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Ultrasonic assisted flame brazing method for titanium and aluminum dissimilar metal

An ultrasonic-assisted, flame brazing technology, applied in metal processing equipment, welding media, welding equipment, etc., can solve the problems that aluminum-based brazing filler metals are difficult to wet the titanium base material, so as to improve the wetting and spreading ability, reduce defects, The effect of improving joint performance

Active Publication Date: 2013-06-12
安徽万宇机械设备科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide an ultrasonic-assisted flame brazing method for titanium and aluminum dissimilar metals, which solves the problem that the aluminum-based solder is difficult to wet the titanium base material in the ordinary brazing process, and realizes reliable brazing of titanium and aluminum dissimilar metals

Method used

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  • Ultrasonic assisted flame brazing method for titanium and aluminum dissimilar metal
  • Ultrasonic assisted flame brazing method for titanium and aluminum dissimilar metal
  • Ultrasonic assisted flame brazing method for titanium and aluminum dissimilar metal

Examples

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Embodiment 1

[0030] The invention provides a method for ultrasonically assisted flame brazing of titanium and aluminum dissimilar metals, which comprises the following steps:

[0031] (1) Hot-dip aluminum plating

[0032] Cut the pure aluminum welding wire that has been wiped with acetone to remove oil stains into small pieces and put it into the graphite crucible 2, put the graphite crucible 2 into a furnace with a heating wire 4 and heat it to 700°C to melt the pure aluminum welding wire, and keep it warm for more than half an hour to ensure The temperature of molten aluminum 3 is homogenized. Clean the end of the connected titanium plate 1 with sandpaper and wash with acetone to remove the oxide film and oil. Dissolve NOCOLOK brazing flux in acetone to form a suspension, and brush it on the front and back surfaces with a width of 10 mm at the end of the titanium plate 1 . After the acetone is volatilized, the titanium plate 1 on the side coated with the flux is vertically immersed in ...

Embodiment 2

[0036] A kind of titanium, aluminum dissimilar metal ultrasonic-assisted flame brazing method, it comprises the following steps:

[0037] (1) Hot-dip aluminum plating

[0038] Cut the pure aluminum welding wire that has been wiped with acetone to remove oil stains into small pieces and put it into the graphite crucible 2, put the graphite crucible 2 into a furnace with a heating wire 4 and heat it to 750°C to melt the pure aluminum welding wire, and keep it warm for more than half an hour to ensure The temperature of molten aluminum 3 is homogenized. Clean the end of the connected titanium plate 1 with sandpaper and wash with acetone to remove the oxide film and oil. Dissolve NOCOLOK brazing flux in acetone to form a suspension, and brush it on the front and back surfaces with a width of 20 mm at the end of the titanium plate 1 . After the acetone is volatilized, the titanium plate 1 on the side coated with the flux is vertically immersed in the aluminum liquid 3 , kept for ...

Embodiment 3

[0043] The base material is 50mm×40mm×2mm TC4 titanium alloy plate and pure aluminum aluminum plate. Cut the cleaned pure aluminum welding wire into small pieces and put them into a graphite crucible. Put the crucible into an electric furnace and heat it to 750°C. Keep it warm for one hour to make the molten aluminum Homogenize the temperature. Dissolve chloride, fluoride mixed flux or NOCOLOK flux in acetone to make a suspension, and then apply it to the front and back sides within 15mm of the edge of the titanium plate. After air-drying, immerse the flux-coated side of the titanium plate vertically In the molten aluminum, after dipping for 1 min, the titanium plate is pulled out at a constant speed of 2 cm / s, and cooled naturally. Clean the overlapping part of the aluminum plate with sandpaper and acetone to remove oxides and oil stains, apply fluoride flux to the overlapping part of the aluminized titanium plate and the aluminum plate and assemble it into a lap joint with a...

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Abstract

The invention relates to an ultrasonic assisted flame brazing method for titanium and aluminum dissimilar metal, which comprises the steps of conducting hot dip aluminum plating on a titanium plate before brazing to form an aluminizing layer in a certain thickness on the surface of the titanium plate, heating with combustible gas flame to melt an NOCOLOK brazing flux and aluminum silicon brazing filler metal, applying ultrasonic vibration on an overlapping part of a joint till the aluminum silicon brazing filler metal is solidified, and obtaining a titanium and aluminum overlap joint. The method has the main characteristics that the subsequent titanium and aluminum brazing is changed into the brazing of an aluminum plate and the aluminizing layer; the method improves wet spreading ability of the aluminum silicon brazing filler metal on the surface of the aluminized titanium plate and solves the problem that the aluminum silicon brazing filler metal difficultly wets a titanium base during the brazing; layered continuous distribution of an intermetallic compound on a brazing interface reaction layer of the joint is broken; the intermetallic compound is granulated and diffused; and the method facilitates acquirement of the high-quality titanium and aluminum dissimilar metal brazed joint.

Description

technical field [0001] The invention relates to the technical field of welding, in particular to an ultrasonic-assisted flame brazing method for titanium and aluminum dissimilar metals. Background technique [0002] As lightweight and high-strength materials, titanium alloys and aluminum alloys have been widely used in the fields of aviation, aerospace and automobiles. Titanium alloys have high specific strength, excellent low-temperature toughness, and good corrosion resistance, but their high cost severely limits the large-scale applications of titanium alloys. Aluminum alloy has good plasticity and toughness, light specific gravity, and compared with titanium alloy, aluminum alloy has obvious advantages in cost. However, aluminum alloy has poor strength and heat resistance, which also limits its further application. Titanium-aluminum dissimilar metal composite components can not only take into account the respective characteristics of the two metals, get the best use of ...

Claims

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Application Information

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IPC IPC(8): B23K1/20B23K1/06B23K1/19B23K35/363B23K103/18
Inventor 吕世雄徐永强黄永宪崔庆龙郑传奇
Owner 安徽万宇机械设备科技有限公司
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