Manufacturing method of wear-resistant cylinder liner based on surface treatment

Abstract

The invention discloses a method for manufacturing a wear-resistant cylinder liner based on surface treatment, and relates to the technical field of diesel engine accessories. The invention comprises the following steps: pretreatment of the cylinder liner substrate, spraying a 0.03-0.045mm thick TiN bonding layer, preheating, spraying a 0.23-0.26mm thick Cr3C2-NiCr ceramic coating, and heat-treating the workpiece after spraying . The invention uses the wear-resistant surface treatment technology of the alloy to spray ceramic coating on the surface of the cylinder liner substrate, reasonably improves the spraying process, improves the wear resistance of the cylinder liner, prolongs the service life of diesel engine parts, and improves fuel efficiency. The efficiency reduces the emission of sulfur oxides and nitrogen oxides in the exhaust gas of diesel engines, protects the environment and reduces the cost of use.

Description

technical field

[0001] The invention belongs to the technical field of diesel engine accessories, in particular to a method for manufacturing a wear-resistant cylinder liner based on surface treatment. Background technique

[0002] The cylinder liner is the part of the internal combustion engine that works under the worst working conditions. It not only bears strong mechanical and thermal loads, but also is subject to various restrictions on lubrication conditions. Therefore, the service life of the cylinder liner basically determines the overhaul period of the internal combustion engine. The material and casting process of the cylinder liner have an important influence on the selection of surface processing technology and its parameters. When selecting a surface processing technology, various factors must be considered. Otherwise, choosing an improper processing technology will lead to a decrease in the service life of the cylinder liner.

[0003] Laser hardening is only su...