Metal fusion bonding – Process – Chemical reaction produces filler material in situ
Patent
1979-04-06
1982-05-25
Crane, Daniel C.
Metal fusion bonding
Process
Chemical reaction produces filler material in situ
228208, 228243, 228194, B23K 2000, B23K 2022
Patent
active
043312861
ABSTRACT:
A method for pressure bonding metal members by utilizing eutectic reaction comprising the steps of bringing two metal members of dissimilar metals to be bonded into contact with each other under a predetermined contacting pressure P.sub.1 lower than the plastic deformation pressures of the metals of the two members and heating the contacting surfaces of the two members to a temperature lower than melting point temperatures of the metals and not lower than the eutectic temperature thereof to produce a liquid of eutectic composition by eutectic reaction between the surfaces of the two members to be bonded, applying an upset pressure P.sub.2 higher than the contacting pressure P.sub.1 to the surfaces to be bonded to squeeze out the liquid from the contacting surfaces of the two members to outside, and cooling the bonded surfaces of the two members. When the members to be joined by pressure bonding are of the same metal, an insert comprising an element undergoing eutectic reaction with the metal of the two members is interposed between the surfaces of the two members to be bonded.
REFERENCES:
patent: 3180022 (1965-04-01), Briggs
patent: 3436806 (1969-04-01), Supan
patent: 4046305 (1977-09-01), Brown
Lynch et al., "Brazing by the Diffusion-Controlled Formation of a Liquid Intermediate Phase" from Welding Research Supplement, Feb. 1959, pp. 85-89.
Iizuka Tomio
Miyazaki Kunio
Ochiai Izumi
Suzuki Hitoshi
Tamamura Takeo
Crane Daniel C.
Hitachi , Ltd.
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