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Superhard strong toughness and high-entropy alloy nitride nano-composite coating carbide blade and preparation method thereof

A technology of cemented carbide blades and high-entropy alloys, which is applied in the direction of metal material coating technology, coating, vacuum evaporation coating, etc., can solve the problems that affect the processing performance of coated tools and the decrease of coating hardness, and achieve the goal of overcoming layers. Effects of inner grain coarsening, reduced coating stress, and high toughness

Active Publication Date: 2018-10-12
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional nitride nano-multilayer films cause residual stress release due to the interlayer diffusion and intralayer diffusion of nanolayers at high temperatures, which eventually leads to the disappearance of the hardness enhancement effect, resulting in a significant drop in coating hardness, which affects the processing performance of coated tools

Method used

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  • Superhard strong toughness and high-entropy alloy nitride nano-composite coating carbide blade and preparation method thereof
  • Superhard strong toughness and high-entropy alloy nitride nano-composite coating carbide blade and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A super-hard, tough, high-entropy alloy nitride-coated cemented carbide blade, the schematic diagram of which is shown in figure 2 , the specific preparation steps are as follows:

[0042] 1) use figure 1 Described coating device, in 400 ℃, in argon and hydrogen environment (Ar and H 2 The volume ratio is 2:1), and the cemented carbide blade is plasma etched 0.1 micron (20min);

[0043] 2) Then turn on the Cr target, under the condition of 0.01Pa, -1000V, use the arc ion plating technology to deposit a transition metal Cr bonding layer with a thickness of 5 nanometers; layer; then open the TiVZrNbHf target, at 0.5Pa (nitrogen atmosphere), deposit 500 nanometers of alternately grown CrN / TiVZrNbHfN support layers under 150V conditions (the thickness of single-layer CrN is 5 nanometers, the thickness of single-layer TiVZrNbHfN is 5 nanometers, and the modulation period is 10 Nano), during the deposition process, the workpiece is rotated in the equipment, TiVZrNbHfN is ...

Embodiment 2

[0047] A super-hard, tough, high-entropy alloy nitride-coated cemented carbide blade, the schematic diagram of which is shown in figure 2 , the specific preparation steps are as follows:

[0048] 1) use figure 1 Described coating device, in 600 ℃, in argon and hydrogen environment (Ar and H 2 The volume ratio is 2:1), and the cemented carbide blade is plasma etched 0.2 microns (40min);

[0049] 2) Then turn on the Cr target, and use arc ion plating technology to deposit a transition metal Cr bonding layer with a thickness of 30 nanometers under the condition of 0.1Pa and 1200V; Then turn on the TiVZrNbHf target, deposit 1500 nanometers alternately grown CrN / TiVZrNbHfN support layer under 2.3Pa (nitrogen atmosphere) and 250V conditions (the thickness of single-layer CrN is 10 nanometers, the thickness of single-layer TiVZrNbHfN is 10 nanometers, and the modulation period is 20 nanometers) ;

[0050] 3) Turn off the Cr target, deposit 2000 nanometers of TiVZrNbHfN high-entr...

Embodiment 3

[0053] A super-hard, tough, high-entropy alloy nitride-coated cemented carbide blade, the schematic diagram of which is shown in figure 2 , the specific preparation steps are as follows:

[0054] 1) use figure 1 Described coating device, in 500 ℃, in argon and hydrogen environment (Ar and H 2 The volume ratio is 2:1), and the cemented carbide blade is plasma etched 0.1 micron (20min);

[0055] 2) Then turn on the Cr target, and use arc ion plating technology to deposit a transition metal Cr bonding layer with a thickness of 20 nanometers under the condition of 0.1Pa and 1200V; Then turn on the TiVZrNbHf target, and deposit 1000 nanometers of alternately grown CrN / TiVZrNbHfN support layers under the condition of 2.3Pa and 200V (the thickness of single-layer CrN is 10 nanometers, the thickness of single-layer TiVZrNbHfN is 20 nanometers, and the modulation period is 30 nanometers);

[0056] 3) Turn off the Cr target, deposit 1000 nanometers of TiVZrNbHfN high-entropy alloy h...

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Abstract

The invention discloses a superhard strong toughness and high-entropy alloy nitride nano-composite coating cemented carbide blade. A superhard nano-composite coating is deposited on a cemented carbidesurface, wherein the superhard nano-composite coating is composed of a bonding layer, a transition layer, a support layer, a stiffening layer, a wear-resistant layer and a temperature-resistant layer; the bonding layer is a pure Cr layer, and the transition layer is a CrN layer; the support layer is a nano-multilayer film formed through alternate growth of the transition layer and the stiffeninglayer, and the stiffening layer is a TiVZrNbHfN high-entropy alloy nitride layer; and the wear-resistant layer is a nano-multilayer film formed through alternate growth of the stiffening layer and thetemperature-resistant layer material, and the temperature-resistant layer is an AlCrNbSiTi high-entropy alloy nitride layer. According to the nano-composite coating cemented carbide blade, by adopting deign of various high-entropy alloy coating materials and composition gradient, the internal stress of the coating can be reduced greatly, and the toughness of the coating is improved; the disadvantage of low temperature resistance of an existing blade coating is overcome effectively; and the service life of the cemented carbide blade is prolonged greatly, and the adaptability of the cemented carbide blade is improved.

Description

technical field [0001] The invention belongs to the technical field of thin film materials, and in particular relates to a superhard, strong and tough high-entropy alloy nitride nanocomposite coated hard alloy blade and a preparation method thereof. Background technique [0002] With the extensive use of nickel-based superalloys in aerospace and energy fields, its processing problems have aroused widespread attention at home and abroad. Nickel-based superalloys have high strength, poor thermal conductivity, and severe work hardening. During high-speed cutting, the temperature of the tool tip is often higher than the thermal decomposition temperature of the coating, resulting in severe tool wear and failure. Plating the superhard nanostructure coating material on the surface of the tool can endow the cutting tool with new characteristics such as high hardness, high temperature resistance and low thermal conductivity, and greatly improve the cutting life and processing adaptab...

Claims

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Application Information

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IPC IPC(8): C23C14/16C23C14/06C23C14/32
CPCC23C14/0021C23C14/0641C23C14/16C23C14/325
Inventor 杨兵刘琰赵鑫吴忠烨
Owner WUHAN UNIV
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