| 摘要 |
PROBLEM TO BE SOLVED: To provide a seal fused joining method, especially, suitable to parts, such as valve, with which a seal fused joining can be applied and working of a base material for screwing and calking, is unnecessitated and man-hour is reduced with the joining method with insert casting. SOLUTION: In a method for integrally joining a insert casting main material 1 and a material 2 by pouring molten metal into a mold disposing the material 2, this seal joining method, is characterized, in that both materials are integrally joined under the state of seal-fused joining at least a part of the material 2 and the main material 1 by regulating calorie supplied into the material 2 from the molten metal to not less than a calculated calorie when the molten metal is poured.
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