Preparation method of titanium alloy micro-arc oxide coating

A technology of micro-arc oxidation and titanium alloy, which is applied in the direction of coating, surface reaction electrolytic coating, electrolytic coating, etc., can solve the problems that affect the use of titanium alloy and the oxide film is easy to break, and achieve high surface hardness and good wear resistance High performance and bonding strength

Inactive Publication Date: 2010-12-08
JIAMUSI UNIVERSITY
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to solve the problem that the oxide film produced by the oxidation reaction of the existing high-temperature titanium alloy is easy to break when it is higher than 600 ° C, which affects the use of the titanium alloy, and provides a titanium alloy micro-arc oxidation coating. Preparation

Method used

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  • Preparation method of titanium alloy micro-arc oxide coating

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specific Embodiment approach 1

[0009] Specific Embodiment 1: The preparation method of the titanium alloy micro-arc oxidation coating in this embodiment is as follows: the titanium alloy is subjected to a bipolar pulse micro-arc oxidation power supply with a power of 5kw-6kw, a voltage of 250V-400V, and a frequency of 200Hz-400Hz , Oxidation treatment in the electrolyte solution for 5 minutes to 30 minutes under the condition of a duty ratio of 8% to 15%, to obtain a titanium alloy with a micro-arc oxidation coating thickness of 3 μm to 15 μm; wherein the electrolyte solution is composed of sodium silicate, Composed of sodium phosphate, sodium fluoride, sodium borate, glycerin and water, the concentration of sodium silicate in the electrolyte solution is 10 g / L-20 g / L, the concentration of sodium phosphate is 10 g / L-20 g / L, fluorine The concentration of sodium chloride is 2 grams / liter to 5 grams / liter, the concentration of sodium borate is 2 grams / liter to 5 grams / liter, and the concentration of glycerin is...

specific Embodiment approach 2

[0013] Specific embodiment two: the difference between this embodiment and specific embodiment one is that the electrolyte solution is composed of sodium silicate, sodium aluminate, sodium fluoride, sodium borate, glycerin and water, and the concentration of sodium silicate in the electrolyte solution is 10 g / L-20 g / L, the concentration of sodium aluminate is 10 g / L-15 g / L, the concentration of sodium fluoride is 2 g / L-5 g / L, and the concentration of sodium borate is 2 g / L liter to 5 g / liter, and the concentration of glycerin is 5 milliliters / liter to 10 milliliters / liter. Others are the same as in the first embodiment.

[0014] The bipolar pulsed micro-arc oxidation power supply used in this embodiment is a WHD10-400 type bipolar pulsed micro-arc oxidation power supply. The positive DC output current / voltage of the bipolar pulsed micro-arc oxidation power supply is up to 500A / 800V, The highest output current / voltage to DC is 500A / 300V, and the power is 5kW.

specific Embodiment approach 3

[0015] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the voltage is 280V-380V. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a preparation method of a titanium alloy micro-arc oxide coating, relating to a preparation method of an oxide coating and solving the problem that the oxide film produced by oxidation reaction when the existing high-temperature titanium alloy is in 600 DEG C is easy to fracture so as to influence the use of the alloy. The preparation method comprises the following steps: the titanium alloy is treated for 5 to 30 minutes in electrolyte solution under the conditions that the bipolar pulse micro-arc oxidation power supply has 5kw to 6kw of power, 250V to 400V of voltage,200Hz to 400Hz of frequency and 8 percent to 15 percent of duty cycle, and the micro-arc oxidation coating with the thickness of 3mum to 15mum is obtained. The micro-arc oxide coating obtained by themethod does not occur fracture after being heated at the high temperature of 800 DEG C; the micro-arc oxide coating obtained by the method has good wear resistance, thermal oxidation resistance, corrosion resistance and insulating performance and has the insulating resistance of being up to 100MOmega.

Description

technical field [0001] The invention relates to a preparation method of an oxidation coating. Background technique [0002] Titanium has a strong affinity with oxygen at higher temperatures, and can react with many elements and compounds. At high temperatures, titanium has a strong absorption of H 2 , O 2 and N 2 The oxidation behavior of titanium alloy will have obvious damage to the performance of titanium alloy. The service temperature of high-temperature titanium alloy is 600°C. When the titanium alloy is oxidized above 600°C, oxygen easily penetrates into the titanium matrix, and the formed oxide film is easy to break, which affects the use of titanium alloy at higher temperatures. Contents of the invention [0003] The technical problem to be solved by the present invention is to solve the problem that the oxide film produced by the oxidation reaction of the existing high-temperature titanium alloy is easy to break when it is higher than 600 ° C, which affects the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/26
Inventor 李俊刚吕迎马臣李国晶吴明忠
Owner JIAMUSI UNIVERSITY
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