| 摘要 |
A method is taught for the joining of a plurality of heat exchange tubes having a predetermined shape, such as a "Mae West" form, so as to obtain a tube bundle comprising a rocket engine thrust chamber. These tubes are joined to each other by laser powder injection welding, so as to close any gaps between adjacent tubes, and to securely bond the tubes together. A structural jacket is then affixed to the tube bundle, either in situ, by continuing to laser powder injection coat the surface, using an appropriate jacket composition, flame spraying or plasma spraying a suitable alloy in place, or by brazing or welding a previously formed jacket in place. In an extension of the invention, laser powder injection is performed to provide a repair method for the tube bundle, should the bundle be damaged or exhibit imperfect joining. |
