Ni Co Cr Al Y Si B coating layer capable of resisting thermal corrosion and its preparation method

A technology of hot corrosion and coating, applied in the direction of coating, etc., to achieve the effects of low energy consumption, small corrosion weight gain, and high energy density

Inactive Publication Date: 2004-10-13
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the effects of Si and B on improving the hot corrosion resistance and high temperature oxidation of MCrAlY coatings have been recognized, there is no report on the optimal addition of Si and B.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The base material is high-pressure turbine blade material nickel-based superalloy DZ125, and the sample size is 15×15×2mm 3 , The coating composition is Ni-32Co-20Cr-8Al-0.5Y-1Si-0.03B, Ni-32Co-20Cr-8Al-0.5Y and Ni-20Co-20Cr-8Al-0.5Y. Before preparing the coating, the substrate sample was ground, cleaned and sandblasted (200 mesh glass shot, wet spray); the coating was deposited by domestic MIP-8-800 multi-arc ion plating equipment, and the sample was loaded into the furnace , the vacuum degree of the vacuum chamber was evacuated to 7×10 -3 Pa, through Ar gas, make the pressure rise to 5×10 -2 Pa, add a high bias voltage of -900V, sputter and clean the surface of the sample for about 4 minutes, then adopt the process parameters in Table 1 to deposit the coating, during the deposition process, the sample rotates with the substrate platform, and adjust the deposition time (10 ~12 hours) to obtain a coating with a thickness of 40-50 μm; heat-treat the sample after deposi...

Embodiment 2

[0027] The base material is the gas turbine blade material nickel-based superalloy DSM11, and the sample size for oxidation and corrosion experiments is 15×10×2mm 3 , the sample for the mechanical property experiment is a tensile test bar with d=5mm. The coating composition is: Ni-32Co-20Cr-8Al-0.5Y-1Si-0.03B and Ni-20Co-20Cr-8Al-0.5Y. Before preparing the coating, the size is 15×10×2mm 3Grinding, cleaning and sandblasting (200-mesh glass pellets, wet spraying) were performed on the sample, and only cleaning was done on the tensile test bar; the domestic MIP-8-800 multi-arc ion plating equipment was used to deposit the coating, and the sample After loading the furnace, evacuate the vacuum chamber to 4×10 -3 Pa, into the Ar gas, so that the pressure rose to 6 × 10 -2 Pa, add a high bias voltage of -1000V, sputtering and cleaning the surface of the sample for about 2 minutes, then adopt the process parameters in Table 2 to deposit the coating, during the deposition process, t...

Embodiment 3

[0050] The base material is the gas turbine blade material nickel-based superalloy M22, and the sample size for the oxidation test is 10×10×2mm 3 , The sample for the durability test is a tensile test bar with d=5mm. The coating composition is: Ni-32Co-20Cr-8Al-0.5Y-1Si-0.03B and Ni-32Co-20Cr-8Al-0.5Y. Before preparing the coating, for 10×10×2mm 3 Grinding, cleaning and sandblasting (200-mesh glass pellets, wet spraying) were performed on the sample, and only cleaning was done on the tensile test bar; the domestic MIP-8-800 multi-arc ion plating equipment was used to deposit the coating, and the sample After the furnace is installed, the vacuum degree of the vacuum chamber is evacuated to 2×10 -3 Pa, through Ar gas, make the pressure rise to 8×10 -2 Pa, add a high bias voltage of -800V, sputter and clean the surface of the sample for about 5 minutes, and then use the process parameters in Table 5 to deposit the coating. During the deposition process, the sample rotates with...

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Abstract

The present invention relates to coating technology, in the concrete, it discloses a NICoCrAlYSiB hot corrosion resisting high-temp. protection coating and its preparation method. Its element content composition includes: Co 28-35 wt%, Cr 17-23 wt%, Al 5-12 wt%, Y 0.1-0.6 wt%, Si 0.9-1.1 wt%, B 0.02-0.04 wt% and the rest is Ni. Said invention adopts electric arc ion deposition technique to prepare said protection coating, and as compared with existent technology said invented protection coating has highest resistance to hot corrosion and high temp. oxidative property, and its preparation process is low in cost.

Description

technical field [0001] The invention relates to protective coating technology, in particular to a NiCoCrAlYSiB thermal corrosion-resistant coating for gas turbine hot end parts and a preparation method thereof. Background technique [0002] At present, gas turbines, as the main power in the 21st century, have been widely used in aero engines, industrial generators, ship engines, vehicle engines, etc. Due to the harsh working environment of gas turbine components, especially high-temperature gas is a strong corrosive medium, and impurities in the fuel and the atmosphere often cause new corrosion mechanisms and significantly accelerate corrosion. Therefore, it is required that gas turbine blades have high-temperature mechanical properties. , but also have excellent thermal corrosion resistance and high temperature oxidation performance. The high-temperature protective coating on the surface of the gas turbine blade can protect the blade material from oxidation and corrosion. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/00
Inventor 孙超武颖娜王启民柯培玲王福会华伟刚肖金泉宫骏闻立时
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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