Japanese ball bearing steel development

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Japanese ball bearing steel development

Source: China Bearing Network Time: 2017-09-27
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The ball bearing is mainly selected from the high carbon chromium bearing steel represented by SUJ2. It is mainly used in automobile engine auxiliary machines, transmission systems (transmission, differential equipment) and wheel assemblies in Japan. In these applications; because of miniaturization of automobiles And the need for lightweight; the bearing itself as a component of the car also presents a trend of small-scale and data thinning. In addition, the high-load roller bearing originally used; now also uses the ball bearing of the driving force transmission. Such a change in the type of bearing; the fundamental additional dynamic load (to ensure that the bearing changes 1 million times the load) will be reduced; when used under the same conditions; the bearing life of the bearing will be reduced. The number is reduced to make up; in addition to improving the life of the bearing steel itself; there is no other way. It is well known; a useful way to improve the bearing life in normal conditions is to reduce the non-metallic inclusions of steel as a source of fatigue cracking. The scale of the largest inclusion in the regular area obtained by the method combined with the extreme value statistical method is an important target for judging the bearing life. It can also be found in the figure; even if the inclusions are the same size; the lifespan has an order of magnitude difference; thus; the size of the non-metallic inclusions is not the same as the bearing life target; In the case of rigorous demand; the problem of correcting the bearing life of the bearing is proposed. On the other hand; in order to further reduce the size of the inclusions, the 驮偃哿 枰黾 驮偃哿 郊 郊 郊 郊 郊 郊 郊 郊The nasal dark scorpion asks for the sac. The detachment appearance starting from non-metallic inclusions is a frequently seen appearance; this is an important research topic.
This appearance is related to many elements; it is very difficult to clarify its mechanism through trials and investigations. In this case; at that time; Japan’s new energy source, 芄 芄 芄 芄 芄 NE NE NE NE NE NE NE NE NE NE NE NE NE NE NE NE NE NE NE NE NE NE The joint industry-university project (the project day, 2007-2011); is conducting a basic discussion on the divestiture problem. The characteristics of the seminar are: focusing on the use of computer simulation skills and the latest investigation equipment for visual discussion. Therefore, it is very possible to be based on new ideas; to propose a reasonable long-term bearing method for the bearing. The key points are clarified: the initial shortcomings of the data on the bearing life are determined to be large. Old 恚 恚 鹗艏 鹗艏 鹗艏 镏芪 镏芪 镏芪 傻 @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ 瞥ざ 瞥ざ 瞥ざ 瞥ざ 瞥ざ 瞥ざ 瞥ざ 瞥ざ 瞥ざ 瞥ざ 瞥ざ 瞥ざ 瞥ざThe end of the model will present a new goal for the control of non-metallic inclusions on the bearing life and allow the improved life-viewing approach to be practical.
In addition; in terms of bearings; early peeling images that do not start with non-metallic inclusions are also outstanding. The statement states that typical peeling appearances occur in the communication of generator bearings and pulley pulleys of automotive stepless transmission (CTV) conveyor belts. The representation truly reflects the changes in the layout of the auto parts at that time; the inevitable smooth changes in bearing miniaturization, thickness reduction and layout led to the occurrence of such stripping appearance. The explanation of this stripping representation mechanism is a problem; The method of comparing the effect of hydrogen with the image of large strain processing of metal was selected; the understanding of the mechanism has been developed. The high chromium bearing data is selected and combined with the bearing depiction and smoothing countermeasures; Bearing; it was now commercialized.
In the wheel bearing of the car; except for a part of the roller bearing; fundamentally attributed to the field of ball bearings; the manufacturing method and bearing function of this type of bearing form an inherent skill. However, the replacement of the bearing assembly is presented; the first generation~ The third-generation bearing assembly products are now commercialized. The second- and third-generation flanged track wheels are selected from S53C-based high-frequency quenching and hardening treatment of medium carbon steel. The use of bearing assemblies is reduced. The number of parts of the wheel assembly; at that time; the change in fatigue life and the strength of the flange non-hardened part; progress in bearing miniaturization and lightweighting. The new skills that have been announced are: the use of non-modulated steel Alloying skills to increase the amount of titanium to improve the casting arrangement and use plastic forming processing skills to increase the strength of the method
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