Compositional Optimization of High-Performance Ferritic (HiperFer) Steels—Effect of Niobium and Tungsten Content
Xiuru Fan,
Bernd Kuhn,
Jana Pöpperlová,
Wolfgang Bleck,
Ulrich Krupp
Affiliations
Xiuru Fan
Institute of Energy and Climate Research (IEK), Microstructure and Properties of Materials (IEK-2), Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
Bernd Kuhn
Institute of Energy and Climate Research (IEK), Microstructure and Properties of Materials (IEK-2), Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
Jana Pöpperlová
Steel Institute, RWTH Aachen University (IEHK), Intzestr. 1, 52072 Aachen, Germany
Wolfgang Bleck
Steel Institute, RWTH Aachen University (IEHK), Intzestr. 1, 52072 Aachen, Germany
Ulrich Krupp
Steel Institute, RWTH Aachen University (IEHK), Intzestr. 1, 52072 Aachen, Germany
The combined addition of Nb and W provides increased solid solution and precipitation strengthening by (Fe,Cr,Si)2(Nb,W)-Laves phase particles of ferritic, 17 wt.% Cr stainless high-performance ferritic (HiperFer) steel. Based on alloy modifications and the obtained hardness, tensile, and creep testing results; a new high alloying variant is proposed as a candidate steel for future structural application up to approximately 680 °C in power engineering and the process industry.
