Induction Hardened Ductile Iron Camshafts

2002-01-0918

03/04/2002

Event
SAE 2002 World Congress & Exhibition
Authors Abstract
Content
The General Motors L850 world engine uses an induction hardened, ductile iron, camshaft. Unlike most induction hardened camshafts that are machined first and then hardened, this camshaft is deep hardened first and then machined. Using this process, the beneficial compressive surface residual stresses are extremely high.
During the development of the L850 camshaft, the casting process was optimized to produce material of sufficient quality to resist quench cracking during the hardening process and to resist mechanical cracking during the machining process. Retained austenite content, residual stress profiles, hardness, microstructure and chemical composition were all characterized and optimized.
This paper reviews the material and process development for this unique automotive application.
Meta TagsDetails
DOI
https://doi.org/10.4271/2002-01-0918
Pages
9
Citation
Druschitz, A., and Thelen, S., "Induction Hardened Ductile Iron Camshafts," SAE Technical Paper 2002-01-0918, 2002, https://doi.org/10.4271/2002-01-0918.
Additional Details
Publisher
Published
Mar 4, 2002
Product Code
2002-01-0918
Content Type
Technical Paper
Language
English