【摘要】 对不同金属型预热温度下铸造Sn-2.0Ag-0.7Cu钎料合金的力学性能、物理性能及润湿性与传统Sn-37Pb钎料进行了对比研究。试验结果表明:较快的冷却速度使Sn-2.0Ag-0.7Cu钎料合金具有较高的抗拉强度和伸长率,较窄的固-液相线温度区间,合金的润湿性有所改善,但电导率变化不大。更多还原

【Abstract】 The mechanical properties, physical properties and wettability of Sn-2.0Ag-0.7Cu solder alloys cast by permanent mould with different preheating temperature were investigated, and were compared with traditional Sn-37Pb solder. The results show that the rapider cooling rate can contribute to the higher tensile strength and the better elongation of Sn-2.0Ag-0.7Cu solder, and the narrower range of the solidus-liquidus temperature. The wettability is also improved to some degree, but the conductivity doesn′t change greatly.更多还原