Characterization of Laves phase in Crofer 22 H stainless steel
Zheng-Wen Hsiao1, Bernd Kuhn2, Delphic Chen3
1Department of Materials Science and Engineering, National Cheng-Kung University, Tainan 701, Taiwan.
Abstract:
This study investigated the effect of annealing temperature on the precipitation behavior of Crofer(®) 22 H at 600°C, 700°C, and 800°C. The grain size distribution, precipitate phase identification, and microstructure were analyzed using electron backscatter diffraction (EBSD) and energy dispersive X-ray spectroscopy (EDS). The morphology of Laves phase (Fe,Cr,Si)(2)(Nb,W) precipitates having the Cr(2)Nb structure changed from strip-like to needle-shaped as the annealing temperature was increased. The precipitates of the Laves phase also shifted from the grain boundaries to the grain interiors when the temperature was increased. However, the average grain size (150 μm) of the ferritic matrix did not significantly change at 600°C, 700°C, and 800°C for 10 h.
Related Concept Videos
Mechanical Characteristics of Steel
The tension test is fundamental for determining tensile strength. In this test, a steel specimen is stretched using a gripping device until it breaks. The data collected during this test are used...
Steady, Laminar Flow Between Parallel Plates
Steady, Laminar Flow in Circular Tubes
Phase Diagram
Phase Diagram
Steel Manufacturing
During this smelting process, limestone plays a crucial role by forming slag. Slag captures impurities within the molten iron, such...


