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高温铝钎剂基本上可以分为:覆盖剂、去膜剂和界面活性剂三个组成部分。研究了15个不同组分和组成的覆盖剂,发现LiCl-SrCl_2,LiCl-NaCl-KCl与CaCl_2-NaCl-KCl依次为良好的覆盖剂体系,排除了碘化物和溴化物使用的现实性;去膜剂由含氟的化合物构成.详细筛选了周期系中所有可能用作界面活性剂的金属氯化物,研究了它们对纯铝、Al-Mg2.8和Al-Cu4.9-Mg1.8等铝合金的作用特性,发现TlCl对各种母材都有突出的活性作用。铝钎焊过程中钎剂失效主要是由于活性的液态金属层消失。ZnCl_2最易失效,而TlCl最不易失效。针剂中絮状物主要是由LiCl脱水过程中产生的水解产物OH~-所造成。提出了适用于不同铝合金的最佳钎剂组成。
High-temperature aluminum flux can basically be divided into: covering agent, remover and surfactant three components. 15 different components and compositions were studied. It was found that LiCl-SrCl_2, LiCl-NaCl-KCl and CaCl_2-NaCl-KCl were in good order as covering agents, and the reality of using iodide and bromide was eliminated. The film consists of fluorine-containing compounds.All the metal chlorides that may be used as the surfactant in the periodic system were screened in detail and their effects on pure aluminum, Al-Mg2.8 and Al-Cu4.9-Mg1.8 The role of aluminum alloy and found that all kinds of base metals have TlCl prominent active role. Brazing flux failure during aluminum brazing was mainly due to the disappearance of the active liquid metal layer. ZnCl 2 is most likely to fail, while TlCl is the least susceptible to failure. The injection of floc in the LiCl dehydration process is mainly generated by the hydrolysis product OH ~ - caused. The optimum flux composition for different aluminum alloys is proposed.