| 摘要 |
PURPOSE:To reduce stress so as to be capable of corresponding to high peripheral speed by fitting the conical tip part of a solid conical body, provided in a radial part, in a taper inner hole of a rim, provided in an extruder part and joining the above-mentioned fitting part in one body by means of diffusion joining. CONSTITUTION:A radial part 11 and an extruder part 12 of a compound radial turbine rotor 10 are formed by materials of different quality respectively. The exducer part 12 is made through precision casting, and a rim 14, which has a taper inner hole 13 with the big diameter on the radial part side, and a blade 15 projected from the outer periphery of the rim 14 are provided in one body. Further, the radial part 11 formed by powder super alloy is provided with a solid conical hub 18 which is united in one body with a blade 19 projected from the outer periphery of the big diameter part of the hub 18. Then, after being fitted in the taper inner hole 13 of the extruder part 12, the tip part on the small diameter part of the hub 18 is joined in one body with said taper joining part by means of diffusion joining. |
