A kind of surface modification method of magnesium alloy material
A surface modification, magnesium alloy technology, applied in metal processing, metal processing equipment, non-electric welding equipment, etc., can solve the problems of inability to achieve precise control, difficult surface coating, low stable temperature of magnesium alloy, etc., to achieve fast and efficient Metallurgical bonding, strong shape adaptability, and the effect of overcoming high vapor pressure
Inactive Publication Date: 2017-10-20
INNER MONGOLIA UNIV OF SCI & TECH
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Problems solved by technology
[0003] However, due to the low stable temperature of magnesium alloys (180°C), it brings difficulties to the PVD treatment of magnesium alloys. More importantly, the high and unstable vapor pressure of magnesium alloys in vacuum makes the coating composition difficult to achieve. Control, and PVD preparation equipment and process characteristics determine that it is difficult to surface coat complex-shaped surfaces and large-size workpiece surfaces
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Embodiment Construction
[0015] The present invention takes titanium silicon nitrogen, which has the highest hardness among ceramic materials, as an example to describe its process parameters in detail.
[0016] Titanium nitride was deposited on a 0.15 mm thick double-glazed aluminum foil, and then titanium silicon nitride was deposited on the titanium nitride layer. The specific implementation process is as follows: before depositing the titanium nitride film on the aluminum foil, first remove the oxide layer on the surface of the aluminum foil; use the magnetron sputtering method for vapor deposition, and the vacuum is lower than 3×10 -3 Argon gas was introduced at Pa, and the background partial pressure during deposition was 6×10 -1 Pa, the deposition temperature is 350°C, the titanium nitride power is 200W, the silicon content in the titanium silicon nitrogen film is 8at.%, and the deposition speed is about 0.15nm / s. In the specific implementation process, in order to increase the bonding perform...
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Abstract
The invention relates to a method for modifying the surface of a magnesium alloy material. The present invention is decomposed into two parts: the preparation of the coating and the bonding process, wherein the preparation of the coating is to deposit a protective or functional coating on the aluminum foil using a vapor deposition method, and the bonding process refers to the welding of magnesium-aluminum dissimilar materials. Utilizing the characteristics of aluminum materials, a series of metal and ceramic coatings can be selectively deposited, and then the magnesium-aluminum interface can be formed into a metallurgical bond by fusion welding or solid-state diffusion welding, thereby realizing the modification of the surface of the magnesium alloy material. The invention realizes the technical separation of the surface modification of the magnesium alloy, independent design and technical realization of the two parts, which not only overcomes the problems of high vapor pressure of magnesium and its alloys during vapor deposition, but also quickly and efficiently realizes the coating and Metallurgical bonding on the surface of magnesium alloy materials. At the same time, the invention has strong adaptability to the surface shape of the magnesium alloy material, can realize coating on the surface with complex shape and large-sized workpiece surface, and can also repair the surface of the magnesium alloy material.
Description
technical field [0001] The invention relates to a surface treatment method combining vapor deposition and welding technology, in particular to a surface modification method of a magnesium alloy material. Background technique [0002] Magnesium and magnesium alloys are widely used in aerospace, transportation, electronic equipment, and communication equipment because of their low density, high specific strength and rigidity, good heat conduction and electrical conductivity, good machining performance, and good for recycling. , military supplies, machinery and equipment and other fields. Due to the poor corrosion resistance of magnesium alloys in acidic and neutral environments, low strength and hardness at room temperature, and poor wear resistance, this has become a key problem restricting its development and application. Surface modification of magnesium alloy is an effective way to improve its properties. At present, almost all surface treatment methods have been tried o...
Claims
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IPC IPC(8): C23C14/35B23K20/02B23K20/233B23K101/18
Inventor 徐平平任元孙士阳刘学杰
Owner INNER MONGOLIA UNIV OF SCI & TECH