Microstructure and Its Stability of Semi-Solid Fe-C Slurry by Powder Compaction

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  • 圧粉体加熱法による鉄-炭素系固液共存スラリーの組織とその安定性
  • アップンタイ カネツホウ ニヨル テツ タンソケイ コエキ キョウゾン スラリ

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  An investigation was carried out to clarify the microstructures of semi-solid Fe-C alloys made by the powder compaction of pure iron powders and cast iron powders with eutectic composition. In the rapid heating of mixed compact, the probability of the collisions of solids was much lower than that in the stirring method. The size of the solid particles was therefore expected to be much smaller than that in the stirring method. The shape of the solid particles was spheroidal as those acquired by the stirring method. The average size of the solid particles was 50 μm on the polished surface. The solid particles, which were former by pure iron, had martensite structure. The microstructure of matrix was fine ledeburite. It was found that the slurry made by the method had fine microstructure and stability of fine solid particles against isothermal holding ideal for thixocasting.

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