| 摘要 |
PURPOSE: To decrease a sintering temperature of a grinding wheel without deteriorating its natural performance by integrally sintering and binding metal powder for forming a base metal mainly comprising Al with mechanical alloy powder comprising a binding phase of an abrasive grain layer mainly comprising Cu to which Sn, etc., are added. CONSTITUTION: A super-abrasive grain grinding wheel is formed of super- abrasive grain such as diamond to be used for grinding work to various materials such as glass and cemented carbide, or dressing of grinding wheels. The super-abrasive grain grinding wheel is sorted as a metal bond grinding wheel because of its binding material. In a grinding wheel having an abrasive grain layer on outer surfaces of a base metal, metal powder for forming the base metal mainly comprising Al is integrally sintered and bound with mechanical alloy(MA) powder comprising a binding phase of an abrasive grain layer mainly comprising Cu to which Sn or Sn and one sort or more of Fe, Co, Ni, Zn, Ag, and W are added. For example, an apparent grain size A of the MA powder is set to be 20-70μm, a thickness T of stripes of Cu 1 is set to be 1-3μm, and Sn 2 is thinly enclosed between Cu 1.
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