Preparation method for magnesium aluminum composite board

A composite plate and magnesium alloy plate technology, applied in metal rolling, manufacturing tools, metal rolling, etc., can solve the problems of high environmental hazards and cumbersome operations, and achieve the effects of reducing brittleness, simple process methods, and improving bonding strength

Active Publication Date: 2014-02-19
SHENYANG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Purpose of the invention: The present invention provides a surface pretreatment method for magnesium alloy die castings, the purpose of which is to provide a more green, simple and feasible magnesium alloy die castings for the shortcomings of the prior art, such as greater environmental hazards and cumbersome operations. Surface anti-corrosion pretreatment method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1. Use 300Х200mm pure aluminum plate with a thickness of 2.0mm as the cladding plate. The surface of the aluminum plate is first degreased with acetone, and then the surface oxide film is removed with an electric sandpaper grinding wheel.

[0029] 2. Use 300Х200mm and AZ31 magnesium alloy plate with a thickness of 8mm as the substrate. The surface pretreatment method of AZ31 magnesium alloy plate is similar to the treatment method of aluminum plate. First, it is degreased with acetone, and then the surface oxide film is removed by electric sandpaper grinding wheel, and the surface is roughened at the same time.

[0030] 3. Immediately carry out arc spraying solder layer on the AZ31 magnesium alloy plate after pretreatment. The material used for arc spraying is a Zn-Al-Cu-Ag based flux-cored solder wire in which Zn-Al-Ag alloy powder is added in a 0.15mm thick pure copper tube. The diameter of the cored wire is 2.0 mm, and the nominal chemical composition is: 35% Cu, 8...

Embodiment 2

[0040] 1. Use 300Х200mm pure aluminum plate with a thickness of 2.0mm as the cladding plate. The surface of the aluminum plate is first degreased with acetone, and then the surface oxide film is removed with an electric stainless steel grinding wheel.

[0041] 2. Use 300Х200mm and AZ31 magnesium alloy plate with a thickness of 8mm as the substrate. The surface pretreatment method of AZ31 magnesium alloy plate is similar to the treatment method of aluminum plate. First, it is degreased with acetone, and then the surface oxide film is removed by electric stainless steel grinding wheel, and the surface is roughened at the same time.

[0042] 3. Immediately arc-spray the solder layer on the surface of the pre-treated AZ31 magnesium alloy plate and pure aluminum plate to be bonded. The material used for arc spraying is Zn-Sn-Cu series flux-cored solder wire made of 0.15mm thick pure copper tube filled with ZnSn alloy powder. The diameter of the drug core wire is 2.0 mm, and the n...

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Abstract

The invention discloses a preparation method for a magnesium aluminum composite board, and relates to a preprocessing method for preventing the surface of die-cast magnesium alloy from being corroded. The method is characterized by comprising the following steps: carrying out acid washing, namely dipping preprocessed magnesium alloy in an acid solution for 25-30 seconds and washing by clear water when the metal luster of the alloy is generated; phosphating, namely processing the acid-washed magnesium alloy in a mixed solution of NaOH, Na3PO4 and Na3SiO4; carrying out film forming, that is, putting the acid-washed and phosphated magnesium alloy into a Na2O2 solution for processing to form a film. The method is simple in process, lower in cost and good in anticorrosion effect, and not only can provide a good anticorrosion bottom layer for subsequent surface treatment of the die-cast magnesium alloy but also can be directly used.

Description

technical field [0001] The invention belongs to the field of material processing engineering, and in particular relates to the manufacturing technology of a magnesium-aluminum metal composite plate. Background technique [0002] Magnesium and magnesium alloys are one of the most promising green engineering metal materials today. Magnesium is not only the lightest structural metal, but compared with other metal structural materials, magnesium and magnesium alloys have high specific strength, high specific stiffness, strong damping performance and electromagnetic shielding performance, and can withstand large shock and vibration loads. Magnesium alloys are widely used in vehicles, electronic industrial products, aerospace and other fields, and are the third largest category of metal structural materials developed after steel and aluminum alloys. But for a long time, the application of magnesium alloys developed slowly. The main constraints are the poor processing deformation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C37/02B21B1/38B21B37/00B23K35/28C23C4/12C23C4/08C23C22/60C23C22/78C23C22/82C23C4/129C23C4/131
Inventor 张忠礼张楠楠李德元李子健
Owner SHENYANG POLYTECHNIC UNIV
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