Download or read book Improvement of Rolling Contact Fatigue Life of Carburized Tapered Roller Bearings written by N. Tsushima and published by . This book was released on 1986 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Creative Use of Bearing Steels written by J. J. C. Hoo and published by ASTM International. This book was released on 1993 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: Solicited papers from a November 1991 ASTM symposium on [title] held in San Diego, CA are grouped into seven sections: heat treatment carburizing and through-hardening; surface modification; powder metallurgy; corrosion resistant bearing steels; new bearing steels; improvement of rolling contact fat
Download or read book Bearing Steels written by J. J. C. Hoo and published by ASTM International. This book was released on 1998 with total page 517 pages. Available in PDF, EPUB and Kindle. Book excerpt: The proceedings of a November 1996 conference in New Orleans, update previous information and present new materials and processing relating to steel for the anti-friction bearing industry. Among other subjects, they cover steel cleanliness and measuring methods, bearing fatigue life, advanced steel
Download or read book Improvement of the Rolling Contact Fatigue Resistance in Bearing Steels by Adjusting the Composition of Oxide Inclusions written by Tomoko Sugimura and published by . This book was released on 2014 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: Improvements in the rolling contact fatigue resistance of bearing steels need to be made, and various researches to achieve this have been implemented. It is particularly important that, among the non-metallic inclusions, the quantity of large-size oxide inclusions be reduced. Therefore, studies looking at minimizing oxide inclusions have been carried out. More recently, however, a new approach to improving the rolling contact fatigue resistance, different from previous methods, has been undertaken. It has been reported that the condition of the contact at the interfaces between the matrix and non-metallic inclusions is important because it affects the stress state around the inclusions, and that this condition needs to be considered to improve the fatigue resistance of bearing steel. In this paper, to develop bearing steel with a rolling fatigue life better than is currently the case, the relationship between the rolling contact fatigue resistance and the composition of oxide inclusions is investigated. By controlling the composition of the oxide inclusions, fatigue failure was avoided in a thrust-type rolling contact fatigue test, and the fatigue life (L10) achieved was greater than 200 million revolutions. The reason for this improvement is considered to be the absence of voids at the interface between the matrix and the non-metallic inclusions, which would otherwise have a negative effect on the fatigue life.
Download or read book Bearing Steels written by J. J. C. Hoo and published by ASTM International. This book was released on 1975 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rolling Bearing Tribology written by Gary L. Doll and published by Elsevier. This book was released on 2022-08-20 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rolling Bearing Tribology: Tribology and Failure Modes of Rolling Element Bearings discusses these machine elements that are used to accommodate motion on or about shafts in mechanical systems, with ball bearings, cylindrical roller bearings, spherical roller bearings, and tapered roller bearings reviewed. Each bearing type experiences different kinds of motion and forces with their respective raceway, retainers and guiding flanges. The material in this book identifies the tribology of the major bearing types and how that tribology depends upon materials, surfaces and lubrication. In addition, the book describes the best practices to mitigate common failure modes of rolling element bearings. - Discusses important tribological implications surrounding the performance and durability of rolling element bearings - Describes how the different types of roller bearings work - Explores the reasons behind the failure of roller bearings and presents information on how to mitigate those failures
Download or read book ASM Handbook Fatigue and fracture written by ASM International. Handbook Committee and published by . This book was released on 1990 with total page 1080 pages. Available in PDF, EPUB and Kindle. Book excerpt: These volumes cover the properties, processing, and applications of metals and nonmetallic engineering materials. They are designed to provide the authoritative information and data necessary for the appropriate selection of materials to meet critical design and performance criteria.
Download or read book Comparison in Rolling Contact Fatigue Life Between Recent Clean Through Hardening Steels and Carburizing Steels written by N. Tsushima and published by . This book was released on 1993 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rolling contact fatigue lives of through-hardening steels and carburizing steels are getting close if compared with regard to 10% life. However, carburizing steels are more reliable than through-hardening steels because they have longer life with regard to 1% life. In this way, carburizing steels show superiority to through-hardening steels under lubrication conditions less contaminated. However, they lose their superiority when used under contaminated lubrication or high loading conditions. To increase rolling contact fatigue life of carburizing steels, it is effective to increase case depth. By increasing case depth, the life of a carburized bearing increased significantly under clean oil lubrication as well as under contaminated lubrication and high loading conditions.
Download or read book Annual Index abstracts of SAE Technical Papers written by and published by . This book was released on 1995 with total page 692 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rolling contact Fatigue Resistance of Hard Coatings on Bearing Steels written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Ball- and roller-bearings of the 21st Century are expected to perform better and last longer while operating under more stringent conditions than before. To meet these great expectations, researchers have been constantly exploring new bearing designs or refining existing ones, optimizing microstructure and chemistry of bearing materials, and alternatively, they have been considering the use of thin hard coatings for improved bearing performance and durability. Already, some laboratory tests have demonstrated that hard nitride, carbide (such as TiN, TiC, etc.) and diamondlike carbon (DLC) coatings can be very effective in prolonging the fatigue lives of bearing steels. This paper provides an overview of the recent developments in hard coatings for bearing applications. Previous studies have demonstrated that thin, hard coatings can effectively prolong the fatigue lives of bearing steel substrates. In particular, thinner hard coatings (i.e., 0.2 - 1[micro]m thick) provide exceptional improvements in the fatigue lives of bearing steel substrates. In contrast, thicker hard coatings suffer micro fracture and delamination when tested under high contact stresses, hence are ineffective and may even have a negative effect on bearing life. Overall, it was concluded that thin hard coatings may offer new possibilities for bearing industry in meeting the performance and durability needs of the 21st Century.
Download or read book ASM Handbook written by and published by . This book was released on 1990 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Improvement of Rolling Contact Fatigue Life of Bearing Steels written by Hiroshi Kashimura and published by . This book was released on 1984 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Factors that Affect Rolling Contact Fatigue Life of Ceramics and Rolling Contact Fatigue Life of Ceramic Balls and Rollers written by Y. Nishihara and published by . This book was released on 1990 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The rolling contact fatigue life of ceramics for rolling bearings has improved remarkably in recent years, and is now superior to that of bearing steels. This paper describes experiments to investigate the influence of manufacturing process variables on rolling contact fatigue life and compares the rolling contact fatigue life of current improved ceramics with bearing steels.
Download or read book Fatigue Limit Stress A New and Superior Criterion for Life Rating of Rolling Bearing Materials written by TA. Harris and published by . This book was released on 2002 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rolling bearings are rated for their capabilities to withstand rolling contact fatigue. All other means of bearing failure are considered preventable through proper attention to bearing manufacture, mounting, lubrication, and minimization of contaminant ingress. The standard methods for calculation of rolling bearing capacities and fatigue lives are based on the 1947 and 1952 publications of Lundberg and Palmgren. They defined separate material factors for ball bearings and roller bearings fabricated from 52100 steel, through-hardened to at least 58 Rockwell C; the fatigue life predictions, were strongly influenced by these capacity-multiplying factors. The standard was in use for less than five years, when it became apparent bearings fabricated from ever-cleaner materials; for example vacuum degassed and vacuum melted steels, were out-performing standard life predictions. Moreover, tapered and cylindrical roller bearings routinely fabricated from carburizing steels such as SAE 4118, 4320, 8620, etc. were not directly covered by the standards. This deficiency is accommodated by the use of material-life factors applied to the Lundberg-Palmgren life equations. The Society of Tribologists and Lubrication Engineers (STLE) recommends the use of separate material-life factors to cover basic steel metallurgy, heat treatment, and metal shaping. It has been demonstrated that, together with other life factors for lubrication effectiveness and contamination, this cascading of life factors is insufficiently accurate to predict life because in most cases, these effects on bearing endurance are interdependent.
Download or read book The Effect of Ausforming on Rolling Contact Fatigue written by E. N. Bamberger and published by . This book was released on 1963 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt: A development program was conducted on M-50 and VascoJet MA to determine the improvements possible in bearing steels by the incorporation of a hotcold working (ausforming) treatment in their processing. Primary emphasis was on the improvements possible in rolling contact fatigue. In support of this, heat treat, corrosion, hardness and microstructural studies were performed. The ausforming process as applied to the rolling contact fatigue life of M-50 bearing steel will substantially improve life (exceeding 800%). This will be a significant factor in meeting the long life bearing requirements for advanced air breathing propulsion systems. A metallurgical analysis was conducted and a mechanism is proposed which is thought to be the primary factor in providing the significant improvements in rolling contact fatigue life. Evidence is presented which indicates that the life improvement is primarily due to more uniform carbide dispersion, reduction of massive carbide particles, and reduction in martensite platelet size. These microstructural changes are believed to be associated with strain induced precipitation and its interplay with strain hardening during the deformation cycle. (Author).
Download or read book Cumulative Index of The SAE Papers written by Society of Automotive Engineers and published by . This book was released on 1965 with total page 1646 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA Conference Publication written by and published by . This book was released on 1988 with total page 604 pages. Available in PDF, EPUB and Kindle. Book excerpt:
