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Modification method for alloying surface of magnesium alloy

A surface alloying and magnesium alloying technology, which is applied in metal material coating process, ion implantation plating, coating, etc., can solve the problems of magnesium alloy surface alloying modification, etc., to improve strength, improve purity, and avoid pollution Effect

Inactive Publication Date: 2014-05-07
CHONGQING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although some scholars have used different surface modification methods to improve the wear resistance and corrosion resistance of magnesium and magnesium alloy surfaces, no one has used magnetron sputtering to coat alloy films and high-current pulsed electron beam radiation heating. Study on Alloying Modification of Magnesium Alloy Surface by Combined Method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Put the nickel block and chromium block with a weight percentage of 95:5 into the intermediate frequency vacuum induction melting furnace, and evacuate to P=2.0×10 -3After Pa, turn on the intermediate frequency power supply for induction heating and melting. After the alloy is completely melted, it is poured into a water-cooled copper crucible with a diameter of 70 mm. Remove the outer skin of the cast NiCr5 alloy ingot, and saw it into a disc shape, and polish the surface of the NiCr5 alloy in the disc shape, make it smooth and clean, and then load it into the target material of the vacuum magnetron sputtering equipment On the device, the NiCr5 alloy target used for magnetron sputtering coating. Grind the surface of the AZ91D magnesium alloy with metallographic sandpaper. After the surface is smooth and flat, clean it with clean water, drop it on the surface of the sample with ethanol solution, and dry it with a hair dryer. After drying, the surface of the sample has n...

Embodiment ２

[0025] Put the nickel block and chromium block with a weight percentage of 90:10 into the intermediate frequency vacuum induction melting furnace, and evacuate to P=3.0×10 -3 After Pa, turn on the intermediate frequency power supply for induction heating and melting. After the alloy is completely melted, pour it into a water-cooled copper crucible with a diameter of 70mm. Remove the skin of the cast NiCr10 alloy ingot, and saw it into a disc shape, and polish the surface of the NiCr10 alloy in the disc shape, make it smooth and clean, and then load it into the target material of the vacuum magnetron sputtering equipment On the device, NiCr10 alloy target for magnetron sputtering coating. Grind the surface of the AZ91D magnesium alloy with metallographic sandpaper. After the surface is smooth and flat, clean it with clean water, drop it on the surface of the sample with ethanol solution, and dry it with a hair dryer. After drying, the surface of the sample has no Traces of wat...

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Abstract

The invention provides a modification method for alloying the surface of magnesium alloy. A Ni-Cr alloy ingot with a Crwt.% content of 3-20 percent is firstly prepared by adopting a vacuum induction melting method and is fixedly mounted on a target device of vacuum magnetron sputtering equipment after the surface skin of the ingot is removed and the ingot is polished; the magnesium alloy of which the surface is polished clean is mounted on a matched fixture and is loaded into a vacuum chamber of the magnetron sputtering equipment; the magnetron sputtering coating equipment is turned on, and a Ni-Cr alloy film which is 2-10Mum in thickness is coated on the surface of the magnesium alloy substrate; and the magnesium alloy on the surface of which the Ni-Cr alloy film is well coated is put into high-current pulse electron beam equipment to be subject to electron beam surface alloying treatment. According to the method provided by the invention, the Ni-Cr alloyed layer with high micro hardness, good abrasive resistance and good corrosion resistance is formed on the surface of the magnesium alloy and a good binding force exists between the alloyed layer and the magnesium alloy substrate, so the surface strength of the magnesium alloy, and the abrasive resistance and the corrosion resistance of the surface of the magnesium alloy can be effectively improved.

Description

technical field [0001] The invention relates to a method for alloying and modifying the surface of a magnesium alloy. The method is to form an alloyed layer with high hardness, high wear resistance and high corrosion resistance on the surface of magnesium alloy by using magnetron sputtering coating and high-current pulsed electron beam radiation heating, which belongs to the technical field of material surface modification . Background technique [0002] Magnesium and its alloys have been widely used in the fields of aviation, aerospace, automobiles, communications, electronics and machinery, etc. in recent years due to their low density, high specific strength, specific stiffness, environmental protection, and easy recycling. . However, due to the high chemical activity of magnesium, high solubility and corrosion rate in the atmosphere, acidic substances and salts, and the corrosion products formed are poor in stability and relatively loose, corrosion resistance is one of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C14/35C23C14/16C23C14/58
Inventor 周志明黄伟九唐丽文陈元芳魏炳伟张宝亮宋小放王祥
Owner CHONGQING UNIV OF TECH