Über die Lage des Temperaturbereiches der σ-Phase in ferritischen Chromstählen

Abstract

Gefügeuntersuchungen über das Auftreten der σ‐Phase in ferritischen Chromstählen mit 13, 18 und 24% Cr und Zusätzen von Aluminium und/oder Silizium bei Temperaturen bis 900 °C. Festlegung der Grenzen zwischen den Zustandsräumen für die α‐Phase und die α‐Phase + σ‐Phase. Auswirkung eines Zusatzes von Aluminium und/oder Silizium.

Welding Metallurgy of Stainless Steels

“…43. This has been investigated in the binary iron-chromium system by Schuller [62]. 1-3 Influence of silicon to SchUller [62], 4 equilibrium lines to Kubaschewski [5] Of much greater importance is the influence of silicon on the expansion of the sigma phase range.…”

“…The sigma phase range is not only shifted to lower chromium contents but also to higher temperatures. They are discussed in detail in section 4.2.4. According to Schuller [62], in stainless austenitic steels alloying additions of silicon will shift the range of sigma phase precipitation to lower chromium contents and to higher temperatures. As shown in Fig.…”

“…Laves phase, definition of 27,28,136,137, Liquation cracks 144,147 Liquid-solid interface [58][59][60][61][62] Low carbon martensitic steels 179 -mechanical properties of weld metal 182 -metallurgy of welding of 179 -practical welding of 181 -precipitation phenomena 185 Manganese 29 -influence on Fe-Cr-Ni system 29 -influence on hot cracking resistance 30,40,155,156,163,167,168,219,220 -influence on intergranular corrosion attack 114 -influence on nitrogen solubility 30 Martensite transformation of stainless steels 14,97 Martensite transformation of ferritic chromium steels 97-100 Mechanical properties of austenitic-ferritic dissimilar joints 238,239 -of austenitic-ferritic duplex weld metal 194,195 -of ferritic weld metal 176,177 -of fully austenitic weld metal [219][220][221] -of low carbon martensitic weld metal [182][183][184] -of stabilized austenitic weld metal [211][212][213] -of unstabilized austenitic. weld metal 204-206 Metallurgy of welding of austenitic-ferritic dissimilar joints 229 -of austenitic-ferritic duplex steels 186 -of austenitic steels 197 -offerritic steels 172 -of fully austenitic steels 214 -...…”