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Preparation method of MCrAlY high temperature protection coating

A protective coating and high temperature technology, applied in the coating, metal material coating process, ion implantation plating, etc., can solve the problems of low utilization rate, large particles of aggregated arc spot droplets, etc.

Inactive Publication Date: 2017-05-31
GUANGDONG INST OF NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the invention also provides a method to solve the problem of low utilization rate of traditional arc ion plating target materials and large particles of aggregated arc spot droplets.

Method used

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  • Preparation method of MCrAlY high temperature protection coating
  • Preparation method of MCrAlY high temperature protection coating
  • Preparation method of MCrAlY high temperature protection coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The nickel-based superalloy K423A test piece is pre-treated by wet sandblasting. The specific process parameters are: the sandblasting abrasive is white corundum, the abrasive size is 180 mesh, and the sandblasting pressure is 0.2MPa.

[0025] Table 1 NiCoCrAlYTa coating process flow chart

[0026]

[0027] The NiCoCrAlYTa alloy target is used, the working gas is 99.999% argon, the K423A test piece is suspended in the vacuum chamber hanger, and a NiCoCrAlYTa layer of about 45 μm is deposited. After coating, the surface of the coated coating on the two base materials is flat and smooth, the roughness is Ra2.07μm, the color of the coating is uniform, and the bending test results show no peeling. Anti-oxidation test results show that the average oxidation rate is 0.033g / m 2 h, the amount of scale shedding is 1.53g / m 2 , the coating meets the oxidation resistance level. Gas hot corrosion test results show that the average corrosion rate is 0.01g / m 2 , the surface sta...

Embodiment 2

[0029] The nickel-based superalloy DZ22B test piece is pre-treated by wet sandblasting. The specific process parameters: the sandblasting abrasive is white corundum, the abrasive size is 200 mesh, and the sandblasting pressure is 0.3MPa.

[0030] Table 2 NiCoCrAlYTa coating process flow chart

[0031]

[0032] NiCoCrAlYTa alloy target is used, the working gas is 99.999% argon, the DZ22B test piece is suspended in the vacuum chamber hanger, and a NiCoCrAlYTa layer of about 58 μm is deposited (see image 3 , 1 in the figure is the coating, 2 is the substrate). After coating, the surface of the coated coating on the two base materials is flat and smooth, the roughness is Ra3.02μm, the color of the coating is uniform, and the bending test results show no peeling. Static oxidation test results show that the average oxidation rate is 0.058g / m 2 h, the amount of scale shedding is 1.94g / m 2 , the coating meets the oxidation resistance level. Gas hot corrosion test results show ...

Embodiment 3

[0034] The nickel-based superalloy K403 workpiece is pre-treated by wet sandblasting. The specific process parameters: the abrasive for sandblasting is white corundum, the size of the abrasive is 100 mesh, and the blasting pressure is 0.1MPa.

[0035] Table 3 NiCrAlY coating process flow chart

[0036]

[0037] The NiCrAlY alloy target is used, the working gas is 99.999% argon, the K403 test piece is suspended in the vacuum chamber hanger, and a NiCrAlY layer of about 25 μm is deposited. After coating, the surface of the coated coating on the two substrates is flat and smooth, the roughness is Ra1.75μm, the color of the coating is uniform, and the bending test results show no peeling. Static oxidation test results show that the average oxidation rate is 0.033g / m 2 h, the scale shedding amount is 0.97g / m 2 , the coating meets the complete anti-oxidation level; the gas hot corrosion test results show that the average corrosion rate is 0.04g / m 2 , the surface state of the s...

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Abstract

The invention relates to a preparation method of a MCrAlY high temperature protection coating. The preparation method sequentially comprises the following steps that before plating, a base material is subject to surface scale removal and washing treatment; after vacuumizing is carried out to 5.0*10<-3> Pa, the in-furnace pressure intensity is 1.0 Pa to 3.0 Pa, the Ar gas flow is 200 sccm to 600 sccm, the back bias voltage is 500 V to 1000 V, the time is 30 min to 60 min, and glow discharge ion washing is carried out; and deposition of the MCrAlY coating is carried out, wherein the in-furnace pressure intensity is 0.8 Pa to 2.0 Pa, the Ar gas flow is 300 sccm to 500 sccm, the arc target current is 60 A to 120 A, according electromagnetic parameters, the voltage is 8 V to 50 V, the frequency is 1.0 Hz to 33.3 Hz, the permanent magnet parameter is 5000 Gs to 15000Gs, and the back bias voltage is 50 V to 200 V. According to the method, the protection coating which is good in film / base bonding force, compact in film layer, small in surface roughness, resistant to high temperature oxidation and excellent in heat corrosion resistance can be prepared on the high temperature alloy surface. The method can solve the problem that traditional arc ion plating target using rate is low, the aggregation state arc spot drop large particles are achieved, and the method is suitable for industrial production.

Description

technical field [0001] The invention relates to a preparation method of MCrAlY high temperature protective coating. Background technique [0002] As the heart of the aircraft power system, the aero engine reflects the overall level of a country's aviation industry and is also known as the jewel in the crown of the industry. The service environment of engine high-temperature parts (such as blades) is very harsh, which requires not only good toughness and plasticity, but also excellent high-temperature oxidation resistance and high-temperature corrosion resistance. Traditional high-temperature alloy materials are difficult to meet the conditions listed above. At present, The main solution is to coat the high temperature resistant coating on the superalloy substrate. [0003] The high-temperature protective coatings for aero-engine components have developed from the initial aluminized coating, to the modified aluminide coating, to the currently widely studied MCrAlY coating, w...

Claims

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Application Information

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IPC IPC(8): C23C14/32C23C14/16C23C14/02
CPCC23C14/022C23C14/16C23C14/325
Inventor 林松盛石倩谢世明代明江周克崧侯惠君韦春贝胡芳李洪苏一凡
Owner GUANGDONG INST OF NEW MATERIALS
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