid wire electrodes commonly used today. As welding process, the cold metal transfer (CMT) process was used. The arc energy and cooling rate were varied by adjusting the wire feed and welding speed. Optical emission spectroscopy (OES) and carrier gas melt extraction (CGME) were used to determine the chemical composition of the specimens. The ferrite content was determined both by magnetic induction and by image analysis as a function of the wall height. In addition, the microsections were examined for intermetallic phases and precipitations. Moreover, corrosion tests were carried out according to ASTM G 48, Method A. The results indicate that an increase in arc energy leads to longer t_12/8 cooling times. Depending on the filler metal composition, this leads to ferrite contents that are partially outside the values required according to ISO 17781. Furthermore, precipitates of secondary austenite are often found, which is attributed to the multiple reheating by the subsequent layers.

使用当今普遍使用的不同市售标准和超双工实心焊丝，研究了电弧能量和填充金属成分对双相不锈钢增材焊接薄壁结构的显微组织的影响。作为焊接工艺，使用了冷金属转移（CMT）工艺。电弧能量和冷却速率通过调整焊丝进给和焊接速度来改变。使用光发射光谱法（OES）和载气熔体萃取（CGME）来确定样品的化学成分。通过磁感应和图像分析确定铁素体含量与壁高的关系。此外，检查了显微切片的金属间相和沉淀。此外，腐蚀试验是根据ASTM G 48方法A进行的。_12/8冷却时间。根据填充金属的成分，这会导致铁素体含量部分超出ISO 17781要求的值。此外，经常会发现二次奥氏体沉淀，这是由于随后的层多次加热所致。