Wear behavior of laser metal deposited 17‐4 PH SS‐W composite at varied tungsten powder flow rate

Abstract

AbstractThis research studies the wear behavior of laser metal deposition of 17‐4 PH SS‐W composite using a 6 mm alumina‐stainless steel ball under a load of 10 N, for 16 minutes, 40 seconds and with acquisition rate of 100 Hz conducted at 25 °C. The effect of laser power of between 2600 W and 1500 W; and powder flow rate of between 0.5 min−1 and 2.0 min−1 on wear resistance is investigated. Other processing parameters are constant throughout the experiments. The results show that the 17‐4 PH SS‐W composite produced at a high laser power of 2600 W exhibits a higher wear resistance as compared to the 17‐4 PH SS‐W composite samples produced at low laser power of 1500 W. The 17‐4 PH SS‐W composite sample produced at high laser power of 2600 W with tungsten powder flow rate of 2.0 min−1 has the highest wear resistance with wear volume of 0.0276 mm3 and wear rate of 8.8 ⋅ 10−5 mm3/N m while the 17‐4 PH SS‐W composite sample produced at a low laser power of 1500 W with tungsten powder flow rate of 1.0 min−1 has the wear volume of 0.02834 mm3 and wear rate of 9.0 ⋅ 10−5 mm3/N m.