This study investigated the influence direct energy deposition (DED) process parameters have on the metallurgical characteristics (porosity, microstructural evolution, microhardness, and corrosion behavior) of 17−4 PH stainless steel powder. During the deposition, laser power and scanning speed were varied from 300 W to 400 W and from 7.62 mm/s to 12.7 mm/s, respectively while powder feed rate and the hatch overlap were kept constant at 4.7 g/min and 75%, respectively. Coupons were prepared for metallographic characterization in the as-built and heat treated condition. It was established that laser power scanning speed, and heat treatment had a meaningful impact on metallurgical characteristics studied.

这项研究调查了直接能量沉积（DED）工艺参数对17-4 PH不锈钢粉末的冶金特性（孔隙率，显微组织演变，显微硬度和腐蚀行为）的影响。在沉积过程中，激光功率和扫描速度分别从300 W至400 W和7.62 mm / s至12.7 mm / s变化，而粉末进料速度和舱口重叠保持恒定在4.7 g / min和75％，分别。制备了试样，用于在建成和热处理条件下进行金相表征。已经确定，激光功率扫描速度和热处理对所研究的冶金特性具有有意义的影响。