High-power diesel engine cylinder sleeve surface functional phosphating technology

Abstract

The invention discloses a high-power diesel engine cylinder sleeve surface functional phosphating technology. The technology is carried out according to the following processes: hanging, alkaline chemical oil removal, flowing cold water washing, acid washing, flowing cold water washing, activation, phosphating, recycling, flowing cold water washing, hot water washing, drying and acceptance inspection, so that a phosphating film is generated on the surface of a cylinder sleeve. According to the invention, besides the corrosion resistance of the phosphating film, the non-metal phosphating film layer is generated between a cylinder sleeve and a piston ring, the attraction between molecules is reduced, the friction coefficient is reduced, and the purposes of shortening the running-in time and reducing cylinder scoring accidents are achieved. Meanwhile, after the phosphating film is abraded, the thickness of a lubricating oil film is ensured by utilizing the small corrosion holes regularly distributed on the working surface of the inner wall of the cylinder sleeve, the anti-friction performance is continuously exerted, and the effect of prolonging the service life of the cylinder sleeve is achieved.

Description

technical field [0001] The invention relates to a functional phosphating process on the surface of a cylinder liner of a high-power diesel engine, which belongs to the field of surface lubrication of the cylinder liner of a high-power diesel engine. Background technique [0002] After a high-power diesel engine is new or overhauled, there are many microscopic unevennesses on the surface of parts such as cylinder liners, pistons, and piston rings, which make it difficult to form a lubricating oil film and cause high friction. A cylinder accident caused huge losses. [0003] The routine operation at the present stage is to run-in the new engine or the overhauled diesel engine according to the principle of speed from low to high and load from small to large under the condition of good lubrication, and then it can be officially put into use, but this not only increases the running-in time and The purchase cost of oil products is high, and it is also very easy to produce cylinde...

AI Technical Summary

Problems solved by technology

[0002] After a high-power diesel engine is new or overhauled, there are many microscopic unevennesses on the surface of parts such as cylinder liners, pistons, and piston rings, which make it difficult to form a lubricating oil film and cause high friction. Cylinder accident, huge loss

[0003] The routine operation at the present stage is to run-in the new engine or the overhauled diesel engine according to the principle of speed from low to high and load from small to large under the condition of good lubrication, and then it can be officially put into use, but this not only increases the running-in time and The purchase cost of high oil products, and it is also very easy to produce cylinder scuffing in the extremely standardized operation process

[0004] Disadvantages of conventional operation at the present stage: long running-in test period, high risk, and strict operating specifications. Although the purpose of running-in and oil film formation can be achieved, the running-in time is prolonged, the efficiency is reduced, and high-quality lubricating oil is required, and the manufacturing cost increases.

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