球状黒鉛鋳鉄の材質に及ぼす缶キャップを分離したスチール缶ペレットの配合比の影響

抄録

  The authors attempted to use steel can pellets after removing the Al-Mg alloy of can cap parts using differences in the melting point of steel and Al, for melt-casting spheroidal graphite cast iron in a high-frequency furnace. They then examined differences in mechanical properties such as tensile strength and hardness and the microstructure of cast test specimens. Although tensile strength and hardness increased with an increase in the blending ratio of steel can pellets as an iron source, the specimen made by melting only steel can pellets as an iron source showed a remarkable drop in elongation. However, since abnormality in the microstructure was not recognized in all tested specimens, it is thought that material properties did not deteriorate when iron scrap was replaced with steel can pellets within the blending ratio of up to 60%. These test results suggest that steel can pellets used in this experiment can be utilized as a raw material for spheroidal graphite cast iron in blending ratios up to 60%.