Abstract
This paper studies the change in properties of powder metallurgical 316L stainless steel when pure vanadium, molybdenum and tungsten (3% vol.) are added. The objective is to study the possibility of nitrogen pick-up by these refractory elements better than the chromium from plain steel. All materials have been manufactured mixing the powders with a 0.6% (wt.) of wax. Compaction was carried out at 700 MPa, and green density was evaluated. Finally, sintering was done (for 30 min) in 25%N 2 -75%H 2 at 1230 °C. Evaluated properties include sintering density, hardness, and corrosion (through salt spray test), and a broad microstructural study (optical and scanning electron microscopy) was also carried out.
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