抄録
In cast-in bonding, insert may melt and be damaged by excessive heat supply from the molten metal. To reveal the conditions of insert melting, two experiments were performed and the solidification and melting transient process was analyzed by the finite difference method. Mild steel and ductile cast iron bars were dipped into gray iron melt held at three temperatures. Cast-in insertion experiment on the same materials with various diameters was also performed. The experiment and the analysis showed that the melting of ductile cast iron bars was determined by heat transfer. The melting of mild steel is determined by the carbon diffusion, because increasing carbon concentration and decreasing of melting temperature are necessary for mild steel to melt.
