钛对包晶钢铸态粗大柱状奥氏体晶粒细化的影响

安家志; 蔡兆镇; 朱苗勇

doi:10.1007/s12613-021-2375-2

Volume 29 Issue 12

Nov. 2022

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文章导航 > 矿物冶金与材料学报（英文版） > 2022 > 29(12) : 2172-2180. > DOI: 10.1007/s12613-021-2375-2

Cite this article as:

Jiazhi An, Zhaozhen Cai, and Miaoyong Zhu, Effect of titanium content on the refinement of coarse columnar austenite grains during the solidification of peritectic steel, Int. J. Miner. Metall. Mater., 29(2022), No. 12, pp.2172-2180. https://dx.doi.org/10.1007/s12613-021-2375-2

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研究论文

钛对包晶钢铸态粗大柱状奥氏体晶粒细化的影响

安家志^{1, 2),},
蔡兆镇^{1, 2), ,},
朱苗勇^{1, 2), ,}

1)
东北大学多金属共生矿生态化冶金教育部重点实验室, 沈阳 110819, 中国
2)
东北大学冶金学院, 沈阳 110819, 中国

通信作者:
蔡兆镇 E-mail: caizz@smm.neu.edu.cn

朱苗勇 E-mail: myzhu@mail.neu.edu.cn

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- 文章访问数: 1645
- HTML全文浏览量: 630
- PDF下载量: 83

文章亮点

(1) 设计了定向凝固实验装置模拟实际连铸坯表层组织生长状况。

(2) 系统的研究了凝固过程微米级及纳米级碳氮化钛的析出规律。

(3) 总结并提出了凝固过程Ti的碳氮化物对粗大柱状奥氏体的细化作用。

中文摘要

包晶微合金钢具有高强、高韧、易焊接等优良性能，广泛应用于石油化工、交通运输、海洋工程等领域。然而，包晶钢在连铸过程中常于铸坯表层生成粗大柱状奥氏体晶粒，是致使铸坯矫直过程形成角部横裂纹等质量缺陷的重要因素之一。本文采用快速定向凝固装置实验研究了Ti元素对包晶钢凝固过程铸态粗大柱状奥氏体细化的影响，并利用扫描与透射电镜分析了Ti的析出物在包晶钢凝固过程中的尺寸与分布规律。其研究结果表明，在包晶钢凝固过程中其奥氏体组织主要由粗大柱状奥氏体与细小柱状奥氏体组成，随着Ti含量的增加，粗大柱状奥氏体区域逐渐减小。当Ti含量增加至0.09wt%时，粗大柱状奥氏体完全消失。在凝固过程中，微米级别碳氮化钛将最先在液相中形成，从而降低细小柱状奥氏体向粗大柱状奥氏体不连续生长的转变温度。随着转变温度的降低，纳米级碳氮化钛将在奥氏体相中析出并钉扎晶界，从而细化包晶钢铸态奥氏体晶粒。

关键词:

Research Article

Effect of titanium content on the refinement of coarse columnar austenite grains during the solidification of peritectic steel

Jiazhi An^{1, 2),},
Zhaozhen Cai^{1, 2), ,},
Miaoyong Zhu^{1, 2), ,}

Author Affilications

1)
Key Laboratory for Ecological Metallurgy of Multimetallic Mineral (Ministry of Education), Northeastern University, Shenyang 110819, China
2)
School of Metallurgy, Northeastern University, Shenyang 110819, China

Corresponding author:
Zhaozhen Cai E-mail: caizz@smm.neu.edu.cn

Miaoyong Zhu E-mail: myzhu@mail.neu.edu.cn

Received: 17 July 2021; Revised: 02 November 2021; Accepted: 07 November 2021; Available online: 08 November 2021

Abstract:

The effect of titanium content on the refinement of austenite grain size in as-cast peritectic carbon steel was investigated by fast directional solidification experiments with simulating the solidification and growth of surface and subsurface austenite in continuously cast slabs. Transmission electron microscope (TEM) and scanning electron microscope (SEM) were used to analyze the size and distribution of Ti(C,N) precipitates during solidification. Based on these results, the pinning pressure of Ti(C,N) precipitates on the growth of coarse columnar grains (CCGs) was studied. The results show that the austenite microstructure of as-cast peritectic carbon steel is mainly composed of the regions of CCGs and fine columnar grains (FCGs). Increasing the content of titanium reduces the region and the short axis of the CCGs. When the content of titanium is 0.09wt%, there is no CCG region. Dispersed microscale particles will firstly form in the liquid, which will decrease the transition temperature from FCGs to CCGs. The chain-like nanoscale Ti(C,N) will precipitate with the decrease of the transition temperature. Furthermore, calculations shows that the refinement of the CCGs is caused by the pinning effect of Ti(C,N) precipitates.

