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Microstructural Effects on Residual Stress, Retained Austenite, and Case Depth of Carburized Automotive Steels

Journal Article
2008-01-1422
ISSN: 1946-3979, e-ISSN: 1946-3987
Published April 14, 2008 by SAE International in United States
Microstructural Effects on Residual Stress, Retained Austenite, and Case Depth of Carburized Automotive Steels
Sector:
Citation: Boyle, E., Northwood, D., Bowers, R., Sun, X. et al., "Microstructural Effects on Residual Stress, Retained Austenite, and Case Depth of Carburized Automotive Steels," SAE Int. J. Mater. Manf. 1(1):697-708, 2009, https://doi.org/10.4271/2008-01-1422.
Language: English

Abstract:

SAE 8620 and other steels are typically used in the carburized condition for powertrain applications in the automotive industry, i.e., differential ring gears, camshafts, and transmission gears. Although current recommended carburizing practice involves normalizing the steel prior to carburizing, elimination of this normalizing treatment could lead to significant cost reductions. This research examines whether the normalizing process prior to carburizing could be eliminated without negatively affecting part performance. This study focused on the effects of the initial microstructure on the residual stress, retained austenite, and effective case depths of carburized SAE 8620 and PS-18 steels.