Material is the basis of bearing quality. Professional precision angular contact bearing manufacturers teach you how to choose suitable materials. The materials used in the manufacture of bearing parts have a great influence on the reliability and performance of the bearing. When the bearing is running, the rolling surface of the parts is subjected to periodic alternating loads. Since the contact area between the rolling elements and the raceways is very small, it will cause high contact stress on the contact parts. Under the repeated action of this stress, the material of the part will fatigue and eventually lead to fatigue spalling. At the same time, there is not only rolling friction but also sliding friction in the contact parts of parts. Therefore, the selection of precision angular contact bearing materials must have the following properties: excellent wear resistance and corrosion resistance, excellent stability, Excellent machining performance, excellent impact resistance, high contact fatigue strength, high elastic limit, high material purity, high hardness. In order to ensure that the bearings have good quality and high reliability, Sanli's precision angular contact bearings are made of various high-quality materials. The main materials used in bearing manufacturing are: 1.1 Fully hardened steel Generally, the materials for bearing rings and rolling elements are high carbon chromium bearing steels that are hardened overall. Among them, high-carbon chromium bearing steel is one of the materials with the longest application time, the most commonly used and the most comprehensive research in the bearing industry. GCr18Mo steel is a steel type with better impact resistance developed in recent years. The hardness of high-carbon chromium bearing steel can reach 58-65HRC after martensitic or bainite heat treatment. Correspondingly, other performance indicators can also meet the performance requirements of precision angular contact bearings. 1.2 Surface hardened steel For bearings such as railway freight car bearings and rolling mill bearings that will withstand large impact loads during use, and bearings with a relatively large interference during fit, various grades of carburized steel can be used. After surface carburizing and heat treatment, the surface hardness of carburized steel can reach about 60 HRC, while the interior has good toughness (30-35 HRC), which is suitable for occasions with large impact loads. The main grades of carburizing steel used are 20CrNi2MoA, 20Cr2Ni4A, 10CrNi3MoA, 15CrNi4MoA, etc., as well as 40CrMnMo, 50Mn, etc. 1.3 Induction hardened steel Partial surfaces of bearing parts (such as raceways) can be subjected to surface induction hardening, but other surfaces will not be affected by quenching. Therefore, materials in the same part can have different properties. Commonly used induction hardened steel grades are 42CrMo, 50Mn, 5CrMnMo and so on. 1.4 High temperature resistant bearing steel When the working temperature is lower than 120°C, bearings made of high carbon chromium bearing steel or carburized steel can be used. If the working temperature of the bearing is higher than 120°C, special heat treatment is required for stabilization. After stabilization treatment, the maximum working temperature of the material can reach 350°C, but in this case, the bearing capacity, wear resistance and other properties will be reduced. And it is only suitable for short-term operation in high temperature environment. When the working temperature is higher than 350°C or the bearings that work above 250°C for a long time, it is necessary to use high temperature resistant bearing steel materials to manufacture the bearings. Commonly used high temperature resistant bearing steel grades are Cr14Mo4, Cr4Mo4V, W18Cr4V and so on. In addition, if there are other special requirements, stainless steel, corrosion-resistant steel, and high-quality, high-purity bearing steel such as vacuum degassing and electroslag remelting can also be used to manufacture bearings. Precision angular contact bearings made of these materials can meet various individual requirements of customers, but the price of bearings will vary compared with ordinary materials. Only when the torque is accurate can the rotation be stable!
is a modern CONTACT US widely used in Bearing Suppliers industry. It also enhances the quality Hrb Bearing China value of the products.
Helping the needy Bearing Suppliers industries with quality products had been our main goal and we have succeeded in providing simple and effective solutions which has a huge scope to be implemented in the near future. Go to JNSN Bearing to know more about us.
It's the consistent experience that builds trust and loyalty. Creating a personality and platform that is scalable will allow you to evolve CONTACT US with your consumers.