Application of laser heat treatment technology in marine diesel cylinder liner

Abstract

The invention relates to application of a laser heat treatment technology in a cylinder sleeve of a marine diesel engine, in particular to application of a laser heat treatment technology in the configuration of a large-scale ocean marine diesel engine, that is a laser irradiation quenching technology is adopted to carry out heat treatment on the inner furnace of the cylinder sleeve of the marine diesel engineer so that the surface of the inner wall of the cylinder sleeve obtains a hardening layer with certain hardness and depth and improves the wearing resistance and the anti-cavitation property of the inner wall of an oil cylinder; the deformation amount of laser treatment is between 1 / 20 and 1 / 30 of the deformation amount of the prior heat treatment; the deformation amount is small, basically keeps the original state of the cylinder sleeve before quenching and has good sealing and pair matching performances with a piston ring; the largest hardness value of laser quenching is HRC66 and is higher than the hardness value HRC54 after the prior quenching; the depth of a quenching layer reaches between 3 and 3.5 millimeters, and the width is between 2 and 2.5 millimeters; therefore, the cylinder sleeve reaches the requirements on high wearing resistance and anti-cavitation property.

Description

technical field [0001] The invention relates to the application of a laser heat treatment technology in a cylinder liner of a marine diesel engine, and is especially suitable for the configuration of a large ocean-going ship diesel engine. Background technique [0002] The traditional low-alloy cast iron and alloy cast iron marine diesel engine cylinder liner, after a period of use, the wear of the inner hole increases, a large gap occurs between the cylinder wall and the piston, and the seal is not tight, resulting in leakage and a decrease in engine power. In severe cases, the working performance will be lost, and the anti-cavitation performance is poor. Once the cylinder liner is broken down by cavitation, it will cause accidents. Contents of the invention [0003] The invention uses laser radiation quenching technology to heat-treat the inner surface of the cylinder liner of the marine diesel engine, so that the surface of the inner wall of the cylinder liner obtains a...

AI Technical Summary

Problems solved by technology

[0002] The traditional low-alloy cast iron and alloy cast iron marine diesel engine cylinder liner, after a period of use, the wear of the inner hole increases, a large gap occurs between the cylinder wall and the piston, and the seal is not tight, resulting in leakage and a decrease in engine power. In severe cases, the working performance will be lost, and the anti-cavitation performance is poor. Once the cylinder liner is broken down by cavitation, it will cause accidents

Images