The basic requirements of rolling bearing steel

Rolling bearing ( 轴承) The basic requirement of steel: a, contact fatigue strength of bearing under the action of cyclic load, the contact surface is easy to fatigue failure, namely appear cracked spalling, this is the main bearing damage forms. Therefore, in order to improve the service life of the bearing, bearing steel must have a high contact fatigue strength. Second, the wear-resisting performance bearing work ( 工作) , not only between ring, rolling body and maintains a rolling friction, and sliding friction will occur, so that the bearing parts constantly wear ( A basic type of component failure) 。 Bearing bearing lubrication method, divided into grease lubrication and oil lubrication. In order to make the bearing function well, first of all, to choose suitable for conditions of use, the purpose of lubrication method. If only consider lubrication and oil lubrication. However, grease lubrication can simplify the structure of bearing the surrounding of the special features, compare the pros and cons of grease lubrication and oil lubrication. To reduce the number of bearing parts wear, keep bearing accuracy stability, increase the service life ( 一生) , bearing steel should have good wear resistance, 兴能) 。 Three, hardness hardness is bearing ( 轴承) One of the important quality of quality, the contact fatigue strength, abrasion resistance, elastic limit has a direct impact. The hardness of bearing steel in the condition of using general to achieve HRC61 ~ 65, bearing can get high contact fatigue strength and wear resistance. Four, in order to prevent rust resistance bearing parts and finished products during processing, storage and use of corrosion rust, for bearing steel should have good rust resistance. Five, the processing performance of the bearing parts in the production, 生产) Process, passes through many cold and hot working ( 处理) Process, in order to meet the requirements of mass, high efficiency, high quality, bearing steel should have good processing performance. For example, the cold and hot forming properties, machinability, hardenability, etc. Bearing steel in addition to the above basic requirements, should also reach the appropriate chemical composition, less uniform and internal organization, non-metallic inclusion, internal accord with a standard surface defect and surface decarburization layer does not exceed the prescribed concentration ( 浓度) Requirements, such as the projects are clearly defined in the standard of raw materials. Bearing parts commonly used materials mainly include: high carbon chromium bearing steel, carburized steel ( Such as 20 cr2ni4a, 15 mn, 20 cr2mnmoa) , high temperature ( 高温) Bearing ( 轴承) Steel ( 如Cr4Mo4　　V、Cr14Mo4、Cr15Mo4　　V、W18Cr4V) , stainless bearing ( 轴承) Steel ( 9Cr18、9Cr18M　　O、1Cr18Ni9Ti) Magnetic, vacuum degassing steel, bearing steel, such as one of the most commonly used is high carbon chromium bearing steel. Bearing bearing lubrication method, divided into grease lubrication and oil lubrication. In order to make the bearing function well, first of all, to choose suitable for conditions of use, the purpose of lubrication method. If only consider lubrication and oil lubrication. However, grease lubrication can simplify the structure of bearing the surrounding of the special features, compare the pros and cons of grease lubrication and oil lubrication. Basic steel grade of high carbon chromium bearing steel are GCr6, GCr9, GCr9SiMN, GCr15, GCr15SiMn, it is our country bearing manufacturing ( zhì zào) Industrial purpose and the dosage of the largest steel grade, have good wear resistance and contact fatigue performance, has the ideal processing performance, with a degree of elasticity, Elasticity) And toughness. Bearing steel surface strengthening method for special use ultra clean bearing steel bearing steel chemical composition, the development of standards - code table Basic knowledge of high carbon chromium bearing steel bearing martensite quenching tempering bearing steel refining process non-metallic inclusion behavior research ( 研究) Analysis ( Analyse) Technical analysis: high carbon steel bearing steel forging bearing heat treatment ( 处理) Process ( 技术) Parameters of the BEARING steel internal quality what are the two parts NINGBO SUNTHAI BEARING F& An article on F: rolling bearing the residual magnetic technology under the condition of an article: symbol representation method of rolling bearings