The relationship between case depth and bending fatigue strength of gas carburized SAE 8620 steel

2007 ◽  
Vol 201 (12) ◽  
pp. 5979-5987 ◽  
Author(s):  
Osman Asi ◽  
Ahmet Çetin Can ◽  
James Pineault ◽  
Mohammed Belassel
Keyword(s):  
Fatigue Strength ◽  
Case Depth ◽  
Bending Fatigue ◽  
Bending Fatigue Strength ◽  
Sae 8620 Steel ◽  
The Relationship

Effects of Side-Face Carburizing, Face Width, Tempering and Intergranular Oxidation on Bending Fatigue Strength of Case-Carburized Gear

2012 ◽  
Author(s):  
Kouitsu Miyachika ◽  
Norimasa Maeta
Keyword(s):  
Fatigue Strength ◽  
Hardened Layer ◽  
Case Depth ◽  
Bending Fatigue ◽  
Face Width ◽  
Intergranular Oxidation ◽  
Bending Fatigue Test ◽  
Side Face ◽  
Bending Fatigue Strength ◽  
Carburized Gear

The hardness measurements of hardened layer, the observation of intergranular oxidation with the SEM and the bending fatigue test for gas and vacuum case-carburized spur gears were carried out, and then profiles of hardened layer, case depth, amount of intergranular oxidation and S-N curves were obtained. Effects of the case depth, the side-face carburizing, the face width, the tempering and the intergranular oxidations on the bending fatigue strength were determined.

Effects of Case Depth, Side-Face Carburizing and Helix Angle on Residual Stress and Bending Fatigue Strength of Case-Carburized Helical Gears

2009 ◽  
Author(s):  
Kouitsu Miyachika ◽  
Kazuaki Ando ◽  
Wei-Dong Xue ◽  
Imaduddin Helmi Bin Wan Nordin
Keyword(s):  
Residual Stress ◽  
Fatigue Strength ◽  
Three Dimensional ◽  
Helix Angle ◽  
Fatigue Tests ◽  
Case Depth ◽  
Bending Fatigue ◽  
Helical Gears ◽  
Side Face ◽  
Bending Fatigue Strength

This paper presents a study on effects of case depth, side-face carburizing and helix angle on the residual stress and the bending fatigue strength of case-carburized helical gears. The carbon content of each element of the FEM gear models due to carburizing was obtained. A heat conduction analysis and an elastic-plastic stress analysis in the case-carburizing process of helical gears were carried out by the three-dimensional finite-element method, and then residual stresses were obtained. Effects of the case depth, the side-face carburizing, the helix angle and the face width on the residual stress of case-carburized helical gears were determined. Bending fatigue tests were carried out for case-carburized helical gears and S-N curves and bending fatigue limit loads were obtained. Effects of the case-depth, the side-face carburizing and the helix angle on the bending fatigue strength of the case-carburized helical gear were determined.

Residual Stress and Bending Fatigue Strength of Case-Carburized Thin-Rimmed Spur Gears With Asymmetric Web Arrangement

2007 ◽  
Author(s):  
Kouitsu Miyachika ◽  
Wei-Dong Xue ◽  
Takao Koide ◽  
Hidefumi Mada ◽  
Kengo Nojima ◽  
...  
Keyword(s):  
Residual Stress ◽  
Fatigue Strength ◽  
Three Dimensional ◽  
Spur Gear ◽  
Fatigue Tests ◽  
Case Depth ◽  
Spur Gears ◽  
3D Fem ◽  
Bending Fatigue ◽  
Bending Fatigue Strength

This paper presents a study on effects of carburized parts on residual stress and bending fatigue strength of case-carburized thin-rimmed spur gears with asymmetric web arrangement. A heat conduction analysis and an elastic-plastic stress analysis for the case-carburizing process of thin-rimmed spur gears with asymmetric web arrangement were carried out by the three-dimensional finite-element method (3D-FEM), and then residual stresses were obtained. Effects of the case depth, the carburized part and the rim thickness on the residual stress of case-carburized thin-rimmed spur gears were determined. Bending fatigue tests were carried out for case-carburized thin-rimmed spur gears with asymmetric web arrangement, and S-N curves and bending fatigue limit loads were obtained. Effects of the case-depth, the carburized part and the rim thickness on the bending fatigue strength of the case-carburized thin-rimmed spur gear with asymmetric web arrangement were determined.

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