Method for detecting interface binding strength of aluminum-steel composite material for soldering

A composite material and interface combination technology, which is applied in the direction of analyzing materials, measuring devices, and adopting mechanical devices, can solve problems such as unsatisfactory bending test results, unsuitable leader preparation, and low tensile strength, so as to ensure correct peeling, Elimination of peeling operation, high process precision effect

Active Publication Date: 2014-05-07
银邦(安徽)新能源材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Generally, the bending test is used to detect the bonding effect, but the bending test can only qualitatively detect the bonding fastness of the interface. The rolled aluminum-steel composite materials that pass the bending may still have delamination at the aluminum-steel interface during brazing. The effect of the folding test is not ideal; the peeling test can be used to quantitatively measure the bonding fastness of the metal-to-metal bonded interface, such as figure 1 shown, but it is necessary to make stretching heads 3 and 4 on the metal samples 1 and 2. Since the free ends of the aluminum layer and the steel layer of the randomly cut aluminum-steel composite sample are connected and closed, it is necessary to The aluminum layer is peeled off from the steel layer, but because the aluminum layer is too thin, it is difficult to peel off, and the tensile strength is low, it is not suitable for the preparation of the leader, so the application of the peeling test on the aluminum-steel composite material is largely limited
How to successfully implement the peeling test of thin-coated composite materials has not yet found a feasible solution at home and abroad

Method used

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  • Method for detecting interface binding strength of aluminum-steel composite material for soldering
  • Method for detecting interface binding strength of aluminum-steel composite material for soldering
  • Method for detecting interface binding strength of aluminum-steel composite material for soldering

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Embodiment 1

[0026] In this embodiment, the metal reinforcement layer is a 4343 / 3003 single-sided aluminum alloy composite strip, 10 in the figure is a 3003 aluminum layer, which is used as the base layer, and 11 is a 4343 aluminum layer, which is used as a skin layer for brazing connection with the sample.

[0027] A method for detecting the interfacial bonding fastness of aluminum-steel composite materials for brazing, such as figure 2 As shown, the specific steps are as follows:

[0028] 1. Cut sample 5 and single-sided aluminum alloy composite strip 9 with a thickness of 1.5mm, a length of 200mm, and a width of 25mm. The length of sample 5 is parallel to the rolling direction, and the single-sided aluminum alloy composite strip 9 is 4343 The thickness of the aluminum layer 11 is 0.12mm;

[0029] 2. Bend the free end one 8 of the sample on the same side and the free end two 12 of the single-sided aluminum alloy composite strip 9 outward by 90°, so that the sample after brazing forms a...

Embodiment 2

[0035] In this embodiment, the metal reinforcing layer is 4343 / 3003 / 3003 double-sided aluminum alloy composite strip, image 3 Among them, 14 is the 4343 aluminum layer, which is used as the skin layer brazed with the aluminum layer of the sample, and 15 is the 3003 aluminum layer, which is used as the base layer.

[0036] A method for detecting the interfacial bonding fastness of aluminum-steel composite materials for brazing, such as image 3 As shown, the specific steps are as follows:

[0037]1. Cut sample one 16, sample two 20, and a double-sided aluminum alloy composite strip 13 with a thickness of 1.5mm and a width of 25mm. The length of samples 16 and 20 is 200mm, and the strength of the double-sided aluminum alloy composite strip 13 is 150mm, the length of sample one 16 and sample two 20 is parallel to the rolling direction, wherein the thickness of the 4343 aluminum layer of the double-sided aluminum alloy composite strip 13 is 0.12mm;

[0038] 2. Bend the free end...

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Abstract

The invention provides a method for detecting the interface binding strength of an aluminum-steel composite material for soldering. The method can be used for accurately detecting the aluminum-steel interface binding strength and quantifying the interface binding effect of the aluminum-steel composite material for the soldering. The method comprises the following steps: firstly, preparing a test sample of the aluminum-steel composite material and carrying out a stripping test on the test sample; and calculating according to a test result to obtain a binding strength value of an aluminum-steel interface. The method is characterized in that the preparation of the test sample comprises the following steps: soldering and connecting a metal reinforced layer on the surface of an aluminum layer of the sample and forming a compound layer by the metal reinforced layer and the aluminum layer of the sample. The binding strength of the metal reinforced layer in the compound layer and the aluminum layer of the sample is greater than the binding strength of the aluminum-steel interface; in the stripping test, the compound layer and a steel layer in the sample are stripped by a tension tester.

Description

technical field [0001] The invention relates to the technical field of detection of metal layered composite materials, in particular to the field of detection of interfacial bonding fastness of metal layered composite materials, in particular to a method for detecting the interfacial bonding fastness of aluminum-steel composite materials for brazing. Background technique [0002] The brazed aluminum-steel composite material produced by "room temperature rolling and compounding" is widely used in electric power, automobile, petrochemical, construction machinery and other industries, and the typical application field is thermoelectric (thermal power, solar power, nuclear power) air cooling system. Taking the application of thermal power as an example, the air cooling system made of brazed aluminum-steel composite material replaces the cooling circulating water of the open large water tower, which can save 75% of water. Calculated by replacing 30% of domestic thermal power unit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N19/04
Inventor 唐超兰刘志木翁浩周钰波
Owner 银邦(安徽)新能源材料科技有限公司
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