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Continuous Strip Casting, Microstructure and Properties of Au-Sn Soldering Alloy

机译：薄带连铸，金锡焊料合金的组织与性能

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摘要

This study tried to examine the suitability of strip casting processes such as PFC for soldering Au-Sn strips and to investigate changes in the microstructure and mechanical properties of the manufactured strips, following heat-treatment Optimal production conditions were established for Au-20%Sn strips and implemented to actually produce them. The inhomogeneous microstructure with indistinct phases that was present prior to heating was transformed into a homogeneous microstructure in which the continuous Au_5Sn phase surrounded the im-sized AuSn phases. Tensile results showed that the as-cast strip exhibited zero plasticity and a tensile strength of 338.3 MPa. After heating, the figure dropped somewhat while the plastic strain improved to 1.6 %. As for the enhanced plasticity in the heat-treated strip, the continuous pattern of the ductile Au_5Sn that surrounds the brittle AuSn was assumed to have caused plastic strain to take place on the boundaries of two phases, therefore resulting in the initiation and propagation of cracks.
机译：这项研究试图检验带材铸造工艺（如PFC）对Au-Sn锡带的焊接性，并研究热处理后制造的带材的显微组织和机械性能的变化，确定了Au-20％Sn的最佳生产条件并实施以实际生产它们。在加热之前存在的具有不明确相的不均匀微观结构被转变成均匀的微观结构，其中连续的Au_5Sn相包围了尺寸不小的AuSn相。拉伸结果表明，铸态带材表现出零塑性和338.3 MPa的拉伸强度。加热后，该值有所下降，而塑性应变提高到1.6％。至于在热处理后的带钢中增强的塑性，围绕脆性AuSn的韧性Au_5Sn的连续图案被认为已引起塑性应变在两相的边界上发生，因此导致了裂纹的产生和扩展。 。

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