| 摘要 |
PURPOSE: To reduce weight, obtain vibration damping performance and rust preventive performance, and enhance productivity by forming base metal of a sintered body of metallic powder which is mainly composed of Al and has specific composition, and molding and sintering an abrasive grain layer composed of metallic powder having specific composition and the base metal at one time. CONSTITUTION: In a super abrasive grain grinding wheel to be used in grinding work or the like of a nonferrous material such as ceramics and an iron and steel material such as carbon steel, a binding phase of an abrasive grain layer 1 is formed of metallic powder by adding Cu 33 to 75wt.%, Sn 18 to 55wt.%, graphite 0 to 25wt.% or one or more kinds of Fe, Co, Ni, Zn, Ag, Ti, Mn, Cr and W in addition to these. Base metal 2 is mainly composed of Al, and is formed of metallic powder by adding Si 20 to 50wt.% or one or more kinds of Cu, Mg, Fe, Mn, Ni and Zn in addition to this. A grinding wheel is manufactured by integrally sintering and joining the abrasive grain layer 1 and the base metal 2. The base metal 2 is formed so that a thermal expansion coefficient of a sintered body becomes 10 to 18×10<-6> / deg.C.
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