Method for treating M50NiL bearing steel, strengthened M50NiL bearing steel and bearing

Abstract

The invention discloses a method for treating M50NiL bearing steel, strengthened M50NiL bearing steel and a bearing. The method comprises steps as follows: (1) nitrogen ion and carbon ion co-permeation is performed on the surface of the M50NiL bearing steel with ion beams; (2) first rare-earth ions are implanted into the surface of the M50NiL bearing steel obtained in the step (1) with ion beams; (3) second rare-earth ions are implanted into the surface of the M50NiL bearing steel obtained in the step (2) with ion beams; (4) implantation treatment is performed on the M50NiL bearing steel obtained in the step (3) with ion beams; (5) metal ions and gas ions are alternately implanted into the surface of the M50NiL bearing steel obtained in the step (4) with ion beams, so that the strengthened M50NiL bearing steel is obtained. With the method, the wear resistance and the contact fatigue resistance of the M50NiL bearing steel can be remarkably improved, implantation and low-energy bombardment diffusion permeation treatment are completed once with the method, environmental pollution and high energy consumption caused by traditional heat treatment are obviously reduced, and the treatment efficiency is improved.

Description

technical field [0001] The invention belongs to the field of surface strengthening treatment of metal materials. Specifically, the invention relates to a method for treating M50NiL bearing steel, strengthening the M50NiL bearing steel and bearings. Background technique [0002] Compared with the traditional bearing steel M50 steel, the composition of M50NiL steel reduces the content of C element, increases the alloy element Ni, and adds many other types of alloy elements, such as Mn, Mo, among which Ni element improves the toughness of the core and Increase the fracture resistance, so it is a high-temperature bearing material widely used in aerospace bearings. Due to the fact that the current service conditions of the bearings used in the aviation industry are getting worse and worse, and they work under severe conditions such as heavy loads, high speeds, and high temperatures, so higher requirements are placed on the mechanical properties of materials. Compared with ordinar...

AI Technical Summary

Problems solved by technology

Due to the fact that the current service conditions of the bearings used in the aviation industry are getting worse and worse, and they work under severe conditions such as heavy loads, high speeds, and high temperatures, so higher requirements are placed on the mechanical properties of materials. Compared with ordinary bearings, M50NiL The bearing material has high temperature resistance, but because the material contains more nickel, the strength and contact fatigue resistance of the bearing still cannot meet the bearing performance requirements under heavy load and high-speed high-temperature conditions

Images