E355板坯凝固传热及压下位置研究

王添乐; 郭明辉; 郑鑫钰; 丰琦; 谢鑫; 关建超; 孙彦辉

doi:10.7513/j.issn.1004-7638.2025.06.015

E355板坯凝固传热及压下位置研究

doi: 10.7513/j.issn.1004-7638.2025.06.015

1.
北京科技大学, 钢铁共性技术协同创新中心, 北京100083
2.
攀钢集团西昌钢钒有限公司, 四川西昌 615032
3.
攀钢集团攀枝花钢铁研究院有限公司, 四川攀枝花 617002

基金项目: 中央高校基本科研业务资助项目(06930007)。

详细信息

作者简介:
王添乐，2001年出生，男，黑龙江青冈人，硕士研究生，主要研究方向：连铸坯质量控制，E-mail：996999782@qq.com

通讯作者:
孙彦辉，1971年出生，男，黑龙江青冈人，博士，教授，主要从事品种钢开发及连铸工艺关键技术研究，E-mail：ustb420@126.com

中图分类号: TF044
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- 文章访问数: 19
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- PDF下载量: 1
- 被引次数: 0
出版历程
- 收稿日期: 2025-06-20
- 录用日期: 2025-09-15
- 修回日期: 2025-08-29
- 网络出版日期: 2025-12-31
- 刊出日期: 2025-12-31

Research on solidification heat transfer and reduction position of grade E355 slab

1.
Collaborative Innovation Center for Generic Technology of Steel Technology, University of Science and Technology Beijing, Beijing 100083, China
2.
Pangang Group Company Limited Xichang Steel-Vanadium Co., Ltd., Xichang 615032, Sichuan, China
3.
Pangang Group Company Limited Panzhihua Iron & Steel Research Institute Co., Ltd., Panzhihua 617002, Sichuan, China

摘要

摘要: 为改善E355板坯连铸坯质量，通过数值模拟的方法，对现有生产状况进行了分析，分别研究了拉速、比水量和过热度对铸坯凝固过程和压下位置的影响。根据模拟结果，得到理论上该钢种更优的生产条件：拉速为1.1 m/min，比水量为0.66 L/kg，过热度为10 ℃，轻压下位置为距弯月面17.8～21.1 m，根据生产数据，压下位置应在seg.7~9。
- E355钢 /
- 射钉试验 /
- 数值模拟 /
- 轻压下
Abstract: In order to improve the quality of grade E355 slab, based on the existing process conditions numerical simulation, had been conducted to investigate the influences of casting speed, water ratio and superheat on the solidification process of the slab and the position of the soft reduction. Based on the simulation results, theoretically optimal production conditions for this steel grade have been obtained as follows: casting speed is 1.1 m/min, water ratio is 0.66 L/kg, superheat is 10℃, the area of soft reduction is located at a distance of 17.8 m to 21.1 m from the concave surface. According to production data, the soft reduction position should be in segment 7-9.
- E355 steel /
- nail shooting experiment /
- numerical simulation /
- soft reduction

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图 1 E355钢物性参数

Figure 1. Thermal properties of E355 steel

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图 2 射钉试验示意

Figure 2. Diagram of nail shooting experiment

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图 3 射钉试验与模拟结果对比

Figure 3. Comparison of nail shooting experiment and simulation results

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图 4 E355板坯的酸洗相片

（a）1-1号试样（拉速1.0 m/min）; （b）1-2号试样（拉速1.1 m/min）; （c）1-3号试样（拉速1.2 m/min）

Figure 4. The results of nail shooting experiment of the E355 slab

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图 5 不同拉速下的温度场变化

Figure 5. Effect of the different casting speed on the temperature field of slab

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图 7 不同比水量下的温度场变化

Figure 7. Effect of the different cooling specific water on the temperature field of slab

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图 9 不同过热度下的温度场变化

Figure 9. Effect of the different superheat on the temperature field of slab

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图 6 不同拉速下的中心固相率曲线

Figure 6. Effect of casting speed on the center fraction of slab

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图 8 不同比水量下的中心固相率曲线

Figure 8. Effect of the different cooling specific water on the center fraction of slab

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图 10 不同过热度下的中心固相率变化

Figure 10. Effect of the different superheat on the center fraction of slab

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表 1 E355钢的化学成分

Table 1. The chemical composition of E355 steel %

C	S	Mn	P	else
0.17～0.20	0.002～0.003	1.28～1.30	0.008～0.009

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表 2 结晶器参数

Table 2. The technical parameters of mould

Effective height /mm	Water flow of wide face/ （L$ \cdot $min⁻¹）	Water flow of narrow face/ （L$ \cdot $min⁻¹）	Temperature difference for outlet and inlet /℃
800	3100	550	5

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表 3 二冷区参数

Table 3. The technical parameters of secondary cooling zone

Secondary cooling zone	Distance from meniscus / mm	Cooling water flow rate/（L$ \cdot $min⁻¹）
		Cast speed 1.0 m/min		Cast speed 1.1 m/min		Cast speed 1.2 m/min
		Inner arc	Outer arc	Inner arc	Outer arc	Inner arc	Outer arc
ZoneⅠ	1063	172		191		211
Flank of zone Ⅰ		67		74		82
Zone Ⅱ	1783	266		296		324
Zone Ⅲ	2865	252		282		310
Zone Ⅳ	4434	224		252		280
Zone Ⅴ	6636	89	97	102	111	115	125
Zone Ⅵ	10149	96	115	114	136	132	157
Zone Ⅶ	16343	58	78	76	102	94	126
Zone Ⅷ	20699	9	13	9	13	26	36
According to the production situation, the cooling specific water amount is 0.52, 0.55, 0.57 L/kg respectively.

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表 4 射钉试验钢钉成分

Table 4. Chemical composition of nail shooting steel %

Brand	Element content
Brand	C	Si	Mn	Cr	else
60Si2MnA	0.56~0.64	1.60~2.00	0.60~0.90	≤0.35

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表 5 射钉试验生产参数

Table 5. Process conditions of nail shooting experiment

Grade	Cast speed/ （m$ \cdot $min⁻¹）	Superheat/ ℃	Water flow of meniscus wide face/ (L$ \cdot $min⁻¹)	Water flow of meniscus narrow face/ (L$ \cdot $min⁻¹)	Specific water amount / (L$ \cdot $kg⁻¹)
E355	1.0	15	3100	550	0.519
	1.1				0.546
	1.2				0.574

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表 6 射钉试验初始数据

Table 6. The initial nail shooting experiment results

Nail-shooting sequence number	Cast speed/ （m$ \cdot $min⁻¹）	Nail-shooting position /m	Shell thickness /mm	Solidification coefficient / ( mm·min^1/2)	Solidification end point/m
1-1	1.0	16.6	90	24.90	21.32
1-2	1.1	18.7	94	25.15	22.99
1-3	1.2	20.88	96	25.18	25.01

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