Metal treatment – Compositions – Heat treating
Patent
1986-02-12
1988-06-14
Dean, Richard O.
Metal treatment
Compositions
Heat treating
148 115Q, 148127, C22F 110
Patent
active
047509465
ABSTRACT:
Components (5) in a superalloy, in particular a dispersion hardened nickel based alloy, are connected together by pressure bonding in the solid condition with the greatest possible limitation of the overall deformation of the complete components (5) by lateral restraint (7), the actual bonding zone (6) having short-term intensive dynamic plastic flow imposed on it and, taking account of the deformation temperature, the local deformation rate .epsilon..sub.l and the local deformation .epsilon..sub.l referred to the bonding zone (6) are matched together in such a way that the driving force during the subsequent heat treatment of the complete workpiece above the recrystallization temperature is sufficient to force the formation of coarse grain under all conditions. It can then be assumed that, in general, the expression ##EQU1## h.sub.o =height of the bonding zone (6) before connection, h.sub.f =height of the bonding zone (6) after connection,
REFERENCES:
patent: 4490186 (1984-12-01), Sines et al.
Gessinger Gernot
Jahnke Bernd
Rydstad Hans
Singer Robert
BBC Brown Boveri & Company Limited
Dean Richard O.
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