Composite coating piston ring inlaid with wear-resistant particles, and processing method thereof

Abstract

The invention discloses a composite coating piston ring inlaid with wear-resistant particles. The composite coating piston ring comprises a cast iron body and a composite coating layer plated on the outer circle of the main body, wherein the composite coating layer is a mesh-patterned electroplating coating inlaid with the wear-resistant particles; and the wear-resistant particles are one or more selected from silicon carbide, silicon dioxide, aluminium trioxide and diamond. A processing method of the composite coating piston ring inlaid with the wear-resistant particles comprises the steps of preparing a composite plating solution with a concentration of chromic anhydride being 200-400 g / L, a concentration of sulfuric acid being 2-6 g / L, a concentration of benzoic acid being 4-10 g / L and 100-130 g / L of the wear-resistant particles; forming a hard chrome layer on the surface of the piston main body by applying a forward current; carrying out reverse etching by applying a backward current, the wear-resistant particles being adsorbed to cracks during the reverse etching process; and repeating the reverse etching process, so that the wear-resistant particles are inlaid in the composite plating layer. The composite coating piston ring inlaid with the wear-resistant particles has good wear-resistant performance, high oil storage property and long service life. The production method provided by the invention is simple in operations and is stable.

Description

technical field [0001] The invention belongs to the technical field of engines, and in particular relates to a composite coating piston ring inlaid with wear-resistant particles. Background technique [0002] Piston ring is one of the most important parts in the engine. It is mainly used in gasoline engines, diesel engines, construction machinery, water pumps and other internal combustion engines, and its working conditions are very harsh. Usually, the combustion of fuel in the cylinder causes the piston and piston ring assembly to reciprocate, and due to the combustion pressure in the cylinder, the surface of the piston ring and cylinder wall is worn. In order to reduce the wear between the piston ring and the cylinder wall, in addition to adding lubricant, the current widespread treatment method is to chrome-plate the piston ring. However, with the rapid development of the internal combustion engine industry, piston rings require high working temperature, high thermal sho...

AI Technical Summary

Problems solved by technology

However, with the rapid development of the internal combustion engine industry, piston rings require high working temperature, large thermal shock, high speed, long life, and frequent friction. The traditional single-material surface treatment method for piston rings can no longer meet the needs

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