Some observations on the sintering of 316L austenitic steel in argon atmosphere
Keywords:Powder metallurgy, Stainless steel, Surface oxidation, Densification
PM high speed steels are prone to higher corrosion rates due to residual porosity as well as chromium depletion of the matrix during sintering AISI 316L powders have been cold compacted (100-1,000 MPa) and sintered (1,000-1,250°C, 15-240 min) under several argon containing or vacuum atmospheres. Better densification rates can be achieved as sintering time or temperature increase in the presence of argon. No surface oxidation has been observed with the use of low pressure argon atmospheres, as long as samples are protected in a stainless steel partially sealed container.
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