A kind of vacuum brazing method of titanium alloy and aluminum alloy solder pre-coating
A brazing method and titanium alloy technology, applied in welding equipment, metal processing equipment, manufacturing tools, etc., can solve the problems of difficult wetting of aluminum-based solder in the connection process, low joint bonding strength, cracks, etc., and achieve improved wetting The effect of spreading ability, low manufacturing cost and simple process method
Active Publication Date: 2015-12-02
浙江润光照明科技有限公司
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Problems solved by technology
[0005] The purpose of the present invention is to provide a pre-coated vacuum brazing method for titanium alloy and aluminum alloy solder, which solves the technical problems of hard and thick brittle intermetallic compounds at the interface, low joint bonding strength, and cracks in other methods , optimized the problem that the aluminum-based solder is difficult to wet the titanium base metal and the connection process is cumbersome in the ordinary brazing process, and realized the reliable brazing of titanium alloy and aluminum alloy
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Embodiment 1
[0027] The invention provides a vacuum brazing method for titanium alloy and aluminum alloy solder pre-coating, such as Figure 1-4 It is the main process diagram; the base material is 50mm×40mm×2mm TC4 titanium alloy plate 2 and pure aluminum plate 8, and the coating material is AlSi12 whose melting point is lower than that of the aluminum base material. During the brazing process, the coating melts and acts as a solder, and is welded with the aluminum plate together. Flux 3 is a suspension prepared by dissolving NOCOLOK, a fluoride flux, in acetone. Apply flux 3 to a range of 15 mm wide at one end of the titanium alloy plate, and let it dry naturally; cut the cleaned AlSi12 welding wire into small pieces and put Put the graphite crucible 1 into the electric furnace and heat it to 750°C. After the AlSi12 welding wire is completely melted, keep it warm for one hour to homogenize the temperature of the molten aluminum. The end of the titanium plate coated with flux is vertical...
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Abstract
The invention relates to a brazing filler metal precoating vacuum brazing method for a titanium alloy and an aluminum alloy. The method comprises the steps of: (1) conducting surface cleaning on a titanium alloy plate and an aluminum alloy plate, (2) coating and airing a plating assistant at a to-be-brazed part of the titanium alloy plate, (3) placing the to-be-brazed part of the titanium alloy plate in a brazing filler metal pool for processing for a period of time, (4) grinding a brazing filler metal layer coated on the titanium alloy plate, requiring the brazing filler metal layer to be smooth and uniform in thickness, and (5) overlapping the to-be-brazed parts of the titanium alloy plate and the aluminum alloy plate, and placing in a vacuum brazier for brazing. With the adoption of the brazing method, the connection is reliable and is not broken; the technique is simple; the manufacturing cost is low; the brazing is conducted in the vacuum brazier; an oxidation film is prevented from being generated on the surface of the aluminum alloy due to a vacuum atmosphere; titanium is prevented from reacting with active gas; smooth wet spreading is ensured; and the method facilitates improving the quality of a brazed joint.
Description
technical field [0001] The invention relates to the field of welding technology, in particular to a vacuum brazing method for pre-coating titanium alloy and aluminum alloy solder. Background technique [0002] Titanium and titanium alloys have the advantages of light weight, high specific strength, good fracture toughness and corrosion resistance. After decades of development, they have been proved to be good in process performance and high in use value in the fields of aerospace, automobiles and ships. Material. During 2004-2006, the global consumption of titanium alloy increased by nearly 50%, and the demand in aerospace and other fields gradually increased, and it developed rapidly in emerging application fields such as automobile chemical industry. At the same time, the application of titanium alloys in passenger cars and sports cars is becoming more and more extensive. At present, it has been applied in cars of brands such as Toyota, Honda, Ferrari and Porsche. Howeve...
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IPC IPC(8): B23K1/20B23K1/19B23K1/008
Inventor 吕世雄郑传奇黄永宪崔庆龙徐永强
Owner 浙江润光照明科技有限公司