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参考文献(27)

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施引文献(10)

Citing articles(10)

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2.	Peng Liu, Zhaozhen Cai, Miaoyong Zhu. Effects of sulphur content and cooling rate on the precipitation characteristics of MnS in high-sulphur peritectic steel. Ironmaking & Steelmaking: Processes, Products and Applications, 2024. 必应学术
3.	Jun Wang, Man Liu, Lifan Wang, et al. Austenite Growth Behavior and Prediction Modeling of Ti Microalloyed Steel. Materials, 2024, 17(13): 3236. 必应学术
4.	Quanhui Li, Peng Lan, Haijie Wang, et al. Formation and control of the surface defect in hypo-peritectic steel during continuous casting: A review. International Journal of Minerals, Metallurgy and Materials, 2023, 30(12): 2281. 必应学术
5.	Miaoyong Zhu, Zhaozhen Cai. Formation Mechanism and Control Technology of Transverse Corner Cracks During Slab Continuous Casting of Microalloyed Steels. steel research international, 2023, 94(12) 必应学术
6.	Haohao Zhang, Lihua Wan, Mujun Long, et al. Quantitative Investigation on the Evolution of Ti(Cx, N1−x) in Ultra-high-Strength Steel Slab During TSCR Process: Precipitation and Redissolution. Metallurgical and Materials Transactions B, 2023, 54(5): 2492. 必应学术
7.	Kaiyang Wang, Shaojie Lv, Honghui Wu, et al. Recent research progress on the phase-field model of microstructural evolution during metal solidification. International Journal of Minerals, Metallurgy and Materials, 2023, 30(11): 2095. 必应学术
8.	Yong Wang, Sohei Sukenaga, Hiroyuki Shibata, et al. Combination of In Situ Confocal Microscopy and Calorimetry to Investigate Solidification of Super‐ and Hyper‐Duplex Stainless Steels. steel research international, 2023, 94(11) 必应学术
9.	Ze-Ju Bao, Hong-Yu Yang, Bai-Xin Dong, et al. Development Trend in Composition Optimization, Microstructure Manipulation, and Strengthening Methods of Die Steels under Lightweight and Integrated Die Casting. Materials, 2023, 16(18): 6235. 必应学术
10.	Jiazhi An, Zhaozhen Cai, Miaoyong Zhu. Role of Ti on the Growth of Coarse Columnar Austenite Grain During Nb-Bearing Peritectic Steel Solidification. Metallurgical and Materials Transactions A, 2022, 53(4): 1540. 必应学术

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Quanhui Li, Peng Lan, Haijie Wang, et al. Formation and control of the surface defect in hypo-peritectic steel during continuous casting: A review. International Journal of Minerals, Metallurgy and Materials, 2023, 30(12): 2281. 必应学术
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Haohao Zhang, Lihua Wan, Mujun Long, et al. Quantitative Investigation on the Evolution of Ti(Cx, N1−x) in Ultra-high-Strength Steel Slab During TSCR Process: Precipitation and Redissolution. Metallurgical and Materials Transactions B, 2023, 54(5): 2492. 必应学术
Kaiyang Wang, Shaojie Lv, Honghui Wu, et al. Recent research progress on the phase-field model of microstructural evolution during metal solidification. International Journal of Minerals, Metallurgy and Materials, 2023, 30(11): 2095. 必应学术
Yong Wang, Sohei Sukenaga, Hiroyuki Shibata, et al. Combination of In Situ Confocal Microscopy and Calorimetry to Investigate Solidification of Super‐ and Hyper‐Duplex Stainless Steels. steel research international, 2023, 94(11) 必应学术
Ze-Ju Bao, Hong-Yu Yang, Bai-Xin Dong, et al. Development Trend in Composition Optimization, Microstructure Manipulation, and Strengthening Methods of Die Steels under Lightweight and Integrated Die Casting. Materials, 2023, 16(18): 6235. 必应学术
Jiazhi An, Zhaozhen Cai, Miaoyong Zhu. Role of Ti on the Growth of Coarse Columnar Austenite Grain During Nb-Bearing Peritectic Steel Solidification. Metallurgical and Materials Transactions A, 2022, 53(4): 1540. 必应学术

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