NARROW GAP SUBMERGED-ARC WELDING OF STEEL

This two-part review of narrow-gap submerged-arc welding and its literature is arranged under the headings:- Part 1: Applications. Applications (Requirements and Process Variants - Weld Preparation - Filler Wire Diameter - One Pass per Layer Welding - Multipass per Layer Welding - High Deposition Rate Variants). Part 2: Equipment, Consumables and Metallurgy. Equipment and Consumables (Preweld Operations - The Welding Head - Automation, Tracking and Process Control - Power Sources - Fluxes); Metallurgical Aspects. Summarising both parts of the review, the Author points out that narrow-gap submerged-arc welding can considerably reduce joint completion times in the manufacture of heavy-section steel components (70mm thick or greater), can increase productivity, and can achieve consistent joint properties. Selection of a suitable flux is essential; it must give good slag detachability while meeting the weld-metal property requirements associated with conventional submerged-arc welding. Tight process control during preparation, machining and welding must be exercised for consistent and satisfactory results. The most widely suitable process variant involves the deposition of two passes per layer; this minimises the probability of defects and increases flexibility without excessively decreasing joint-completion rate below that of a single pass per layer technique. See also Abstract No. 63,892 (Jan. 1985).

• Supplemental Notes:
  • Metal Construction, 18 (1986), p. 687 (Nov.) and p. 765 (Dec.) [9 pp., 28 ref., 3 tab., 20 fig.]
• Authors:
  • Kennedy, N A
• Publication Date: 1986

Language

• English

Subject/Index Terms

• Subject Areas: Marine Transportation;

Filing Info

• Accession Number: 00691029
• Record Type: Publication
• Source Agency: British Maritime Technology
• Files: TRIS
• Created Date: Aug 14 1995 12:00AM