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Method for improving oxidation resistance of titanium and titanium alloy by means of Si-containing compound

A technology of anti-oxidation performance and titanium alloy, which is applied in metal material coating process, pressure inorganic powder coating, electrolytic inorganic material coating, etc. The oxidation effect of the coating has not been explained, and the effect of improving the anti-oxidation performance, preventing oxygen intrusion, and simple preparation method is achieved.

Active Publication Date: 2020-02-28
UNIV OF SCI & TECH BEIJING
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0006] Patent 3 uses micro-arc oxidation technology to prepare a high wear-resistant composite ceramic coating. The coating material is mainly made of TiO 2 -Al 2 o 3 and dispersion-enhanced phase Cr 2 o 3 -SiC composition, the prepared coating material has high hardness and good wear resistance, but there is no description on the oxidation resistance of the coating, and it cannot be confirmed that the coating has a significant anti-oxidation effect
[0007] Patent 4 uses laser cladding technology to prepare a wear-resistant ceramic composite coating. The cladding powder is composed of any one of Ti, Al, Si and SiC, TiC, and BC. The wear resistance of the coating is good, but the coating The oxidation effect of the coating has not been explained, and it cannot be confirmed that the coating has a significant anti-oxidation effect

Method used

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  • Method for improving oxidation resistance of titanium and titanium alloy by means of Si-containing compound
  • Method for improving oxidation resistance of titanium and titanium alloy by means of Si-containing compound
  • Method for improving oxidation resistance of titanium and titanium alloy by means of Si-containing compound

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Experimental program
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Effect test

Embodiment 1

[0029] Embodiment 1: mechanical press-in method

[0030] The multi-level silicide particles are pressed into the surface of industrial pure titanium or titanium alloy by means of pressure equipment with ultrasonic vibration.

[0031] The specific process steps are as follows:

[0032](1) Use the mechanical ball milling method to make the multi-level silicide into micron-sized and nano-sized particles respectively, fully mix the multi-level silicide and an appropriate amount of alcohol, and then add them to the spherical tank of the planetary system ball mill, and then rotate at a speed of 200r Run at / min-350r / min for 12h-24h. The particle size range of the micron-scale particles is 1 μm to 50 μm, and the particle size range of the nano-scale particles is 20 nm to 800 nm. Mixing micron-sized particles and nano-sized particles into a nano-micron multilevel silicide, wherein the volume ratio of the micron-sized particles is 10% to 90%. The selected silicide contains SiC with ...

Embodiment 2

[0040] Example 2: Press-in-Laser Fusion

[0041] The multi-level silicide particles are welded into the surface of industrial pure titanium or titanium alloy with the help of high energy density of laser. The specific process steps are as follows:

[0042] (1) Use the mechanical ball milling method to make the multi-level silicide into micron-sized and nano-sized particles respectively, fully mix the multi-level silicide and an appropriate amount of alcohol, and then add them to the spherical tank of the planetary system ball mill, and then rotate at a speed of 230r Run at / min-300r / min for 16h-24h. The particle size range of the micron-scale particles is 10 μm to 35 μm, and the particle size range of the nano-scale particles is 50 nm to 500 nm. The micron-sized particles and nano-sized particles are mixed into a nano-micron multilevel silicide, wherein the volume ratio of the micron-sized particles is 15% to 90%. The selected silicide contains Si with a mass fraction of 30...

Embodiment 3

[0051] Embodiment 3: brush plating

[0052] The multilevel silicide particles are plated on the surface of industrial pure titanium or titanium alloy by means of an external electric field. The specific process steps are as follows:

[0053] (1) The multi-level silicide is made into micron-sized and nano-sized particles by mechanical ball milling, and the multi-level silicide is fully mixed with an appropriate amount of alcohol and then added to the spherical tank of the planetary system ball mill, and then rotated at 260r Run at / min-330r / min for 14h-20h. The particle size range of the micron-scale particles is 5 μm to 50 μm, and the particle size range of the nano-scale particles is 80 nm to 800 nm. The micron-sized particles and the nano-sized particles are mixed into a nano-micron multilevel silicide, wherein the volume ratio of the micron-sized particles is 15% to 80%. The selected silicide contains CaSi with a mass fraction of 30%-70% 2 , 3%-28% BaO 3 Si, 5%-37% Ca ...

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Abstract

The invention discloses a method for improving oxidation resistance of titanium and titanium alloy by means of a Si-containing compound, and belongs to the field of titanium alloy materials. Through asimple and efficient technique, multistage silicide is compounded on the surface of a titanium material, wherein at least one of the multistage silicide SiC, Si3W5, Si2W, Ti5Si3, Al4SiC4, MoSi2, NbSi2, NbSi2, Si3N4, BaO3Si, Ca2O4Si, CrSi2, FeSi2 and CaSi2 is compounded on the surface of the titanium material with the assistance of a mechanical pressing method, a pressing-laser fusion method and abrushing electroplating method to form a compact oxidation layer mixed by nano-sized SiO2 and nano-sized / micro-sized TiO2. In this way, the high temperature oxidation resistance of the titanium material is significantly improved, and when the titanium material is subjected to heat preservation for 100 hours in air at 650-850 DEG C, the oxidation rate of the titanium and titanium alloy does not exceed 12.6-59.5% of that of commercial pure titanium or titanium alloy without any treatment.

Description

technical field [0001] The invention belongs to the technical field of titanium alloy materials, and in particular relates to a surface treatment method for improving the oxidation resistance of titanium and titanium alloys. [0002] technical background [0003] Titanium and titanium alloys have become one of the most important metal structural materials in the fields of aerospace and marine engineering due to their high specific strength and strong seawater corrosion resistance. However, due to titanium's high chemical activity, fast high-temperature oxidation rate, and insufficient high-temperature oxidation resistance, the use temperature of titanium and titanium alloys is usually limited to below 600 °C. The high temperature causes the surface of titanium and titanium alloys to continuously form an oxide layer that is easy to crack and peel off, resulting in material loss and increased surface defects, which severely limits the application of titanium and titanium alloys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/06C23C24/10C25D5/06C25D9/08
CPCC23C24/06C23C24/10C25D5/06C25D9/08
Inventor 石章智李猛许俊益刘雪峰
Owner UNIV OF SCI & TECH BEIJING
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