Stainless Austenitic CrMnCN Steels of Superior Strength Part I: Alloy Design and Properties
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The solubility of nitrogen is high in stainless austenite of steels with 18 mass% of Cr and Mn each, but low in the melt. Carbon reveals the opposite behaviour. Instead of producing high nitrogen steels by pressure metallurgy (PHNS), about 1 mass% of C+N is dissolved in the melt at ambient pressure. The new cost-effective C+N steel reaches a yield strength of 600 MPa, a true fracture strength above 2500 MPa and an elongation above 70 %. Conduction electron spin resonance revealed a high concentration of free electrons. Thus, the ductile metallic character of the C+N steel is enhanced, explaining the high product of strength and toughness.
[1] G. Stein,et al. P 2000 - a New Austenitic High Nitrogen Steel for Power Generating Equipment , 1999 .
[2] V. Gavriljuk,et al. The influence of substitutional atoms upon the electron structure of the iron-based transition metal alloys , 1998 .
[3] Ch. Crussard,et al. Contribution à l’étude des transformations des austénites à 12 % Mn , 1957 .