| 摘要 |
PURPOSE:To obtain coupling of a ceramic shaft and a metallic shaft excellent in thermal resistance and strength by inserting the ceramics shaft provided with convex and concave parts into a hole at the end of the metallic shaft and pressing the end face of the alloy shaft. CONSTITUTION:The alloy shaft part 3 having nearly equal coefficient of thermal expansion with the ceramics is joined to the end of metallic shaft 4 made of carbon steel etc. by friction pressure welding and a fitting hole 5 is provided. A concave and convex parts such as a groove 6 etc. are formed at the end of the ceramic shaft, and the shaft 2 is fitted in the fitting hole 5. The end face 13 of the alloy shaft part 3 is pressed by a die around the ceramic shaft 2 to give plastic deformation to form a concavity 7. As the wall part of deformed alloy shaft part 3 bites into the groove 6 of the shaft 2 in the fitting part by this process, the ceramic shaft 2 and metallic shaft 4 are coupled firmly through the alloy shaft part 3, and coupling excellent in heat resistance and mechanical strength can be obtained. |
