| 摘要 |
PROBLEM TO BE SOLVED: To produce a cast iron product to which tin used in a metal bath is not stuck. SOLUTION: Before austenizing the cast iron, the cast iron is coated with a surface treating material which is not reacted with molten tin (surface treating process) so that the cast iron is not brought into direct contact with the molten tin. Besides, in an austemper treatment, after dipping the cast iron into the molten tin, the cast iron is exposed to the atmosphere having the same temperature as the temperature of the metal bath (atmospheric bath process) to remove the molten tin under sticking process. Further, after the austemper treatment of the cast iron, the cast iron dipped into the molten tin, is taken out and the cast iron is dipped into cooling liquid for a prescribed time (rapid cooling process) to remove the stuck molten tin.
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