铈对27%Cr超级铁素体不锈钢凝固组织影响机制研究
|
摘要
通过Factsage软件计算、宏观组织观察、扫描电镜分析等手段研究了Ce对27%Cr超级铁素体不锈钢凝固组织的影响。结果表明:未添加Ce钢中的夹杂物主要为Si-O-Mg-Al系夹杂及TiNb(CN)包裹Al_2O_3; Ce含量为0.05%时钢中形成弥散的高熔点Ce_2O_3和Ce_2O_2S,其作为非均质形核质点,使等轴晶比例增加,柱状晶变短变细,平均晶粒尺寸减小,凝固组织得到显著细化; Ce含量为0.07%时钢中的稀土化合物呈团簇状大量聚集。实验结果与Factsage计算预测基本吻合。
The effect of Ce on solidification microstructure of 27%Cr super ferritic stainless steel was studied by the calculation of the Factsage, macrostructure observation and SEM analysis. The results showed that the main inclusions in the steel without Ce are Si-O-Mg-Al system inclusions and Al_2O_3 covered by TiNb(CN); after adding 0.05% Ce, great amounts of high-melting point Ce-bearing inclusions(Ce_2O_3 and Ce_2O_2S) are formed, which increases the ratio of equiaxed crystal, shortens the columnar crystal, decreases the average grain size, and refines the solidification structure; after adding 0.07% Ce, massive Ce-bearing inclusions gather which is cluster shaper. The experimental results are consistent with the calculation of the Factsage.
The effect of Ce on solidification microstructure of 27%Cr super ferritic stainless steel was studied by the calculation of the Factsage, macrostructure observation and SEM analysis. The results showed that the main inclusions in the steel without Ce are Si-O-Mg-Al system inclusions and Al_2O_3 covered by TiNb(CN); after adding 0.05% Ce, great amounts of high-melting point Ce-bearing inclusions(Ce_2O_3 and Ce_2O_2S) are formed, which increases the ratio of equiaxed crystal, shortens the columnar crystal, decreases the average grain size, and refines the solidification structure; after adding 0.07% Ce, massive Ce-bearing inclusions gather which is cluster shaper. The experimental results are consistent with the calculation of the Factsage.
引文
[1] 蔡国君. 铈对202不锈钢的组织和性能影响规律研究 [D]. 包头: 内蒙古科技大学, 2010.Cai G J. Effect of Rare-Earth Ce on the Microstructure and Properties of 2Cr13 Stainless Steel [D]. Baotou: Inner Mongolia University of Science and Technology, 2010.
[2] 王晓峰, 陈伟庆, 郑宏光. 铈对超级双相不锈钢凝固组织的影响 [J]. 中国稀土学报, 2008, 26(6): 734.Wang X F, Chen W Q, Zheng H G. Influence of cerium on solidification structure of super duplex stainless steel [J]. Journal of the Chinese Society of Rare Earths, 2008, 26(6): 734.
[3] 富晓阳, 杨吉春, 杨强. 铈对T91钢冲击韧性的影响 [J]. 中国稀土学报, 2017, 35(4): 509.Fu X Y, Yang J C, Yang Q. Effect of cerium on impact toughness of T91 steel [J]. Journal of the Chinese Society of Rare Earths, 2017, 35(4): 509.
[4] 王龙妹, 徐彪, 朱京希. 稀土对430铁素体不锈钢凝固组织和性能的影响 [C]. 中国工程院化工·冶金与材料工程学部学术会议, 济南, 2007. 439.Wang L M, Xu B, Zhu J X. Effect of Rare Earth on solidification Microstructure and Properties of 430 Ferritic stainless Steel [C]. Academic Conference of Chemical, Metallurgy & Materials Engineering, China Engineering Institute, Jinan, 2007. 439.
[5] Zang S H, Yu Y C, Wang S B, LI H. Effects of cerium addition on solidification structure and mechanical properties of 434 ferritic stainless steel [J]. J. Rare Earths, 2017, 35(5): 518.
[6] 顾玥, 詹肇麟, 荣凡. 铌、 钛对445M铁素体不锈钢韧性的影响 [J]. 钢铁研究学报, 2012, 24(1): 31.Gu Y, Zhan Z L, Rong F. Effect of Nb and Ti on the toughness of 445M ferritic stainless steel [J]. Journal of Iron and Steel Research. , 2012, 24(1): 31.
[7] 刘浩. 晶粒细化剂对430L铁素体不锈钢微观组织的影响研究 [D]. 沈阳: 东北大学, 2014.Liu H. Influence of Grain Refiners on the Microstructure of 430L Ferritic Stainless Steel [D]. Shenyang: Northeastern University, 2014.
