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小方坯齿轮钢连铸过程中的宏观偏析模拟

王亚栋 张立峰 张海杰

王亚栋, 张立峰, 张海杰. 小方坯齿轮钢连铸过程中的宏观偏析模拟[J]. 工程科学学报, 2021, 43(4): 561-568. doi: 10.13374/j.issn2095-9389.2020.02.27.001
引用本文: 王亚栋, 张立峰, 张海杰. 小方坯齿轮钢连铸过程中的宏观偏析模拟[J]. 工程科学学报, 2021, 43(4): 561-568. doi: 10.13374/j.issn2095-9389.2020.02.27.001
WANG Ya-dong, ZHANG Li-feng, ZHANG Hai-jie. Simulation of the macrosegregation in the gear steel billet continuous casting process[J]. Chinese Journal of Engineering, 2021, 43(4): 561-568. doi: 10.13374/j.issn2095-9389.2020.02.27.001
Citation: WANG Ya-dong, ZHANG Li-feng, ZHANG Hai-jie. Simulation of the macrosegregation in the gear steel billet continuous casting process[J]. Chinese Journal of Engineering, 2021, 43(4): 561-568. doi: 10.13374/j.issn2095-9389.2020.02.27.001

小方坯齿轮钢连铸过程中的宏观偏析模拟

doi: 10.13374/j.issn2095-9389.2020.02.27.001
基金项目: 国家自然科学基金资助项目(U186026,51725402)
详细信息
    通讯作者:

    E-mail:zhanglifeng@ysu.edu.cn

  • 中图分类号: TF777.3

Simulation of the macrosegregation in the gear steel billet continuous casting process

More Information
  • 摘要: 基于国内某厂齿轮钢小方坯连铸生产过程,利用ProCAST软件建立移动切片模型,能够高效模拟连铸过程中的宏观偏析,模型分别模拟研究了不同过热度、二冷水量和拉坯速度等对宏观偏析的影响。模拟结果与碳偏析检测结果吻合良好,验证了移动切片模型模拟连铸坯宏观偏析的准确性。由于溶质浮力的影响,内弧侧的宏观偏析强于外弧侧。随着过热度的增加,铸坯中心碳偏析度从1.06增加至1.15。过热度控制在25 ℃范围内,可以保证铸坯的宏观碳偏析度控制在1.10范围内。随着连铸二冷水量的增加,铸坯中心偏析改善程度较小,铸坯中心碳偏析度从1.16降低至1.13。随着拉坯速度的增加,铸坯中心偏析呈现加重的趋势,铸坯中心碳偏析度由1.14增加至1.21,拉坯速度控制在1.4 m·min–1范围内,可保证铸坯中心碳偏析度低于1.15。
  • 图  1  移动切片模型

    Figure  1.  Moving slice model

    图  2  钢的热物性参数。(a)热导率;(b)密度;(c)热焓;(d)黏度;(e)固相率

    Figure  2.  Thermophysical parameters of the steel: (a) conductivity; (b) density; (c) enthalpy; (d) viscosity; (e) solid fraction

    图  3  计算得到的铸坯表面温度和测量结果的对比

    Figure  3.  Comparison between the calculated and measured results of the billet surface temperature

    图  4  检测得到的碳含量与模拟结果对比

    Figure  4.  Comparison between the calculated and measured results of the carbon content

    图  5  过热度对铸坯宏观偏析的影响

    Figure  5.  Effect of superheat on the macrosegregation of the billet

    图  6  过热度对铸坯宏观偏析的定量影响

    Figure  6.  Effect of superheat on the quantized results of the macrosegregation

    图  7  二冷水量对铸坯宏观偏析的影响

    Figure  7.  Effect of secondary cooling water flow on macrosegregation of the billet

    图  8  二冷水量对铸坯宏观偏析的定量影响

    Figure  8.  Effect of secondary cooling water flow on the quantized results of macrosegregation

    图  9  拉坯速度对铸坯宏观偏析的影响

    Figure  9.  Effect of casting speed on macrosegregation of the billet

    图  10  拉坯速度对铸坯宏观偏析的定量影响

    Figure  10.  Effect of casting speed on the quantized results of macrosegregation

    图  11  拉坯速度对凝固坯壳厚度的影响

    Figure  11.  Effect of casting speed on the shell thickness of the billet

    表  1  齿轮钢成分(质量分数)

    Table  1.   Element content of the gear steel %

    CSiMnPSAlCrTi
    0.2150.2400.8900.0200.0200.0201.0900.006
    下载: 导出CSV

    表  2  各区长度和冷却水量

    Table  2.   Length and cooling water flow in each zone

    Cooling zoneWater flow/(m3·h−1)Length/m
    Mold1080.9
    Zone13.320.35
    Zone22.201.78
    Zone31.031.85
    下载: 导出CSV
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出版历程
  • 收稿日期:  2020-02-27
  • 网络出版日期:  2020-12-28
  • 刊出日期:  2021-03-31

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