Investigation of the impact of process parameters on the layer formation of AlSi coated boron-manganese steel
He F, Merklein M (2022)
Publication Language: English
Publication Type: Conference contribution, Conference Contribution
Publication year: 2022
Series: IOP Conf. Series: Materials Science and Engineering
Book Volume: 1238
Event location: Lorient
DOI: 10.1088/1757-899X/1238/1/012010
Open Access Link: https://iopscience.iop.org/article/10.1088/1757-899X/1238/1/012010
Abstract
Hot stamping has established itself as a technology for manufacturing safety-relevant
car body components. Its usage has found increased importance due to rising political and social
pressure e.g. for improved fuel conservation. Due to reduced sheet thickness, hot stamping parts
offer lightweight solutions while at the same time providing improved crash performance due to
their high strength. Boron-manganese steel is commonly used in hot stamping processes. Due to
hot scale formation during heat treatment and the subsequent forming process, additional
coatings, typically AlSi-coatings, are applied. Since hot stamped parts are formed at
temperatures of 600 °C to 800 °C no suitable lubricants have yet been found. This leads to
increased friction and severe wear in the process, which negatively affect tool lifetime and
overall part quality. Additionally, process temperatures influence the layer formation and surface
roughness due to diffusion processes. A deeper process understanding is needed to acquire
detailed knowledge of the resulting impact on tribological behavior. Within this study, the effect
of coating thickness on the resulting layer is analyzed by comparing the resulting material
composition and surface roughness. To this end, the layer formation and surface roughness are
analyzed for two different layer thicknesses (AS150 and AS80) in relation to furnace
temperature, holding time and heat up rate. Both are characterized by means of heating
experiments conducted on an annealing furnace. The change in layer composition and surface
roughness are determined via metallographic investigation and tactile measurement. The results
of this study help to improve the process understanding of the tribological conditions within the
hot stamping process and to develop future measures for reducing tool wear
Authors with CRIS profile
Franz He
Institute of Manufacturing Technology
Marion Merklein
Institute of Manufacturing Technology
Related research project(s)
How to cite
APA:
He, F., & Merklein, M. (2022). Investigation of the impact of process parameters on the layer formation of AlSi coated boron-manganese steel. In Proceedings of the International Deep-Drawing Research Group Conference (IDDRG 2022). Lorient, FR.
MLA:
He, Franz, and Marion Merklein. "Investigation of the impact of process parameters on the layer formation of AlSi coated boron-manganese steel." Proceedings of the International Deep-Drawing Research Group Conference (IDDRG 2022), Lorient 2022.
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