초록 ▼

A component, such as a turbine disk, made from a metal or metal alloy which has been processed to display superplastic properties at elevated temperatures, is diffusion bonded to a component or components, such as turbine blades, made from another metal or metal alloy, by disposing the components in

A component, such as a turbine disk, made from a metal or metal alloy which has been processed to display superplastic properties at elevated temperatures, is diffusion bonded to a component or components, such as turbine blades, made from another metal or metal alloy, by disposing the components in a press with the surfaces to be bonded in mating contact. Moisture and oxygen are removed from between the surfaces. Heat and pressure are then applied, such as by forging at an elevated temperature or by hot isostatic pressing, to cause superplastic deformation of at least one of the components at the bonding surfaces. The heat and pressure are held sufficiently long to diffusion bond the surfaces. The new integral assembly is then heat treated to obtain desired properties. Consistently good diffusion bonds are achieved by this method.

대표청구항 ▼

A method for joining a first element made from a first superalloy material to a second element made from a metal which is a different material from said first material, including the steps of: processing said first material such that it exhibits the property of becoming superplastic during the subse

A method for joining a first element made from a first superalloy material to a second element made from a metal which is a different material from said first material, including the steps of: processing said first material such that it exhibits the property of becoming superplastic during the subsequent step of heating and applying pressure, and fabricating said first element from said processed first material, said first element having a bonding surface, said second element also having a bonding surface adapted to mate with the bonding surface of the first element; positioning said first and second elements within a press such that their bonding surfaces are in mating contact; and heating said first and second elements within said press and simultaneously applying pressure thereto to obtain (1) superplastic deformation of said first element at its bonding surface where it mates with the bonding surface of said second element to create line-on-line contact over said surface and (2) a solid state diffusion bond at said mating surfaces to form an integral assembly.