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Influence of Four Wires Tandem Submerged Arc Welding Process on Heat Affected Zone Properties in High Strength Pipeline Steel

Excerpt

The objective of this investigation was to provide a detailed evaluation of the heat affected zone properties of a high-strength pipeline steel. The X80 high-strength low-alloy microalloyed steel was supplied as a hot rolled plate with accelerated cooling. The four-wire tandem submerged arc welding process with different heat input was used to generate welded joints. The microstructure of the heat affected zone depended on heat input values. M/A constituent appeared in the microstructure of HAZ region for all of the specimens along the prior-austenite grain boundaries and between bainitic ferrite laths. Charpy impact specimens were notched in four locations: FL (fusion line), FL+1mm, FL+2mm and FL+3mm. The Charpy absorbed energy of specimens was assessed using Charpy impact testing at −50°C

  • Abstract
  • Key Words
  • 1. Introduction
  • 2. Experimental
  • 3 Results and Discussion
  • 4. Summaries
  • References

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