The crossed roller bearing is a large type of turntable bearing. With the rapid development of China's automation industry, the bearing industry ushered in a new period of development. At the same time, it also puts forward higher requirements for the comprehensive mechanical properties and life of precision cross roller bearings. In order to meet the continuous improvement of performance, it is still difficult to meet the requirements only by the application of new materials. It is necessary to apply various surface treatment technologies to the surface treatment of bearing forgings to achieve high efficiency, high precision, and long service life of bearings. Among all kinds of bearings, the working conditions of bearings are more severe.
The crossed roller bearing works under high pressure and high speed, and contacts with hot metal repeatedly in the working process. Therefore, the bearing is required to have high heat fatigue resistance, thermal conductivity, wear resistance, corrosion resistance, impact toughness, red hardness, and good accuracy. Therefore, the bearing surface treatment technology requires higher requirements. In recent years, a variety of new bearing surface treatment technologies have been emerging, but generally speaking, they can be divided into the following three categories:
(1) Improvement technology of traditional heat treatment process;
(2) Surface modification technology includes surface thermal diffusion treatment, surface phase transformation strengthening, etc;
(3) Coating technology, including electroless plating, etc.
The traditional heat treatment process of bearing is quenching tempering, and then the surface treatment technology has been developed. Due to the variety of materials that can be used as bearings, the same surface treatment technology and process will produce different effects on different materials. In view of the bearing substrate and surface treatment technology of the substrate pretreatment technology, based on the traditional technology, put forward the suitable processing technology for different bearing materials, so as to improve the bearing performance and prolong the bearing life.
Another development direction of heat treatment technology improvement is to combine the traditional heat treatment process with the advanced surface treatment process to improve the service life of bearings. If the chemical heat treatment method of carbonitriding, combined with the conventional quenching and tempering process of NQN (namely, carbonitriding quenching carbonitriding) composite strengthening, not only can get higher surface hardness, but also increase the effective hardening layer depth, reasonable hardness gradient distribution, tempering stability and corrosion resistance, The surface quality and performance are greatly improved.
Check more types of Crossed Roller Bearings.
Please check the Product Guide to select suitable bearings for your machinery.
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