Preparation method of piston ring with nano yttrium aluminum garnet fiber composite coating for internal combustion engine

Abstract

The invention discloses a preparation method of a piston ring with a nano yttrium aluminum garnet fiber composite coating for an internal combustion engine. The method comprises the following specific steps of getting a piston ring matrix ready, preparing a coating material and applying a coat on the surface of the matrix through an atmospheric plasma technique, wherein the piston ring matrix is prepared from the following chemical components in percentages by weight: 0.3 to 0.5 percent of C, 0.5 to 1 percent of Ni, 0.3 to 0.5 percent of Si, 0.03 to 0.05 percent of Y, 0.5 to 1 percent of Li, 0.05 to 0.1 percent of B, 0.05 to 0.1 percent of V and the balance of Fe. Not only the piston ring prepared by the preparation method has high abrasion resistance and high damage resistance performance, but also the coating is high in the bond strength with the matrix and the peeling off of the coating is not liable to occurrence at the same time; and meanwhile, the coating is high in self mechanical strength, high in durability, good in high temperature resistance performance, wide in sphere of application and long in service life.

Description

technical field [0001] The invention relates to a preparation method of a piston ring, in particular to a preparation method of a nano-yttrium aluminum garnet fiber composite coating internal combustion engine piston ring. Background technique [0002] Piston ring is one of the key components of the internal combustion engine. It is a split ring with certain elasticity. It is divided into gas ring and oil ring. The movement conditions of the piston ring are complex, and are often in harsh working environments, so they need to have good wear resistance, corrosion resistance and mechanical properties. With the development of the engine towards high efficiency, high load, high speed and long life, higher requirements are put forward for the durability and reliability of piston rings. [0003] Most of the current piston ring materials are ductile iron and steel, which have poor wear resistance and damage resistance, so surface treatment is required. The current surface treatme...

AI Technical Summary

Problems solved by technology

However, this method has the problem that the bonding strength between the coating and the substrate is not enough, and it is prone to peeling off, which needs to be improved in practical applications.