Internal combustion engine piston ring friction surface coating for bio-oil application and preparation method thereof

Abstract

The invention discloses a piston ring friction surface costing for an internal combustion engine applied facing to bio-oil application and a preparation method of the piston ring friction surface costing for the internal combustion engine. The piston ring friction surface costing for the internal combustion engine is made of a Ni-MoS2-GO-P composite. The preparation method adopts a laser-induced piston ring friction surface microtexturing and electroless plating synchronous coating process and is characterized in that when microtexturing on the friction surface of a piston ring is carried out by utilizing a laser induction method, and Ni, MoS2, GO and P deposit on the friction surface of the piston ring at the same time in a specific proportion, thus preparing a coating with good corrosion and abrasion resistance. The piston ring friction surface costing has the advantages that the preparation process is simple and easy to operate, the cost is low, the binding force of the coating and a matrix is strong, grains on the surface of the coating are uniform and controllable, the microtexture three-dimensional morphology and the thickness of the coating are regulated according to the needs, and thus effective protection function of the friction surface of the piston ring of the internal combustion engine in the bio-oil environment is realized.

Description

technical field [0001] The invention belongs to the technical field of metal material surface treatment, in particular to a friction surface coating of an internal combustion engine piston ring with bio-oil as fuel and a preparation method thereof. Background technique [0002] In recent years, bio-oil has attracted widespread attention as an alternative fuel to traditional fossil energy. The reasons mainly include the significant advantages of bio-oil, such as renewable, zero net carbon emissions, and clean and pollution-free. The direct application of bio-oil to internal combustion engines is the research goal of many researchers, but the organic acids in bio-oils will cause corrosion of metal materials in internal combustion engines, especially some organic acids will also be adsorbed on the inner surface of the cylinder liner of internal combustion engines. It is transferred to the friction surface of the piston ring, which will cause serious corrosion to the piston ring...

AI Technical Summary

Problems solved by technology

[0003] The use of coating technology to treat the friction surface of internal combustion engine piston rings is a commonly used method to enhance the wear resistance of piston rings. Among them, the electroplating coating has been strictly limited due to the large pollution, and the electroless plating coating is due to the concentration of the plating solution. Low pollution is relatively small, but the deposition rate of the electroless coating is difficult to accurately control, and the coating grain uniformity is poor. In the environment containing corrosive components, it is prone to corrosion, wear, peeling and failure.

In addition, the use of laser micro-texture is a surface treatment technology for metal materials that has developed well in recent years. The oil storage space of the lubricating medium and the contact state of the friction pair surface can be changed by laser micro-shaping on the surface to improve the friction reduction and wear resistance of the friction pair. However, in the process of laser micro-texturing, the surface of the material will be damaged to a certain extent, which will lead to corrosion of the damaged part in the organic acid environment, resulting in the inability to achieve the original wear resistance.

Chinese patent (ZL200510110437.1) reports a method of laser-induced selective chemical plating, which uses ultraviolet laser selective radiation on the surface of the substrate first, and then performs chemical plating coating. Compared with direct coating, this implementation method increases The process is complicated, which leads to difficulties in practical application; although there are also reports of putting the material into the chemical plating solution and directly utilizing laser radiation for chemical plating, the uniformity of these coatings is poor. In addition, active noble metal elements are also required as active species, resulting in higher cost

It can be seen that these existing technologies are difficult to meet the protection requirements of the internal combustion engine piston ring friction surface under bio-oil service.

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