Relationships between δ→γ Phase Transformation and the Crack Formation in Continuous Casting Slabs

Abstract:

The δ→γ phase transformation in the steel was studied in detail, and the relationship between δ→γ phase transformation and the crack formation in continuous casting slabs was discussed as well. The results indicate that the micropores are formed at the positions where δ-phase transformation terminates during the δ→γ phase transformation for low-carbon non-peritectic steel. The micropores will also be formed at the positions where the peritectic reaction of the steel terminates, then the pores are remained on the grain boundary of γ-phase when γ-phase becomes granulated. The micropores distributing on the grain boundary of γ-phase is one of the results for the crack formation of continuous casting slabs and the obvious plasticity decrease of δ-phase zone in the steel. The theoretical analysis results are basically consistent with the experimental results.

• Periodical: Advanced Materials Research (Volumes 415-417)
• Pages: 929-933
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.415-417.929
• Online since: December 2011
• Authors: Guo Wei Chang, Qing Chun Li, Shu Ying Chen, Xu Dong Yue, Yan Yu, Cheng Quan Wang
• Keywords: Continuous Casting, Crack Formation, Peritectic Reaction, δ→γ Phase Transformation

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