Autofrettage of thermally clad components
AssigneeWeir Group IP Limited
InventorsJames Wood, Gladys Schnier
Life of this patent
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Abstract
A method of generating compressive residual stresses through a thickness of a metal component comprising the steps: receiving a metal base component (10), which in use is subjected to applied pressure and applying by thermal deposition cladding (16) to one or more surfaces (14) of the base component. The cladding (16) comprises one or more layers of metal or metal alloy. The method also includes, subsequent to the cladding step, applying autofrettage to the clad component thereby generating compressive residual stresses through the one or more layers of metal or metal alloy (16) and at least part way through the base component.
Claims13
A method of generating compressive residual stresses through a thickness of a metal component, the method comprising the steps:
- receiving a metal base component, which in use is subjected to cyclic applied pressure;
- applying by thermal deposition cladding to one or more surfaces of the base component, wherein the cladding comprises one or more layers of metal or metal alloy;
- and
- applying autofrettage to the clad component thereby generating compressive residual stresses through the one or more layers of metal or metal alloy and at least part way through the base component.
A pressure vessel comprising a metal base component, which in use is subjected to applied pressure, wherein one or more surfaces of the base component include one or more layers of metal or metal alloy applied by thermal deposition thereby providing cladding of the surface and wherein the clad component is or has been subject to an autofrettage process such that compressive residual stresses are generated through the one or more layers of metal or metal alloy and at least part way through the base component including the interface between the one or more surfaces and the cladding.
Dependencies are inferred from the claim text.