| 摘要 |
PURPOSE:To reduce residual strain produced in the vicinity of a brazing joint part by joining by brazing a buffer plate made of low Young's modulus metal with a ceramic-made blade wheel, and welding a bearing support shaft to the buffer plate. CONSTITUTION:A buffer plate 2 made of low Young's modulus metal such as copper is brazed with use of silver solder to a solid ceramic-made blade wheel 1, and thereafter brought into contact with a bearing support shaft 3 previously subjected to thermal refining and surface hardening and welded by means of electron beams. Since the buffer plate 2 is interposed in such a manner, residual strain in the vicinity of the brazed joint part can be reduced. |
