Development of Strength Distributed Hot Stamp Parts
Published April 2, 2019 by SAE International in United States
Downloadable datasets for this paper availableAnnotation of this paper is available
Structural parts, such as the center pillar, are a multi-layer structure. They are a combination of high-strength panels and high-toughness panels, to control the deformation mode during a crash. If we can make this multi-layered structure as one panel, consisting of different hardness within it, we will be able to make a lightweight part. In this study, we have developed a method to fabricate a ‘lightweight center pillar’ with the following processes. First, the whole panel is hardened by quenching within the hot stamp process. Next, certain areas of the panel are softened by partial tempering. We have found that the temperature zone for softening is between A1 and A3, and it is easy to perform a rapid and accurate tempering by utilizing induction heating around the Curie temperature between A1 and A3 transformation temperature.
As a result, we have established the method to fabricate the ‘lightweight center pillar’, that has a higher collision resistant performance, by integrating the high-strength part and the high-toughness part into a single panel.
CitationMiyagawa, S., Niihara, M., and Ihara, T., "Development of Strength Distributed Hot Stamp Parts," SAE Technical Paper 2019-01-0522, 2019, https://doi.org/10.4271/2019-01-0522.
Data Sets - Support Documents
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