Abstract
A comparative study was made on press/sintering behavior of water-atomized 17-4PH stainless steel alloyed and partially mixed powders and properties of the sintered materials.
The results were summarized as follows:
(1) Mixedα/γ-phase powder has higher compressibility than alloyed one by-8% in the state of rapid-quench atomization, as expected from Schaeffler constitution diagram.
(2) Mixed powder compact is characterized by better green strength (Rattler value) and also by less dimentional change during sintering operation for practical use.
(3) Powder compacts sintered at higher temperature have much the same tensile strength (1000MPa-graded) and corrosion resistance in the both cases of alloyed and mixed powders.
