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US 2015/0083284 A1Published application
Flow forming method
AssigneeROLLS-ROYCE plc
InventorsMartin John RAWSON, John Harold BOSWELL, Martin TUFFS, George William WHITEHURST, Paul Owen HILL
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Abstract
A method of forming a shaped article. The method comprises providing a pre-form 40 comprising a chromium molybdenum vanadium steel alloy, heat treating the pre-form to obtain a surface hardness of between 420 and 480 according to the Vickers hardness test, and, subsequent to the heat treating step, flow forming the pre-form 40 to shape the pre-form.
Claims15
A method of forming a shaped article, the method comprising:
- providing a pre-form comprising a steel alloy comprising chromium, molybdenum and vanadium;
- heat treating the pre-form to obtain a surface hardness of between 420 and 480 according to the Vickers hardness test;
- and
- subsequent to the heat treating step, flow forming the pre-form to form a shaped article.
1 more element
Dependencies are inferred from the claim text.