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Cutting tool composite coating and preparing method thereof

A composite coating and cutting tool technology, applied in the field of cutting tool coating, can solve problems such as coating peeling, film collapse, and low tool yield, and achieve the effect of relieving interlayer stress

Active Publication Date: 2019-10-25
ARISON SURFACE TECH SUZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the content of Si atoms in the TiSiN coatings used by domestic coating companies and cutting tool companies is generally 15% or less, mainly because after the Si content is further increased, the coating and the tool base material or the coating layer will be due to excessively high Stress leads to film collapse, especially when the coating thickness is greater than 2 μm, the direct result is that the tool yield after coating is too low or the coating falls off during use
[0006] In order to overcome the lack of performance of TiSiN coating with high Si content, and to make it meet the needs of cutting high-alloy steel materials such as die steel, high-speed steel, and high-temperature alloy steel, for TiSiN coatings with Si content of 15-30%, high-silicon TiSiN coatings, The invention provides a cutting tool composite coating with a periodic composite structure and a preparation method thereof, which has a good film base adhesion effect under the premise of relatively high hardness, and can be used to process mold steel and high-speed steel , high temperature alloy steel or even hardened steel

Method used

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  • Cutting tool composite coating and preparing method thereof

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preparation example Construction

[0034] In some embodiments, the method for preparing a composite coating for a cutting tool includes the following steps:

[0035]1) A primer layer 2 and a TiAlN transition layer 3 are sequentially deposited on the surface of the cutting tool base layer by a multi-arc ion plating process;

[0036] 2) A functional layer is deposited on the surface of the TiAlN transition layer 3, specifically, a TiAlN monolayer 4, a TiAlN / TiSiN nanocomposite layer 5, a TiSiN monolayer 6 and a TiAlN / TiSiN nanocomposite layer 10 are sequentially deposited on the surface of the TiAlN transition layer 3 as The functional layer of a cycle cycle includes 5-20 cycle cycles; (TiAlN single layer 4, TiAlN / TiSiN nanocomposite layer 5, TiSiN single layer 6, TiAlN / TiSiN nanocomposite layer 10 is a cycle cycle, a total cycle of 5- 20 times).

[0037] In some embodiments, the primer layer 2 is TiN, CrN or ZrN, the thickness of the primer layer 2 is 50-300nm, the TiAlN transition layer 3 is deposited on the s...

Embodiment 1

[0042] Use the cemented carbide blade of YG8 material as the substrate, first clean the blade with an industrial cleaning line, then put it into the coating machine, evacuate it to below 5e-4mBar, heat it to 400°C and etch the surface of the blade with Ar ions. A 200nm thick TiN layer and a 500nm thick Ti layer are sequentially deposited on the blade by a multi-arc ion plating process 0.6 Al 0.4 N transition layer, and then deposit the functional layer according to the method of "TiAlN single layer-TiAlN / TiSiN nanocomposite layer-TiSiN single layer-TiAlN / TiSiN nanocomposite layer". During the deposition of the functional layer, the TiAl target is first opened to deposit 50nm Ti 0.6 Al 0.4 N layer, then turn on the TiAl target and TiSi target at the same time, and deposit 50nm Ti 0.6 Al 0.4 N and Ti 0.7 Si 0.3 A composite layer of N, and then close the TiAl target to deposit Ti with a thickness of 60 nm 0.7 Si 0.3 N layer, and then turn on the TiAl target and TiSi target...

comparative example 1

[0044] Use the cemented carbide blade of YG8 material as the substrate, first clean the blade with an industrial cleaning line, then put it into the coating machine, evacuate it to below 5e-4mBar, heat it to 400°C and etch the surface of the blade with Ar ions. A 200nm thick TiN layer and a 500nm thick Ti layer are sequentially deposited on the blade by a multi-arc ion plating process 0.6 Al 0.4 N transition layer, functional layer uses TiSi target to deposit Ti with a thickness of 3.0um 0.7 Si 0.3 N single-layer coating, the total thickness of the coating is about 3.7μm. The hardness of the coating obtained by this method is 4300-4500HV, the scratch adhesion is less than 60N, and it is easy to peel off.

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Abstract

The invention discloses a cutting tool composite coating. A functional layer of the cutting tool composite coating comprises a TiAlN single layer, a TiAlN / TiSiN nano composite layer, a TiSiN single layer and a TiAlN / TiSiN nano composite layer; the TiAlN / TiSiN nano composite layer, the TiSiN single layer and the TiAlN / TiSiN nano composite layer are sequentially deposited on the surface of the TiAlNsingle layer; and the functional layer is a composite coating containing a plurality of cycle periods. By means of the cutting tool composite coating and a preparing method of the cutting tool composite coating, the cutting tool composite coating is of a periodic composite structure; on the premise of high hardness, the good film-based adhesion effect is achieved, and the cutting tool composite coating and the preparing method can be used for processing die steel, high-speed steel, high-temperature alloy steel or even hardened steel.

Description

technical field [0001] The invention relates to the technical field of cutting tool coatings, in particular to a cutting tool composite coating and a preparation method thereof. Background technique [0002] In recent decades, coating technology has been widely used in the field of cutting tool protection, which has greatly improved tool life, machining accuracy and efficiency. In the field of high-alloy steel cutting, such as die steel, high-speed steel, and high-temperature alloy steel cutting, the commonly used TiAlN and AlCrN coatings can no longer meet the needs of processing occasions. More and more tool manufacturers choose to use TiSiN series coatings. Floor. doped with amorphous Si 3 N 4 The TiSiN coating has been proved to have excellent oxidation resistance and red hardness, especially the hardness of the TiSiN coating can reach more than 4000HV, and can even be used to process hardened steel. [0003] The performance of the TiSiN coating is directly related t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/32C23C14/06
CPCC23C14/0021C23C14/0641C23C14/325
Inventor 毛昌海祖全先
Owner ARISON SURFACE TECH SUZHOU
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