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扩散焊是一种新的焊接方法,近20年来,美、苏等国已用于飞机制造、宇航和原子能工业中;对于可焊性差的异种材料(如金属与玻璃或陶瓷)、复合材料以及难以用熔化焊焊接的构件,尤为适用。扩散焊的原理简单,它是借助温度(低于被焊工件的熔点)、压力、时间及真空度等条件,促使两固态金属紧密接触,通过原子间的相互扩散而实现固相的结合。它在整个焊接过程中均需加压和加热,并保持较长的时间。扩散法具有下列优点:1)可用于两种易形成脆性化合物且熔点和热膨
Diffusion welding is a new welding method. For the past 20 years, the United States, the Soviet Union and other countries have been used in the aircraft manufacturing, aerospace and atomic energy industries; dissimilar materials with poor solderability (such as metals and glass or ceramics), composites and Especially difficult to use fusion welded components. The principle of diffusion welding is simple, it is through the temperature (lower than the melting point of the workpiece being welded), pressure, time and vacuum conditions, prompting the two solid metal in close contact through the atomic diffusion between the solid phase combination. It needs to be pressurized and heated throughout the welding process and held for a longer period of time. Diffusion method has the following advantages: 1) can be used to form two kinds of easily brittle compounds and melting point and thermal expansion