激光定向能量沉积17-4PH不锈钢钝化与点蚀行为研究

谷清宇, 宋雁飞, 张亮亮, 王楠, 雷晓维

Passivation and Pitting Corrosion Behavior of Laser Directed Energy Deposited 17-4PH Stainless Steel

GU Qingyu, SONG Yanfei, ZHANG Liangliang, WANG Nan, LEI Xiaowei

表1 同轴送粉DED 17-4PH不锈钢样品的制备参数

Table 1 Preparation parameters of coaxial powder feeding DED 17-4PH stainless steel samples

Sample Laser power / W Scanning speed / mm·min-1 Layer thickness / mm Powder feeding rate / g·min-1 Heat input / J·cm-1 1# 1200 450 0.9 10.6 1600 2# 1200 500 0.9 10.6 1440 3# 1200 550 0.9 10.6 1309