Powder forging of hollow articles

Powder metallurgy processes – Powder metallurgy processes with heating or sintering – Making composite or hollow article

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419 26, 419 49, 419 53, 419 54, B22F 700

Patent

active

051300842

ABSTRACT:
A method and apparatus are disclosed for fabrication of hollow articles by hot consolidation of metal alloy powder between a hollow core and a fluid pressure resistant outer shell. The hollow core is formed, a disposable layer is applied to define the object contour, a fluid pressure resistant metallic layer is formed over the disposable layer, which is then melted, removed and replaced by the metal alloy powder, and this assembly is hot isostatically pressed. The powder and core materials are preferably selected to be metallurgically compatible, so the core becomes an integral part of the finished article. The hollow article is inflated in a form die to establish the finished article contour.

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