Machining process of wear-resistant and corrosion-resistant high-precision bearings for rail transit

Abstract

The invention discloses a machining process for wear-resistant and corrosion-resistant high-precision bearings for rail transit. The machining process includes the following steps of (1), selection ofblanks; (2) segmental heating of the blanks; (3) high-speed forging of the blanks; (4) spheroidizing annealing; (5) surface treatment of semi-finished bearings; (6) spraying of primary bearings; (7)ring rolling diameter setting; (8) cleaning treatment. The machining process improves the properties of high hardness, wear resistance, corrosion resistance and high precision of bearings, increases the cleanliness of the bearings, prolongs the service life of the bearings, meets the requirement for high precision level of the bearings and facilitates mass production, raw material preparation is reasonable and scientific, the reliability of the bearings can be significantly improved, and the machining process has great practicality and promotional value.

Description

technical field [0001] The invention relates to the technical field of bearing processing, in particular to a processing technology for wear-resistant, corrosion-resistant and high-precision bearings used in rail transit. Background technique [0002] Bearings are components that fix and reduce the friction coefficient of loads during mechanical transmission. It can also be said that when other parts move relative to each other on the shaft, it is used to reduce the friction coefficient in the process of power transmission and keep the center of the shaft fixed. Bearings are an important part of modern mechanical equipment. Its main function is to support the mechanical rotating body to reduce the friction coefficient of the mechanical load during the transmission process of the equipment. [0003] In order to improve the bearing capacity of rolling bearings, existing low-speed, high-temperature rolling bearings are full-complement rolling element structures without cages,...

AI Technical Summary

Problems solved by technology

Domestic research on the series and properties of high-entropy alloys is limited. In the design of AlCrCuFeNi-based high-entropy alloy coating materials, the impact of specific elements on the performance of this series of high-entropy alloys is lacking, and the addition of new elements cannot be determined. The influence of layer material on the performance of the bearing surface coating, the service life and fatigue resistance of the bearing are difficult to be fundamentally solved