Strengthened and toughened in-site reaction-type micro-structure self-lubricating bearing and preparation method thereof

Abstract

The invention discloses a strengthened and toughened in-site reaction-type micro-structure self-lubricating bearing and a preparation method thereof. A matrix of the bearing is made from chromium-containing alloy steel, a cubic boron nitride coating containing PbO, Mo, TiB2, BNNTs, CNTs and graphene is arranged on the surface of the matrix, and the surface of the coating is of a micro-structure; and the coating is prepared through a plasma vacuum spaying method. The self-lubricating bearing prepared through the method has good toughness on the whole, the binding force between the matrix and the coating is high, and boron nitride nanotubes (BNNTs) and carbon nanotubes (CNTs) are added, so that the cubic boron nitride coating on the surface has good toughness and high hardness and wear resistance; and in the working process, the graphene can achieve a lubricating effect when the temperature is low, and when the temperature is high, PbO, Mo and TiB2 are subjected to an in-site reaction togenerate PbMoO4, TiO2 and B2O3 to cooperatively work with the micro-structure to achieve a lubricating effect, so that frictional wear is reduced, and the life of the bearing is prolonged.

Description

Technical field [0001] The invention belongs to the technical field of bearing manufacturing, and particularly relates to a toughened and reinforced in-situ reaction type micro-textured self-lubricating bearing and a preparation method thereof. Background technique [0002] Bearings are very commonly used key parts in the industry. Their basic function is to provide force support and motion conversion for rotating machinery and swing machinery, and to reduce the friction coefficient of the equipment during the transmission process to ensure the normal operation of the equipment. At present, most of the most used bearing materials are metals. The surface hardness of metal materials is relatively low, the coefficient of friction is relatively large, the load-bearing capacity is low, and the wear is more serious. Usually, lubricants are needed in the working process. In order to reduce friction and wear during bearing operation and increase bearing life, a series of new self-lubrica...

AI Technical Summary

Problems solved by technology

At present, most of the bearing materials used are metals. The surface hardness of metal materials is relatively low, the coefficient of friction is large, the bearing capacity is low, and the wear is serious. Lubricants are usually required during the working process.

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