| 摘要 |
PROBLEM TO BE SOLVED: To provide a die-casting die in which cracks and peeling of a coating layer are hard to occur in the surface due to molten metal to be cast and which has excellent heat checking resistance, and to provide a surface treatment method therefor. SOLUTION: The die-casting die 1 used for casting a molten metal includes: a first layer 4 applied to at least a surface 3 including a cavity among the surfaces 3 in the die casting die, composed of at least one kind of metal selected from the group IVA, VA and VIA (such as Ti, V and Cr) or their alloys and having a micro-Vickers hardness of≤1,000 Hv and a thickness of 1 to 30μm; and a second layer 6 applied to the surface of the first layer 4, and composed of a carbide (such as TiC), a nitride (such as TiN), an oxide (such as Cr<SB>2</SB>O<SB>3</SB>) or a carbonitride (such as TiCN) with at least one kind of metal selected from the group IVA, VA and VIA. COPYRIGHT: (C)2008,JPO&INPIT
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