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Brazing technique for 6061 aluminum alloy and AZ31B magnesium alloy

A brazing process, magnesium alloy technology, applied in metal processing equipment, manufacturing tools, welding equipment, etc., can solve the problem of easy corrosion of magnesium alloys, and achieve the effect of easy cutting, uniform wall thickness, and expanding application fields

Active Publication Date: 2015-03-25
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, magnesium alloys are prone to corrosion, so far, the research on dissimilar metal magnesium alloys and aluminum alloys using fluxes has not been reported.

Method used

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  • Brazing technique for 6061 aluminum alloy and AZ31B magnesium alloy
  • Brazing technique for 6061 aluminum alloy and AZ31B magnesium alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0026] Embodiment: The aluminum alloy used in this example is 6061 forged aluminum alloy, and the magnesium alloy is ZA31B magnesium alloy for the test.

[0027] a. For 6061 aluminum alloy containing chemical mass percentage Mg (0.8% ~ 1.2%), Mn 0.2%, Si<0.1%, Fe<0.03%, Cu<0.1%, Ni<0.005% , Ca < 0.04%, other elements < 0.3%, and the rest is Mg. The brazing filler metal is sheet-shaped Zn-12Cd brazing filler metal, and the chemical mass percentage of the brazing filler metal is Cd (10% to 12%), Ag (5.2% to 6.4%), Cu (1% to 2.4%), the rest is Zn, check whether the content of the raw material quality certificate is correct, then check the appearance quality of the raw material, and finally re-inspect the chemical composition and mechanical properties.

[0028] b. Use sandpaper to strictly grind off the oxide skin on the surface of 6061 aluminum alloy, AZ31B magnesium alloy and flaky solder Zn-12Cd to improve the quality of welding;

[0029] c. Rinse off the debris on the surface...

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PUM

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Abstract

The invention relates to a brazing technique for 6061 aluminum alloy and AZ31B magnesium alloy and belongs to the brazing techniques of aluminum and magnesium alloy. The brazing technique comprises the steps that aluminum alloy passing raw material inspection, magnesium alloy passing raw material inspection and Zn-12Cd flake brazing filler metal passing raw material inspection are prepared, an oxidation layer on the surface of the 6061 aluminum alloy, an oxidation layer on the surface of the AZ31B magnesium alloy and an oxidation layer on the surface of the brazing filler metal are removed through abrasive paper, then the two faces of the brazing filler metal, the face, sanded by the abrasive paper, of the aluminum alloy and the surface, sanded by the abrasive payer, of the magnesium alloy are cleaned with alcohol, the brazing filler metal is arranged between the aluminum alloy and the magnesium alloy, the brazing filler metal, the aluminum alloy and the magnesium alloy are fixed through a clamp and put in a KTF series pipe type vacuum atmosphere resistance furnace, the heating speed is set as 6 DEG C-10 DEG C / min, heating is conducted until the temperature reaches 310 DEG C-335 DEG C, then the heating speed is set as 2 DEG C-8 DEG C / min, heating is conducted until the temperature reaches 365 DEG C-390 DEG C, heat preservation is conducted for 40 min-70 min, the temperature is reduced to 260 degrees, heat preservation is conducted for 30 min, and the razing filler metal, the aluminum alloy and the magnesium alloy are cooled to the room temperature along with the furnace, and a brazed part is obtained. The brazing technique for the 6061 aluminum alloy and the AZ31B magnesium alloy is low in operation cost and easy to achieve, the obtained brazed connector is excellent in performance, and the application field of the magnetism alloy and the aluminum alloy is enlarged.

Description

technical field [0001] The invention relates to a brazing process of aluminum and magnesium alloys, in particular to a brazing process of 6061 aluminum alloy and AZ31B magnesium alloy. Background technique [0002] With the development of industrial technology, the performance requirements of automobiles and aircraft are getting higher and higher. Reducing structural weight has become an important measure to improve performance. Magnesium alloys and aluminum alloys have the advantages of low density, high specific strength, and high specific rigidity. aircraft, automobiles, ships and other structures. However, due to the wide application and intersectionality of magnesium alloys and aluminum alloys, as well as the requirements for their special properties in some occasions, it is very necessary to connect magnesium, aluminum and their alloys to form a composite structure, which can reduce the structural weight. It can also save materials. In particular, aluminum alloys hav...

Claims

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Application Information

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IPC IPC(8): B23K1/008B23K1/19B23K1/20B23K103/18
CPCB23K1/0004B23K1/008B23K1/19B23K1/206B23K2103/18
Inventor 隋艳伟武继强张宇吕扬罗海波孙智
Owner CHINA UNIV OF MINING & TECH
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