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A kind of titanium alloy blade protective coating and preparation method thereof

A protective coating, titanium alloy technology, applied in metal material coating process, coating, vacuum evaporation coating and other directions, can solve the problems of easy corrosion on the surface of titanium alloy gas turbine blades, short service life, etc., to achieve coating compactness Excellent, improved high temperature oxidation resistance, good process repeatability

Active Publication Date: 2022-07-01
NO 59 RES INST OF CHINA ORDNANCE IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the performance of the MCrAlY+AlSiY composite coating is improved compared with that of the conventional MCrAlY coating, the surface of titanium alloy gas turbine blades in marine service environments still has the problems of easy corrosion and short service life.

Method used

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  • A kind of titanium alloy blade protective coating and preparation method thereof
  • A kind of titanium alloy blade protective coating and preparation method thereof
  • A kind of titanium alloy blade protective coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The base material is titanium alloy (grade Ti6Al4V), the size of the sample is 20mm×10mm×10mm, and the size of the coating surface is 15mm×15mm. The MCrAlY / AlSiY composite coating is deposited on the substrate by arc ion plating (AIP). The composition of the MCrAlY target is (mass percentage): Co: 26, Cr: 22, Al: 12, Y: 0.5, Ni: remainder; The AlSiY target composition (mass percentage) is Al: 88.5, Si: 11, Y: 0.9.

[0025] A specific preparation method of a titanium alloy blade protective coating:

[0026] Step 1, sandblasting the substrate before deposition, and then performing ultrasonic cleaning and drying for later use;

[0027] Step 2, using domestic arc ion plating equipment to deposit MCrAlY / AlSiY composite coating, the vacuum degree in the vacuum chamber reaches 4.8×10 -3 At Pa, argon gas is introduced into the vacuum chamber, the air pressure is controlled at 1.7Pa, the negative pulse voltage is applied to the substrate at -160V, and the pulse duty ratio is 6...

Embodiment 2

[0035] The composition of the base material and the process parameters refer to the examples. The difference from Example 1 lies in the preparation method. The specific preparation method in this example is as follows:

[0036] Step 1, sandblasting the substrate before deposition, and then performing ultrasonic cleaning and drying for later use;

[0037] Step 2, using domestic arc ion plating equipment to deposit MCrAlY / AlSiY composite coating, the vacuum degree in the vacuum chamber reaches 4.8×10 -3At Pa, argon gas is introduced into the vacuum chamber, the air pressure is controlled at 1.7Pa, the negative pulse voltage is applied to the substrate at -160V, and the pulse duty ratio is 65%. The gas glow discharge is enhanced by the arc to glow the surface of the substrate. Discharge ion cleaning for 60 minutes;

[0038] Step 3, adjust the Ar gas flow, control the air pressure in the vacuum chamber at 1.3Pa, add pulse negative bias to the substrate at -120V, the pulse duty cy...

Embodiment 3

[0043] The composition of the base material and the process parameters refer to the examples. The difference from Example 1 lies in the preparation method. The specific preparation method in this example is as follows:

[0044] Step 1, sandblasting the substrate before deposition, and then performing ultrasonic cleaning and drying for later use;

[0045] Step 2, using domestic arc ion plating equipment to deposit MCrAlY / AlSiY composite coating, the vacuum degree in the vacuum chamber reaches 4.8×10 -3 At Pa, argon gas is introduced into the vacuum chamber, the air pressure is controlled at 1.7Pa, the negative pulse voltage is applied to the substrate at -160V, and the pulse duty ratio is 65%. The gas glow discharge is enhanced by the arc to glow the surface of the substrate. Discharge ion cleaning for 60 minutes;

[0046] Step 3, adjust the Ar gas flow, control the air pressure in the vacuum chamber at 1.3Pa, add pulse negative bias to the substrate at -120V, the pulse duty c...

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Abstract

The invention provides a titanium alloy blade protective coating and a preparation method thereof. The MCrAlY+AlSiY composite coating arranged on a titanium alloy substrate is adopted. The MCrAlY layer is deposited on the surface of the titanium alloy substrate by an arc ion plating process, and the AlSiY layer is ionized by The assisted arc ion plating process is deposited on the MCrAlY layer. By adopting the scheme of the present invention, the obtained protective coating has high bonding strength with the titanium alloy blade substrate, the surface of the protective coating and its interior have no large particle size and number, no micropores, and the coating has excellent compactness, which can not only improve the titanium alloy The high temperature oxidation resistance and thermal corrosion resistance of the alloy blade protective coating are especially suitable for high temperature protection in hot and humid salt spray environment (such as marine service environment), and can effectively prolong the service life of the titanium alloy blade protective coating.

Description

technical field [0001] The invention relates to the technical field of marine equipment surface engineering, in particular to a titanium alloy blade protective coating suitable for marine service environment and a preparation method thereof. Background technique [0002] In recent years, with the in-depth expansion of my country's overseas interests and the continuous advancement of the plan to build a maritime power, the construction of our navy's equipment and strength has entered an unprecedented period of development, and various new types of ships have been installed in the troops and began to serve. Due to the advantages of small size, light weight, high energy conversion efficiency and good dynamic stability, gas turbines have gradually begun to replace traditional steam and diesel power plants and have been widely used in large surface ships. Titanium alloy has the advantages of high strength, low density, high toughness and good corrosion resistance, and is one of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C14/32C23C14/16C23C14/58
Inventor 吴护林解志文向林高旭公平宁海青陈永君郭锋苏艳高诗情邢志辉刘鹏
Owner NO 59 RES INST OF CHINA ORDNANCE IND
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