| 摘要 |
PURPOSE:To produce statically and safely a bearing material having a uniform and fine cast structure by spraying metallic powder or a mixture composed of the metallic powder and nonmetallic powder or the metallic powder and fibers onto a steel strip and melting the same by heating to unite the powder to one body on the steel strip then cooling the strip. CONSTITUTION:Bearing powder such as metallic powder 3 is sprayed on a steel strip 1 by a powder spreader 2 and is quickly heated and melted by a high frequency heating furnace 4. The strip 1 is then quenched 6 from the rear surface thereof by the oil which is circulated and is maintained at a uniform temp. The alloy surface is heated by, for example, a ''Siliconit'' heater 5 to grow perpendicularly a dendrite structure from the strip 1. The strip is subjected to water quenching 7 and is cooled to an ordinary temp. then the surface is trimmed with a milling cutter, by which a bearing material is manufactured. The heating and cooling processes are accomplished in N2 or nonoxidative atmosphere.
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