研究一系列Al?Si?Ge钎料用于铝钎焊，并对钎料合金的显微组织和性能进行分析。结果表明：Al?12Si共晶合金中添加从0到30%(质量分数)的Ge，可使Al?Si?Ge钎料合金的液相线温度由592°C下降到519°C。随着Ge含量的增加，形成了Al?Ge 共晶组织。然而，当Ge含量超过20%时，共晶组织趋于聚集长大，钎料合金中形成粗大颗粒状的初生 Si?Ge 相，这些粗大组织的形成极大地降低了钎料合金的性能。Al?10.8Si?10Ge 钎料具有优良的加工性能和铺展润湿性，当采用此钎料钎焊1060纯铝时，可以获得完整的钎焊接头，剪切测试结果表明此钎料钎焊接头的断裂位置发生在母材。
A series of Al?Si?Ge filler metals were studied for brazing aluminum. The microstructures and properties of the filler metals were investigated systematically. The results show that the liquidus temperature of Al?Si?Ge filler metals drops from 592 to 519 °C as the content of Ge increases from 0 to 30% (mass fraction). As the content of Ge increases, bright eutectic Ge forms. However, as the Ge content exceeds 20%, the aggregation growth of the eutectic structure tends to happen and coarsened primary Si?Ge particle forms, which is detrimental to the properties of alloys. The Al?10.8Si?10Ge filler metal has good processability and wettability with the base metal Al. When this filler metal is used to braze 1060 aluminum, the complete joint can be achieved. Furthermore, the shear strength test results show that the fracture of brazed joint with Al?10.8Si?10Ge filler metal occurs in the base metal.
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