Cast aluminum alloy micro-arc oxidation ceramic membrane layer and preparation method thereof

A technology of casting aluminum alloy and micro-arc oxidation, which is applied in anodic oxidation and other directions, can solve the problems of rough surface, poor surface quality of ceramic film layer, and reduce the wear resistance of surface ceramic layer, so as to achieve small roughness, smooth surface, and improved The effect of wear resistance

Active Publication Date: 2016-06-01
山东高密翔宇车桥有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the surface quality of the ceramic film layer prepared by the traditional micro-arc oxidation electrolyte is poor, and the surface is rough, which reduces the wear resistance of the surface ceramic layer.
In addition, due to the high silicon content of cast aluminum alloy, it is more difficult to form a film on its surface

Method used

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  • Cast aluminum alloy micro-arc oxidation ceramic membrane layer and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0026] Raw material preparation: 15g / L Na 2 SiO 3 ?9H 2 O, 3g / L Na 2 MnO 4 ?2H 2 O, 3g / L NaF, 8g / L NaOH, 1g / L Bi 2 o 3 , the solvent is deionized water, the sample is ZL101A cast aluminum alloy of 50mm×20mm×3mm, polished smooth by #800, #1000, #1500 sandpaper step by step, cleaned with deionized water and dried.

[0027] Material preparation: According to the above composition, Na 2 SiO 3 ?9H 2 O, Na 2 MnO 4 ?2H 2 O, NaF, NaOH and Bi 2 o 3 Add deionized water to make a bath, ultrasonically vibrate the bath for 10 minutes, then magnetically stir for 20 minutes, then add to the micro-arc oxidation electrolytic cell, and stir it.

[0028] A 20kW DC pulse micro-arc oxidation device is used to perform micro-arc oxidation on the surface of cast aluminum alloy. The sample is used as the anode and immersed in the bath liquid, and the stainless steel container with cooling system is used as the cathode. The current density is controlled at 35A / dm 2 , the constant-current...

Embodiment 2

[0030] Raw material preparation: 5g / L Na 2 SiO 3 ?9H 2 O, 8g / L Na 2 MnO 4 ?2H 2 O, 8g / L NaF, 3g / L NaOH, 3g / L Bi 2 o 3 , the solvent is deionized water, the sample is ZL101A cast aluminum alloy of 50mm×20mm×3mm, polished smooth by #800, #1000, #1500 sandpaper step by step, cleaned with deionized water and dried.

[0031] Material preparation: According to the above composition, Na 2 SiO 3 ?9H 2 O, Na 2 MnO 4 ?2H 2 O, NaF, NaOH and Bi 2 o 3 Add deionized water to make a bath, ultrasonically vibrate the bath for 15 minutes, then magnetically stir for 15 minutes, then add to the micro-arc oxidation electrolytic cell, and stir it.

[0032] A 20kW DC pulse micro-arc oxidation device is used to perform micro-arc oxidation on the surface of cast aluminum alloy. The sample is used as the anode and immersed in the bath liquid, and the stainless steel container with cooling system is used as the cathode. The current density is controlled at 35A / dm 2 , the constant-current ...

Embodiment 3

[0034] Raw material preparation: 10g / L Na 2 SiO 3 ?9H 2 O, 5g / L Na 2 MnO 4 ?2H 2 O, 7g / L NaF, 6g / L NaOH, 5g / L Bi 2 o 3 , the solvent is deionized water, the sample is ZL101A cast aluminum alloy of 50mm×20mm×3mm, polished smooth by #800, #1000, #1500 sandpaper step by step, cleaned with deionized water and dried.

[0035] Material preparation: According to the above composition, Na 2 SiO 3 ?9H 2 O, Na 2 MnO 4 ?2H 2 O, NaF, NaOH and Bi 2 o 3 Add deionized water to make a bath, ultrasonically vibrate the bath for 20 minutes, then magnetically stir for 10 minutes, then add to the micro-arc oxidation electrolytic cell, and stir it.

[0036]A 20kW DC pulse micro-arc oxidation device is used to perform micro-arc oxidation on the surface of cast aluminum alloy. The sample is used as the anode and immersed in the bath liquid, and the stainless steel container with cooling system is used as the cathode. The current density is controlled at 35A / dm 2 , the constant-current ...

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Abstract

The invention provides a cast aluminum alloy micro-arc oxidation ceramic membrane layer and a preparation method of the cast aluminum alloy micro-arc oxidation ceramic membrane layer. The adopted bath solution is an aqueous solution of Na2SiO3.9H2O, Na2MnO4.2H2O, NaF, NaOH and Bi2O3. The bath solution adopted by the cast aluminum alloy micro-arc oxidation ceramic membrane layer and the preparation method can form a membrane on the surface of cast aluminum alloy with the high silicon content more easily, and can facilitate uniform membrane formation on the surface of the cast aluminum alloy, and therefore the surface of the formed ceramic membrane layer is smooth, and the roughness is low. In addition, the added Bi2O3 in the bath solution can play a role in self-lubrication, and the wear resistance performance of the micro-arc oxidation ceramic membrane layer is improved.

Description

technical field [0001] The invention relates to a micro-arc oxidation ceramic film layer, in particular to a cast aluminum alloy micro-arc oxidation ceramic film layer. The invention also discloses a preparation method of the ceramic film layer. Background technique [0002] Due to its good castability, low density, high specific strength, and good corrosion resistance, cast aluminum alloys are more and more widely used in high-speed rail contact parts. However, its surface hardness is low and its wear resistance is poor, which greatly affects its performance. Ceramic materials have attracted extensive attention due to their excellent wear resistance and high hardness. Micro-arc oxidation technology can combine the advantages of the two materials. Micro-arc oxidation is developed on the basis of anodic oxidation. It is through the instantaneous high temperature and high pressure of arc discharge to grow a layer of protective ceramic oxide film on the surface of aluminum al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/06
Inventor 宋仁国戈云杰宋若希王超
Owner 山东高密翔宇车桥有限公司
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