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US 2013/0220488 A1Published application
Method for carburizing steel components
AssigneeROLLS-ROYCE plc
InventorsStephen N. Hammond, Udayan Trivedi, Thomas L. Doubts, Douglas C. Steckbauer
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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.
Claims1
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.
1 more element
Dependencies are inferred from the claim text.