Specialized metallurgical processes – compositions for use therei – Compositions – Consolidated metal powder compositions
Patent
1979-02-09
1980-12-23
Hunt, Brooks H.
Specialized metallurgical processes, compositions for use therei
Compositions
Consolidated metal powder compositions
75 05BA, 75 05C, 75200, 75211, 75224, B22F 300
Patent
active
042408318
ABSTRACT:
Disclosed is a process for improving the corrosion resistance of a stainless steel powder or compact thereof wherein said powder is produced by atomizing a melt of metals in an oxidizing environment whereby the resulting stainless steel powder is surface-enriched in silicon oxides. The process comprises adding an effective proportion of modifier metal to said melt prior to said atomization, said modifier metal selected from the group consisting of tin, aluminum, lead, zinc, magnesium, rare earth metals and like metals capable of enrichment about the surface of said resulting atomized stainless steel powder and effective under reductive sintering conditions in the depletion of said silicon oxides about said surface; and sintering said resulting atomized powder or a compact thereof under reducing conditions, said sintered powder or compact thereof being depleted in said silicon oxides and the corrosion resistance of said powder or compact thereof being improved thereby.
REFERENCES:
patent: 3243288 (1966-03-01), Feldmann et al.
patent: 4154608 (1979-05-01), Carey et al.
Klar Erhard
Ro David H.
Whitman Charles I.
Becker Gordon P.
Douthitt Merton H.
Hunt Brooks H.
SCM Corporation
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