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

Erin Boyle; Derek O. Northwood; Randy Bowers; Xichen Sun; Peter Bauerle

doi:10.4271/2008-01-1422

2008-04-14

Microstructural Effects on Residual Stress, Retained Austenite, and Case Depth of Carburized Automotive Steels 2008-01-1422

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.

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Microstructural Effects on Residual Stress, Retained Austenite, and Case Depth of Carburized Automotive Steels 2008-01-1422

SAE MOBILUS