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Surface modification method for titanium alloy

A surface modification, titanium alloy technology, applied in metal material coating process, coating, fusion spraying, etc., can solve the problems of low surface hardness and poor wear resistance of titanium alloy, and achieve surface structure and performance improvement, energy High interest rate, the effect of improving special physical and chemical properties

Active Publication Date: 2016-10-12
WENZHOU UNIVERSITY
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Problems solved by technology

[0004] In order to solve the problems of low surface hardness and poor wear resistance of titanium alloys in the prior art, the present invention provides a method for modifying the surface of titanium alloys to improve the hardness of the surface of titanium alloys and reduce the wear rate

Method used

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  • Surface modification method for titanium alloy
  • Surface modification method for titanium alloy

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Embodiment 1

[0022] Figure 1 and figure 2 Said, a method for surface modification of titanium alloy, the titanium foil adopts industrial pure titanium VT1-0, the surface of the titanium foil is alloyed by electric explosion technology, and the yttrium metal powder is used as the cathode. The technical parameters of electric explosion are: the absorbed power density at the jet axis is 5.5GW / m 2 , the plasma action time is 100μs, and the gas residual pressure in the working chamber is 100Pa. The process parameters for modifying the surface of the alloyed titanium foil by high-current pulsed electron beam irradiation technology are: electron energy 18kev, electron beam energy density 50J / cm 2 , the number of pulses is 3 times, the pulse time is 150μs, and the frequency is 0.3Hz. The above two steps are completed in a vacuum state.

[0023] Such as figure 2 As shown, the microstructural diagrams of titanium alloy surface modification layer and titanium alloy layer under different scales, ...

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Abstract

The invention provides a surface modification method for titanium alloy. The surface modification method is characterized by comprising the following steps that a, electrical explosion treatment is conducted, specifically, metal powder of the alloy serves as the cathode, electrical explosion treatment is conducted on the surface of the titanium alloy, and alloying of the surface of titanium foil is achieved; and b, high-current pulsed electron beams are used for irradiation treatment, specifically, irradiation treatment is conducted on the surface of the titanium foil subjected to alloying through the high-current pulsed electron beams, so that modification is achieved, and a metal ceramic modified layer is obtained. According to the surface modification method, the surface of the titanium foil is subjected to modification treatment, a surface modified layer is of a multi-layer structure and is composed of a plurality of phases and provided with micro-nano structures, and the surface modified layer is generated along with oxides and carbides of titanium and yttrium; and through the metal ceramic layer formed on the surface, the microhardness is improved easily, and the friction coefficient and wear rate are decreased.

Description

technical field [0001] The invention relates to the technical field of surface modification of materials, in particular to a method for surface modification of titanium alloys. Background technique [0002] Due to its low density, high specific strength, good mechanical properties and corrosion resistance, titanium alloys have been more and more widely used in recent years, and have been gradually extended from the aerospace field to the automotive, chemical, electric, biomedical and seawater desalination industries. and other fields. [0003] Titanium alloys have been widely used because of their many excellent properties, but titanium alloys also have their advantages and disadvantages. Its main disadvantages are low surface hardness and poor wear resistance. The hardness of titanium alloys usually does not exceed 350HV. In many cases, such hardness values ​​cannot meet the requirements of actual production applications. For example, when used as a sliding part, it is pr...

Claims

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Application Information

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IPC IPC(8): C23F17/00C23C4/126C23C4/08C23C10/28C22F1/18
CPCC22F1/183C23C4/08C23C10/28C23F17/00
Inventor 陈希章谢尔盖·科诺瓦洛夫
Owner WENZHOU UNIVERSITY
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