Plasma debinding and sintering of metal injection moulded 17-4PH stainless steel

Abstract

In this work, 17-4PH stainless steel parts processed in a Plasma Assisted Debinding and Sintering (PADS) furnace were characterised in terms of microstructure, final density, microhardness, carbon content and tensile behaviour. To determine whether these properties were satisfactory, the same characterisation procedure was conducted on the parts processed by conventional batch furnaces that are normally employed in Metal Injection Moulding industrial plants. The properties were in good agreement, and only slight differences like an extremely low carbon content (0.003% w/o) were observed. It has been seen that not only economical advances but also intricate materials with suitable responses may be obtained using PADS.

Adjusting the Sintering Cycle of a Hadfield Sintered Steel Produced by Metal Injection Molding

“…The same sublimation issue can occur also for other elements, e.g. copper, as showed by Schroeder et al 7 during an investigation of plasma sintering for 17-4 PH stainless steel.…”

Microstructures, mechanical properties, and fracture behaviors of metal-injection molded 17-4PH stainless steel

“…The theoretical density of 17-PH stainless steel reported in the literature ranges from 7.75 to 7.85 g/cm 3 [14,[24][25][26]. In this study, the theoretical density of 17-PH was regarded as 7.80 g/cm 3 .…”

Comparative study on the properties of 17-4 PH stainless steel parts made by metal fused filament fabrication process and atomic diffusion additive manufacturing

“…Wu et al (2002a) and studied the effect of sintering parameters on the concentration of d-ferrite (from 1,260 to 1,380°C) in a 17-4 PH MIM for two different atmospheres, H 2 and H 2 1N 2 . Schroeder et al (2011) instead, used a sintering process on a conventional vacuum furnace at 1,330°C also in a MIM 17-4 PH. Suri et al (2006) analysed the influence of d-ferrite on the mechanical properties through hardness tests and impact tests at different condition of MIM 17-4 PH and evaluated porosity and microstructures.…”