How is the status quo of China's high-end bearings? Has mastered the key foreign technology, Japan and Germany have come to spend money on imports

Straight 10 rotating propeller, as long as the rotating parts will exist a small thing, that is, bearings. Seemingly inconspicuous bearings, but is known as the "joints of high-end products", more is considered to be a measure of a country's industrial strength standards. China's low-end bearings in the production and sales are in the world's leading position, but in the high-end bearings are not much advantage, but after continuous research and development, in recent years, China has also had some breakthroughs in high-end bearings.

As a rotating body and back and forth linear motion of the key support parts is the bearing

　　The role of the bearing is mainly for the mechanical back and forth linear motion or rotating parts to provide support, and when the shaft has other parts of the relative movement, but also in the control of the movement at the same time to maintain the position of the shaft. Bearings are mainly divided into rolling bearings and plain bearings, their main function is to support the rotating body, which also determines a good bearing to have a very high rotary accuracy, and also to ensure that the mechanical efficiency of the object, that is to say, the smaller the friction between the bearing and the shaft, the less vibration, the less heat, the better the bearing. Bearings seem to be very simple, and what makes the high-end bearings are still in the process of breaking through?

High pressures, extreme friction and high temperature corrosion determine the performance of bearings.

Although the expression of the bearing is very simple, but the working environment of the bearing is very serious, due to the high speed rotation of the object, the bearing parts to withstand variable stress, high-frequency role, the general pressure per unit area as high as 1500 to 5000N per square millimeter under the action of these factors, the bearing is very easy to produce stress fatigue, resulting in fatigue spalling, so that the bearing loses its role, at the same time! Rolling bearings also need to withstand centrifugal force, friction, high temperature, corrosion and other factors, which also makes to build good bearings, you have to use good steel.

China has reduced the oxygen content of high-end bearings to less than 5ppm and combined with rare earth manufacturing

　　Bearing steel is good or bad mainly depends on its purity and uniformity, of which purity can be described as the most important, improve the purity of the oxygen content in steel has a great relationship, the unit of oxygen content in steelmaking ppm, high-end bearing steel is required is 5 ppm, foreign developed countries have been able to control the oxygen content of the steel in the 5 ppm or less, China's bearings to build a large output, but the quality is not high, but after more than a decade of efforts, China has Master how to control the oxygen content in the 5ppm below, how to ensure its internal quality of the core technology, in addition to the attack through our researchers, mastered the foreign countries do not want to disclose the secret technology, but also in the steel to add rare earths can make high-quality steel become more "hard".

High-end bearings made in China in recent years, but also gradually exported to Japan and other places!

　　At present, China made high-end bearing steel is also exported to Japan, Sweden and other places, and the fatigue life of high-end bearing steel even more than the same period like Japan, the European bearing steel powerhouse level. China has been able to make good steel, the next thing to do is how to use it in the bearing, high-end bearings also involves materials, design, high-precision machining, with bearings manufacturing and other technical difficulties, there are some cross-disciplines such as fatigue and damage, lubrication, etc., but also so that China's distance from the high-end bearings technology there is still a certain gap. But our country has laid an excellent foundation, the future to catch up with the world's advanced level is just around the corner.