GH5188合金凝固过程动态原位观察研究

蒋世川; 张健; 裴丙红; 陈琦; 王福

doi:10.7513/j.issn.1004-7638.2023.03.020

GH5188合金凝固过程动态原位观察研究

doi: 10.7513/j.issn.1004-7638.2023.03.020

蒋世川^{1, 2,},
张健^{1, 2},
裴丙红³,
陈琦^{1, 2},
王福³

1.
成都先进金属材料产业技术研究院股份有限公司, 四川成都 610303
2.
海洋装备用金属材料及其应用国家重点实验室, 辽宁鞍山 114009
3.
攀钢集团江油长城特殊钢有限公司, 四川江油 621704

详细信息

作者简介:
蒋世川，1984年出生，男，高级工程师，主要从事高温合金、耐蚀合金等产品的开发及制备工艺技术研究，E-mail：jsc8410@163.com

中图分类号: TF76,TG244
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- 被引次数: 0
出版历程
- 收稿日期: 2022-07-21
- 刊出日期: 2023-06-30

Dynamic in-situ observation of solidification process of GH5188 alloy

Jiang Shichuan^{1, 2
,},
Zhang Jian^{1, 2},
Pei Binghong³,
Chen Qi^{1, 2},
Wang Fu³

1.
Chengdu Institute of Advanced Metallic Material Technology and Industry Co., Ltd. Chengdu 610303, Shichuan, China
2.
State Key Laboratory of Metal Material for Marine Equipment and Application, Liaoning Anshan 114009
3.
Pangang Group Jiangyou Changcheng Special Steel Co., Ltd., Jiangyou 621704, Sichuan, China

摘要

摘要: 利用高温共聚焦激光扫描显微镜对GH5188合金在冷速为10~200 ℃/min条件下的凝固过程进行动态原位观察，并研究了冷速对GH5188合金凝固过程、凝固组织及析出相的影响。结果表明，GH5188合金的凝固过程为缓慢凝固-快速凝固-缓慢凝固过程，冷速越大，峰值凝固速度越大。冷速影响合金凝固温度，随着冷速的增加，凝固温度逐渐降低，冷速的增加使合金凝固后二次枝晶间距减小，析出相尺寸更均匀细小，有利于减少合金凝固过程的裂纹敏感性，获得了不同冷速下合金二次枝晶间距的预测公式。
- GH5188 /
- 高温共聚焦激光扫描显微镜 /
- 凝固 /
- 原位观察 /
- 冷速
Abstract: The solidification process of the GH5188 alloy at cooling rates of 10-200 ℃/ min was dynamically in-situ observed by high-temperature confocal laser scanning microscopy (CLSM). The effects of cooling rates on the solidification process, structure and precipitates of the GH5188 alloy were studied. The results show that the solidification process for the GH5188 alloy is slow-rapid-slow solidification. The higher the cooling rate, the greater the peak solidification rate is obtained. The cooling rate affects the solidification temperature of the alloy, and the solidification temperature decreases with the increase in the cooling rate. With the increase in cooling rate, the secondary dendrite arm spacing of the alloy after solidification decreases. The size of precipitates is more uniform and refined, which is conducive to reducing the crack sensitivity of the alloy during solidification. The secondary dendrite arm spacing prediction formula is obtained under different cooling rates.
- GH5188 /
- CLSM /
- solidification /
- in-situ observation /
- cooling rate

HTML全文

图 1 GH5188合金凝固动力学曲线

Figure 1. The solidification kinetics curve of GH5188 alloy

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图 2 GH5188合金动态原位观察加热、保温及冷却制度

Figure 2. Dynamic in situ observation of heating system, heat preservation system and cooling system of GH5188 alloy

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图 3 GH5188合金凝固过程的动态原位图

Figure 3. Dynamic in situ observation of solidification process of GH5188 alloy

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图 4 GH5188高温不同冷速下的凝固过程

Figure 4. Solidification process of GH5188 alloy at different cooling rates

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图 5 不同冷速与凝固温度的关系

Figure 5. Relationship between different cooling rates and solidification temperature

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图 6 不同冷速液相面积分数与温度的关系

Figure 6. Relationship between liquid area fraction and temperature at different cooling rates

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图 7 不同冷速凝固过程中各时刻的凝固速度

Figure 7. Solidification rates at different cooling rates during solidification

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图 8 GH5188合金不同冷速下的凝固组织

Figure 8. Solidification microstructures of GH5188 alloy at different cooling rates

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图 9 不同冷速下GH5188合金二次枝晶间距的变化

Figure 9. Variation of the secondary dendrite arm spacing at different cooling rates of GH5188 alloy

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图 10 不同冷速的析出相SEM形貌

Figure 10. SEM morphologies of precipitates at different cooling rates

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图 11 不同冷速下析出相面积占比

Figure 11. Proportion of precipitated phase area at different cooling rates

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图 12 不同冷速下析出相EDS分析

Figure 12. EDS analysis of precipitates at different cooling rates

(a) 50 ℃/min；(b) 100 ℃/min；(c) 150 ℃/min；(d) 200 ℃/min

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表 1 GH5188合金化学成分

Table 1. Chemical composition of GH5188 alloy %

C Mn Si Cr Ni W La B Fe Co

0.05～0.15 ≤1.25 0.20～0.50 20～24 20～24 13～16 0.02～0.12 ≤0.015 ≤3.0 余量

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