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A PROCESS FOR PREPARATION OF DUALLY MICROSTRUCTURED SHAPED NICKEL BASED SUPERALLOY COMPONENTS HAVING ONE STRUCTURE BYCASTING AND OTHER BY POWDER METALLURGY
A PROCESS FOR PREPARATION OF DUALLY MICROSTRUCTURED SHAPED NICKEL BASED SUPERALLOY COMPONENTS HAVING ONE STRUCTURE BYCASTING AND OTHER BY POWDER METALLURGY
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机译：粉末冶金法制备具有一种结构的镍基双微观结构的镍基超级合金成分的方法
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摘要
A process for preparation of dually microstructured shaped nickel based superalloy components having one structure by casting and other by powder metallurgy wherein the process comprises steps of- (a) encapsulating both the solid and powder materials in a leak-tight capsule; (b) degassing the said capsule to a vacuum of 10° to 10° torr for 12-24 hours at a temperature of 400- 800°C followed by crimp-sealing in dynamic vacuum; (c) hot isostatic pressing of degassed capsule at a temperature of 950-1250°C and a pressure of 100 MPa for 3 hours or more; (d) skinning the capsule by machining or pickling, obtaining the desired product.
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