一、前言随着科学技术的迅速发展,电子设备的种类不仅逐步增多,而且对可靠性的要求越来越高,相应地对电气装配焊接也提出了更高的要求,特别是使用在恶劣环境条件的,如空间电子设备等,要求电气装配焊接的质量就更加严格,其中锡钎焊质量的好坏,将直接影响到设备的可靠性。显然,要使它能适应环境条件和满足高可靠性的要求,除了要有一定的工具、设备及选择合理的工艺途径来保证外,还与被焊金属的材料、焊料以 I. Preface With the rapid development of science and technology, the types of electronic equipment not only gradually increase, but also the requirements for reliability are getting higher and higher. Correspondingly, higher demands are placed on the welding of electrical assembly, especially in harsh environments Conditions, such as space electronic equipment, require more stringent quality of electrical assembly welding, soldering tin quality, which will directly affect the reliability of the equipment. Obviously, to make it to adapt to environmental conditions and meet the requirements of high reliability, in addition to have certain tools, equipment and choose a reasonable way to ensure that the process, but also with the welded metal materials, solder