| 摘要 |
PROBLEM TO BE SOLVED: To provide an exothermic assembly for casting excellent in the feeding effect. SOLUTION: This assembly has a matrix composed of the exothermic material and a refractoriness aggregate and dispersedly embeds glass-made hollow fine spherical bodies in this matrix. In the case of fitting the exothermic assembly for casting, e.g. as the typical example, the exothermic feeder head sleeve to the feeder head part in the mold, the glass-made hollow fine spherical bodies embedded in the dispersion state in the matrix are melted and dispersed with the reaction heat of the exothermic material caused by the heat of molten metal cast in the mold and the molten metal heat, and the matrix is made porous. In this result, in the solidifying process of the molten metal, the high heat retaining property and the refractoriness in the feeder head sleeve are held, and the excellent feeder head effect is displayed and the yield of a casting, particularly a cast steel product can remarkably be improved.
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