B - Operations – Transporting – 23 – K
Patent
B - Operations, Transporting
23
K
327/108, 327/76
B23K 31/02 (2006.01)
Patent
CA 1210081
ABSTRACT OF THE DISCLOSURE A method is disclosed for joining metal parts by diffusion welding, which comprises initially the establish- ing of a joint between opposed bounding surfaces of the respective metal parts, the joint having generally increas- ing height from the periphery towards the middle thereof. The joint is provided with a connection to an external source for flushing gas and to a vacuum source. During preliminary heating and pressing together of the metal parts, the joint is supplied with an inert or reducing flushing gas, e.g. hydrogen, until the joint is closed by diffusion welding along its periphery. Thereafter, the joint may be evacuated, whereupon further heating, quick compression and a certain holding time provide com- plete diffusion welding of the metal parts. It is also suggested to reduce the cross section of the metal parts in the joint area and press these out to their original cross section during the diffusion welding.
437861
G. Ronald Bell & Associates
Moe Per H.
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