High abrasion-proof steel piston ring and its production technique

Abstract

The invention relates to a high wearing steel piston and the manufacturing technology of the piston. The high wearing steel piston is the important part of the engine, which belongs to the field of piston ring technology. The invention applies vacuum arcstrike electric arc to an excite chrome target or a titanium target to coat the external surface of the pretreated layer of the steel body with exterior multi-element and multi-layer Nano film. As chromium nitride is available for preparing thicker coat, therefore, the first layer or the outmost layer with chromium nitride is coated to the gain multi-element and multi-layer coat with total thickness of 4 to10 Mu m and hardness of 300 to 2800HV, which has controllable film layer micro-hardness, better matching to cylinder casing, good tearing performance and higher film base combination. In addition, a molybdenum disulphide layer is coated in an electro-phoretic painting way or a polytetrafluoroethylene soft layer is coated in a spray painting way to facilitate running-in period. The method is applicable to manufacture various steel rings for the engine, has the advantage of excellent abrasive resistance and is widely suitable for the engines of a car, a light automobile, a heavy automobile and an engineering machine and so on.

Description

technical field [0001] The invention relates to a high wear-resistant steel piston ring and a manufacturing process. The high wear-resistant steel piston ring is an important part of an engine and belongs to the technical field of piston rings. Background technique [0002] Steel piston ring is an important part of the engine. The wear resistance of the piston ring is of great significance to ensure the working performance of the engine, prolong its operating life and reduce maintenance costs. Steel rings have higher mechanical strength and heat resistance than cast iron rings, resulting in stable performance. The use of the steel ring can ensure that the engine has better power, economy, and environmental protection, and can greatly improve the strengthening degree of the engine. The disadvantage of steel rings is mainly lower wear resistance. At present, most of them are overcome by forming a nitride layer on the stainless steel substrate. [0003] After retrieval, the ...

AI Technical Summary

Problems solved by technology

[0005] The above two patented technologies have relatively thin film layers, and the film layer structure is a single-layer film or a composite film, and there is no soft coating on the surface, which is still insufficient in application.

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