Cr变质处理对金属锰凝固组织和有效形核的影响

doi:10.12034/j.issn.1009-606X.217164

过程工程学报 ›› 2017, Vol. 17 ›› Issue (6): 1291-1298.DOI: 10.12034/j.issn.1009-606X.217164

Cr变质处理对金属锰凝固组织和有效形核的影响

钱伟涛^1,2，王志²^*，钱国余²，谢克强¹，孙丽媛²，马文会¹

1. 昆明理工大学冶金与能源工程学院，云南昆明 650093； 2. 中国科学院过程工程研究所绿色过程与工程重点实验室，湿法冶金清洁生产技术国家工程实验室，北京 100190

收稿日期:2017-03-08 修回日期:2017-04-10 出版日期:2017-12-20 发布日期:2017-12-05
通讯作者: 王志 zwang@ipe.ac.cn
基金资助:
国家自然科学基金青年项目

Effect of Cr Modification on the Solidification Structure and Effective Nucleation of Metal Manganese

Weitao QIAN¹, Zhi WANG^2*, Guoyu QIAN², Keqiang XIE¹, Liyuan SUN², Wenhui MA¹

1. Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650093, China; 2. National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Key Lab. Green Process Eng., Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China

Received:2017-03-08 Revised:2017-04-10 Online:2017-12-20 Published:2017-12-05

摘要/Abstract

摘要： 采用电感耦合等离子体原子发射光谱仪、差热?热重分析仪和金相显微镜等检测手段研究了Cr加入量对金属锰凝固组织的影响. 结果表明，变质处理得到的金属锰凝固组织主要为柱状树枝晶，添加Cr有利于枝晶组织细化，Cr加入量由0增加至3.7%(?)时，金属锰平均晶粒尺寸先减小后增大，未变质时平均晶粒尺寸最大，为69.0 ?m；Cr加入量为2.0%(?)时，平均晶粒尺寸最小，仅为37.5 ?m；Cr加入量增至3.7%(?)时，平均晶粒尺寸增大至51.8 ?m. 熔体中有效异质形核质点数增加是导致金属锰凝固组织细化的主要原因.

关键词: 金属锰, 凝固组织, Cr加入量, 平均晶粒尺寸, 有效异质形核质点

Abstract: ICP-OES, DSC?TGA and metallographic microscope were used to study the effect of Cr addition on the solidification structure of metal manganese. The results showed that the solidification structure of metal manganese was mainly columnar dendrite after metamorphic treatment. However, the addition of Cr was beneficial to the refinement of dendritic structure. When the addition of Cr increased from 0 to 3.7%(?), the average grain size was first decreased and then increased. When the addition of Cr was 0, the average grain size of metal manganese was 69.0 ?m. However, with the addition of Cr increased to 2.0%(?), the average grain size reached the minimun, and it was only 37.5 ?m. Further increasing the addition of Cr to 3.7%(?), the average grain size would increase to 51.8 ?m. The increase of number of effective heterogeneous nuclei in melt was the main reason for solidification structure refinement of metal manganese.

Key words: metal manganese, solidification structure, addition of Cr, average grain size, the effective heterogeneous nuclei

钱伟涛王志钱国余谢克强孙丽媛马文会. Cr变质处理对金属锰凝固组织和有效形核的影响[J]. 过程工程学报, 2017, 17(6): 1291-1298.

Weitao QIAN Zhi WANG Guoyu QIAN Keqiang XIE Liyuan SUN Wenhui MA. Effect of Cr Modification on the Solidification Structure and Effective Nucleation of Metal Manganese[J]. Chin. J. Process Eng., 2017, 17(6): 1291-1298.

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Cr变质处理对金属锰凝固组织和有效形核的影响

Effect of Cr Modification on the Solidification Structure and Effective Nucleation of Metal Manganese

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