Transactions of Materials and Heat Treatment

Title：Influence of crystallizer vibration on quality of casting billet and rolling for 2Cr13 stainless steel

Authors： Lin Peng 1 2 Zheng Yaxu3 4 Wang Dongchen1 Zhang Long3

Unit： 1. Department of Materials and Building Engineering Hebei Institue of Mechanical and Electrical Technology 2. Xingtai Technology Innovation Center for Mold Material 3. School of Materials Science and Engineering Hebei University of Science and Technology 4. Yancheng Lianxin Steel Co. Ltd.

KeyWords： 2Cr13 stainless steel rolling quality crystallizer vibration casting billet negative slip time negative slip rate

ClassificationCode：TG335.15

year,vol(issue):pagenumber：2024,49(10):92-98

Abstract：

In response to the quality issues such as concave and hooked vibration marks, as well as rolling wire scars and cracks in the production of 150 mm×150 mm 2Cr13 stainless steel casting billets by a certain steel plant, the production mechanism of surface defects on the casting billets was analyzed, and an optimization scheme for crystallizer vibration in the continuous casting production of casting billet was proposed and verified in industry. The results indicate that the surface defects of 2Cr13 stainless steel casting billets are caused by the prolonged negative slip time of crystallizer. At a conventional casting speed of 1.2 m· min-1, compared to the sinusoidal vibration of crystallizer, a non-sinusoidal vibration optimization scheme is adopted for the crystallizer vibration. The negative slip time and negative slip rate are reduced from 0.18 s and 38% to 0.12 s and 33%, respectively. By appropriately reducing the negative slip time and negative slip rate, the surface quality of 2Cr13 stainless steel casting billets is effectively improved. The surface quality defect rate of rolled wire is reduced from 4.5% to 0.8%, and the maximum depth of surface cracks is decreased from 327.89 μm to 94.34 μm.

Funds：

国家自然科学基金资助项目（52204341）；河北省自然科学基金资助项目（E2024208002）；河北省高等学校科学技术研究项目（ZC2024141）

作者简介：林鹏（1984-），男，博士，讲师,E-mail：PengLin3005@163.com;通信作者：郑亚旭（1984-），女，博士，讲师,E-mail：zhengyaxu1984@163.com

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