Abstract
The effect of compact density and aging condition on the tensile property was investigated for sintered precipitation hardening stainless steel (PH stainless steel) which was characterized by high tensile strength and high corrosion resistance. Two types powders of 17-7PH and 17-10P stainless steel were prepared by water atomizing process. The compact density does not increase greatly during sintering process because the powders are austenitic at sintering temperature. Addition of lwt%CrB to the stainless powder produces liquid phase at the sintering temperature, leading to an increase in compact density from 6.5 Mg/m3 (no addition of CrB) to 7.3 Mg/m3 . A sintered compact treated under optimum condition has high tensile strength above 900MPa for 17-7PH and 500MPa for 17-10P stainless steel.
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