Deutsche Edelstahlwerke GmbH (Siegen, Germany):

Beiler Ch., Mag. Eng., Process development, christof.beiler@dew-stahl.com
Schwartz M., Process development
Jung H.-P., Mag. Eng., Head of Process Development

Deutsche Edelstahlwerke GmbH (Krefeld, Germany):

Ziegelmayer O., Mag. Eng., Head of Melting/Forging

Multiple production methods and equipment allow Deutsche Edelstahlwerke GmbH to represent different levels of purity. In this article the different production methods and equipment are compared using the example of a high-alloy material to identify their influence on the degree of purity. Inert gas ESR facility at Siegen steel plant is shown. Various remelting units are observed (Electro Slag Remel ting (ESR) in Krefeld, Inertgas Electro Slag Remelting (IESU) in Siegen and Vacuum Arc Remelting (VAR) in Krefeld). Production cost of various process routes is analyzed and comparison of K1 figures for the various process routes (CC, ESU+IESU, VAR) at the same degree of deformation is done. Also the degrees of purity for various process routes and various degrees of deformation (where 100% is equal to average value K1 for ESU-B) are also compared. Identified non-metallic inclusions for various process routes are analyzed additionally. The requirements of final customers and the resulting processes and influence parameters are compared.