Detection method for interface bonding strength of aluminum-steel composite material

Abstract

The invention discloses a detection method for the interface bonding strength of an aluminum-steel composite material. The detection method comprises the following steps: cutting a rolled aluminum-steel composite sample into wafer samples, selecting or preparing two metal rods of which the diameters are the same as those of the wafer samples, and cleaning the wafer samples and the to-be-bonded surfaces of the metal rods; then, grinding the to-be-bonded surfaces; next, respectively bonding the aluminum-steel surface of each wafer sample with one end surface of one of the two metal rods by using epoxy resin AB glue, and standing for over 24 hours at normal temperature to prepare specimens; and finally, performing a peeling test on the specimens on a stretching machine and calculating the interface bonding strength of the aluminum-steel composite material. The invention provides the feasible method for the quantitative measurement on the interface bonding strength of an ultrathin metal composite material. According to the method, the specimens are prepared easily and conveniently; by adopting the method, the interface peeling fastness of the aluminum-steel composite material can be accurately detected, and the interface bonding strength of the aluminum-steel composite material for brazing can be quantitatively represented.

Description

technical field [0001] The invention mainly relates to the technical field of detecting the interfacial bonding strength of metal composite materials, in particular to the technical field of detecting the interfacial bonding strength of aluminum-steel composite materials. Background technique [0002] The emergence of composite materials is of great significance to the development of modern science and technology. The research depth and application breadth of composite materials as well as the speed and scale of production development have become one of the important symbols to measure the advanced level of a country's science and technology. The power station air cooling system made of brazed aluminum-steel composite material has significant economic and social benefits. Brazed aluminum-steel composite material is a metal layered structure composite material that is mainly developed in my country's "Twelfth Five-Year Plan". The domestic development and application of this ma...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, the detection of the interface bonding strength of aluminum-steel composite materials is generally performed by bending test or bonding test (ie, peeling test) to detect the bonding effect, but the bending test can only qualitatively detect the bonding strength of the interface of aluminum-steel composite materials , the aluminum-steel composite materials that have passed the bending may still have delamination at the aluminum-steel interface during brazing, so the effect of the bending test is not ideal

If the peeling test is adopted, the interfacial bonding strength of the aluminum-steel composite material can be quantitatively measured, but the existing peeling test needs to make a leader for stretching on the test sample, but for a large reduction rate (general cold rolling composite reduction The total thickness of the aluminum-steel composite material for power station air cooling is 1.5mm, and the thickness of the aluminum layer is relatively thin, generally less than 0.15mm. Therefore, it is impossible to make the lead part, resulting in the inability to carry out the peeling test, that is, the quantitative measurement of aluminum cannot be completed. Interfacial bonding strength of steel composites

Images