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采用微小力学测试系统对经过高温老化的中温自反应精密钎焊铝蜂窝芯接头进行拉剪性能测试,并利用扫描电子显微镜及能谱仪对其进行显微组织形貌观察和成分分析,研究接头组织及成分变化与其耐高温老化性能的关系。结果表明:利用1060铝箔和铝合金复合钎焊板所制备的铝蜂窝芯在200℃高温老化12,24,36h后拉剪强度与未老化时相比均无明显下降,且接头的薄弱部分为靠近钎焊接头的母材部分。铝蜂窝芯接头组织形貌及成分分析显示,高温老化对钎缝组织中金属Zn,Sn含量影响不大且无新的化合物相形成;钎缝组织及成分不发生明显变化是蜂窝芯接头耐高温老化的主要原因。
The micro-mechanical testing system was used to test the tensile properties of the aluminum honeycomb core joints after medium-temperature self-reactive brazing with high temperature aging. The microstructure and morphology of the aluminum honeycomb core joints were observed and analyzed by scanning electron microscopy and energy dispersive spectroscopy. Relationship between changes of tissue and composition and aging resistance under high temperature. The results show that the tensile strength of aluminum honeycomb core prepared with 1060 aluminum foil and aluminum alloy brazing sheet has no obvious decrease after 12, 24, 36h aging at 200 ℃, and the weak part of the joint is Near the base metal part of the brazed joint. The microstructure and composition analysis of the aluminum honeycomb core joint showed that high temperature aging had little effect on the content of Zn and Sn in the braze joint and no new compound phase was formed. The microstructure and composition of the braze joint did not change obviously. The main reason for aging.