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Method for improving high toughness of titanium aluminum nitrogen coating on surface of hard alloy

A cemented carbide, titanium aluminum nitrogen technology, applied in metal material coating process, coating, solid diffusion coating and other directions, can solve the problems of large difference in thermodynamic properties, low bonding strength of coatings, easy to fall off, etc. Improve the bonding force and fracture toughness, good toughness, good toughness effect

Active Publication Date: 2019-02-15
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the lattice matching and thermodynamic properties between TiAlN coating and cemented carbide are quite different. Direct coating of TiAlN coating on cemented carbide often results in high coating hardness and poor toughness. However, problems such as low bonding strength and easy falling off of the layer seriously affect its practical application, so it is necessary to improve the strength and toughness of the titanium aluminum nitrogen coating on the surface of the cemented carbide

Method used

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  • Method for improving high toughness of titanium aluminum nitrogen coating on surface of hard alloy
  • Method for improving high toughness of titanium aluminum nitrogen coating on surface of hard alloy
  • Method for improving high toughness of titanium aluminum nitrogen coating on surface of hard alloy

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Embodiment 1

[0041] This embodiment provides a method for improving the strength and toughness of the titanium-aluminum-nitrogen coating on the surface of the cemented carbide by using the device as described above, comprising the following steps:

[0042] (1) Pretreatment of cemented carbide samples: mechanically grind and polish the YG8 cemented carbide sheet with a length and width of 16mm and a thickness of 4.5mm, and then immerse it in acetone, alcohol and distilled water for 10 minutes respectively for ultrasonic cleaning , dry with cold air for later use;

[0043] (2) Put the pretreated cemented carbide sample into such as figure 1 On the sample stage 4 of the double-glow plasma metallization equipment shown, the source 2 is fixed with a self-made tantalum wire target with a purity of 99.9%, a diameter of 2 mm and a length of 20 mm, and the source 2 is facing the sample stage 4. The distance between the sample stage 4 is 12mm, and then the auxiliary cathode cover 3 is placed, and a...

Embodiment 2

[0050] This embodiment provides a method for improving the strength and toughness of the titanium-aluminum-nitrogen coating on the surface of the cemented carbide by using the device described in Embodiment 1, comprising the following steps:

[0051] (1) Pretreatment of cemented carbide samples: mechanically grind and polish YG8 cemented carbide sheets with a length and width of 16mm and a thickness of 4.5mm, and then immerse them in acetone, alcohol and distilled water for 10 minutes respectively for ultrasonic cleaning , dry with cold air for later use;

[0052] (2) Put the pretreated cemented carbide sample into the figure 1 On the sample stage 4 of the double-glow plasma metallization equipment shown, the source 2 is fixed with a self-made tantalum wire target with a purity of 99.9%, a diameter of 2 mm and a length of 20 mm, and the source 2 is facing the sample stage 4. The distance between the sample stage 4 is 12mm, and then the auxiliary cathode cover 3 is placed, and...

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Abstract

The invention discloses a method for improving the high toughness of a titanium aluminum nitrogen coating on the surface of a hard alloy. The method comprises the following steps of placing a pretreated hard alloy sample onto a double-glow plasma surface alloying furnace sample table, suspending a self-made target material, and placing an auxiliary cathode; feeding argon after vacuumizing, applying high voltage to a cathode and a source electrode, maintaining a certain differential pressure, carrying out tantalum impregnation treatment on the sample after re-sputter cleaning; then taking a tantalum-impregnated sample out, loading onto a substrate table of a magnetron sputtering device, installing a titanium aluminum composite target, adjusting the distance between the target material and the sample, carrying out ion beam sputtering cleaning, then enabling the substrate table to directly face a direct-current pulse magnetron sputtering target, feeding argon and nitrogen, adjusting to acertain proportion, starting a grid bias power supply and a direct-current pulse power supply, and preparing the titanium aluminum nitrogen coating. The titanium aluminum nitrogen composite coating prepared through the method has high fracture toughness and bonding strength.

Description

technical field [0001] The invention relates to a method for improving the strength and toughness of a titanium-aluminum-nitrogen coating on the surface of a hard alloy, and belongs to the technical field of material surface modification. Background technique [0002] Cemented carbide is an alloy material made of hard compounds of refractory metals and bonding metals through powder metallurgy technology. It has a series of excellent properties such as high hardness, good strength and toughness, heat resistance, wear resistance, and corrosion resistance. Performance, is widely used as tool material, such as turning tool, milling cutter, planer, drill bit, boring tool, etc., for cutting cast iron, non-ferrous metals, plastics, chemical fibers, graphite, glass, stone and ordinary steel, but heat-resistant Steel, stainless steel, high manganese steel, tool steel and other difficult-to-machine materials will seriously affect the service life of the tool due to insufficient hardne...

Claims

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Application Information

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IPC IPC(8): C23C14/35C23C14/16C23C10/08
CPCC23C10/08C23C14/165C23C14/3485C23C14/35
Inventor 周兵刘竹波于盛旺吴玉程马永黑鸿君徐斌王雪松王钰鹏
Owner TAIYUAN UNIV OF TECH
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