Mechanism for Loss of Hot Ductility Due to Deformation during Solidification in Continuous Casting of Steel

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概要

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• Strand surface cracking is a problem that can lead to scrap the product of the continuous casting process. Stress and strain developed during continuous casting have been found to be effective in this respect. The crack susceptibility is usually evaluated by assessing the steel hot ductility at the straightening stage of the process. The hot ductility of two Nb-microalloyed steels was evaluated in in situ melted specimens. The billet surface thermal history was simulated in order to generate the billet surface microstructure. The effect of deformation incorporated with steel solidification was studied and it was found that any kind of deformation during solidification results in loss of hot ductility. Metallography of specimens revealed that deformation caused grain boundary cracking and changed the segregation pattern, leading to loss of hot ductility. Based on this, a mechanism for hot ductility loss was proposed.

• 社団法人 日本鉄鋼協会の論文
• 2004-10-15

著者

• Yue Steve

  Department Of Metals And Materials Engineering Mcgill University

• ZARANDI Faramarz

  Department of Metals and Materials Engineering, McGill University

• Zarandi Faramarz

  Department Of Metals And Materials Engineering Mcgill University

関連論文

• Effect of Thermomechanical Processing on the Hot Ductility of a Nb-Ti Microalloyed Steel
• Improvement of Hot Ductility in the Nb-microalloyed Steel by High Temperature Deformation
• Mechanism for Loss of Hot Ductility Due to Deformation during Solidification in Continuous Casting of Steel
• Effect of Microstructure on Static and Dynamic Mechanical Property of a Dual Phase Steel Studied by Shear Punch Testing
• The Effect of Boron on Hot Ductility of Nb-microalloyed Steels
• Impact Toughness and Tensile Properties Improvement through Microstructure Control in Hot Forged Nb-V Microalloyed Steel

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