【 Leading technology 】 The world of the material

【 Leading technology 】 2019 - material world 01 - 10 timken about cool cutting-edge technology, 'the avengers alliance 3' in iron man's latest impressive Mark 50 nanometer armor. Have a strong ability to repair not only, still can change a variety of functions. Although this is a science fiction film, but will also materials science can reach the boundary of the bold and reasonable imagination again. Mark 50 blood side armor iron man armor cool tees in the real world, with the constant development of science and technology today, the material as the foundation of all application development decides the level of a civilization with height. For the base material also decides the future of our research depth. As an important mechanical parts, bearing can be reflected industry one of the representative of the application of materials. With the development of material science, bearing to use smaller volume to deliver more power, more and more power density. Timken as bearing industry leader in the world, one of the secrets of its success from the unremitting research of material science, so to speak. After nearly 120 years of history, timken to grasp more material for the accuracy of the bearing and the influence of the drive system. From this point seems to be more natural and easy to understand why the TIMKEN bearing performance. The position of the bearing material relationship with the performance of the bearing application as the key part of equipment operation, puts forward high requirements on the bearing performance. According to the application conditions to select the suitable materials is the key to ensure the bearing performance. Such as high temperature, cryogenic applications, high impact load application environment, many impurities, high speed application, corrosion atmosphere, etc. The use of harsh environment, we must according to the different application needs to use the appropriate materials and heat treatment process. Bearing steel with the development of science and technology, applied to the bearing material has become increasingly diverse, but for the selection of steel and machining is still the most important factors in decision bearing overall performance. 1, the purity of steel we have calculated the bearing life is based on the fatigue spalling of life of the bearings, and bearing steel purity has direct influence on fatigue spalling. This is because the bearing steel can't be 100% pure, will inevitably exist some non-metallic inclusions, in the process of bearing bearing rotation, produce stress concentration around inclusions, over time, the stress concentration place will produce crack, when the development of crack, raceway surface bearing can produce fatigue spalling. Inclusion crack caused by the source to the fatigue spalling process demonstration shown above for inclusion crack source and eventually lead to the evolution of fatigue spalling, the visible purity has a decisive influence on fatigue life of bearing. And material purity and steel chemical composition, melting method, the hot working processes and so on has the close relation. If too much or non-metallic inclusions size is too big, will lead to materials are prone to fatigue crack source, with the further use of bearing, crack expanding and peeling off eventually. Inclusions and the bearing fatigue life with development of further research on the material, the relation of the life of the bearing quality is realized. In timken, we follow the strict material control standards ( GMQ) And quality management system ( 全面质量管理) , in order to ensure the purity and quality of bearing material, make our bearing can use the most suitable material, the maximum play to the performance of the material. 2, the material of bearing heat treatment process of heat treatment on the market at present mainly include low carbon steel carburizing and high carbon steel hardening. Heat treatment of the ultimate goal is to get a longer fatigue life and geometric structure stability and higher surface hardness meets the requirement of bearing material. Uniformity of organization and the grain size has a crucial influence on the performance of the material. As the authority of the tapered roller bearings, timken for a variety of heat treatment process has a deep research and application. By means of heat treatment process of mature control, make application in bearing heat treatment of materials more uniform and more refined grain size control, be better bearing material physical properties. For general application conditions, we use the hardening treatment of steel as a bearing material, but if more impact load is larger or running environment impurities in the case, we choose carburizing steel, this can ensure the bearing has good impact resistance, and can inhibit bearing damage caused by impurities. According to the different working condition, choosing the most suitable bearing materials is the key to reflect bearing technology. Bearing material diversification in addition to steel, bearing different parts still can choose a variety of different materials. How to make these materials help bearing distinctive show good performance, we also should consider the problem. For example: the inner ring and outer ring of bearing can select multiple types of metal materials; Roller optional metal or ceramic materials; Cage is an optional metal materials, polymer materials, etc. ; Seal the optional metal materials, polymer polymer materials, etc. Although bearing is a kind of standard parts, but the diversity of its internal composition is rich and colorful. Common application of bearing parts material ceramic ball brass cage steel cage all things change, material world is very wonderful. Let these wrapped with innumerable activists materials continue to escort to the progress of human technology. If you want to further understand the relevant information of bearing material, can contact timken engineer.