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Development of high thermal conductivity steels

Date: 02.05.2016
Time: 3:15 p.m.
Place: ICAMS Advanced Discussions 2016, Bochum, Germany

Sebastian Weber, Bergische Universität Wuppertal, Solingen, Germany

For weight saving purposes, body parts of modern cars are partly made of high strength steels. In this context, an increasing fraction of sheet steel is produced by hot metal forming, also known as press hardening. This work is not focused on the automotive parts and the steels they are made of but the tools which are necessary for the press hardening process. These have to be optimized with respect to hardening capacity, hardness penetration, abrasive wear resistance and thermal conductivity to maximize service life. Two aspects will be emphasized: First, the basics of thermal conductivity of iron base systems and second, the development of a novel tool steel for hot pressing tools. It is shown that a sole optimization regarding high thermal conductivity is insufficient. Instead, the influence of heat treatment must be considered for both, mechanical and thermophysical properties.

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