Three-step treatment of stainless steels having metastable...

Details Three-step treatment of stainless steels having metastable... Three-step treatment of stainless steels having metastable...

C - Chemistry, Metallurgy

21

D

148/31

C21D 8/00 (2006.01)

Patent

CA 1196257

ABSTRACT OF THE DISCLOSURE This is a process for producing improved chlor- ide corrosion resistance in turbine components fabricated from stainless steels which contains generally at least 1% if both a martensitic and metastable austenitic phase and comprises an initial high-intensity shot peening, followed by an aging cycle at about 980-1020°F for ?-4 hours and a final (lower intensity) shot peening. A relatively homogeneous surface of aged marten- site is produced and selective attack which forms sharp pit-like defects which initiate cracks is avoided.

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