Laser surface modelling engine piston ring and preparation method thereof

Abstract

The invention relates to a piston ring of a laser micro-modeling engine and a manufacturing method, in particular to carrying out laser micro-modeling on the upper end surface and the lower end surface of the piston ring; a metallographical organization which has the hardness of HV800-900, is distributed uniformly, consists of micro-pits and is a micro-geometrical structure is obtained after the upper end surface and the lower end surface of the piston ring of the engine are processed by the laser micro-modeling, wherein, the geometric parameters of the micro-geometrical structure are that the radius of the pit is that rp is equal to 20 to 50Mum, the depth of the pit is that hp is equal to 2 to 8Mum, the area occupancy of the pit is that Sp is equal to 5 percent to 15 percent and the distance of the pit is that L is equal to 90 to 230Mum. The invention has the advantages that after the upper end surface and the lower end surface of the piston ring are processed by the laser micro-modeling, the metallographical organization occurs changing, the hardness is improved and the wearing resistance is enhanced; the micro-pits of the upper end surface and the lower end surface of the piston ring store lubricant and wearing particles, improves lubrication and reduces the wearing; the extrusion effect of a lubricating oil film of the pit reduces the break of the piston ring.

Description

technical field [0001] The invention relates to the field of surface treatment of engine piston rings, and is suitable for engine piston rings of motorcycles, automobiles and trains, in particular refers to laser surface modeling engine piston rings that undergo laser surface micro-modelling modification and reshaping treatment on the upper and lower end faces of the piston rings and its preparation method. Background technique [0002] The piston ring is one of the key components of the engine, and its motion is very complicated. It not only performs high-speed and high-frequency reciprocating motion, but also performs circumferential rotation and radial motion in the ring groove. In addition to the corrosion of mechanical load, thermal load and acid oil mist, the main form of piston ring is wear, including the wear of the outer surface of the piston ring and the wear of the upper and lower end faces. The friction between the upper and lower end surfaces of the piston ring...

AI Technical Summary

Problems solved by technology

Although the above methods can improve the wear resistance of the piston ring groove, most of them have complex production processes and equipment, high cost, high labor intensity of workers, and pollution to the environment

In fact, the piston ring-ring groove friction pair is a compatibility problem. Simply increasing the hardness of a certain part is not necessarily beneficial to improving the wear condition of the entire friction pair.

Images