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Method for preparing AlCrTiN/WC-12Co composite coating on surface of hot-work die steel

A technology of hot work die steel and composite coating, applied in the treatment of cathode ion plating and supersonic flame spraying on the surface of hot work die steel, and in the field of preparing AlCrTiN/WC-12Co composite coating on the surface of hot work die steel, which can solve the problem of Can not meet the actual production needs, cathodic ion plating coating wear and failure and other problems, to achieve the effect of improving hardness, scientific method, and clear preparation principle

Inactive Publication Date: 2019-01-08
YANGZHOU UNIV +1
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Problems solved by technology

[0004] The invention aims at the situation that the cathodic ion plating coating is prone to wear and failure under service conditions and cannot meet the actual production requirements, and proposes a method for preparing an AlCrTiN / WC-12Co composite coating on the surface of a hot-working die steel

Method used

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  • Method for preparing AlCrTiN/WC-12Co composite coating on surface of hot-work die steel
  • Method for preparing AlCrTiN/WC-12Co composite coating on surface of hot-work die steel
  • Method for preparing AlCrTiN/WC-12Co composite coating on surface of hot-work die steel

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Embodiment Construction

[0022] The present invention will be further described below through the technical scheme, drawings and embodiments of the present invention.

[0023] (1) Place the sample of the hot work die steel matrix in an ethanol solution and ultrasonically clean it for 20 minutes to remove oil and impurities on the matrix, and then use 40-mesh corundum to roughen the surface of the matrix by sandblasting.

[0024] (2) When spraying WC-12Co coating, aviation kerosene is used as fuel, oxygen is used as combustion-supporting gas, and nitrogen is used as powder feeding gas. The oil pressure is 1.25MPa, the oxygen pressure is 1.58MPa, the water temperature is controlled at 35°C, and the spraying pressure is 0.95MPa, such as figure 1 shown.

[0025] (3) The surface structure of the prepared WC-12Co coating is dense and the porosity is low, such as image 3 shown. The coating is tightly combined with the substrate without peeling off and cracks, such as Figure 4 shown.

[0026] (4) The W...

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Abstract

The invention relates to a method for preparing an AlCrTiN / WC-12Co composite coating on the surface of hot-work die steel, and belongs to a material surface modified composite treatment technology. The method is scientific and clear in preparation principle. The WC-12Co coating is prepared by spray-coating the surface of H13 hot-work die steel with hypersonic flame, so that the surface hardness ofthe matrix is increased, the wear resistance of particles is enhanced, the hardness gradient between the coating and the matrix is reduced and guarantee is provided for the use of an AlCrTiN coating.The AlCrTiN coating is prepared by plating the surface of the WC-12Co coating with cathode ions, the AlCrTiN / WC-12Co composite coating prepared by the method is obtained and has a nitride phase witha cubic structure, and the surface hardness, the oxidation resistance and the heat stability are further improved.

Description

technical field [0001] The invention belongs to material surface modification compound treatment technology, relates to a treatment method of cathodic ion plating and supersonic flame spraying on the surface of hot work die steel, specifically refers to the preparation of AlCrTiN / WC- 12Co Composite Coating Method. Background technique [0002] Steel is known as "the material basis of contemporary society". As a basic alloy steel, H13 hot work die steel has good wear resistance, corrosion resistance and mechanical strength, and is widely used in forging, casting and die-casting mold manufacturing. In order to meet the requirements of hot work dies, many grades of die steels have been developed in recent years. Since hot work dies have been in high-temperature and high-load working environments for a long time, the development of new die steels can no longer meet the needs of wear performance. Therefore, it is necessary to use coating technology for surface modification to a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/02C23C4/04C23C4/129C23C14/02C23C14/06C23C14/32C23C28/00
CPCC23C4/02C23C4/04C23C4/129C23C14/024C23C14/028C23C14/0641C23C14/32C23C28/34
Inventor 孔维程沈辉金亦富王浩锦刘彻高佳旭王思凡景陶敬黄国林任宪奇
Owner YANGZHOU UNIV
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