The Nitrogen Absorption of Iron Weld Metal by Gas Tungsten Arc Welding

Takeshi Kuwana, Hiroyuki Kokawa

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

Using an arc atmosphere controlling chamber, effects of the welding condition and atmosphere on the nitrogen content of the iron weld metal were investigated by gas tungsten arc welding. The results are as follows : (1) The nitrogen content decreases with increasing the welding current. (2) The nitrogen content hardly depends on the arc length and the travel speed. (3) The nitrogen content is anomalously high at low arc atmospheric pressure region and constant above 0.2 atm of the nitrogen pressure in N2 gas atmosphere (Pn2 ≦ 1 arm). (4) The nitrogen content increases with increasing the nitrogen partial pressure and is constant above 0.1 atm of the nitrogen partial pressure in the N2-Ar and N2-He gas mixture atmospheres (Pn2+ Par = 1 atm, PN2+PHe=l atm). (5) The nitrogen content gradually increases with increasing the nitrogen partial pressure in the N2-H2 gas mixture atmosphere (Pn2 + Ph2=1 atm). (6) The nitrogen absorption into weld metal was discussed with equilibrium data.

Original languageEnglish
Pages (from-to)392-398
Number of pages7
Journalquarterly journal of the japan welding society
Volume1
Issue number3
DOIs
Publication statusPublished - 1983 Jan

ASJC Scopus subject areas

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

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