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/*728*90 created on 2018/5/16*/ var cpro_id = "u3440131"; Home>Bearing knowledge> Bearing demand for steel Bearing requirements for steel
First, touch the fatigue strength of the bearing under the effect of periodic load; touch the appearance is easy to suffer fatigue damage; that is, the crack is off; this is the primary damage of the bearing. Therefore; in order to improve the service life of the bearing; bearing steel is necessary to have very High touch fatigue strength. /*250*250 was created on 2017/12/25*/ var cpro_id = 'u3171089';
Second, the wear-resistant function of the bearing operation; not only tumbling friction between the ferrule, the rolling body and the support frame; and also the sliding friction; thus the bearing parts are constantly worn. In order to reduce the wear of the bearing parts; adhere to the bearing accuracy and stability Sexuality; extended service life; bearing steel should have good wear resistance.
Third, hardness and hardness is one of the important qualities of bearing quality; it has a direct impact on the fatigue strength, wear resistance and elastic limit of the touch. The hardness of the bearing steel in the application state usually reaches HRC61~65; High touch fatigue strength and wear resistance.
Fourth, anti-rust function In order to avoid the corrosion and rust of bearing parts and products during processing, storage and application; the demand bearing steel should have outstanding anti-rust function.
5. Processing function The bearing parts are in the production process; many pass cold and hot processing steps are required; in order to satisfy the demand of large quantities, high efficiency and high quality; the bearing steel should have outstanding processing functions. For example; cold and hot forming functions ; cutting processing function; hardenability and so on.
In addition to the above basic requirements, bearing steel should also reach the requirements of proper chemical composition, uniform internal arrangement, less non-metallic inclusions, internal and external defects, and the appearance of decarburization layers not exceeding the regular concentration; these items are in the original data specifications. Clear rules.
Commonly used materials for bearing parts are: high carbon chromium bearing steel, carburized steel (such as 20Cr2Ni4A, 15Mn, 20Cr2MnMoA), high temperature bearing steel (such as Cr4Mo4V, Cr14Mo4, Cr15Mo4V, W18Cr4V), stainless bearing steel (9Cr18, 9Cr18Mo, 1Cr18Ni9Ti) , vacuum degassing steel, anti-magnetic bearing steel, etc.; the most commonly used is high carbon chromium bearing steel. The basic steel grade of high carbon chromium bearing steel is GCr6, GCr9, GCr9SiMn, GCr15, GCr15SiMn; it is used in China's bearing manufacturing industry. The widest and most used steel grade; with outstanding wear resistance and touch fatigue function; has more ambitious processing functions; has certain elasticity and tolerance.
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Bearing requirements for steel
Source: China Bearing Network Time: 2018-07-16