Metal treatment – Process of modifying or maintaining internal physical... – Producing or treating layered – bonded – welded – or...
Patent
1997-03-07
1999-06-29
Phipps, Margery
Metal treatment
Process of modifying or maintaining internal physical...
Producing or treating layered, bonded, welded, or...
148528, 148562, 148555, 2988921, 2988922, 2988971, 29889721, 1641222, B23P 1504
Patent
active
059163844
ABSTRACT:
A process for preparing a Ni-based superalloy cast article includes (a) preparing an alloy charge composed of from 1.4 to 4.4 wt. % of Cr, from 3 to 8 wt. % of Co, from 5 to 7.5 wt. % of W, from 4.8 to 7.5 wt. % of Re, from 6 to 9 wt. % of Ta, from 4.8 to 6 wt. % of Al, from 0.1 to 0.5 wt. % of Nb, from 0.8 to 1.8 wt. % of Hf, from 0.05 to 0.1 wt. % of C, from 0.01 to 0.05 wt. % of Y, from 0.005 to 0.15 wt. % of B, and balance Ni, wherein the sum of W+Re is about 12 wt. %, the sum of Al+Ta+Hf+Nb ranges from 13.6 to 15.6 wt. %, and the sum of W+Re+Ta+Hf+Nb ranges from 20.2 to 22.8 wt. %; (b) melting the alloy charge in a furnace to provide an alloy melt; (c) pouring the alloy melt into a mold having a plurality of cavities which define at least one pair of longitudinal halves of the article to be cast; (d) withdrawing the mold containing the alloy melt from the furnace so as to induce solidification of the alloy melt to provide at least one pair of cast longitudinal halves of an article; (e) removing the mold and cleaning the at least one pair of cast longitudinal halves; (f) providing a brazing filler between the cast longitudinal halves of each pair of the at least one pair of cast longitudinal halves along their matching plane of slice to provide an assembly; (g) subjecting each assembly to solution heat treatment and brazing to provide an article; (h) quenching the article; and (i) subjecting the article to a multi-step ageing treatment.
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patent: 4507051 (1985-03-01), Lesgourgues et al.
patent: 5077141 (1991-12-01), Naik et al.
patent: 5226982 (1993-07-01), Eylon
patent: 5366695 (1994-11-01), Erikson
Phipps Margery
Spencer George S.
The Controller, Research & Development Organization
Wells Ashley J.
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