EFFECT OF PROCESS PARAMETERS ON METAL TRANSFER OF HYPERBARIC GMAW OF DUPLEX STAINLESS STEELS

This work presents the preliminary results of a comprehensive and systematic evaluation of current rise and fall rates as well as shielding gas composition and their affect on the metal transfer, when duplex stainless steels are GMA welded under hyperbaric conditions using the short circuit metal transfer mode. The evaluation of the test results is based on an examination of the welding process signals recorded on a transient recorder. Over a time period of 500 ms, the signal was measured to assess the process instability, current rise and fall rates and their inter- relationship. The results presented in this study indicate that for a given welding condition, the appropriate selection of current rise and fall rates can minimise the effect of instabilities caused by high ambient pressure. The presence of active gases in the shielding dit not significantly affect the metal transfer behaviour.

• Supplemental Notes:
  • ISOPE 94, 4th Intl Offshore & Polar Engng Conf; 10-15 April 1994; Osaka, Japan. Sponsored by ISOPE, USA et al. Procs. Publ by ISOPE, ISBN 1-880653-14-1. Vol IV, p 107 [5 p, 7 ref, 3 tab, 6 fig]
• Authors:
  • Olsen, J M
  • Dos Santo, J F
  • Richardson, I M
• Publication Date: 1994

Language

• English

Subject/Index Terms

• TRT Terms: Gas metal arc welding; Stainless steel; Welding
• Old TRIS Terms: Underwater welding
• Subject Areas: Construction; Marine Transportation;

Filing Info

• Accession Number: 00709711
• Record Type: Publication
• Source Agency: British Maritime Technology
• Files: TRIS
• Created Date: Aug 14 1995 12:00AM