| 高拉速板坯连铸结晶器液体摩擦机理分析 |
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| 引用本文： | 孟祥宁,朱苗勇.高拉速板坯连铸结晶器液体摩擦机理分析[J].金属学报,2008,44(10):1193-1197. |
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| 作者姓名： | 孟祥宁 朱苗勇 |
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| 作者单位： | 东北大学材料与冶金学院,沈阳,110004 |
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| 基金项目： | 国家高技术研究发展计划(863计划)，教育部跨世纪优秀人才培养计划，东北大学博士后科研基金 |
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| 摘 要： | 基于液态渣动量和质量守恒原理,建立结晶器非正弦振动模式下弯月面区液体摩擦力计算模型,通过分析2.0 m·min-1拉速时液体摩擦力极值问题,提出新的液体摩擦机制.研究表明:液体摩擦力受渣道形状、熔渣池深度和结晶器与铸坯间相对运动状态等影响,并随振动波形变化;理想状态下最大液体摩擦力发生在振动速度与拉速相等时刻附近;表面裂纹生成于临近负滑脱段的正滑脱时段内,并在负滑脱段得到愈合.
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| 关 键 词： | 连铸结晶器 高拉速 液体摩擦力 表面裂纹 非正弦振动 |
| 收稿时间： | 2008-03-24 |
| 修稿时间： | 2008-06-10 |
ANALYSIS OF LIQUID FRICTION MECHANISM FOR SLAB CONTINUOUS CASTING MOLD WITH HIGH CASTING SPEED |
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| MENG Xiangning,ZHU Miaoyong.ANALYSIS OF LIQUID FRICTION MECHANISM FOR SLAB CONTINUOUS CASTING MOLD WITH HIGH CASTING SPEED[J].Acta Metallurgica Sinica,2008,44(10):1193-1197. |
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| Authors: | MENG Xiangning ZHU Miaoyong |
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| Abstract: | On the basis of laws of momentum and mass conservation of liquid flux, a mathematical model to represent the liquid friction force in meniscus under non-sinusoidal oscillation was established, and a new liquid friction mechanism was proposed by solving extremum equations of liquid friction force as 2.0 m•min-1 casting speed. The results show that liquid friction force was mainly influenced by the shape of flux channel, depth of molten flux pool and relative motion between oscillating mold and strand and varies with oscillation waveform. Maximum liquid friction force occurs nearby the moment of oscillation velocity equal to casting speed under an ideal state. Surface cracks formed in the positive strip time adjacent to negative strip time, and healed during the negative strip time. |
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| Keywords: | continuous casting mold high casting speed liquid friction force surface cracks non-sinusoidal oscil |
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