Hard coating, preparation method thereof, and coated article with the coating

A hard coating and hard technology, which is applied in coatings, chemical instruments and methods, metal material coating technology, etc., can solve the problems of coating mechanical properties decline and cannot meet the high-speed cutting of stainless steel well, and achieve The effect of small internal stress, excellent interfacial bonding, and high melting point

Inactive Publication Date: 2011-12-28
HONGFUJIN PRECISION ELECTRONICS (ZHENGZHOU) CO LTD +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, the ordinary TiAlN coating has a HV hardness of 30±5GPa and an anti-oxidation temperature of 800°C, which can no longer meet the high-speed cutting of difficult-to-machine materials such as stainless steel.
Increasing the Al content in the TiAlN coating can improve the hardness and oxidation resistance of the coating, but too high Al content will lead to a sharp decline in the mechanical properties of the coating

Method used

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  • Hard coating, preparation method thereof, and coated article with the coating
  • Hard coating, preparation method thereof, and coated article with the coating

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Embodiment Construction

[0023] The "atomic percentage content" referred to in the present invention refers to the atomic number percentage content.

[0024] see figure 1 , the hard coating 10 of the preferred embodiment of the present invention is composed of a transition layer 11 , an intermediate layer 13 and an outermost layer 15 sequentially formed on a hard substrate 20 . The substrate 20 can be high speed steel, hard alloy, cermet and so on.

[0025] The transition layer 11 is directly deposited on the surface of the substrate 20, and the transition layer 11 is composed of Ti-Nb-N tricomponent, wherein the atomic percentage of Ti is about 50-60%, and the atomic percentage of Nb is about 4-6. %, N atomic percentage is about 35-45%. In this embodiment, the atomic percentage of Ti in the transition layer 11 is 55%, the atomic percentage of Nb is 5%, and the atomic percentage of N is 40%.

[0026] The intermediate layer 13 is formed directly on the transition layer 11 . The intermediate layer 1...

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Abstract

The invention provides a hard coating. The hard coating is composed of a transition layer, an intermediate layer and an outermost layer orderly formed on a hard substrate; the transition layer is composed of Ti-Nb-N three components, the intermediate layer and the outermost layer are all composed of Ti-Si-Nb-B four components; the percent contents of Ti atoms and Nb atoms in the outermost layer are respectively less than that in the intermediate layer, and the percent content of Si atoms in the outermost layer is more than that in the intermediate layer. The invention further provides a preparation method of the hard coating and a covering element having the hard coating.

Description

technical field [0001] The invention relates to a PVD hard coating, a preparation method thereof and a coated part with the coating. Background technique [0002] The coating process is widely used in the industrial field. Among them, TiN thin film coating on the surface of the tool or mold can greatly improve the service life of the tool and mold. However, with the development of metal cutting towards high cutting speed, high feed speed, high reliability, long life, high precision and good cutting control, higher requirements are put forward for the performance of surface coating. TiN coatings have gradually failed to meet further requirements in terms of hardness, wear resistance, and oxidation and ablation resistance. [0003] Adding Cr, Al and other metal elements on the basis of TiN coating can further improve its hardness and oxidation resistance. Among them, the hardness and high temperature oxidation resistance of TiAlN coating are greatly improved compared with TiN...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B15/01C23C14/24C23C14/06
CPCC22C14/00B32B15/01C23C14/0641C23C14/027
Inventor 张新倍陈文荣蒋焕梧陈正士彭立全
Owner HONGFUJIN PRECISION ELECTRONICS (ZHENGZHOU) CO LTD
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