US2013220488A1PendingUtilityA1

Method for carburizing steel components

Assignee: ROLLS ROYCE CORPPriority: Dec 23, 2003Filed: Oct 23, 2012Published: Aug 29, 2013
Est. expiryDec 23, 2023(expired)· nominal 20-yr term from priority
C21D 1/06C23C 8/80C23C 8/02C23C 28/321
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Claims

Abstract

A carburizing process for increasing the hardness of a case region of a steel component. In one form the application includes plating the outer surface of a stainless steel component with nickel prior to carburizing. One component includes a stainless steel object having a hardened case substantially free of continuous phase grain boundary carbides.

Claims

exact text as granted — not AI-modified
1 . A method of increasing the hardness of a steel object, comprising:
 applying a nickel plating to at least a portion of a surface of the steel object;   subjecting the steel object to carburizing to allow carbon atoms to diffuse through the nickel plating and form a case portion at a depth greater than or equal to 0.012 inches; and   heat treating the steel object after said subjecting and the case portion having a hardness of at least Rc 50.

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