Abstract:The hypo-peritectic micro-alloyed steel is highly susceptive to cracking, which induces transverse corner cracks in the production frequently. To reveal the formation mechanism of these transverse corner cracks, the influencing factors and corresponding control methods were summarized in the aspects of formation mechanism and production conditions. It was concluded that the internal causes of the transverse corner cracks were the chemical composition and the evolution of solidified structure in steel, and the external causes were the mold parameters, secondary cooling parameters and equipment conditions in the actual production process. The future development direction of corner transverse crack control technology is mainly on the optimization of chamfering mold and the precise control and theoretical perfection of the double phase transformation technology.
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