采用CsF-AlF3中温无腐蚀钎剂能够去除LY12铝合金表面复杂的氧化膜, 实现LY12铝合金的中温钎焊.研究发现: 改进的CsF-AlF3钎剂是以反应、溶解方式去除氧化膜的; 在去膜过程中, CsF化合物起主要去膜作用, 钎剂的高活性与NH4F、NH4AlF4及复合盐熔体等化合物的存在有关, 它们的存在可提高CsF-AlF3钎剂的去膜能力, 而HF的生成则是诱发和加速反应、提高溶解去膜能力的关键;微量稀土元素镧未在界面出现富集现象,微量的稀土氟化物则起着"助溶"的作用.
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