Journal of Northeastern University Natural Science ›› 2016, Vol. 37 ›› Issue (1): 54-58.DOI: 10.12068/j.issn.1005-3026.2016.01.012

• Materials & Metallurgy • Previous Articles     Next Articles

Effect of Mold Oscillation on Initial Cracks Formation of Continuous Casting Slabs

MENG Xiang-ning1, LIN Ren-gan1,2, YANG Jie1, ZHU Miao-yong1   

  1. 1.School of Materials & Metallurgy, Northeastern University, Shenyang 110819, China; 2.Baosteel Special Metals Co., Ltd., Shanghai 200940, China.
  • Received:2014-11-24 Revised:2014-11-24 Online:2016-01-15 Published:2016-01-08
  • Contact: MENG Xiang-ning
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Abstract: The previous researches on the stress state of initial solidifying shell in oscillation mold and the detailed reasons to clarify the crack formation process were summarized. The mechanical stress caused by mold oscillation has a dominant contribution to the initial cracks formation as a nonnegligible factor, so a new model was proposed to shed light on the influence of mold oscillation on the initial cracks formation. The stress states of the shell were analyzed for an oscillation cycle. The results showed that the mold oscillation plays an important role on the cracks formation because the maximum bending stress in initial solidifying shell can reach to 148.4kPa and the critical fracture strength of the shell is only 119.1kPa. The initial crack will form when the oscillation velocity is higher than 1.61m·min-1, which is located in the region of 2.15~5.4mm under the free surface of steel in the mold because the critical fracture strength at a certain temperature is exceeded.

Key words: oscillating mold, initial solidifying shell, initial cracks formation, bending stress, critical fracture strength

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