China's continuous development is actually to allow us to have more advantageous use, and at present, the strength of the mainland in all aspects is steadily improving, and there are some different manifestations in the same situation. Everyone's impression of China has also begun to become different, strength and engineering manufacturing development advantages, so that we have more possibilities, especially in the manufacture of bearings, manufacturing advantages are also more.
In 22 years, the mainland's domestic bearings have been exported 3.39 billion sets, the use of data means that we will have more and more advantages in industrial manufacturing.
Although China has an advantage in bearings, the high-speed rail bearings used in the mainland still need to be imported, why is this? If we even need to rely on imports for high-speed rail bearings, then why can we have this advantage in the development of bearings? In fact, from the perspective of bearing exports, our bearing form is relatively good, but it can be clearly seen in the price that the gap between us and imported bearings.
China's imported bearings are high-end bearings, China's production and exports are low-end, so the price difference is relatively large, in fact, the production of bearings has always been a high-precision product, it not only needs mathematics, physics and heat treatment in the field of fine processing data support, but also needs strong computer technology to serve.
Although the bearing looks small, but it plays a great role, such as our imported high-speed rail bearings belong to the high-end bearing series, and these high-end bearing main production powers are European and United States.
According to the current data, there are a total of 150,000 bearing products and specifications in the world, and only more than 20,000 can be produced in the mainland. Although China is a big country with bearings, it still takes a long time to make it a strong country. High-speed rail is a focus of international development, and China's high-speed rail manufacturing speed is also very fast, but if we can't solve the problem in the bearing, then in the follow-up application, it may also be limited.
At present, China still needs to import the bearings needed for high-speed rail, in fact, it is also for many guarantees. At present, the speed of high-speed rail in mainland China has exceeded 140 kilometers per hour, and such data needs more high-end bearings to have more safety protection.
So why in such a long period of development, China still can't make high-end bearings? In terms of industrial manufacturing, China has been promoting, so we also have a lot of technology, but mainland enterprises have no way to undertake the manufacture of high-end bearings. The main reason is the problem of steel, the steel design of the bearing is to ensure the temperature of the bearing as much as possible, and at the same time to ensure the hardness and strength of the steel.
In this case, the basic elements of the required bearing steel are heat, hardness and wear resistance, and it is difficult to run for China's current technology to meet such steels.
In the use of bearing steel, China has also been monopolized by other countries, so these bearing giants are accustomed to purchase low-end from China, and then sell to us through high-end bearings, China knows the middleman price difference, but because we are not as good as others, so it is difficult to maintain such a balance.
This most common bearing is quite different from China's current internal use, so this must also make everyone understand the gap between China and other countries in industrial manufacturing.
In order to break through this limitation, a lot of efforts have been made, and scientists have known that adding an appropriate amount of rare earth in high-end bearings can increase the performance of steel, but when to add how much, these means have not yet been completely broken. For China, this is another neck technology, and at the same time, in addition to breaking through the problem of high-end bearings, we also need to make continuous breakthroughs in welding technology and ultra-precision machining.
The surface polishing of high-end bearings needs to be like a mirror, but because the working environment of the bearing is very severe, each part needs to withstand the unit pressure and high intensity data, so this is also the reason why it is difficult for China to develop, but many people feel that some breakthroughs that may be difficult to achieve in China are really impossible to complete.
But judging from the previous development, as long as we are given enough time, we will definitely be able to break through. In fact, about the manufacture of bearings, we have made a breakthrough, so from the low-end to the high-end, it only takes time, coupled with China's current continuous advancement of technology, which means that we will have more possibilities, so in the end we are looking forward to the final application.