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介绍了目前铝/铜焊接常见的焊接方法,阐述了各种方法的特点、应用及研究现状。铝/铜熔焊难度较大,应用较少。热压焊、摩擦焊、超声波焊等方法焊接质量较好.但成本较高。电阻焊焊接铝/铜管现已取得突破性进展,在生产中得到大量应用。钎焊由于自身的优点受到广泛关注,近年来成为研究的热点。电阻焊和钎焊有可能成为铝/铜焊接的发展方向。 相似文献
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利用Cu-Sn-Ti合金预连接CBN磨粒,并将其用电阻焊焊接在基体上,为有序排布CBN工具磨粒的精确固定和工具使用后损毁磨粒焊植修复做先期探索。通过差示扫描量热法对Cu-Sn-Ti合金热分析;使用扫描电镜分析预连接及电阻焊后磨粒的微观形貌;用拉曼光谱仪分析电阻焊试样及钎焊试样磨粒的应力;通过磨削试验研究电阻焊CBN磨粒的磨削性能。研究表明,在950℃保温120 s的预连接工艺下,CBN与Cu-Sn-Ti合金产生化学冶金结合。电阻焊后预连接层与基体预熔涂层熔合,焊缝未见裂纹、气孔、未熔合等缺陷,CBN磨粒仍然棱角分明。在距表面600μm处,钎焊CBN磨粒所受压应力σ=0.43 GPa,电阻焊CBN磨粒压应力为0.69 GPa,较大的压应力使电阻焊CBN磨粒受到更强的把持力。磨削试验显示,电阻焊CBN磨粒的稳定性及磨削效率优于钎焊CBN磨粒。 相似文献
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微连接和纳连接是微/纳级机械、电子和医疗等器件或系统结构制造的关键技术,综述其最新研究进展.针对电子封装,阐述无铅钎料的研制现状和铜引线键合新技术.针对医疗器件和铋系超导带材,分别介绍细丝、薄片连接的典型方法如微电阻焊、微激光焊和钎焊以及一步法扩散焊.对于碳纳米管,介绍电子束辐照连接、双壁碳纳米管薄膜卷覆法连接及钎焊.... 相似文献
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综述了目前常用的几种TiAl合金连接技术,包括电子束焊、摩擦焊、钎焊与扩散连接,对这几种连接方法进行了比较,并对其今后的发展方向进行了展望. 相似文献
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随着对汽车安全性能要求的日益提高,车顶的连接强度也越来越受到重视,尤其是当汽车发生碰撞而颠覆时,车顶的连接强度将直接影响车内乘务人员生命安全.车顶和侧围的连接也一直是白车身制造中的关键连接技术之一,着重介绍几种现有的车顶与侧围连接方式,如电阻点焊、激光焊接、激光钎焊、等离子钎焊、复合连接等,分别介绍它们成本、工艺、技术... 相似文献
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金属夹芯复合板及其制备技术的发展 总被引:2,自引:0,他引:2
简要介绍了各种金属夹芯复合板的结构形式、特点及其应用领域。阐述了金属夹芯复合板按照芯材的分类以及不同种类芯材的制备方法.结合芯材的制备技术重点介绍了蜂窝芯材的制备。在金属板面与芯材的各种连接技术中介绍了胶接、钎焊连接、缝焊、激光焊以及界面瞬间液相扩散轧制等连接方法。 相似文献
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Components made by joining different materials are required in various engineering applications. Fabrication of such components is a challenging task due to the vast difference in mechanical, thermal and electrical properties of the materials being used. Friction stir welding (FSW) is capable of joining dissimilar materials such as aluminum (Al) and copper (Cu) and therefore researchers have used this novel process for dissimilar joining. Consequently, several works pertaining to dissimilar joining, specifically Al-Cu, are available in the literature but they are scattered in different sources, which makes the task of gathering information about dissimilar FSW of Al-Cu cumbersome. This work has been written with an aim to provide all pertinent information related to dissimilar FSW of Al-Cu at one place to ease the problems of researchers. It comprehensively covers and summarizes the topics such as the effect of tool design and geometry, FSW process parameters, FSW strategies on mechanical properties, microstructure and formation of defects during dissimilar FSW of Al-Cu. In addition, it also presents and discusses several variants of dissimilar FSW of Al-Cu. Finally, this work not only puts forth major findings of the previous researchers but also suggests future recommendations for dissimilar FSW of Al-Cu. 相似文献
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《Science & Technology of Welding & Joining》2013,18(5):425-433
AbstractCold metal transfer (CMT) welding–brazing joining of Ti6Al4V and Al A6061-T6 was carried out using AlSi5 wire. The joining mechanisms and mechanical properties of the joints were identified and characterised by scanning electron microscope, energy dispersive spectroscopy and tensile–shear tests. Desired CMT joints with satisfied weld appearances and mechanical properties were achieved by overlapping Ti on the top of Al. The joints had dual characteristics of a welding joint on the aluminium side and a brazing joint on the titanium side. Three brazing interfaces were formed for the joint, which increased the strength of the joint. An intermetallic compound layer was formed at the brazing interface, which included Ti3Al, TiAl and TiAl3. Two different fracture modes were also observed: one fractured at the welding/brazing interface and weld metal and the other at the Al heat affected zone (HAZ). Clearly, the joints fractured at the Al HAZ had higher tensile strength than those fractured at the welding/brazing interface and weld metal. 相似文献
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对冷轧Al-Cu双层复合板进行搅拌摩擦焊接,获得了无缺陷的焊接接头。对搅拌摩擦焊过程中的金属流动行为和两层之间的混合进行了研究,考察了显微组织和硬度的变化。结果表明,在搅拌区的金属流动导致了在Cu层中前进侧生成条带状结构,在这些条带状结构中的细晶区域中,存在微量的Al颗粒和Al-Cu金属间化合物,这导致了其硬度的增加。 相似文献