Principle And Characteristics Of Micro-arc Oxidation Technology

- May 29, 2019-

First, the principle and characteristics of micro-arc oxidation technology: Micro-arc oxidation ceramic technology is a high-tech in-situ growth of ceramic layers on the surface of light metal alloys such as aluminum, magnesium and titanium. The principle is that the polarizing film is converted into a ceramic phase by a micro-arc instantaneous 7000K high temperature while anodizing film is formed on the surface of the workpiece. The ceramic layer has high hardness, high wear resistance, good toughness, strong adhesion to the substrate, corrosion resistance, high temperature oxidation resistance, good insulation, and is particularly suitable for high speed sports and high wear resistance, corrosion resistance and high temperature impact resistance of light metal alloys. Parts. Russia, the United States, Germany, Japan and other countries have reached a considerable level of application in the aviation, aerospace, weapons, automotive, shipbuilding, machinery, petroleum, chemical, medical, electronics and other industries. The promotion and application of this technology and industrialization will certainly promote the development of related industries and become a new economic growth point. The outstanding features of micro-arc oxidation technology are:


(1) The surface hardness of the material is greatly improved, and the microhardness is 1000 to 2000 HV, which is comparable to that of the cemented carbide, and greatly exceeds the hardness of the high carbon steel, high alloy steel and high speed tool steel after heat treatment;


(2) good wear resistance;


(3) Good heat resistance and corrosion resistance. This fundamentally overcomes the shortcomings of aluminum, magnesium and titanium alloy materials in application, so the technology has broad application prospects;


(4) It has good insulation performance and the insulation resistance can reach more than 100MΩ.


(5) The in-situ growth ceramic film of the substrate is firmly bonded, and the ceramic film is dense and uniform.


Aluminum industry network


Second, the applicable fields: Micro-arc oxidation technology is widely used in aerospace, aviation, weapons, machinery, automotive, transportation, petrochemical, textile, printing, hood, electronics, light industry, medical and other industries. Such as: the mother-made missile propeller of aluminum alloy processing, the bottom of the projectile, the aluminum alloy valve, the piston in the internal combustion engine, the cylinder and the valve core in the pneumatic component, the cylinder in the pneumatic tool, the guide yarn in the textile machinery and the spinning Cups, pick-up rolls and printing rolls in the press. Magnesium alloy car hood and case, pedal, steering wheel and seat, 3C product housing. Anti-corrosion parts in ship submarines of titanium alloys, corrosion-resistant containers and equipment in the petrochemical and pharmaceutical industries. It can also be applied to the surface repair of components.


Third, the current domestic manufacturers and markets: At present, domestic micro-arc oxidation manufacturers can only quantify the production of only a few companies! But according to the micro-arc oxidation technology of each enterprise, it can produce a large number of industrial production micro-arc oxidation equipment and processes. The manufacturers are less and less. According to the environmental protection requirements of the National Environmental Protection Agency for the surface treatment industry, some old surface treatment equipment and technologies are not adapted to the national environmental protection requirements, and the micro-arc oxidation equipment and technology are born. Filled this gap. Solved the pollution-free environment-friendly surface treatment equipment! At present, many colleges and universities are still in the research stage of micro-arc oxidation, and we as a research and development center based on the requirements of different customers and different customers on products and processes. And developed micro-arc oxidation equipment and processes that are more suitable for quantitative production!


Transfer from aluminum road network