Method and device for internal wall ceramic treatment of steel and iron pipe casting

Abstract

This invention discloses the ceramic processing method for the steel tube wall, fist choosing the steel tube with the metal aluminium layer on its wall, then fasting the electrode pole on the lumen of the steel tube, wherein the electrode pole connects with the cathode of the impulse dc source, the exterior surface of the steel tube connects with the positive pole of the power, keeping the cavityof the steel tube in the alkaline lyes, adjusting the pressure of the power to keep it invariable. This invention also discloses the devices of this method, which includes steel tube, impulse dc source, electrode pole and handling fluid circle device, the steel tube connects with the anode of the power, one end of the electrode pole connects with the cathode of the power, another in the lumen of the steel tube, and the handling fluid circle device keeps the temperature and the chroma of the handling fluid unform. This method also can produce the ceramic layer which can endure high temperatureand wearing and eroding, and has long longevity, and the structure of the device is simple, it is easy to install and take down.

Description

technical field [0001] The invention belongs to a method and a device for ceramicizing the inner wall of a steel pipe fitting, in particular to a method and a device for ceramicizing the inner wall of a steel pipe fitting by using plasma electrolytic oxidation technology. Background technique [0002] Steel pipe fittings are widely used in industry due to their excellent mechanical properties and flexibility, and they also contribute a lot to our daily life. In fact, for decades, steel pipe fittings have been widely used in industry and commerce, such as houses, bridges, furniture, automobiles and machinery, etc., and are also used as circulation pipes for supplying water, oil and gas, etc., but steel pipe fittings Corrosion and wear are common problems faced by all users. Ceramic materials are becoming a new generation of engineering materials due to their many characteristics such as corrosion resistance, wear resistance, high temperature resistance, and insulation. wide...

AI Technical Summary

Problems solved by technology

However, in addition to valve metals such as Ti, Al, Mg, Nb, Zr and Ta and their alloys, steels that are widely used in engineering cannot directly apply plasma electrolytic oxidation technology to prepare ceramic layers.

In recent years, self-propagating high-temperature synthesis technology, plasma spraying ceramics, laser cladding ceramics and vapor deposition ceramics technologies have been applied in some fields, but when these technologies are applied to ceramic coatings obtained on steel substrates, some are not easy. After post-processing, some treatment processes have a great influence on the heat of the substrate, and some are too expensive, so this technology is difficult to promote on a large scale, especially for the ceramicization of the inner surface of steel pipe fittings, these ceramicization methods exist technical difficulties

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