C70600白铜空心锭立式连铸工艺参数对凝固过程的影响

蔡军; 杨清相; 乔柯; 王文; 王快社

doi:10.13433/j.cnki.1003-8728.20220207

C70600白铜空心锭立式连铸工艺参数对凝固过程的影响

doi: 10.13433/j.cnki.1003-8728.20220207

蔡军^{1, 2,},
杨清相^{1, 2},
乔柯^{1, 2},
王文^{1, 2},
王快社^{1, 2}

1.
西安建筑科技大学冶金工程学院, 西安 710055
2.
国家联合地方功能材料加工中心, 西安 710055

基金项目:

国家自然科学基金重点项目 U1760201

国家自然科学基金重点项目 5203405

国家自然科学基金项目 51974220

陕西省重点研发项目 2020ZDLGY13-06

详细信息

作者简介:
蔡军, 博士, caijun0116@163.com

中图分类号: TG244
计量
- 文章访问数: 50
- HTML全文浏览量: 21
- PDF下载量: 9
- 被引次数: 0
出版历程
- 收稿日期: 2021-11-27
- 刊出日期: 2024-01-25

Influence of Process Parameters on Solidification Process in Vertical Continuous Casting of C70600 White Copper Hollow Ingot

CAI Jun^{1, 2
,},
YANG Qingxiang^{1, 2},
QIAO Ke^{1, 2},
WANG Wen^{1, 2},
WANG Kuaishe^{1, 2}

1.
School of Metallurgical Engineering, Xi′an University of Architecture and Technology, Xi′an 710055, China
2.
National and Local Joint Engineering Research Center for Functional Materials Processing, Xi′an 710055, China

摘要

摘要: 为了获得Ø260 × Ø80 C70600白铜空心锭立式连铸合理的工艺参数，通过数值模拟定量分析了各种工艺参数对温度场和应力场的影响。结果表明: 浇铸温度每提高20 ℃, 液穴深度增加10 mm; 拉坯速度每提高10 mm/min，液穴深度增加20 mm; 液穴深度随着石墨芯管冷却强度的增大而减小。基于正交试验和方差分析发现，F_A＞F_0.01(3, 3)，F_B＞F_D＞F_0.1(3, 3)，F_C＜F_0.1(3, 3)，因此，拉坯速度对液穴深度的影响最显著，一冷强度对其影响不显著。根据模拟结果提出了合理工艺参数为：一冷强度24 m³/h、拉坯速度80 mm/min、浇铸温度1 280 ℃、芯管采用空冷。在此基础上成功试制出了合格的C70600白铜空心锭成品。
- 立式连铸 /
- 工艺参数 /
- 空心锭 /
- 液穴深度 /
- 应力场 /
- 数值模拟
Abstract: In order to obtain the reasonable process parameters in the vertical continuous casting of large diameter Ø260×Ø80 C70600 cupronickel alloy hollow ingot, the effects of the processing parameters on the temperature field and stress field were quantitatively analyzed by using numerical simulation. The results show that the sump depth increases by 10 mm when the casting temperature increases by 20 ℃, and the sump depth increases by 20 mm when the drawing speed increases by 10 mm/min. The sump depth decreases with the increasing of cooling strength of the graphite core tube. Based on the orthogonal test and variance analysis: F_A > F_0.01(3, 3), F_B > F_D > F_0.1(3, 3), F_C < F_0.1(3, 3), therefore, the sump depth is extremely sensitive to the drawing speed, the sump depth is not sensitive to the drawing speed primary cold strength. According to the simulation results, the reasonable processing parameters are as follows: primary cooling strength of 24 m³/h, drawing speed of 80 mm/min, casting temperature of 1 280 ℃, and air cooling for core tube, on this basis, the C70600 cupronickel alloy hollow ingots were successfully produced.
- vertical continuous casting /
- process parameters /
- hollow ingot /
- sump depth /
- stress field /
- numerical simulation

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图 1 热挤压过程中C70600白铜管的缺陷

Figure 1. Defects of C70600 cupronickel alloy tube during hot extrusion

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图 2 立式连铸三维模型

Figure 2. Vertical continuous casting geometric model

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图 3 C70600铁白铜物性参数随温度的变化

Figure 3. The change of physical parameters of C70600 cupronickel alloy with temperature

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图 4 不同时间下的温度分布情况

Figure 4. Temperature distribution at different time

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图 5 不同时间下的液穴形状

Figure 5. The shape of sump at different time

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图 6 不同时间下的空心锭等效应力场

Figure 6. Variation of equivalent stress field of hollow ingot with time

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图 7 不同时间下的石墨芯管的等效应力

Figure 7. The change of equivalent stress of graphite core tube with time

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图 8 不同时间下结晶器应力分布图

Figure 8. The of mold equivalent stress distribution at different time

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图 9 特征节点位置示意图

Figure 9. Feature node position diagram

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图 10 特征点温度和等效应力随时间变化

Figure 10. The change of temperature and equivalent stress of the characteristic points with time

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图 11 不同工艺参数下的温度场

Figure 11. The temperature field under different process parameters

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图 12 不同工艺参数下的液穴形状

Figure 12. Shape of sump under different process parameters

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图 13 不同工艺参数下的液穴深度随时间的变化曲线

Figure 13. The variation curve of liquid sump depth with time under different process parameters

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图 14 Ø260×Ø80 C70600空心锭成品

Figure 14. Ø260 ×Ø80 C70600 hollow ingot finished product

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图 15 C70600空心锭宏观金相

Figure 15. Macroscopic metallography of C70600 hollow ingot

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表 1 因素水平表

Table 1. Factor level table

水平	A	B	C	D
1	70	24	空冷	1 260
2	80	28	5	1 280
3	90	32	10	1 300
4	100	36	15	1 320

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表 2 液穴深度正交表

Table 2. Orthogonal table of sump depth

实验号	因素				液穴深度 d_center/mm
实验号	A	B	C	D	液穴深度 d_center/mm
1	1	1	1	1	289
2	1	2	2	2	294
3	1	3	3	3	289
4	1	4	4	4	291
5	2	1	2	3	303
6	2	2	1	4	305
7	2	3	4	1	310
8	2	4	3	2	313
9	3	1	3	4	322
10	3	2	4	3	328
11	3	3	1	2	328
12	3	4	2	1	333
13	4	1	4	2	345
14	4	2	3	1	362
15	4	3	2	4	347
16	4	4	1	3	353
K₁	1 163	1 259	1 275	1 294
K₂	1 231	1 289	1 277	1 280
K₃	1 311	1 274	1 286	1 273
K₄	1 407	1 290	1 274	1 265
k₁	290.75	314.75	318.75	323.50
k₂	307.75	322.25	319.25	320
k₃	327.75	318.50	321.50	318.25
k₄	351.75	322.50	318.50	316.25

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表 3 液穴深度方差分析

Table 3. Variance analysis of sump depth

方差来源	偏差平方和S	自由度f	平均偏差平方和MS	F值	显著性
拉坯速度(A)	8 291	3	2 763.67	448.16	**
一冷强度(B)	160.5	3	53.50	8.68	*
芯管冷却强度(C)	22.5	3	668.33	1.22
浇铸温度(D)	113.5	3	7.50	6.13	*
误差	18.5	3	6.17
Total	8 583.5	15
注: F_0.01(3, 3)=29.457;F_0.05(3, 3)=9.28;F_0.1(3, 3)=5.39。

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