Powder forging of hollow articles
December 24, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3628226 3927817 Method of plastic flow diffusion bonding Controlled-pressure diffusion bonding and fixture therefor Method of fabricating a hollow article Method of making gas turbine engine blades Method of producing rocket combustors Manufacturing method for hollow metal airfoil type structure Method of manufacturing a weapon barrel Methods of forming powdered metal articles InventorsApplicationNo. 633728 filed on 12/24/1990US Classes:419/8, Powder next to solid419/28, Subsequent working419/49, Hot isostatic pressing (HIP)419/53, Plural heating steps including sintering419/54Different temperaturesExaminersPrimary: Lechert, Stephen J. Jr.Foreign Patent References
International ClassB22F 007/00AbstractA 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. | |
