Nitrogen absorption of arc-melted Fe-Cr and Fe-Ni alloys

Takeshi Kuwana, Hiroyuki Kokawa, Naoki Muramatsu

Research output: Contribution to journalArticlepeer-review

Abstract

Fe-Cr and Fe-Ni alloys were melted by tungsten arc-melting under argon-nitrogen gas mixture atmospheres with various melting conditions in order to study the effects of chromium and nickel on the nitrogen absorption of arc-melted iron. In Fe-Cr alloys with chromium more than 8%, the nitrogen content decreases with increasing arc current. In Fe-Cr alloys with chromium less than 5.6% and Fe-Ni alloys, the nitrogen content increases slightly with the arc current. In all alloys, the nitrogen content increases with arc-melting time and then reaches a saturated value which increases with the nitrogen partial pressure of the atmosphere but does not obey Sievert's law. The nitrogen content increases with chromium content and decreases slightly with increasing nickel content. The nitrogen absorption of the arc-melted alloys is discussed thermodynamically.

Original languageEnglish
Pages (from-to)76-82
Number of pages7
JournalYosetsu Gakkai Ronbunshu/Quarterly Journal of the Japan Welding Society
Volume6
Issue number3
Publication statusPublished - 1988 Aug 1

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Surfaces, Coatings and Films
  • Metals and Alloys

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