Effect of Niobium on Nitrogen Solubility in High Chromium Steel.

• Lee Sang-Beom

  Pohang University of Science and Technology

• Jung Myung-Chae

  POSCO

• Song Hyoseok

  POSCO

• Rhee Chang-Hee

  Pohang University of Science and Technology

Abstract

The interaction parameters of alloying elements on nitrogen in liquid Fe-Cr alloys containing niobium have been determined. The equilibrium nitrogen solubility in the liquid iron alloy was measured by metal-gas equilibrium technique under 0.04 to 1.0 atm of nitrogen atmosphere at 1 823 to 1 923K. Nitrogen solubility in Fe-Cr-Nb melts obeyed Sieverts' law for all compositions studied in present study.<br>The results obtained are summarized as follows;<br>(1) The solubility of nitrogen markedly increased with increasing chromium and niobium. The interactionparameters in liquid iron alloys containing 10-18 % of Cr and 0.2-2 % of Nb are obtained.<br>(2) The solubility of nitrogen was lower at a higher temperature in Fe-Cr melts in this study.<br>(3) Test results indicated that it is not likely to form niobium nitride in Fe-Cr-Nb-N alloys and it was confirmed by EDS.

Journal

• ISIJ International

  ISIJ International 42 (6), 603-608, 2002

  The Iron and Steel Institute of Japan

Keywords

• nitrogen
• chromium
• niobium
• solubility
• interaction parameter
• activity coefficient

Details

• CRID: 1390001206453135232
• NII Article ID: 10008563947
• NII Book ID: AA10680712
• DOI: 10.2355/isijinternational.42.603
• COI: 1:CAS:528:DC%2BD38XlslKht7o%3D
• ISSN: 13475460
• ISSN: 09151559
• Web Site: http://www.jstage.jst.go.jp/article/isijinternational1989/42/6/42_6_603/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed