Browse Publications Technical Papers 2019-01-0522

Development of Strength Distributed Hot Stamp Parts 2019-01-0522

Structural parts, such as the center pillar, are a multiple structure, consisted by layers of the high-strength panels and the high-toughness panels, to control the deformation mode during a crash. If we are able to make this multi-layered structure into one panel, which has different hardness within it, we will be able to make a lightweight panel. In this study, we have developed the method to fabricate a ‘lightweight center pillar’ with the following processes. First, the whole surface of the panel is hardened by quenching in the hot stamp process. Next, certain areas of the panel are softened by the partial tempering. We have found that the temperature zone for softening is between A1 and A3 transformation temperature, and it is easy to perform a rapid and accurate tempering by utilizing the property of 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.


Subscribers can view annotate, and download all of SAE's content. Learn More »


Attention: This item is not yet published. Pre-Order to be notified, via email, when it becomes available.
Members save up to 40% off list price.
Login to see discount.
Special Offer: With TechSelect, you decide what SAE Technical Papers you need, when you need them, and how much you want to pay.