| 摘要 |
PROBLEM TO BE SOLVED: To provide mixed powder for brazing capable the filling the gap with small amount of the brazing filler metal. SOLUTION: In the mixed powder consisting of Al-Si two-element hyper- eutectic alloy powder containing 13-45% Si and the balance Al with inevitable impurities, and Si powder, the Al-Si two-element hyper-eutectic alloy powder contained in the mixed powder and the Si powder arc mixed so that 15-60% Si is contained in total, the mean grain size of the Al-Si two-element hyper- eutectic alloy powder is in the range of 5-100μm, the mean grain size of Si powder is in the range of 1-50μm, and the mean grain size of the Al-Si two- element hyper-eutectic alloy powder is relatively larger than that of the Si powder.
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