Corrosion-resistant turbine blades and method for producing them

Details Corrosion-resistant turbine blades and method for producing them Corrosion-resistant turbine blades and method for producing them

1975-03-26

1977-07-19

Rutledge, L. Dewayne

Stock material or miscellaneous articles

All metal or with adjacent metals

Composite; i.e., plural, adjacent, spatially distinct metal...

228173, 428686, B32B 1500

Patent

active

040366014

ABSTRACT:
A turbine blade includes a core made of a highly heat-resistant alloy and a highly heat-resistant, nonporous, corrosion-resistant, metallic protective cover fitted onto the core. The cover forms a gas-tight metallurgical bond with the core and has great strength, high ductility and a uniform layer thickness. The process includes the steps of preshaping a core of highly heat-resistant material and fitting the preshaped core into a substantially preshaped, corrosion-resistant and highly heat-resistant cover. The cover is welded to the core at a point which during later use is subjected only to little stress to form a vacuum-tight seal and workpiece. The workpiece is heated in a pressure vessel to a temperature of at least 1000.degree. C, and the cover of the heated workpiece is heat-welded to the core by isotactic hot-pressing without the formation of pores.

REFERENCES:
patent: 2719797 (1955-10-01), Rosenblatt et al.
patent: 3157482 (1964-11-01), Nero et al.
patent: 3268305 (1966-08-01), Hagadorn et al.
patent: 3271849 (1966-09-01), Price
patent: 3547600 (1970-12-01), Gwynn et al.
patent: 3578743 (1971-05-01), Bradley et al.
patent: 3657784 (1972-04-01), Selman et al.

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