On the Difference of Various Molds on the Mechanical Properties and the Microstructures of Cast Steel and Spheroidal Graphite Cast Iron

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  • 普通鋳鋼と球状黒鉛鋳鉄の材質に及ぼす鋳型種類の影響
  • フツウ チュウコウ ト キュウジョウ コクエン チュウテツ ノ ザイシツ ニ

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Abstract

  As for the descent of temperature of castings after pouring, it became more rapid in the order of V-process-full mold process, V-process, Full mold process, Furan resin mold process and CO2 process. This difference was attributed to the heat transfer rate. In regard to the mechanical properties of cast steel, elongation and reduction of area increase as cooling rate of castings decrease, but proof stress and tensile strength increase as cooling rate of castings increase. The mechanical properties of spheroidal graphite cast iron improved as solidification time became longer. The effects of Full mold and V-process-full mold on the microstructure were found on the surface appearance in cast steel, but not in shperoidal graphite cast iron.

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