Arc welding-brazing method for pre-coating titanium alloy and aluminum alloy

A technology of aluminum alloy and titanium alloy, which is applied in the direction of arc welding equipment, welding medium, welding equipment, etc., can solve the problems of expensive production cycle of connecting equipment, thick hard and brittle intermetallic compounds, and low bonding strength of joints, and achieve low manufacturing cost , short production cycle, and the effect of improving mechanical properties

Inactive Publication Date: 2013-06-12
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to solve the problem of thicker hard and brittle intermetallic compounds, cracks or intermittent micro-cracks, low joint bonding strength, To solve the technical problems of expensive connection equipment and long production cycle, etc., at the same time, to improve the welding speed and joint performance of the existing arc melting and brazing Ti and Al dissimilar alloys, a method of arc melting and brazing of pre-coated titanium alloy and aluminum alloy is proposed

Method used

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  • Arc welding-brazing method for pre-coating titanium alloy and aluminum alloy
  • Arc welding-brazing method for pre-coating titanium alloy and aluminum alloy
  • Arc welding-brazing method for pre-coating titanium alloy and aluminum alloy

Examples

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Effect test

Embodiment 1

[0032] (1) Clean the surface of the titanium alloy plate and the aluminum alloy plate, and process a 45° groove at the welding position;

[0033] (2) Dissolve the aluminum alloy brazing flux in acetone to form a suspension, and evenly brush it on the front and back of the dipping position of the titanium plate to form a thin brazing flux layer with a thickness of 0.2-0.5mm;

[0034] (3) Immerse the titanium alloy plate coated with flux into pure aluminum in a molten state at a temperature of 750-800°C, keep the temperature constant for 1-3min, and then pull out the titanium plate at a constant speed of 2cm / s to achieve hot dipping plating;

[0035] (4), grinding the aluminum alloy layer dipped on the surface of the titanium alloy plate, the thickness of the aluminum alloy layer after grinding is uniform and smooth, and the thickness is 20-30 μm;

[0036](5) Fix the parts to be welded between the titanium alloy plate and the aluminum alloy plate after immersion plating on the ...

Embodiment 2

[0042] The difference between this embodiment and the first embodiment is that the titanium alloy in the titanium alloy plate in the first step is TA and TB series alloys. Other steps and parameters are the same as in the first embodiment.

Embodiment 3

[0044] The difference between this embodiment and the specific embodiment 1 is: in step 1, the aluminum alloy in the aluminum alloy and its composite material plate is LY, LD series alloy or pure aluminum. Other steps and parameters are the same as in the first embodiment.

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Abstract

The invention relates to an arc welding-brazing method for pre-coating a titanium alloy and an aluminum alloy, which comprises the following steps that surface cleaning is conducted on a titanium plate; surface aluminizing is then conducted on the titanium plate; an aluminum alloy welding wire is added in an arc welding-brazing manner; a fusion welded joint is formed on the side of the aluminum alloy by controlling a welding speed and heat input quantity; a brazed joint is formed on the side of the titanium alloy; and the titanium alloy is connected with the aluminum alloy. Growth of an intermetallic compound is controlled in immersion coating and welding processes, mechanical properties of the joints are improved, and the connection is reliable without fracture, so that various requirements on a titanium alloy and aluminum alloy composite structure in engineering can be further met. The method has the advantages of simple technological method, low manufacturing cost, short production period and the like.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to an arc melting and brazing method of a pre-coated titanium alloy and an aluminum alloy. Background technique [0002] Titanium alloy has a series of advantages such as low density, high specific strength, good corrosion resistance and heat resistance. After years of development, it has been more and more widely used in the fields of aerospace, marine engineering, automobile and chemical industry. . China's titanium industry is developing rapidly, and the biggest problem restricting the application of titanium alloys is high cost. Although the strength of aluminum and its aluminum alloys is not as good as that of titanium alloys, its low price and smaller density more meet the needs of the market, especially the emergence of some high-strength aluminum alloys, making aluminum alloys a substitute for titanium in some components. The most ideal material for alloys. As another li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K1/20B23K1/19B23K35/28B23K9/167B23K103/18
Inventor 吕世雄崔庆龙黄永宪郑传奇徐永强郑祖金曲杰
Owner HARBIN INST OF TECH
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