What are the rolling bearing steel selection principle

Bearing is an important part in mechanical equipment, has been widely used in our life, has many kinds of rolling bearing manufacturer of bearing, bearing can be divided into rolling bearing and sliding bearing, roller bearing steel selection principle of what? Rolling bearing manufacturers choose according to bearing working conditions: 1, the working temperature, bearing temperature, using chromium bearing steel. Working temperature higher than 150 ℃ lower than 250 ℃ using chromium bearing steel, also to go through a special heat treatment ( 200 ℃ or 300 ℃ tempering) 。 2, under impact load, the size of the bear strong impact load bearing, generally do not use chromium bearing steel, most high quality carburizing steel, resistant to shock tool steel or quenched and tempered steels. 3, contact medium, used in corrosive medium bearing must be used with good corrosion resistance of corrosion resistant steel or alloy steel manufacturing. With excellent non-ferrous metal smooth surface quality. Work under high temperature conditions, can use silicon bronze manufacture solid cage, working temperature can reach 315 degrees Celsius; Due to the strength of the aluminum is lower than brass, the proportion of light, and therefore commonly used aluminum and brass cage manufacturing entity, mainly is suitable for the higher speed, weight is lighter, corrosion resistance and other conditions. Made of engineering plastic cage, and has great development in recent years, mainly because it has certain corrosion resistance, good self-lubricating performance, small friction resistance, use convenient, price cheap, easy in manufacturing, but easy to say 'ageing'. Currently widely used reinforced nylon 66, adopted by the temperature in the range of - it can continue to work 40 ~ 120 degrees Celsius. In addition, also should be taken into account when choosing steel grade steel processing performance, supply and domestic resources and so on. Rolling bearing manufacturers high demand for the quality of bearing steel smelting, sulfur, phosphorus, and must be strictly controlled the content and distribution of non-metallic inclusion, because the content and distribution of non-metallic inclusions had a great influence on the service life of bearing steel. The higher the amount of inclusions, the shorter the life. In order to improve the smelting quality, recently has been used and the electroslag remelting furnace smelting, also adopts the vacuum smelting, vacuum consumable refining and other new technology to improve the quality of bearing steel.