Joseph M Anello

US Patent:

44950020, Jan 22, 1985

Filed:

Apr 22, 1983

Appl. No.:

6/487485

Inventors:

Joseph G. Anello - Ridley Park PA

Assignee:

Westinghouse Electric Corp. - Pittsburgh PA

International Classification:

C21D 706

US Classification:

148 12E

Abstract:

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