The service life of the bearing length, usually by the material and process of these two factors.
Bearing material to a great extent, determines the service life of bearing, ever bearing metallurgical quality is the main cause of the premature failure of the rolling bearing. Bearing material influence on service life, substantial progress in metallurgical technology, the bearing steel material such as distributed, are improved greatly.
Bearing failure analysis, SKF 608-FANADE Bearing http://www.fagbearings-hk.com/newproduct/SKF-608-bearings-59499.html failure caused by the raw materials ratio has dropped sharply, but the material is the most important reason is still bearing failure, but also the service life of the bearings of the main factors.
Because of the bearing should have long life, high precision, low calorific value, recommend suite, high rigidity, low noise, high abrasion resistance and other characteristics, therefore requires bearing steel should have: high hardness, uniform hardness, high elastic limit, high contact fatigue strength, must toughness, hardenability, in atmospheric corrosion resistance of lubricant. In order to achieve the performance requirements, the uniformity of the chemical composition of bearing steel, non-metallic inclusion content and type, strict carbide particle size and distribution, decarburization, etc.
Bearing steel in general to develop in the direction of high quality, high performance and many varieties. According to the characteristics and application environment of bearing steel is divided into: high carbon chromium bearing steel, high temperature carburizing bearing steel, bearing steel special bearing, stainless bearing steel and special materials.
In order to adapt to high temperature, high speed, high load, corrosion resistance, resistance to radiation, need to develop a series of new type of bearing steel with special performance. To decrease the oxygen content of bearing steel, the development of the vacuum smelting, esr, electron-beam remelting of bearing steel smelting technology. And the mass of bearing steel smelting electric arc furnace smelting, early developed into all kinds of smelting and refining outside the furnace.
At present, the use of early capacity greater than 60 tons + LF/VD and RH refining furnace, continuous casting and rolling process of bearing steel production, in order to achieve the purpose of high quality, high efficiency, low energy consumption. In terms of heat treatment process, from the car type furnace, bell type furnace developed into the continuous controlled atmosphere heat treatment of annealing furnace. At present, the longest continuous type heat treatment furnace is 150 m, processing production of bearing steel spheroidizing stable and uniform, the decarburization layer is small, low energy consumption.
Bearing manufacturing complex, through multi-channel process to obtain the finished product, including forging, heat treatment, turning and grinding process of technology capability and complete quality will influence the service life of bearing and its application effect, especially in heat treatment and grinding process, but also a lot of bearing the proximate cause of the failure to get production enterprise attaches great importance to.