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Stamping and Dentability Evaluation of a Hot Dip Ultra Low Carbon Rephosphorized Bake Hardenable Steel for Exposed Body Panels
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English
Abstract
In an effort to improve the dent resistance of exterior body panels at reduced steel thicknesses, some automobile manufacturers have pursued the application of bake hardenable steels. Unfortunately, bake hardenable steels have only been available as cold rolled or with electro-zinc or electro zinc/iron coatings. This situation has been a deterrent for those automobile manufacturers that prefer the use of hot dip galvanneal coatings. Recently, the interest in hot dip galvanneal bake hardenable steels has led to the investigation and development of this more advanced steel grade. This paper presents the results of a stamping trial and dent testing on three exposed hot dip galvannealed materials; i) Regular Ultra Low Carbon (ULC), ii) Rephosphorized ULC, and iii) Rephosphorized Bake Hardenable ULC steel.
Authors
Citation
Bucklin, P., Bollas, G., LeBlanc, P., and Simanovic, Z., "Stamping and Dentability Evaluation of a Hot Dip Ultra Low Carbon Rephosphorized Bake Hardenable Steel for Exposed Body Panels," SAE Technical Paper 970157, 1997, https://doi.org/10.4271/970157.Also In
References
- McCallum K. Rado L. Petroni J. Shi M. “Achieving Dent Resistance Improvements and Weight Reduction Through Stamping Process Optimization and Steel Substitution” SAE 960025
- DiCello J. George R. “Design Criteria for the Dent Resistance of Auto Panels” SAE 740081 1974