Study compares properties of water and gas atomised 17-4PH stainless steel for MIM

摘要

17-4PH (precipitation hardening grade) stainless steels are one of the most popular materials used in MIM, offering superior mechanical properties and corrosion performance. This grade of stainless steel is also magnetic and hardenable to various strength levels by varying the aging heat treatment temperature. Ming-Wei Wu at the National Taiwan Institute of Technology and fellow researchers from the National Formosa University, Taiwan and National University Taiwan, have reported on the results of a study, published in Metals and Materials International (Vol. 21, No. 3, May 2015, pp 531 -537] to compare the as-sintered and heat treated properties of both water atomised and gas atomised 17-4PH stainless steel powders. The paper, "Microstructures, Mechanical Properties, and Fracture Behaviors of Metal Injection Molded 17-4PH Stainless Steel" focussed in particular on the influence of powder type on various heat treatments (sintering, solutioning, H900, and H1100] on microstructure and mechanical properties. The role of 8 ferrite on the fracture behaviour of MIM 17-4.PH stainless steels was also examined.