前言近年来,国外对铝及其合金的真空钎焊进行了多方面的研究,其目的是以真空钎焊代替老的钎剂钎焊和盐浴钎焊。铝及其合金的真空钎焊比钎剂钎焊和盐浴钎焊具有明显的优点:第一,无毒和无污染;第二,不需焊后清洗,节省人力物力,且不会造成焊后腐蚀;第三,变形量小,不需焊后修正。这些突出的优点对焊后无法清洗和无法修正的高精度铝波导是非常必要的。所以,铝波导 Foreword In recent years, foreign vacuum brazing of aluminum and its alloys conducted a number of studies, the purpose is to replace the old vacuum brazing brazing and salt bath brazing. Vacuum brazing of aluminum and its alloys has obvious advantages over brazing flux and salt bath brazing. First, it is non-toxic and non-polluting. Second, it requires no post-weld cleaning and saves manpower and material resources without causing welding After corrosion; Third, the deformation is small, without welding correction. These outstanding advantages of the can not be cleaned after welding and can not be corrected precision aluminum waveguide is very necessary. So, aluminum waveguide