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A kind of anti-erosion and wear craln-cral coating on the surface of ta15 alloy and its preparation method

An anti-erosion and alloy technology, which is applied in metal material coating process, coating, vacuum evaporation plating, etc., can solve the problems of reduced bonding force between coating and substrate, reduced coating protection ability, etc., and achieves improved bonding force , The effect of improving durability

Active Publication Date: 2021-11-30
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The occurrence of such a situation will lead to a decrease in the bonding force between the coating and the substrate, thereby reducing the coating's ability to protect the substrate material, so it is necessary to prepare a CrAlN hard coating with a CrAl intermediate layer

Method used

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  • A kind of anti-erosion and wear craln-cral coating on the surface of ta15 alloy and its preparation method
  • A kind of anti-erosion and wear craln-cral coating on the surface of ta15 alloy and its preparation method
  • A kind of anti-erosion and wear craln-cral coating on the surface of ta15 alloy and its preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The preparation method comprises the following steps:

[0035] (1) Base material pretreatment: Prepare TA15 alloy and grind it step by step on 150#, 400#, 800#, 1200#, 2000# metallographic sandpaper, using Cr 2 o 3 Polishing agent, after polishing the workpiece with flannelette to an ideal polishing surface without scratches, put it in alcohol for ultrasonic cleaning.

[0036] (2) Cleaning and placement of the workpiece: Before the sample is loaded into the furnace, the inner wall of the furnace and the surface of the target must be polished with fine sandpaper, and after removing the surface oxide film and impurities, use a dust-free cloth dipped in absolute ethanol to scrub, and CrAl is used as the sputtering target material, TA15 placed on the abutment facing the target, N 2 As a reactive gas, Ar was used as the main ionized gas.

[0037] (3) Vacuuming: Turn on the mechanical pump to pump the gas in the vacuum furnace to a pressure below 1Pa, then turn on the mole...

Embodiment 2

[0045] The preparation method comprises the following steps:

[0046] (1) Base material pretreatment: Prepare TA15 alloy and grind it step by step on 150#, 400#, 800#, 1200#, 2000# metallographic sandpaper, using Cr 2 o 3 Polishing agent, after polishing the workpiece with flannelette to an ideal polishing surface without scratches, put it in alcohol for ultrasonic cleaning.

[0047] (2) Cleaning and placement of the workpiece: Before the sample is loaded into the furnace, the inner wall of the furnace and the surface of the target must be polished with fine sandpaper, and after removing the surface oxide film and impurities, use a dust-free cloth dipped in absolute ethanol to scrub, and CrAl is used as the sputtering target material, TA15 placed on the abutment facing the target, N 2 As a reactive gas, Ar was used as the main ionized gas.

[0048] (3) Vacuuming: Turn on the mechanical pump to pump the gas in the vacuum furnace to a pressure below 1Pa, then turn on the mole...

Embodiment 3

[0054] The preparation method comprises the following steps:

[0055] (1) Base material pretreatment: Prepare TA15 alloy and grind it step by step on 150#, 400#, 800#, 1200#, 2000# metallographic sandpaper, using Cr 2 o 3 Polishing agent, after polishing the workpiece with flannelette to an ideal polishing surface without scratches, put it in alcohol for ultrasonic cleaning.

[0056] (2) Cleaning and placement of the workpiece: Before the sample is loaded into the furnace, the inner wall of the furnace and the surface of the target must be polished with fine sandpaper, and after removing the surface oxide film and impurities, use a dust-free cloth dipped in absolute ethanol to scrub, and CrAl is used as the sputtering target material, TA15 placed on the abutment facing the target, N 2 As a reactive gas, Ar was used as the main ionized gas.

[0057] (3) Vacuuming: Turn on the mechanical pump to pump the gas in the vacuum furnace to a pressure below 1Pa, then turn on the mole...

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Abstract

The invention discloses an erosion-resistant CrAlN-CrAl coating on the surface of a TA15 alloy and a preparation method thereof. The coating refers to sequentially depositing a CrAl intermediate layer and a CrAlN deposition layer on the surface of the TA15 alloy by radio frequency magnetron sputtering technology, the thickness of the CrAlN deposition layer is 3-5 μm; the thickness of the CrAl intermediate layer is 5-10 μm, Among them, the content of Cr and N in the CrAlN deposition layer decreases with the increase of the distance from the surface of the CrAlN coating, and the content of Al increases first and then decreases from the surface of the CrAlN coating to the direction of the TA15 alloy. The coating prepared by the method of the present invention has good bonding force with the alloy, and while improving the erosion and wear resistance of the substrate, the modified layer also has a good bonding ability with the substrate, preventing the coating from falling off during service, thereby It can protect the workpiece and prolong the life of the workpiece.

Description

technical field [0001] The invention belongs to the technical field of TA15 alloy surface treatment, and in particular relates to an erosion-resistant CrAlN-CrAl coating on the surface of TA15 alloy and a preparation method thereof. Background technique [0002] With the development of society and the needs of scientific progress, titanium alloy has gradually become a new type of structural material. As a structural material with excellent performance, titanium and its alloys are widely used in aviation, aerospace and other industries. It has excellent performance conditions such as low density (4.51g / cm³), high strength and high specific strength. [0003] TA15 titanium alloy is a near α-type titanium alloy. Its advantages of high fracture strength and low crack growth rate make it play a vital role in the aerospace field. However, like other titanium alloys, it has the characteristics of low hardness and poor wear resistance, which greatly limits its application in the a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C14/35C23C14/06C23C14/16
CPCC23C14/0036C23C14/0641C23C14/165C23C14/35
Inventor 缪强赵子龙梁文萍林浩亓艳马海瑞孙自旺李阳黄朝军易锦伟
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS