Development of 5280 Rolling Bearing Steel for Improved Performance and Productivity

2009 ◽  
pp. 3-3-24
Author(s):  
PV Dimitry ◽  
PJ McDonough ◽  
G Beck ◽  
R Eberhard ◽  
HW Zock
Keyword(s):  
Rolling Bearing ◽  
Bearing Steel ◽  
Improved Performance

Study on Macro-Morphology of Hard Whirling Chips

2012 ◽  
Vol 499 ◽  
pp. 312-317
Author(s):  
Hong Yu Zhu ◽  
Ying Li
Keyword(s):  
High Efficiency ◽  
Online Monitoring ◽  
Rolling Bearing ◽  
Bearing Steel ◽  
Advanced Manufacturing Technology ◽  
Advanced Manufacturing ◽  
Machining Parameters ◽  
Essential Difference ◽  
Average Hardness ◽  
Micro Morphology

The technology of hard whirling is a kind of advanced manufacturing technology which integrates high efficiency, high precision and energy saving as a whole and attracts wide attention in machining field around home and abroad. Through studying on experiment of hard whirling machining on rolling bearing steel which has average hardness at 63.5HRC, this article focuses on different understanding of saw-tooth chips, illustrates the essential difference between macro- morphology and micro-morphology of saw-tooth chips, analyzes macro- morphology of saw-tooth chips with their corresponding machining parameters and finally raises a new solution to implement online monitoring on hard whirling machining.

Microstructural Alterations of Rolling—Bearing Steel Undergoing Cyclic Stressing

1966 ◽  
Vol 88 (3) ◽  
pp. 555-565 ◽  
Author(s):  
J. A. Martin ◽  
S. F. Borgese ◽  
A. D. Eberhardt
Keyword(s):  
Shear Stress ◽  
Fatigue Cracking ◽  
Rolling Bearing ◽  
Cyclic Stress ◽  
Bearing Steel ◽  
Rolling Contact ◽  
Microstructural Alterations ◽  
Transmission Electron ◽  
Aisi 52100 ◽  
A Cell

After prolonged cyclic stressing in rolling contact, AISI 52100 bearing steel parts develop extensive regions of microstructural alteration, designated as white etching areas. These are oriented in predictable directions relative to the rolling track. Lenticular carbides are always associated with these areas. Evidence is presented indicating that the boundaries of lenticular carbides constitute planes of weakness which may be preferred planes of fatigue cracking. In the transmission electron microscope the martensitic structure appears gradually transformed into a cell like structure by the action of cyclic stress. The size of crystallites is greatly reduced in this process. The density of microstructural change is found increased with cycling and is distributed in depth along a curve resembling that of the calculated maximum unidirectional shear stress with little or no visible change in the region of maximum orthogonal (alternating) shear stress.

Influence of Rolling Bearing Steel Ball Temperature Deformation on Radial Clearance

2013 ◽  
Vol 275-277 ◽  
pp. 51-55
Author(s):  
Xiao Zeng Wang ◽  
Jiu Hong Yang
Keyword(s):  
Linear Function ◽  
Radial Stress ◽  
Radial Displacement ◽  
Rolling Bearing ◽  
Bearing Steel ◽  
Steel Ball ◽  
Temperature Deformation ◽  
Radial Clearance ◽  
Transient Temperature ◽  
Working Temperature

According to theory of thermoelasticity, the paper deduces the formulas of the rolling bearing steel ball transient temperature, radial stress, tangential stress, radial displacement, and radial clearance, analyzes the influence of the temperature deformation on the radial clearance. The result shows that the radial displacement changes slowly on the surface, reaches the maximum when temperature becomes stable. The reduction value of the radial clearance is the linear function of the temperature and position. Fitness formula is adopted to calculate the radial clearance in the different temperature and radius. The error is less than 0.2% and 0.18%. The radial clearance formula is used to calculate the bearing’s maximum working temperature when the radial clearance reaches the standard radial clearance to ensure the reliable work of the bearing.

scholarly journals Investigations on Tailored Forming of AISI 52100 as Rolling Bearing Raceway

Metals ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 1363
Author(s):  
Timm Coors ◽  
Maximilian Mildebrath ◽  
Christoph Büdenbender ◽  
Felix Saure ◽  
Mohamad Yusuf Faqiri ◽  
...  
Keyword(s):  
Fatigue Behavior ◽  
Base Material ◽  
Rolling Bearing ◽  
Bearing Steel ◽  
Rolling Contact ◽  
Acoustic Microscopy ◽  
Process Step ◽  
Small Depth ◽  
Aisi 52100 ◽  
Tailored Forming

Hybrid cylindrical roller thrust bearing washers of type 81212 were manufactured by tailored forming. An AISI 1022M base material, featuring a sufficient strength for structural loads, was cladded with the bearing steel AISI 52100 by plasma transferred arc welding (PTA). Though AISI 52100 is generally regarded as non-weldable, it could be applied as a cladding material by adjusting PTA parameters. The cladded parts were investigated after each individual process step and subsequently tested under rolling contact load. Welding defects that could not be completely eliminated by the subsequent hot forming were characterized by means of scanning acoustic microscopy and micrographs. Below the surface, pores with a typical size of ten µm were found to a depth of about 0.45 mm. In the material transition zone and between individual weld seams, larger voids were observed. Grinding of the surface after heat treatment caused compressive residual stresses near the surface with a relatively small depth. Fatigue tests were carried out on an FE8 test rig. Eighty-two percent of the calculated rating life for conventional bearings was achieved. A high failure slope of the Weibull regression was determined. A relationship between the weld defects and the fatigue behavior is likely.

ToF-SIMS analysis of boundary layers formed under zinc-free antiwear

2020 ◽  
Vol 72 (8) ◽  
pp. 1013-1017
Author(s):  
Dennis Mallach ◽  
Florian Pape ◽  
Dieter Lipinsky ◽  
Heinrich F. Arlinghaus
Keyword(s):  
Ionic Liquids ◽  
Chemical Composition ◽  
Peer Review ◽  
Boundary Layers ◽  
Secondary Ion Mass Spectrometry ◽  
Rolling Bearing ◽  
Bearing Steel ◽  
Additive Concentration ◽  
Content Type ◽  
Tof Sims

Purpose The structure and chemical composition of boundary layers built under tribological stress affect the friction and wear of solid-state surfaces in a major way. Therefore, information about the chemical composition of the outermost surface and boundary layer are of great importance. Preliminary time of flight secondary ion mass spectrometry (ToF-SIMS) investigations have shown that metal surfaces that have been immersed at high temperatures in phosphonium phosphate-containing oils contain at least some characteristic signals for phosphate containing anti-wear layers. The purpose of this work is to investigate the influence of additive concentration and oil temperature on the formation of phosphate containing layers. Design/methodology/approach To investigate the formation of phosphate containing layers as a function of temperature, samples of rolling bearing steel 100Cr6 were first heated in a furnace to selected temperatures of 200, 300, 400 and 500 °C, respectively. Then, they were immersed in a model fluid containing ionic liquids as additive in PAO-2 and analysed by ToF-SIMS. Findings 100Cr6 surfaces immersed in trihexyltetradecylphosphonium bis(2-ethylhexyl)phosphate additive oil show characteristic signals of phosphate-like layers at temperatures of 400-500 °C. In addition, characteristic surface signals show a decrease in these ionic liquids at these temperatures. Originality/value Ionic liquids could be an alternative to zinc dialkyldithiophosphates as an oil additive. Targeted investigations under friction load could provide information on whether wear-reducing layers are formed. Peer review The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-10-2019-0436

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