各種型材を用いた減圧造型鋳型の冷却能

抄録

  Apparent thermal properties of the Vacuum Process Mold were measured for various mold materials by the pouring method. The chilling power (apparent thermal diffusivity) increased in order of silica sand, silicon carbide grit, zircon sand, mixture of steel shot and silica sand, and steel shot. But there was little difference between silicon carbide grit and zircon sand. Commercial pure aluminum was cast in these molds and the solidification times were measured. The solidification times calculated by Adams equation using the obtained apparent thermal properties coincided well with the measured values. The macrostructures and the mechanical properties of the commercial pure aluminum cylindrical castings were not affected very much by the chilling power of the molds examined.