Preparation method for powder metallurgy antifriction bearing

Abstract

The invention discloses a preparation method for a powder metallurgy antifriction bearing. The preparation method comprises the step that 60-65 parts of titanium powder, 15-20 parts of magnesium powder, 10-15 parts of molybdenum disulfide, 10-20 parts of silicon carbide, 3-11 parts of gallium trichloride, 10-15 parts of magnesite powder, 2-8 parts of nanometer silicon nitride, 1-6 parts of hafnium boride, 6-8 parts of phenolic resin, 6-7 parts of cadmium selenide and 12-16 parts of auxiliaries are weighed by weight, wherein the auxiliaries are made of flax seed oil, pentaerythritol triacrylate and polydimethylsiloxane by weight of 3: 5: 6. The powder metallurgy antifriction bearing obtained through the preparation method has higher strength, hardness, abrasion resistance and corrosion resistance than like products on the market, and the service life of alloy parts is prolonged; and raw materials are easy to obtain, the processing cost is low, the preparation technology is simple, parameters are easy to control, the production process is safe and environment-friendly, and the powder metallurgy antifriction bearing is suitable for large-scale industrialized production.

Description

technical field [0001] The invention belongs to the field of powder metallurgy and relates to a preparation method of a powder metallurgy antifriction bearing. technical background [0002] Bearing is an important part of contemporary mechanical equipment. Its main function is to support the mechanical rotating body, reduce the friction coefficient (friction coefficient) during its movement, and ensure its rotation accuracy (accuracy). Under the action of cyclic load, the contact surface of the bearing is prone to fatigue damage, that is, cracking and peeling, which is the main damage mode of the bearing. Therefore, in order to improve the service life of the bearing, the bearing steel must have a high contact fatigue strength. When the bearing is working, not only rolling friction but also sliding friction will occur between the rings, rolling elements and cage, which will cause the bearing parts to wear continuously. In order to reduce the wear of bearing parts, maint...

AI Technical Summary

Problems solved by technology

Nanomaterials can meet the requirements that traditional materials cannot meet. At the same time, the application of nanomaterials can meet the special requirements for material performance in the field of metal processing. However, there are few disclosures about the application of nanomaterials in powder metallurgy technology in the prior art. and immature technology

At present, the main problem in the use of nanomaterials is the agglomeration of nanopowder particle materials, which leads to the particle agglomeration of powder particle materials due to the surface tension of particles during use, which leads to the addition of chemical decomposition agents for agglomeration during use. The decomposition of particles can be used normally, but this will increase the difficulty of use and chemical pollution, while reducing the use efficiency, which limits the application of this nanomaterial in powder metallurgy technology