Hard alloy surface treatment method and application

A hard alloy and surface treatment technology, which is applied in metal material coating process, ion implantation plating, coating, etc., can solve the problems of high cost, coating failure, loose surface structure, etc., and achieve easy operation and extended use The effect of life and service performance improvement

Inactive Publication Date: 2019-10-18
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention provides a cemented carbide surface treatment method and its application, which is used to solve the problem of preventing the diffusion of Co in the cemented carbide to the coating in the prior art, which will cause the surface structure to be loose, costly, and cause the coating to fail. The problem

Method used

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  • Hard alloy surface treatment method and application
  • Hard alloy surface treatment method and application
  • Hard alloy surface treatment method and application

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Embodiment 1

[0048] The present embodiment carries out the surface treatment of cemented carbide, comprises the following steps:

[0049] 1) Surface pretreatment of WC-8% Co cemented carbide: Carburize the surface of WC-8% Co cemented carbide, specifically: take WC-8% Co cemented carbide as a sample, place the sample In a hydrogen atmosphere furnace, heat to 800°C for pre-sintering for 0.5h, and then heat to 1320°C for 1h for carburizing treatment. Acetylene is used as the carburizing carbon source, and the flow ratio of hydrogen and acetylene is 100:3.

[0050] 2) Surface cleaning of the cemented carbide obtained by surface carburizing treatment: Polish the cemented carbide obtained by surface carburizing treatment. After polishing to the mirror surface, first use acetone to ultrasonically clean the cemented carbide for 15 minutes, and then use alcohol to ultrasonically clean the hard alloy. cemented carbide for 15min, then dry the cemented carbide and put it in a vacuum chamber.

[0051...

Embodiment 2

[0058] The present embodiment carries out the surface treatment of cemented carbide, comprises the following steps:

[0059] 1) Surface pretreatment of WC-6% Co cemented carbide: Carburize the surface of WC-6% Co cemented carbide, specifically: take WC-6% Co cemented carbide as a sample, place the sample In a hydrogen atmosphere furnace, heat to 850°C for pre-sintering for 0.5h, and then heat to 1310°C for 0.8h for carburizing treatment. Acetylene is used as the carburizing carbon source, and the flow ratio of hydrogen and acetylene is 100:2.

[0060] 2) Surface cleaning of the cemented carbide obtained by surface carburizing treatment: Polish the cemented carbide obtained by surface carburizing treatment. After polishing to the mirror surface, first use acetone to ultrasonically clean the cemented carbide for 20 minutes, and then use alcohol to ultrasonically clean the hard alloy. cemented carbide for 20min, then dry the cemented carbide and put it in a vacuum chamber.

[00...

Embodiment 3

[0068] The present embodiment carries out the surface treatment of cemented carbide, comprises the following steps:

[0069] 1) Surface pretreatment of YT-15 cemented carbide: surface nitriding treatment of YT-15 cemented carbide, specifically: take YT-15 cemented carbide as a sample, place the sample in a vacuum sintering furnace, The vacuum sintering furnace is evacuated to below 10Pa, heated to 350°C and kept for 2h, then nitrogen gas is introduced, and heated to 1450°C for 1.5h.

[0070] 2) Clean the surface of the cemented carbide obtained by surface nitriding treatment: polish the cemented carbide obtained by surface nitriding treatment. After polishing to the mirror surface, first use acetone to ultrasonically clean the cemented carbide for 25 minutes, and then use alcohol to ultrasonically clean the hard alloy. cemented carbide for 25min, then dry the cemented carbide and put it in a vacuum chamber.

[0071] 3) Glow cleaning of cemented carbide: raise the temperature ...

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Abstract

The invention belongs to the technical field of hard alloy materials, and in particular relates to a hard alloy surface treatment method and an application. According to the hard alloy surface treatment method provided by the invention, as surface carburizing treatment or surface nitriding treatment is carried out on a hard alloy, the obtained hard alloy has a surface Co poor layer and can inhibitdiffusion of Co in the hard alloy to a coating effectively. The thermal expansion matching property of the coating and the hard alloy is improved, so that the mechanical property of the coating at ahigh temperature is improved. The service performance of the coating is improved obviously, and the service life of an AlTiN coating is prolonged. A product is high in mechanical property, good in wear resistance and excellent in cutting performance at a high temperature.

Description

technical field [0001] The invention belongs to the technical field of hard alloy materials, and in particular relates to a hard alloy surface treatment method and its application. Background technique [0002] Cemented carbide is widely used in manufacturing as cutting tool material due to its high hardness and high wear resistance. AlTiN coating has the characteristics of high hardness, high film-base bonding strength, small friction coefficient, and oxidation temperature above 800°C. It is the mainstream tool coating today, especially suitable for cutting high-temperature alloy steel, stainless steel, titanium alloy, nickel, etc. materials such as base alloys. However, Co as the binder phase in the cemented carbide diffuses seriously to the coating at high temperature, the mechanical properties of the coating are significantly reduced, and the service life of the coated tool is significantly reduced. In addition, the thermal expansion coefficient of Co is relatively lar...

Claims

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Application Information

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IPC IPC(8): C23C8/20C23C8/24C23C14/06C23C14/32
CPCC23C8/20C23C8/24C23C14/0021C23C14/0641C23C14/325
Inventor 王启民李季飞张腾飞杨光杰
Owner GUANGDONG UNIV OF TECH
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