Microstructure and fatigue strength of the roller-bearing steel 100Cr6 (SAE 52100) after two-step bainitisation and combined bainitic–martensitic heat treatment
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Abstract
Possible processes for shortening the heat treatment of roller-bearing steels in the lower bainitic range were investigated by computer assisted dilatometric experiments and by practical heat treatment process simulations. Several processes were evaluated and used on the steel 100Cr6 (SAE 52100). The microstructures achieved have been investigated by metallography, X-ray analysis and electron microscopy. Influences on hardness, as well as on the fatigue strength were examined. No loss in hardness was achieved and the fatigue strength, determined by rotating bar fatigue tests, was enhanced significantly by the shortened treatments, particularly by the use of the two-step bainitic treatment. The results indicated that small amounts of retained austenite, homogeneously dispersed on a sub-microscopic scale, as obtained during various treatment cycles, have influenced the fatigue strength. By means of the processes evaluated the heat treatment time can be shortened to about 10–25% of the duration of complete bainitisation in the lower range.
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© 2006, Carl Hanser Verlag, München
Articles in the same Issue
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- High thermal stability of mechanically-alloyed nanocrystalline Cu–Nb alloys
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- Microstructure and fatigue strength of the roller-bearing steel 100Cr6 (SAE 52100) after two-step bainitisation and combined bainitic–martensitic heat treatment
- History
- Damage tolerance: fracture mechanics in design
- Description of flow curves over wide ranges of strain rate and temperature
- Mechanismen und Modellierung der Verformung und Schädigung keramischer Faserverbundwerkstoffe
- Notifications
- Personal
Articles in the same Issue
- Contents
- Contents
- Editorial
- Herrn Prof. em. Dr. rer. nat. Dr.-Ing. E. h. mult. Prof. h. c. Dr. h. c. Eckard Macherauch zum 80. Geburtstag
- Basic
- Stability of residual stresses in longitudinally and transversely deep rolled sintered iron under quasistatic and cyclic loading
- Residual stresses in random-planar aluminium/Saffil® short-fibre composites deformed in different loading modes
- Thermal residual stress analysis in continuous Al2O3 fiber reinforced NiAl composites
- On the fatigue behavior of ultrafine-grained interstitial-free steel
- Laser Interference Metallurgy – using interference as a tool for micro/nano structuring
- On dynamic and static strain ageing in Cu-2at.% Mn polycrystals
- High thermal stability of mechanically-alloyed nanocrystalline Cu–Nb alloys
- Possibilities and limits in thermohydrogen processing of beta titanium alloy Timetal®10-2-3
- Applied
- Cube textured tapes for use in YBa2Cu3O7–δ-coated conductor applications
- Cavitation erosion of advanced ceramics in water
- Influence of tension–compression loading history on plastic deformation of Mg wrought alloy AZ31
- Microstructure and mechanical properties of the extruded Mg-alloys AZ31, AZ61, AZ80
- Mechanical properties and microstructural changes of ultrafine-grained AA6063T6 during high-cycle fatigue
- Analysis of failure behaviour of carbon/carbon composite made by chemical vapour infiltration considering fibre, matrix and interface properties
- Cooperating twin robots form a new X-ray diffractometer for stress analysis
- Grinding-induced microstructural gradients and residual stresses in the surface layers of carbon steel and pure tungsten
- Residual-stress-induced subsurface crack nucleation in titanium alloys
- Microstructure and fatigue strength of the roller-bearing steel 100Cr6 (SAE 52100) after two-step bainitisation and combined bainitic–martensitic heat treatment
- History
- Damage tolerance: fracture mechanics in design
- Description of flow curves over wide ranges of strain rate and temperature
- Mechanismen und Modellierung der Verformung und Schädigung keramischer Faserverbundwerkstoffe
- Notifications
- Personal