| 摘要 |
PCT No. PCT/NO83/00010 Sec. 371 Date Dec. 12, 1983 Sec. 102(e) Date Dec. 12, 1983 PCT Filed Apr. 13, 1983 PCT Pub. No. WO83/03565 PCT Pub. Date Oct. 27, 1983.A method for joining parts of metal by diffusion welding comprises initially the establishing of a joint between the opposed bounding surfaces, the joint having generally increasing height from the periphery towards the middle. The joint is provided with a connection to an external source for flushing gas and a vacuum source. During the preliminary heating and pressing together of the parts the joint is supplied with an inert for reducing flushing gas, e.g., hydrogen, until the joint by diffusion welding is closed along its periphery. Thereafter, a vacuum may be pumped in the joint, where upon further heating, quick compression and a certain holding time provide complete diffusion welding of the parts. It is also suggested to reduce the cross-section of the parts in the joint area and press these out to their original cross-section during the diffusion welding.
|
