Abstract
The conventional die (C/C) and warm die compaction (W/C) were applied to prepare the green powder compacts of SUS304 and SUS316 stainless steels. These green compacts were sintered at 1393 K, 1473 K and 1523 K in three kinds of atmospheres, i.e. N2 gas, Ar gas and vacuum, and some of the sintered compacts thus obtained were subjected to shot peening treatment. Both mass losses of the SUS304 and SUS316 sintered specimens prepared by W/C process decreased almost linearly with an increase in sintered density ratio. The data points, however, fell on two different straight lines, and it was recognized that the corrosion resistance of SUS316 sintered specimen was better than that of SUS304 sintered specimen. The reactivation ratios of the SUS304 sintered specimens prepared by C/C process were about 30% and about 58% respectively for without shot peening and with shot peening treatment, which indicates that the corrosion resistance could not be improved by the shot peeing treatment. And it was also confirmed that this reactivation ratio could not be improved by shot peening process on both the SUS304 and SUS316 sintered specimens prepared through the W/C process.
