Method of Adding Zirconium Carbonate to Electrolyte to Improve Wear Resistance of Micro-arc Oxidation Film on Near-α Titanium Alloy

A micro-arc oxidation, zirconium carbonate technology, applied in electrolytic coatings, surface reaction electrolytic coatings, coatings, etc., can solve the problems of complex equipment, poor coating effect, easy damage, etc. Effects of reduced roughness and increased growth rate

Active Publication Date: 2021-06-08
INNER MONGOLIA UNIV OF TECH
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Problems solved by technology

But at the same time, these technologies have more or less problems, or require inert gas protection in a vacuum environment, or the equipment is complex and easily damaged, or the coating effect is not good.

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  • Method of Adding Zirconium Carbonate to Electrolyte to Improve Wear Resistance of Micro-arc Oxidation Film on Near-α Titanium Alloy
  • Method of Adding Zirconium Carbonate to Electrolyte to Improve Wear Resistance of Micro-arc Oxidation Film on Near-α Titanium Alloy
  • Method of Adding Zirconium Carbonate to Electrolyte to Improve Wear Resistance of Micro-arc Oxidation Film on Near-α Titanium Alloy

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Embodiment Construction

[0057] The first part, the addition of zirconium carbonate to the electrolyte to prepare the micro-arc oxidation film of near-alpha titanium alloy

[0058] 1. Preparation of near-alpha titanium alloy

[0059] The substrate sample was selected as Ti-5Al-1V-1Sn-4Zr-0.8Mo alloy (preliminary research results showed that the film layer adhesion and wear resistance obtained after micro-arc oxidation of this alloy were better), and the preparation method was vacuum automatic Vacuum consumable melting is carried out in a consumable arc melting furnace (VAR). Inductively coupled plasma atomic emission spectrometry was used to detect and analyze the actual composition of the ingot prepared by smelting. The actual composition is shown in Table 1. From the test results, the measured value of the chemical composition of the ingot is close to the nominal composition of the alloy, which meets the experimental requirements.

[0060] Table 2-1 Chemical Composition of Alloys (wt.%)

[0061] ...

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Abstract

The invention discloses a method for adding zirconium carbonate to an electrolyte to improve the wear resistance of a near-alpha titanium alloy micro-arc oxidation film, comprising the following steps: (1) pretreatment of a near-alpha titanium alloy sample; (2) preparation of a micro-arc oxidation electrolyte ; (3) Micro-arc oxidation treatment. Zirconium carbonate is added to the electrolyte, and zirconium carbonate is gradually decomposed under the action of high temperature and high pressure of micro-arc oxidation to produce H 2 O.CO 2 and ZrO 2 , CO 2 The creation of more small discharge holes while the gas overflows helps the excess heat generated by the micro-arc oxidation to dissipate, and the growth rate of the micro-arc oxidation film layer increases; ZrO 2 It can enter the film layer by means of adsorption and engagement to fill the discharge holes and cracks, and disperse and distribute in the discharge holes and surface depressions to form effective filling, so that the diameter of the discharge holes is reduced, the roughness of the film layer is reduced, and the compactness is improved.

Description

technical field [0001] The invention relates to the technical field of titanium alloy micro-arc oxidation film. Specifically, it is a method of adding zirconium carbonate to the electrolyte to improve the wear resistance of the micro-arc oxidation film of near-alpha titanium alloy. Background technique [0002] Titanium alloys can be classified in many ways. From the perspective of metastable state phase composition of titanium alloys, they can be divided into five types: α type, near α type, α+β type, metastable β type and β type. Near α-type titanium alloy has excellent corrosion resistance and creep resistance, excellent weldability, formability, oxidation resistance, good thermal stability, and the service temperature can reach 600 ° C. It is often used in aerospace, military fields and ships. However, due to the inherent characteristics of titanium alloy itself, its wear resistance is poor, especially sensitive to adhesive wear and fretting wear. At the same time, it ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/26C22C14/00
CPCC22C14/00C25D11/026C25D11/26
Inventor 吕凯闫鹏宇丰志城张瑞芳车广东曹飞
Owner INNER MONGOLIA UNIV OF TECH
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