Nitridation and PVD composite coating piston ring with dual-concave-convex opening

Abstract

The invention discloses a nitridation and PVD composite coating piston ring with a dual-concave-convex opening. The structure of the piston ring mainly comprises a base ring (1), a first hardening layer (2) as a nitridation layer, a second hardening layer (3) as a nitridation layer, a PVD coating (4), concave parts (5, 7, 8) and convex parts (6, 9, 10). The composite coating piston ring with dual concave-convex openings is characterized in that two nitridation layers permeate outside the base ring (1); the two nitridation layers comprise the first hardening layer (2) and the second hardening layer (3); the PVD coating (4) is sprayed outside the second hardening layer (3) as the nitridation layer. The piston ring opening adopts a structure with the concave parts (5, 7, 8) and the convex part (6, 9, 10); through the produced piston ring of the dual-concave-convex opening structure, the abrasion resistance and the sealing performance of the piston ring are improved; meanwhile, the harmful gas emitted by the engine is also reduced, so that the purpose of prolonging the service life of the engine is achieved; furthermore, the multi-win situation with economic and social benefits is also achieved.

Description

Technical field: [0001] The invention belongs to a piston ring, an important part of an automobile engine, and specifically relates to a "nitridation" + "PVD" composite coating double concave and convex piston ring. Background technique: [0002] As we all know, with the continuous increase of automobile production and sales, the auto parts industry has also risen to meet the increasing automobile production industry, followed by the aftermarket. The excessive consumption of various resources in the manufacture of automobile engines, and the increasing pollution of the human living environment have also become obstacles to the modernization process, and have also attracted great attention from all countries and experts at all levels in the world. The governments of various countries have also put the rational development and effective utilization of resources and environmental purification into the most important positions in the important work agenda and the development pla...

AI Technical Summary

Problems solved by technology

Therefore, the traditional piston ring opening shape and sealing in the past are far from being able to meet the high sealing and low emission requirements of the current engine.

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