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Method for improving MCrAlY coating life on surface of titanium alloy basement

A coating life, titanium alloy technology, applied in the field of metallurgy, can solve problems such as coating cracking and peeling

Inactive Publication Date: 2005-02-23
陈力学
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, the MCrAlY coating also has its limitations. When working in an environment above 800 ° C, the elements in the coating will interdiffuse with the titanium alloy substrate to form many compounds, including TiCr 2 It is a brittle compound, which embrittles the bonding surface between the coating and the titanium alloy substrate, causing the coating to crack and peel off

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  • Method for improving MCrAlY coating life on surface of titanium alloy basement

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Embodiment Construction

[0007] A method for improving the service life of the MCrAlY coating on the surface of the titanium alloy substrate, the method is to adopt the PVD method to first deposit a pure Ni layer on the surface of the titanium alloy substrate, and then deposit an MCrAlY coating (M=Co or Ni) on the pure Ni layer . See attached figure 1 , in the figure [1] is the titanium alloy substrate, [2] is the pure Ni layer on the surface of the titanium alloy substrate, and [3] is the MCrAlY coating deposited on the pure Ni layer.

[0008] The thickness of the pure Ni layer can be determined according to actual needs.

[0009] After the titanium alloy undergoes the above treatment, at high temperature, the following interdiffusion will occur between the titanium alloy and the surface coating:

[0010] , .

[0011] In the diffusion system of the titanium alloy substrate and the Ni layer, TiNi metal compounds with good toughness will be formed without the brittleness of the Ni layer....

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Abstract

A method for improving life of titanium alloy coating by PVD technology includes depositing pure Ni layer on titanium surface matrix and depositing MCrAlY coating(M=Co or Ni) on pure Ni layer. It can be used to inhibit TiCr2 brittle phase formation and improve MCrAlY life.

Description

Technical field: [0001] The invention relates to a titanium alloy surface treatment method in the field of metallurgy, in particular to a method for improving the service life of an MCrAlY coating on the surface of a titanium alloy substrate. Background technique: [0002] Due to its high specific strength and good red hardness, titanium alloys are more and more widely used in some military and civilian important occasions. However, titanium alloys strongly absorb gas at a high temperature of 500°C, which leads to deterioration of their mechanical properties. Therefore, Improving the high temperature ablation resistance of titanium alloys has become an important topic of global concern. [0003] Among the many researches carried out at home and abroad, the most effective method is to coat MCrAlY (M=Co or Ni) coating on the titanium alloy substrate. The coating can significantly hinder the diffusion of harmful gas into the titanium alloy matrix, thereby improving the high te...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/14C23C30/00
Inventor 陈力学
Owner 陈力学