Process for improving the corrosion resistance of stainless stee

Details Process for improving the corrosion resistance of stainless stee Process for improving the corrosion resistance of stainless stee

1995-11-30

1996-12-31

Mai, Ngoclan

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Making composite or hollow article

419 38, B22F 100, B22F 700

Patent

active

055903843

ABSTRACT:
The present invention related to a process for improving the corrosion resistance and processability of stainless steel powder composition. The process comprises prealloying the stainless steel powder with about 1% to about 3% by weight of tin and blending the prealloyed stainless steel powder before molding with from about 0.5% to about 1.5% of an additive in particulate form consisting essentially of by weight 2 to 30% of tin and the balance consisting essentially of at least one element selected from copper and nickel.

REFERENCES:
patent: 3425813 (1969-02-01), Orlemann
patent: 3520680 (1970-07-01), Orlemann
patent: 4240831 (1980-12-01), Ro et al.
patent: 4314849 (1982-02-01), Ro et al.
patent: 4420336 (1983-12-01), Klar et al.
patent: 4662939 (1987-05-01), Reinshagen
Chatterjee, S. K. et al; The Effect of Tin, Copper, Nickel and Molybdenum on the Mechanical properties and Corrosion Resistance of Sintered Stainless Steel (AISI 304L). Mod. Dev. Powder Metall. (1985) vol. Date 1984, 16, 277-93.

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