Take the high-end bearing steel known as the "King of Steel", for example, the production technology of this steel has been monopolized by European and American countries before.
However, after decades of hard work by Chinese researchers, Chinese special steel manufacturers finally broke through the technical blockade and successfully developed and commercialized high-end bearing steel.
High-end bearing steel has to withstand super-strong extrusion, but it is not enough to withstand strong extrusion. High-end bearing steel also has to withstand the friction, ultra-high temperature and centrifugal force generated during high-speed rotation. Bearings in special working environments also Special requirements, such as low temperature resistance, anti-corrosion and anti-magnetic properties. In short, the working environment of the bearing is severe and complicated, and the quality of the bearing steel is extremely demanding.
One of the most important indicators of bearing steel is fatigue life. When most steel companies regard "reducing oxygen content" as the key to improving the fatigue life of bearing steel, China's leading special steel technology group: ZXTG special steel technology group has taken a different approach. Since 2001, a large number of experiments have been carried out, and it is finally found that under the same oxygen content, the fatigue life is also related to the shape and composition of inclusions.
With the support of the Ministry of Science and Technology of China, ZXTG has overcome a series of technologies and finally produced high-end bearing steel with the world's advanced level. After two years of inspection and fatigue life testing, the fatigue life of the continuous casting bearing steel produced by ZXTG reached 1150 hours. It is 2.5 times of European bearing steel.
ZXTG uses continuous casting process to produce bearing steel, and opened up the international market in one fell swoop, becoming the first Chinese steel company to obtain the world's top bearing manufacturer-Sweden's SKF "Green Channel for Purchasing".
ZXTG has also developed into the world's largest bearing steel production and sales special steel company. Its high-end bearing steel has been supplied in large quantities to bearing manufacturers such as Sweden's SKF, Germany's Schaeffler, and Japan's NSK.
Of course, the development of China's high-end bearing steel will not stop there. Not long ago, the last "old problem" in the bearing steel industry, carbide, was also overcome by the team of Professor Liu Dong from Northwestern Polytechnical University. The team "grinds a sword in ten years" and developed 3 "world's first" technologies, one of which is a bearing steel obtained using powerful spinning technology, and its carbide size is only 1/10 of the original size, which greatly improves the bearing The hardness, life and reliability of steel make domestic bearing steel at the top level in the world.