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Method for preparing dense enhancement type ceramic membrane based on micro-arc oxidizing and laser remelting

A technology of laser remelting and micro-arc oxidation, which is applied in anodic oxidation, coating, surface reaction electrolytic coating, etc., can solve the problem of not having low energy consumption and high performance of the film layer at the same time, so as to reduce processing time and energy consumption, Improve hardness, anti-corrosion and wear resistance.

Inactive Publication Date: 2013-08-07
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims to solve the problem that the micro-arc oxidation surface treatment technology cannot have low energy consumption and high performance of the film layer when preparing ceramic film layers on the surface of aluminum, magnesium, titanium and other light metals and their alloys, and provides a micro-arc oxidation based on micro-arc oxidation and Preparation method of denseness-enhanced ceramic film layer remelted by laser

Method used

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  • Method for preparing dense enhancement type ceramic membrane based on micro-arc oxidizing and laser remelting
  • Method for preparing dense enhancement type ceramic membrane based on micro-arc oxidizing and laser remelting
  • Method for preparing dense enhancement type ceramic membrane based on micro-arc oxidizing and laser remelting

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specific Embodiment approach 1

[0017] Specific implementation mode one: combine Figure 1 ~ Figure 4 In this embodiment, a method for preparing a denseness-enhanced ceramic film layer based on micro-arc oxidation and laser remelting is carried out according to the following steps:

[0018] 1. Pretreatment of matrix material: choose 300 # Sandpaper ~ 2000 # Use two or more types of sandpaper in the sandpaper to grind the base material step by step, then wash the ground base material with water for 3-5 minutes, and then wash it with NaOH solution with a concentration of 20g / L-100g / L for 5min- After 10 minutes, put the base material after alkali washing into acetone or absolute ethanol, clean it with ultrasonic waves with a frequency of 24KHz-40KHz for 1min-3min, and finally wash it in deionized water for 2min-5min, then air-dry or air-dry to obtain pretreatment After the base material;

[0019] 2. Preparation of working solution: Add the main film-forming agent, pH regulator, stabilizer, colorant and color...

specific Embodiment approach 2

[0038] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the base material in step 1 is magnesium, aluminum, titanium, magnesium alloy, aluminum alloy or titanium alloy. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0039] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the main film-forming agent Na described in step two 2 SiO 3 , NaAlO 2 、Na 3 PO 4 and (NaPO 3 ) 6 One or a mixture of several of them; the pH regulator described in step two is KOH or NaOH; the stabilizer described in step two is KF or NaF; the colorant described in step two is tungstic acid Sodium, ammonium metavanadate, copper sulfate or H 3 BO 3 ; The coloring leveling agent described in step 2 is ethylenediaminetetraacetic acid disodium (ETDA-2Na). Others are the same as in the first or second embodiment.

[0040] When the main film-forming agent described in this embodiment is a mixture, the components are mixed in any proportion.

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Abstract

The invention discloses a method for preparing a dense enhancement type ceramic membrane based on micro-arc oxidizing and laser remelting, and relates to a method for preparing a dense enhancement type ceramic membrane on the surfaces of light metals such as magnesium, aluminium and titanium and other alloys. The method is used for solving the problems that a micro-arc oxidizing surface treatment technology for preparing the dense enhancement type ceramic membrane on the surfaces of light metals such as magnesium, aluminium and titanium and other alloys cannot have low energy consumption and high membrane performance at the same time. The method comprises steps of: 1, pretreatment of basic materials; 2, working liquid preparation treatment; 3, micro-arc oxidation; and 4, laser remelting treatment of the micro-arc oxidation (MAO) membrane, and thus obtaining a sample piece of the dense enhancement type ceramic membrane. The prepared membrane has good binding force with a base body, dense tissues, low porosity, high hardness and good corrosion resistance and wear resistance; and the porosity of the membrane can be reduced to below 3%, the harness number can be improved by double times of the original MAO membrane which is not subjected to laser remelting treatment. The method can be used for preparing the dense enhancement type ceramic membrane on the surfaces of light metals such as magnesium, aluminium and titanium and other alloys.

Description

technical field [0001] The invention relates to a method for preparing denseness-enhanced ceramic film layers on the surface of light metals such as magnesium, aluminum, titanium and their alloys. Background technique [0002] The ceramic film layer prepared on the surface of light metals such as aluminum, magnesium, titanium and their alloys by micro-arc oxidation surface treatment technology has good bonding force with the substrate, greatly improves the surface hardness, and can improve the wear resistance, corrosion resistance, insulation and corrosion resistance of the substrate. Thermal insulation performance, and the working fluid is environmentally friendly, and the reaction is carried out at normal temperature and pressure. Therefore, this technology has a good application prospect. At present, the main obstacle restricting the application of micro-arc oxidation technology is the high energy consumption of the process, especially in the preparation of films with hig...

Claims

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Application Information

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IPC IPC(8): C25D11/02C25D11/18C25D11/30C25D11/26
Inventor 狄士春喻杰
Owner HARBIN INST OF TECH
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