| 摘要 |
PURPOSE:To make it possible to manufacture composite material bearings having a high joint strength between a ceramic material and a metal and having a high structural strength and a large wear-resistant ability, by shinkage-fitting a metal onto a coated ceramic surface which is coated with a soft metal by vacuum evaporation. CONSTITUTION:The outer surface of a ceramic pipe 1 is mechanically ground, finished by grinding with the use of a grinder having less than #100 surface roughness, and is degreased by acetone. A soft metal 2 is coated on the outer surface of a ceramic pipe 1 which has been rinsed, to a thickness of 10<4> to 10<5> A deg. by means of a vacuum evaporation device, and then the surface of the metal 2 is machined to have corrugation. Meanwhile, the inner surface of a carbon steel pipe 3, after being machined, is heated to a temperature of about 400 to 500deg. C for shrinkage fit, and the ceramic pipe 1 is shrinkage-fitted into the carbon steel pipe 3. Thus, it is possible to prevent the ceramic pipe 1 from cracking during shirinkage-fit while the bonding between the ceramic pipe 1 and the carbon steel pipe 3 is satisfactory, that is, no slip was appreciated between their joint surface during performance test of bearing, and the tolerance of interference of shrinkage-fit may be made to be larger than that of a ceramic pipe having no metal 3 coated by vacuum evaporation.
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