Method for directly brazing nonmetal and metal at low temperature through commercial inactive brazing filler metal
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An inactive, non-metallic technology, applied in non-electric welding equipment, metal processing equipment, welding equipment, etc., can solve the problems of difficult preparation, complex process, non-environmental metallization of non-metallic surface, etc., achieve simple process and avoid excessive reaction , using a wide range of effects
Pending Publication Date: 2022-07-29
HARBIN INST OF TECH
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[0006] The purpose of the present invention is to solve the difficulties in the preparation of low-temperature active solder for non-metal and metal brazing, and the problems of non-environmental protection and complicated process in non-metal surface metallization, and to provide a commercial non-active solder low-temperature direct brazing The method of welding non-metal and metal
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specific Embodiment approach 1
[0028] Embodiment 1: The present embodiment is a method for directly brazing non-metals and metals with commercial inactive solder at low temperature, which is realized according to the following steps:
[0029] 1. Cut the non-metallic material to be welded into shape, then carry out grinding and polishing treatment, and then put it into acetone and anhydrous ethanol for ultrasonic cleaning in turn, take it out and dry it to obtain the processed non-metallic material to be welded;
[0030] 2. After removing the oxide film on the surface of the metal to be welded and the brazing filler metal, put it into acetone for ultrasonic cleaning, take it out and dry it to obtain the processed metal to be welded and the brazing filler metal;
[0031] 3. Place the non-metallic material to be welded, the brazing filler metal and the clamp for the metal to be welded after the above treatment on the brazing heating platform, and heat the non-metallic material to be welded and the metal to be w...
specific Embodiment approach 2
[0033] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the non-metallic materials to be welded in step 1: carbide ceramics, nitride ceramics, oxide ceramics, boride ceramics, ceramic matrix composite materials, glass, graphite , C / C composites, diamond or graphene. Other steps and parameters are the same as in the first embodiment.
specific Embodiment approach 3
[0034] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the cutting in step 1: a diamond internal circular cutting machine is used. Other steps and parameters are the same as in the first or second embodiment.
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Abstract
The invention discloses a method for directly brazing nonmetal and metal at a low temperature through commercial inactive brazing filler metal, and belongs to the technical field of welding. The problems that an existing nonmetal and metal brazing low-temperature active brazing filler metal is difficult to prepare, nonmetal surface metallization is not environmentally friendly, and the technology is complex are solved. The method comprises the steps that firstly, a to-be-welded nonmetal material is pretreated; secondly, metal to be welded and brazing filler metal are pretreated; and 3, heating the treated to-be-welded non-metallic material, the brazing filler metal and the to-be-welded metal, performing ultrasonic welding, and performing furnace cooling. According to the invention, the commercial non-active Sn-based brazing filler metal is used for brazing the non-metallic material, so that a complex and immature brazing filler metal preparation process of the active brazing filler metal is avoided; the excessive reaction of the active elements and the brazing filler metal matrix is avoided; direct connection of the brazing filler metal and the non-metallic material under the low-temperature condition is achieved; the process is simple, soldering flux is not used, the green and environment-friendly concept is compounded, the time required by brazing is short, and the production efficiency is improved. The method is suitable for low-temperature direct brazing of nonmetal and metal through commercial non-active brazing filler metal.
Description
technical field [0001] The invention belongs to the technical field of welding, and in particular relates to a method for directly brazing non-metals and metals at low temperature with commercial non-active brazing filler metals. Background technique [0002] With the rise and application of power devices, especially third-generation semiconductors, semiconductor devices are gradually developing in the direction of high power, miniaturization, integration, and multi-function, which also puts forward higher requirements for the performance of packaging substrates. In practical applications, in order to meet the heat dissipation requirements of electronic devices, low-temperature brazing of ceramics and metal substrates is usually required, and achieving reliable connection between ceramics and metals is the key to promoting the application of ceramic materials. There are big differences between metals and ceramics in terms of physical and chemical properties. Ceramics are mai...
Claims
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