结晶器电磁搅拌对方坯中非金属夹杂物去除的影响研究

王勇

doi:10.7513/j.issn.1004-7638.2022.01.020

结晶器电磁搅拌对方坯中非金属夹杂物去除的影响研究

doi: 10.7513/j.issn.1004-7638.2022.01.020

王勇

四川机电职业技术学院材料工程系, 四川攀枝花 617000

详细信息

中图分类号: TF777
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- 被引次数: 0
出版历程
- 收稿日期: 2021-10-12
- 网络出版日期: 2022-04-24
- 刊出日期: 2022-02-28

Study on the effect of electromagnetic stirring of mold on the removal of non-metallic inclusions in billet

Wang Yong

Department of Materials Engineering, Sichuan Institute of Mechanical and Electrical Technology, Panzhihua 617000, Sichuan, China

摘要

摘要: 电磁力影响金属熔体中非金属夹杂物的分布及颗粒的传输速度，根据这一原理，进行了结晶器电磁搅拌对方坯中非金属夹杂物去除影响的试验研究。采用200、250 A和300 A这3种不同的EMS电流对方坯坯料进行了夹杂物分离和去除的试验，并采集样品进行能谱分析。结果表明，当结晶器的电磁搅拌参数为300 A电流和3 Hz频率时，铸坯中的非金属夹杂物控制效果最佳，比不采用电磁搅拌减少了35%。
- 连铸 /
- 结晶器 /
- 电磁搅拌 /
- 非金属夹杂物
Abstract: Based on the principle that electromagnetic force affects the distribution of non-metallic inclusions and the velocity of particles in molten metal, the effect of electromagnetic stirring in mold on the removal of non-metallic inclusions in billet was studied. The inclusion separation and removal experiments were carried out by using EMS current of 200, 250 and 300 A, and the samples were collected for energy spectrum analysis. The results show that the best control effect of non-metallic inclusion in the billet is obtained when the electromagnetic stirring parameters of the mold are 300 A current and 3 Hz frequency, which is 35% less than that without electromagnetic stirring.
- continuous casting /
- crystallizer /
- electromagnetic stirring /
- non-metallic inclusion

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图 1 电磁力对钢液中夹杂物分布的影响

Figure 1. Influence of electromagnetic force on the distribution of inclusions within molted steel

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图 2 不同EMS电流下夹杂物分布（×40）（酸浸的低倍组织结果）

Figure 2. Inclusions distribution under different EMS currents (×40)

(a) I=0 A, f=0 Hz; (b) I=200 A, f=3 Hz; (c) I=250 A, f=3 Hz; (d) I=300 A, f=3 Hz

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图 3 方坯能谱样取样位置

Figure 3. Sampling locations of energy spectrum on billet

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图 4 无电磁搅拌夹杂物能谱图（I=0 A，f=0 Hz）

Figure 4. Energy spectrum of the inclusion without electromagnetic stirring (I=0 A, f=0 Hz)

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图 5 SiO₂、MgO夹杂物能谱图（I=200 A，f=3 Hz）

Figure 5. Energy spectrum of the inclusion MgO (I=200 A，f=3 Hz)

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图 6 CaS夹杂物能谱图（I=250 A，f=3 Hz）

Figure 6. Energy spectrum of the inclusion CaS (I=250 A，f=3 Hz)

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图 7 钙化效果较好的铝酸钙夹杂物能谱图（I=300 A，f=3 Hz）

Figure 7. Energy spectrum of calcium aluminate inclusions with good calcification effect

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图 8 采用和未采用M-EMS 对夹杂物分布影响的比较

Figure 8. Comparison of inclusions distribution with and without M-EMS

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表 1 连铸浇注工艺参数

Table 1. Process parameters for the continuous casting

炉批号	平台温度/℃	中包温度1/℃	中包温度2/℃	中包温度3/℃	中包平均温度/℃	过热度/℃	拉速/（m·min⁻¹）
1	1569	1545	1540	1535	1540	29	1.95
2	1565	1540	1535	1531	1535	24	1.95
3	1570	1545	1540	1536	1540	29	1.95
4	1567	1541	1535	1529	1535	24	1.95
5	1566	1540	1535	1530	1535	24	1.95
6	1569	1545	1540	1534	1539.7	28.7	1.95
7	1567	1542	1536	1529	1535.7	24.7	1.95
8	1560	1538	1530	1525	1531	20	1.95
9	1562	1539	1533	1528	1533.3	22.3	1.95

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