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Influence of four wires tandem submerged arc welding process on heat affected zone properties in high strength pipeline steel

Moeinifar, S ; Sharif University of Technology | 2010

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  1. Type of Document: Article
  2. DOI: 10.1115/1.859544.paper14
  3. Publisher: 2010
  4. Abstract:
  5. 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
  6. Keywords:
  7. Steel ; Welding ; Accelerated cooling ; Austenite grain boundaries ; Bainitic ferrite ; Charpy absorbed energy ; Charpy impact ; Four-wire ; Fusion lines ; Heat input ; High strength low alloys ; High-strength pipeline steel ; Hot-rolled ; Microalloyed Steel ; Pipeline steel ; Submerged arc ; Welded joints ; Carbon dioxide arc welding ; Charpy impact testing ; Electric welding ; Grain boundaries ; High strength alloys ; High strength steel ; Microstructure ; Pipelines ; Steel pipe ; Submerged arc welding ; Submerged melt welding ; Welded steel structures ; Wire ; Heat affected zone
  8. Source: Proceedings of the 2010 International Conference on Mechanical, Industrial, and Manufacturing Technologies, MIMT 2010, 22 January 2010 through 24 January 2010 ; 2010 , Pages 85-89 ; 9780791859544 (ISBN)
  9. URL: http://ebooks.asmedigitalcollection.asme.org/content.aspx?bookid=311§ionid=38781968