ピンフィン付き平板状純アルミニウム鋳物の凝固特性に対する鋳型外冷し金の効果

抄録

  The effects of out-of-mold chills on solidification characteristics in a plate-shaped pure aluminum casting with pin-fins were numerically examined by heat transfer and solidification simulation, and concepts for the casting designs of the baseplate integrated with fins made by directional solidification method using chills and high temperature molds were also investigated. The numerical results showed that both greater end effects and shorter solidification time can be obtained by the synergistic effect of high temperature molds and out-of-mold chills. Meanwhile, it was found that the solidification time tends to have a linear relationship with casting volumes, and that liquid isolation in the pin-fins occurs under longer solidification times. Here, it is thought that the conditions generating the liquid isolation in the pin-fins may be unsuitable for manufacturing by casting. In addition, it was suggested that the plot of the heat-exchanging performance versus solidification time may be useful for the casting design of the baseplate integrated with fins. Furthermore, it was shown that the liquid isolation can be prevented by placing an out-of-mold chill on the pin-fin-side surface.