High-precision antiseptic wear-resisting oil tube and manufacturing method thereof

Abstract

The invention discloses a high-precision antiseptic wear-resisting oil tube and a manufacturing method thereof. The steel tube comprises a tube body (1), an inner clad layer (2) is arranged on the inner wall of the tube body (1), and an outer clad layer (3) is arranged on the outer wall of the tube body (1); and the inner clad layer is a hot galvanizing or chemical nickel-plating phosphorus alloy, and the outer clad layer is eletrodeposited chromium, a nickel-chromium composite coating or a chemical nickel-plating phosphorus alloy. According to the high-precision antiseptic wear-resisting oil tube, the surface treatment manner is adopted to form antiseptic layers on the inner wall and the outer wall of the steel tube, the corrosion resistance of the steel tube can be effectively improved, the using requirements in coastal regions are met, and the accuracy is easily controlled. Meanwhile, the oil tube is manufactured through the methods of cold plastic working, local upsetting and coating forming on the outer surface, the manufacturing process is simple, the manufactured steel tube has the high abrasive resistance and the high rot resistance, the accuracy is guaranteed, and the high-precision antiseptic wear-resisting oil tube can be applied to a hydraulic oil tube with high requirements for corrosion resistance of the inner surface and the outer surface and with a sealing fit external circle forming a friction pair.

Description

technical field [0001] The invention relates to a high-precision anti-corrosion and wear-resistant oil pipe and a manufacturing method thereof, belonging to the technical field of steel pipes. Background technique [0002] Hydraulic oil pipes in the industry generally use cold-rolled or cold-drawn pipes, supplemented by phosphating on the outer wall to prevent rust. With the optimization of the structural design of the hydraulic cylinder, the functional requirements of the oil pipe have also changed. In special cases, the oil pipe is required to bear part of the performance of the piston rod, that is, the outer surface of the oil pipe is over-sealed, the inner hole is open to the atmosphere, and it has a certain stroke. , The converted performance is: the outer surface is anti-corrosion and wear-resistant; the inner surface is corrosion-resistant; the outer circle has high dimensional accuracy; the end has good weldability and high weld strength. Conventional phosphating tr...

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Problems solved by technology

[0004] 1. The anti-corrosion measures involved are anti-corrosion coatings, which cannot control the dimensional accuracy of steel pipes and cannot be used for oil pipes;

[0005] 2. The anti-corrosion coating used does not have wear-resistant characteristics and has low wear resistance;

[0006] 3. The two ends of the anti-corrosion steel pipe body are welded with stainless steel nozzles. Although the anti-corrosion performance of the weld position is not mentioned, generally speaking, the corrosion resistance of the weld position is lower than that of the base metal on both sides, so the overall anti-rust performance will be due to Reduced by the presence of welding

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