Application of laser boning technology in ship cylinder sleeves

Abstract

The invention provides application of a laser boning technology in ship cylinder sleeves, achieving the requirements of high wear resistance, low emission and long service life. The deformation of a cylinder sleeve processed by a laser is 1 / 20 and 1 / 30 of conventional thermal treatment deformation, so that the original state of the cylinder sleeve before laser processing and better sealing and matching performance with a piston and a piston ring are basically kept; a temperature for heating metal by laser radiation is (3-5)*103DEG C / S, the heating speed is over ten times of the conventional heating mode, the cylinder sleeve can be cooled down depending on heat conduction per se at a speed of 900 DEG C / S which is faster than the cooling speed of conventional quenching mediums. Because a laser quenching structure is different from a conventional quenching structure, the temperature of the laser quenching structure deceases progressively from the surface to the core part thereof, thereby obtaining an ideal structure state; the maximum hardness value of the laser quenching is HRC66, which is higher than the conventional quenching hardness value of HRC54, and the depth of a quenching layer is between 3mm and 3.5mm, which enables the inner surface of the cylinder sleeve to satisfy the high wear resistance requirement; the laser quenching consists of a spiral form and a reticulated form; and the width of a hardening belt is larger than that of a softening belt, and the width of a common hardening belt is between 2mm and 2.5mm.

Description

technical field [0001] The invention relates to the application of laser honing technology in cylinder liners. It specifically involves the application of laser honing technology in marine cylinder liners to meet the requirements of high wear resistance, low emission and long life. Background technique [0002] In today's world engine gas, the method used for the final processing of the working surface of the cylinder liner is honing. Usually, secondary honing (rough honing and fine honing) or triple honing is performed after fine boring, that is, platform honing is performed on the basis of secondary honing. From a tribological point of view, the platform texturing technique that is difficult to control is preferred. The general engine cylinder liner inner surface platform texture method must have inhomogeneity, which cannot achieve the uniform distribution of lubricating oil on the cylinder liner surface, so it is difficult to pre-calculate the matching situation related...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the deficiency of the current platform texture on the surface of the marine engine cylinder liner, which cannot meet the needs of modern engines, the invention provides an application of laser honing technology in the marine cylinder liner, which combines laser and honing technology

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