HIP manufacture of a hollow component
AssigneeROLLS-ROYCE plc
InventorsGeorge Thorne, Robert Charles Tonks, Wayne Eric Voice
Life of this patent
Estimating the term…
Abstract
Forming a hollow structure having an internal coating includes the steps of placing a core shaped to form the internal surface of the structure in a mould, filling the mould with a material powder, hot isostatically pressing the powder about the mould to consolidate the powder, and removing the core from the hollow structure formed, wherein a coating is applied to the core prior to placement in the mould, which coating bonds to the hollow structure formed, during the hot isostatic pressing, to form the internal coating.
Claims5
A method of forming a hollow structure having an internal coating comprising the steps of:
- placing a core shaped to form the internal surface of the structure in a mould,
- filling the mould with a material powder,
- hot isostatically pressing the powder about the mould to consolidate the powder, and
- removing the core from the hollow structure formed,
- wherein a coating is applied to the core prior to placement in the mould, which coating bonds to the hollow structure formed, during the hot isostatic pressing, to form the internal coating,
- wherein the coating applied to the core comprises a first coating applied to the core and a second coating applied over the first coating, and
- wherein the first coating is a ceramic coating and the second coating is a bond coating, such that the coating as a whole preferentially bonds to the powder consolidated about the core during the hot isostatic pressing process.
A method of forming a hollow structure having an internal coating comprising the steps of placing a core shaped to form the internal surface of the structure in a mould, filling the mould with a material powder, hot isostatically pressing the powder about the mould to consolidate the powder, and removing the core from the hollow structure formed, wherein a coating is applied to the core prior to placement in the mould, which coating bonds to the hollow structure formed, during the hot isostatic pressing, to form the internal coating, and wherein the core is made of mild steel and its removal is effected by use of a chemical agent.
Dependencies are inferred from the claim text.