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在高温钎焊中,例如不锈钢的钎焊,往往因钎焊结构本身形状关系,有的地方需要钎焊,有的地方则不需要钎焊。在钎焊过程中,为了不使钎料流到不需要钎焊的地方,就要用阻流剂来控制钎料流动。过去,在很长一段时间里,使用的阻流剂是氧化铝、氧化铬、氧化钛或氧化镁。这些阻流剂在涂到待钎焊工件上之前,要混以粘料,如,丙烯酸类粘料等,调合成糊状使用。同时,还要适当地控制钎料的数量。但是,在某些应用中,还不能完全令人满意,有时因钎料加的太多,钎料流动就会越过阻流剂,如果使用的钎料太少,又会钎焊不起来,
In high-temperature brazing, such as stainless steel brazing, often due to the shape of the brazed structure itself, in some places need to braze, and in some places do not need brazing. In the brazing process, in order not to flow the brazing material to the place which does not need brazing, it is necessary to use a flow control agent to control the brazing material flow. In the past, for a long time, the use of a flow-through agent was alumina, chromium oxide, titanium oxide or magnesium oxide. These flow inhibitors in the coating to be soldered on the workpiece, to be mixed with a sticky material, such as acrylic adhesive, blending into a paste to use. At the same time, but also to properly control the amount of solder. However, in some applications, it is not entirely satisfactory. Sometimes, due to too much brazing filler metal, the brazing filler metal will flow over the blocking agent. If too little brazing filler metal is used, brazing will not work.