国外近十几年来研究了各种各样的螺旋线焊接工艺,为了便于比较,归纳如下(见图1): 钼锰法、活性法、玻璃焊料法是最早用于螺旋线焊接的工艺。由于这些工艺有热传导差,高频损耗大等缺点,对于高频率、大功率的行波管是不合适的,本文就不予以介绍。下面仅 Nearly a decade abroad to study a variety of helical welding process, in order to facilitate comparison, summarized as follows (see Figure 1): molybdenum manganese method, active method, glass solder method is the earliest used in spiral welding process. As these processes have poor heat conduction, high frequency loss and other shortcomings, for high frequency, high power traveling wave tube is not suitable, this article will not be introduced. Only below