B - Operations – Transporting – 23 – B
Patent
B - Operations, Transporting
23
B
78/42
B23B 47/00 (2006.01) B23K 20/14 (2006.01)
Patent
CA 1237002
A b s t r a c t A method for joining thin-walled tubular parts (1, 2) of metal by forge/diffusion welding comprising establishing a joint (3) between opposed bounding surfaces (4, 5), the joint having increasing height from one side (7) to the other. During heating of the parts the joint (3) is supplied with an inert or reducing flushing gas, for instance hydrogen, until the oxides are removed from the joint surfaces (4, 5). By subsecuently pressing the parts together, complete forge/diffusion welding is obtained. It is also suggested to reduce the cross-section of the parts eccentrically in the joint area and press the parts out to their initial cross-section during the forge/ diffusion welding. A packer (8) is used to close the joint (3) on the side where the distance between the parts (1, 2) is the greatest. Means (10, 11) are shown for performing the welding under water. (Fig. 1).
465293
G. Ronald Bell & Associates
Moe Per H.
LandOfFree
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