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A method for preparing ceramic film/glaze film composite coating on titanium alloy surface

A technology of ceramic coating and titanium alloy, which is applied in the direction of metal material coating process, coating, superimposed layer plating, etc., to achieve the effects of good film-base bonding force, simple operation, and improved wear resistance and corrosion resistance

Active Publication Date: 2018-04-27
ZHEJIANG UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the defects of the existing titanium alloy surface coating technology, and provide a method for preparing a coating that improves the performance of the titanium alloy surface coating

Method used

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  • A method for preparing ceramic film/glaze film composite coating on titanium alloy surface
  • A method for preparing ceramic film/glaze film composite coating on titanium alloy surface
  • A method for preparing ceramic film/glaze film composite coating on titanium alloy surface

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Embodiment 1

[0028] 1. Pretreatment of titanium alloy samples

[0029] The titanium alloy TC4 sample is processed into such as figure 1 As shown, the thickness is 20mm. Grind the processed samples with 180#, 400#, 600#, 800#, 1200#, 1500#, 2000# sandpaper until the surface is smooth. Then use a polishing machine, a polishing cloth and a 1 μm alumina polishing paste to polish the titanium alloy sample to a mirror surface appearance of Ra≈0.3 μm.

[0030] 2. Preparation of micro-arc oxidation coating

[0031] Rinse the polished titanium alloy samples with clean water respectively, and then place the samples in an acetone solution for ultrasonic cleaning for 10 minutes to remove oil. The cleaning frequency is 100,000HZ. Rinse with deionized water after ultrasonic cleaning, take out and blow dry. Then install the sample in the micro-arc oxidation equipment (such as figure 2 As shown), the electrolyte composition and micro-arc oxidation parameters are shown in Table 1.

[0032] Table 1: ...

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Abstract

The invention relates to a method for preparing a ceramic film / glaze film composite coating on a titanium alloy surface. First, a ceramic coating is prepared on the surface of a matrix by a micro-arc oxidation technology on a titanium alloy; and then, the ceramic surface is subjected to glazing and hole sealing, and is sintered to prepare the composite coating. The method combines the micro-arc oxidation (MAO) technology with the surface glazing technology to prepare the ceramic film / glaze film composite coating to improve the surface hardness, wear resistance and high-temperature heat stability of the matrix, and the coating has good film base binding force; and as the ceramic and the glaze layer are high in hardness and density, the wear resistance and the corrosion resistance of the titanium alloy are improved. The method is green and environment-friendly, low in equipment requirements, simple in operation and low in cost.

Description

(1) Technical field [0001] The invention relates to a method for preparing a ceramic film / glaze film composite coating on the surface of a titanium alloy. (2) Background technology [0002] Titanium and its alloys have the characteristics of low relative density, the highest specific strength among metals, and the elastic modulus is about half that of steel. Moreover, titanium can be used for a long time at a temperature of 600°C or even higher. At the same time, it has low temperature resistance. It can maintain good ductility and toughness in a low temperature environment of minus 196-253°C, thereby avoiding the cold brittleness of the metal. In addition, titanium also has the advantages of non-magnetic, non-toxic, and no pollution to the environment. Therefore, titanium and its alloys are widely used in the fields of aerospace, shipbuilding, chemical industry, medical equipment and implant materials, and are known as "space metals" and "ocean metals". [0003] Principle...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/26C23C28/04C23D3/00C23D5/02C03C8/12
CPCC03C8/12C23C28/042C23D3/00C23D5/02C25D11/26
Inventor 金杰
Owner ZHEJIANG UNIV OF TECH
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