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Preparing method for aluminum alloy surface Al2O3-AlB12 composite ceramic film layer based on sodium tetraborate

An al2o3-alb12, composite ceramic membrane technology, applied in anodizing and other directions, can solve the problems of complex preparation process of composite ceramic membrane, poor matrix bonding force, long time, etc., to shorten the processing time, improve mechanical properties, bending resistance, etc. Strength-enhancing effect

Inactive Publication Date: 2018-09-07
DALIAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention aims to improve the flexural strength and fracture toughness of the micro-arc oxidation ceramic film layer on the surface of 6061 aluminum alloy, and simultaneously solve the problem of existing Al 2 o 3 -AlB 12 The preparation process of the composite ceramic film is complex, time-consuming, high energy consumption, and poor bonding with the substrate, and a 6061 aluminum alloy surface Al based on sodium tetraborate is provided. 2 o 3 -AlB 12 Preparation method of composite ceramic film layer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A 6061 aluminum alloy surface Al based on sodium tetraborate 2 o 3 -AlB 12 The preparation method of composite ceramic film layer is carried out according to the following steps:

[0019] The 6061 aluminum alloy workpiece is used as the anode, and the stainless steel plate of the electrolytic cell is used as the cathode. The anode is immersed in the working solution, and then a bipolar pulse power supply is applied between the cathode and the anode, and the initial value of the forward voltage is 50V. The final value of forward voltage is 540V, the initial value of reverse voltage is 20V, the final value of reverse voltage is 80V, and the current density is 10A / dm 2 , the frequency is 2000Hz, and the working fluid temperature is 30℃~65℃, and the processing time is 30min, that is, the surface Al of 6061 aluminum alloy is obtained. 2 o 3 -AlB 12 Composite ceramic film layer.

[0020] The size of the 6061 aluminum alloy workpiece is 50mm×100mm×2mm.

[0021]The worki...

Embodiment 2

[0025] A 6061 aluminum alloy surface Al based on sodium tetraborate 2 o 3 -AlB 12 The preparation method of composite ceramic film layer is carried out according to the following steps:

[0026] The 6061 aluminum alloy workpiece is used as the anode, and the stainless steel plate of the electrolytic cell is used as the cathode. The anode is immersed in the working solution, and then a bipolar pulse power supply is applied between the cathode and the anode, and the initial value of the forward voltage is 50V. The final value of forward voltage is 580V, the initial value of reverse voltage is 20V, the final value of reverse voltage is 85V, and the current density is 15A / dm 2 , the frequency is 1200Hz, and the working fluid temperature is 20°C-65°C, the processing time is 40min, that is, the surface Al of 6061 aluminum alloy is obtained 2 o 3 -AlB 12 Composite ceramic film layer.

[0027] The size of the 6061 aluminum alloy workpiece is 35mm×70mm×1mm.

[0028] The working ...

Embodiment 3

[0032] A 6061 aluminum alloy surface Al based on sodium tetraborate 2 o 3 -AlB 12 The preparation method of composite ceramic film layer is carried out according to the following steps:

[0033] The 6061 aluminum alloy workpiece is used as the anode, and the stainless steel plate of the electrolytic cell is used as the cathode. The anode is immersed in the working solution, and then a bipolar pulse power supply is applied between the cathode and the anode, and the initial value of the forward voltage is 50V. The final value of forward voltage is 600V, the initial value of reverse voltage is 20V, the final value of reverse voltage is 86V, and the current density is 16A / dm 2 , the frequency is 800Hz, and the working fluid temperature is 35°C-80°C, the processing time is 50min, that is, the surface Al of 6061 aluminum alloy is obtained 2 o 3 -AlB 12 Composite ceramic film layer.

[0034] The size of the 6061 aluminum alloy workpiece is 40mm×60mm×1mm.

[0035] The working l...

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Abstract

The invention discloses a preparing method for an aluminum alloy surface Al2O3-AlB12 composite ceramic film layer based on sodium tetraborate. A 6061 aluminum alloy workpiece serves as an anode, a stainless steel plate of an electrolytic cell serves as a cathode, the workpiece anode is immersed in working fluid, then, the bipolar pulse current is applied between the cathode and the anode, micro-arc oxidation treatment is conducted, the sodium tetraborate in the working fluid and aluminum in a 6061 aluminum alloy base body are subjected to the plasma chemical reaction, and accordingly the 6061aluminum alloy surface Al2O3-AlB12 composite ceramic film layer is obtained. The preparing method solves the problems that the existing Al2O3-AlB12 composite ceramic film layer preparing process is complex, time is long, and energy consumption is high. Meanwhile, the bending strength and the breaking tenacity of the 6061 aluminum alloy surface micro-arc oxidation ceramic film layer are improved.

Description

technical field [0001] The invention relates to the field of metal surface modification, in particular to a ceramic film layer on the surface of an aluminum alloy and a preparation method thereof. Background technique [0002] Due to its magnesium and silicon content, the 6061 alloy has excellent processing performance, excellent extrusion formability, excellent welding characteristics and electroplating properties, good corrosion resistance, high toughness and no deformation after processing, and the material is compact and non-deformable. Defects and easy polishing, easy color film, excellent oxidation effect and other excellent features. Widely used in various industries such as decoration, packaging, construction, transportation, electronics, aviation, aerospace, weapons, etc. In the machinery industry, it is often used for automatic mechanical parts, precision machining, mold manufacturing, etc. These uses require its surface to be resistant to damage Therefore, it is ...

Claims

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Application Information

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IPC IPC(8): C25D11/06C22C21/08
CPCC25D11/026C22C21/08C25D11/024C25D11/06
Inventor 吕鹏翔吴蒙华
Owner DALIAN UNIVERSITY