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Vacuum brazing furnaces are widely used in electronics, chemical engineering, petroleum, medical devices, tool manufacturing, and automotive manufacturing. The vacuum brazing process involves, under vacuum heating conditions, using liquid brazing filler metal with a lower melting point than the base metal to fill the gaps between the base metals through the capillary suction effect of the tiny gaps between two workpieces, thereby forming a firm joint. This process is mainly used for vacuum brazing of stainless steel, high-chromium alloys, copper, titanium alloys, superalloys, cemented carbides, etc.