| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method of a contact material capable of manufacturing the contact material, having cutting performance, breaking performance, and power transmission characteristics by reducing the loss of a raw material. SOLUTION: The manufacturing method of a contact material includes: a process (S1) for obtaining mixed powder by mixing a conductive constituent made of silver having 30-50 wt.%, an arc-proof constituent made of tungsten carbide having 48.5-68.5 wt.%; and an auxiliary constituent made of at least one of cobalt, iron, and nickel having 0.2-5 wt.%; a process (S2) for obtaining a forming body by forming the mixed powder so that a void ratio becomes 25-35%; a process (S3) for obtaining a heat treatment body by heat-treating the forming body at 1,150-1,250°C in a reducing atmosphere; and a process (S4) for obtaining a pressurized body by pressurizing the heat treatment body so that the void ratio becomes not more than 10%. COPYRIGHT: (C)2008,JPO&INPIT
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