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Effect of finishing temperature on mechanical properties of a Nb-microalloyed steel sheet

Mirahmadi Khaki, D ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.4028/www.scientific.net/AMR.129-131.1022
  3. Abstract:
  4. Thermo mechanical processing and controlled rolling of microalloyed steel sheets are affected by several factors. In this investigation, finishing temperature of rolling which is considered as the most effective parameters on the final mechanical properties of hot rolled products has been studied. For this purpose, three different finishing temperatures of 950, 900 and 850 °C below the non-recrystallization temperature and one temperature of 800 °C in the intercritical range were chosen. It is observed that decreasing the finishing temperature causes increase of strength and decrease of total elongation. This is accompanied by more grain refinement of microstructure and the morphology was changed from polygonal ferrite to acicular one. Findings of this research provide suitable connection among finishing temperature, microstructural features, and mechanical properties of hot rolled Nb-microalloyed steel sheets
  5. Keywords:
  6. Nb-microalloyed steel ; Thermo mechanical processing ; Controlled hot rolling ; Controlled rolling ; Effective parameters ; Finishing temperature ; Hot-rolled ; Microalloyed steel ; Microstructural features ; Polygonal ferrites ; Recrystallization temperatures ; Thermo-mechanical processing ; Total elongations ; Ferrites ; Finishing ; Flight dynamics ; Grain refinement ; Manufacture ; Mechanical properties ; Metal analysis ; Metal working ; Microstructural evolution ; Steel metallography ; Steel sheet ; Hot rolling
  7. Source: Advanced Materials Research, 17 September 2010 through 19 September 2010 ; Volume 129-131 , 2010 , Pages 1022-1028 ; 10226680 (ISSN) ; 9780878492435 (ISBN)
  8. URL: http://www.scientific.net/AMR.129-131.1022