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A kind of aluminum alloy material and application for high temperature brazing aluminum/steel composite strip

An aluminum alloy material and aluminum alloy technology, applied in the direction of welding/cutting medium/material, welding medium, welding equipment, etc., can solve problems such as easy peeling off of the aluminum layer, product failure, and reduction of the interface strength of the aluminum/steel composite strip. Overcomes the effect of low binding strength

Active Publication Date: 2016-07-06
BEIJING UNIV OF TECH
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  • Description
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Problems solved by technology

Its disadvantages are: when ordinary 1050 aluminum alloy and steel strip are combined and brazed at high temperature, Fe-Al brittle compounds are easily produced at the aluminum / steel composite interface, thereby reducing the interface strength of the aluminum / steel composite strip
This is because at 600°C, the state of the aluminum alloy matrix added with Si will change from solid to semi-solid, and its reaction diffusion speed is faster. At this time, a large amount of Fe-Al, Fe-Al-Si phase, easy to cause the aluminum layer to fall off and product failure

Method used

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  • A kind of aluminum alloy material and application for high temperature brazing aluminum/steel composite strip
  • A kind of aluminum alloy material and application for high temperature brazing aluminum/steel composite strip
  • A kind of aluminum alloy material and application for high temperature brazing aluminum/steel composite strip

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Effect test

Embodiment 1

[0021] Example 1: The Al-0.8Si-0.05Er / steel heat treatment+simulated brazing treatment interface prepared by the aluminum alloy in A4 does not observe the existence of interface compounds, and the interface bonding is good, see figure 1 .

Embodiment 2

[0022] Example 2: The Al-0.8Si-0.10Er / steel heat treatment+brazing treatment interface in A5 also does not observe the existence of interface compounds, and the interface bonding situation is good, see figure 2 .

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Abstract

The invention discloses an aluminum alloy material for a high-temperature-resistant brazing aluminum / steel composite strip and an application of the aluminum alloy material, belonging to the technical field of alloy materials. 0.055-0.10% of Er is added into an aluminum matrix containing 0.76+ / -0.10% of Si. The problem of low interface strength of an aluminum / steel composite strip produced by using common 1050 alloy can be effectively solved through compounding the alloy prepared by the invention and steel. The Al-Si-Er / steel composite strip can be applied to high-temperature-resistant brazing, and no brittle intermetallic compounds are generated on an interface.

Description

technical field [0001] The invention relates to an aluminum alloy used for processing a high-temperature brazing aluminum / steel composite strip and a preparation process thereof, belonging to the technical field of alloy materials. technical background [0002] At present, the aluminum alloy matrix used for processing aluminum / steel composite strips mostly adopts 1050 aluminum alloy. Its disadvantages are: when ordinary 1050 aluminum alloy and steel strip are combined and brazed at high temperature, Fe-Al brittle compounds are easily produced at the aluminum / steel composite interface, thereby reducing the interface strength of the aluminum / steel composite strip. Adding Si to the 1050 aluminum alloy matrix can suppress the generation of interfacial brittle phase at low temperature. However, when the temperature is higher, H. Springer’s research shows that at 600°C, the intermetallic compounds produced by the Al-5wt.%Si / steel interface reaction are much more than those produc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/02B23K35/22
Inventor 高坤元茹文霞聂祚仁文胜平黄晖
Owner BEIJING UNIV OF TECH
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