| 摘要 |
PROBLEM TO BE SOLVED: To provide a solder material wire at low cost, which solder material wire is excellent in machinability, and can solder an aluminum alloy casting product at a soldering temperature of 530 to 560°C. SOLUTION: A hollow sheath 1 made of an Al-Si alloy is filled with a Cu wire material 2 together with fluoride-based non-corrosive flux powder 3 containing cesium fluoride. When the sheath is made of an Al-Si alloy plate containing 5 to 15 mass% of Si, and the Cu wire material supplied in the sheath has become an Al-Cu-Si ternary alloy by being alloyed with the sheath material, it is preferable that the Cu wire material has a diameter corresponding to that containing 22 to 37 mass% of Cu in the ternary alloy. COPYRIGHT: (C)2007,JPO&INPIT
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