高牌号无取向硅钢硫化物、氮化物析出的热力学计算

冯国辉; 程传良; 王旭; 乔家龙; 时朋召; 郭飞虎; 刘磊; 仇圣桃

doi:10.7513/j.issn.1004-7638.2024.06.026

高牌号无取向硅钢硫化物、氮化物析出的热力学计算

doi: 10.7513/j.issn.1004-7638.2024.06.026

1.
南京钢铁股份有限公司板材事业部, 江苏南京 210044
2.
钢铁研究总院连铸技术国家工程研究中心, 北京 100083

详细信息

作者简介:
冯国辉，男，1978年出生，大学，工程师，主要从事特殊钢连铸坯质量控制硏究工作， E-mail：fengguohui@njsteel.com.cn

通讯作者:
王旭，男，1987年出生，工学博士，主要从事连铸坏质量控制研究工作，E-mail：wx4594@126.com

中图分类号: TF76
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- PDF下载量: 21
- 被引次数: 0
出版历程
- 收稿日期: 2023-01-22
- 网络出版日期: 2024-12-30
- 刊出日期: 2024-12-30

Thermodynamic calculation of sulfide and nitride precipitation in high grade non-oriented silicon steel

1.
Plate Business Department, Nanjing Iron and Steel Co., Ltd., Nanjing 210035, Jiangsu, China
2.
National Engineering Research Center of Continuous Casting Technology, Central Iron and Steel Research Institute, Beijing 100083, China

摘要

摘要: 通过对高牌号无取向电工钢 50W350硫化物、氮化物的热力学计算，获得了析出物的平衡浓度关系。液相线温度以下，AlN在1700～1788 K温度区间析出，TiN的析出温度区间为1588～1788 K，MnS的析出温度区间在1768～1788 K范围内，Cu₂S的析出温度范围为1420～1768 K，并通过实际检测，证实了各温度区间析出物的存在。
- 无取向硅钢 /
- 液相线 /
- 固相线 /
- 硫化物 /
- 氮化物 /
- 溶度积
Abstract: The equilibrium concentration relationship of precipitates was obtained by thermodynamic calculation of sulfide and nitride of the high grade non-oriented electrical steel 50W350. Below the liquidus temperature, AlN precipitates in the range of 1 700-1 788 K, TiN in the range of 1 588-1 788 K, MnS in the range of 1 768-1 788 K, Cu₂S in the range of 1 420-1 768 K. The existence of precipitates in each temperature range has been confirmed through detection.
- non-oriented silicon steel /
- liquidus temperature /
- solidus temperature /
- sulfide /
- nitride /
- solubility product

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图 1 Fe-Si二元相图 ( FactSage software)

Figure 1. Fe-Si binary phase diagram ( FactSage software)

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图 2 AlN在钢液中溶度积关系

Figure 2. Solubility product of AlN in liquid steel

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图 3 TiN在钢液中溶度积关系

Figure 3. Solubility product of TiN in liquid steel

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图 4 MnS在钢液中的溶度积关系

Figure 4. Solubility product of MnS in liquid steel

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图 5 Cu₂S在钢液中溶度积关系

Figure 5. Solubility product of Cu₂S in liquid steel

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图 6 凝固过程中AlN析出溶度积关系

Figure 6. Relationship of solubility product of AlN precipitation and temperature during solidification process

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图 7 凝固过程中TiN析出溶度积关系

Figure 7. Relationship of solubility product of TiN precipitation and temperature during solidification process

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图 8 凝固过程中MnS析出溶度积关系

Figure 8. Relationship of solubility product of MnS precipitation and temperature during solidification process

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图 9 凝固过程中Cu₂S析出溶度积关系

Figure 9. Relationship of solubility product of Cu₂S precipitation and temperature during solidification process

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图 10 凝固过程中AlN析出溶度积关系

Figure 10. Relationship of solubility product of AlN precipitation and temperature during solidification process

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图 11 凝固过程中TiN析出溶度积关系

Figure 11. Relationship of solubility product of TiN precipitation and temperature during solidification process

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图 12 凝固过程中MnS析出溶度积关系

Figure 12. Relationship of solubility product of MnS precipitation and temperature during solidification process

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图 13 凝固过程中Cu₂S析出溶度积关系

Figure 13. Relationship of solubility product of Cu₂S precipitation and temperature during solidification process

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图 14 扫描电镜下的AlN析出物

Figure 14. SEM photos of AlN precipitates

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图 15 扫描电镜下的TiN析出物

Figure 15. SEM photos of TiN precipitates

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图 16 扫描电镜下的MnS析出物

Figure 16. SEM photos of MnS precipitates

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图 17 扫描电镜下的Cu₂S析出物

Figure 17. SEM photos of Cu₂S precipitates

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表 1 AlN、MnS在钢中的溶度积^[2−3]

Table 1. Solubility product of AlN and MnS in steel^[2−3]

化合物	K	Q	相
AlN	6.334-14069/T	[%Al][%N]	液相
MnS	4.63-8750/T	[%Mn][%S]	液相
AlN	5.37-14640/T	[%Al][%N]	δ相
AlN	2.27-10590/T	[%Mn][%S]	δ相
Cu₂S	26.31-44791/T	[%Cu]²[%S]	液相+δ相
TiN	5.56-17025/T	[%Ti][%N]	液相+δ相

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表 2 试验钢的主要化学成分

Table 2. Main chemical composition of the tested steel %

C	Mn	Si	S	P	Als	N	Ti	Cu
0.0019	0.32	2.72	0.0023	0.014	0.5016	0.0015	0.0026	0.046

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表 3 凝固过程中AlN、MnS参数选择^[3]

Table 3. Selection of AlN and MnS parameters during solidification process^[3]

Fe熔点/K	液相线		固相线		平衡溶质分配因数
Fe熔点/K	温度/K	（Si+Al)/%	温度/K	（Si+Al)/%	k_N	k_Al	k_S	k_Mn	k_Ti	k_Cu
1 809	1788	3.2	1768	3.2	0.28	0.92	0.1	0.74	0.3	0.9

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