Composite surface treatment piston and preparation method thereof

Abstract

The invention belongs to the field of piston processing and relates to piston surface processing, in particular to a composite surface treatment piston and a preparation method thereof. The preparation method comprises two links namely printing an antifriction coating on the piston skirt and tinning the overall piston surface, the composite surface treatment method of printing the antifriction coating on the piston skirt and tinning the overall piston surface is adopted; printing a graphitic layer or a MoS2 layer on the piston skirt effectively prevents piston skirt friction, and tinning the overall piston surface effectively prevents friction between a piston ring groove and a piston ring and friction between a piston land and an air cylinder, so that the corrosion resistance and the anti-attrition lubricity of the piston are enhanced, the anti-seizure property of the air cylinder and the piston is greatly improved, early damage is prevented, the cylinder scoring phenomenon is avoided, a complete machine operates steadily, the failure rate is reduced, and the service life of the complete machine is prolonged.

Description

technical field [0001] The invention belongs to the field of piston processing, and relates to piston surface processing, in particular to a composite surface-treated piston and a preparation method thereof. Background technique [0002] At present, the "blowout" development of the domestic auto market and the full implementation of the National III emission standards, especially the strengthening of the state's policy support for cars with a small displacement below 1.6L, domestic cars are facing huge opportunities for development. As a power source, the engine plays a decisive role in the environmental protection and energy saving of automobiles. With the introduction and implementation of my country's environmental protection policies, automobile engines have put forward higher requirements for various indicators of pistons. Therefore, it is necessary to study "low-emission" , "Energy-saving" pistons are developed to reduce the emission of exhaust pollutants from the engin...

AI Technical Summary

Problems solved by technology

The existing piston surface treatment method is a single surface treatment, which cannot meet the deterioration of the piston's use environment, let alone meet the needs of safety, environmental protection, and energy saving

Printing molybdenum disulfide on the skirt alone can only prevent the friction between the skirt and the cylinder wall, but cannot effectively protect the ring groove; the overall tin plating alone can protect the ring groove, but the normal use of the engine will Piston skirt and cylinder wall are not protected