[8] Thewlis G. Effect of cerium sulphide particle dispersions on acicular ferrite microstructure development in steels [J]. Mater. Sci. J., 2006, 22(2): 153.
[9] 于彦冲, 陈伟庆, 郑宏光. 铈及混合稀土对Fe-36Ni低膨胀合金凝固组织的影响 [J]. 中国稀土学报, 2012, 30(2): 175.Yu Y C, Chen W Q, Zheng H G. Effect of cerium and mischmetal on solidification structure of Fe-36Ni invar alloy [J]. Journal of the Chinese Society of Rare Earths, 2012, 30(2): 175.
[10] Gao J Z, Fu P X, Liu H W, Li D Z. Effects of rare earth on the microstructure and impact toughness of H13 steel [J]. Metals, 2015, 5(1): 383.
[11] Yao B, Ding B Z, Sui G L, Wang A M, Hu Z Q. Effect of high pressure on the preparation of Pd-Si-Cu bulk nanocrystalline material [J]. J. Mater. Res., 1996, 11(4): 912.
[12] Hunt J D. Steady state columnar and equiaxed growth of dendrites and eutectic [J]. Mater. Sci. Eng., 1984, 65(1): 75.
[13] 刘静, 罗兴宏, 胡小强, 刘实. Ti和Nb微合金化对超纯11%Cr铁素体不锈钢组织的影响 [J]. 金属学报, 2011, 47(6): 688.Liu J, Luo X H, Hu X Q, Liu S. Effect of Ti and Nb micro-alloying on the microstructure of the ultra-purified 11%Cr ferrite stainless steels [J]. Acta Metallurgica Sinca, 2011, 47(6): 688.
[2] 王晓峰, 陈伟庆, 郑宏光. 铈对超级双相不锈钢凝固组织的影响 [J]. 中国稀土学报, 2008, 26(6): 734.Wang X F, Chen W Q, Zheng H G. Influence of cerium on solidification structure of super duplex stainless steel [J]. Journal of the Chinese Society of Rare Earths, 2008, 26(6): 734.
[3] 富晓阳, 杨吉春, 杨强. 铈对T91钢冲击韧性的影响 [J]. 中国稀土学报, 2017, 35(4): 509.Fu X Y, Yang J C, Yang Q. Effect of cerium on impact toughness of T91 steel [J]. Journal of the Chinese Society of Rare Earths, 2017, 35(4): 509.
[4] 王龙妹, 徐彪, 朱京希. 稀土对430铁素体不锈钢凝固组织和性能的影响 [C]. 中国工程院化工·冶金与材料工程学部学术会议, 济南, 2007. 439.Wang L M, Xu B, Zhu J X. Effect of Rare Earth on solidification Microstructure and Properties of 430 Ferritic stainless Steel [C]. Academic Conference of Chemical, Metallurgy & Materials Engineering, China Engineering Institute, Jinan, 2007. 439.
[5] Zang S H, Yu Y C, Wang S B, LI H. Effects of cerium addition on solidification structure and mechanical properties of 434 ferritic stainless steel [J]. J. Rare Earths, 2017, 35(5): 518.
[6] 顾玥, 詹肇麟, 荣凡. 铌、 钛对445M铁素体不锈钢韧性的影响 [J]. 钢铁研究学报, 2012, 24(1): 31.Gu Y, Zhan Z L, Rong F. Effect of Nb and Ti on the toughness of 445M ferritic stainless steel [J]. Journal of Iron and Steel Research. , 2012, 24(1): 31.
[7] 刘浩. 晶粒细化剂对430L铁素体不锈钢微观组织的影响研究 [D]. 沈阳: 东北大学, 2014.Liu H. Influence of Grain Refiners on the Microstructure of 430L Ferritic Stainless Steel [D]. Shenyang: Northeastern University, 2014.
[8] Thewlis G. Effect of cerium sulphide particle dispersions on acicular ferrite microstructure development in steels [J]. Mater. Sci. J., 2006, 22(2): 153.
[9] 于彦冲, 陈伟庆, 郑宏光. 铈及混合稀土对Fe-36Ni低膨胀合金凝固组织的影响 [J]. 中国稀土学报, 2012, 30(2): 175.Yu Y C, Chen W Q, Zheng H G. Effect of cerium and mischmetal on solidification structure of Fe-36Ni invar alloy [J]. Journal of the Chinese Society of Rare Earths, 2012, 30(2): 175.
[10] Gao J Z, Fu P X, Liu H W, Li D Z. Effects of rare earth on the microstructure and impact toughness of H13 steel [J]. Metals, 2015, 5(1): 383.
[11] Yao B, Ding B Z, Sui G L, Wang A M, Hu Z Q. Effect of high pressure on the preparation of Pd-Si-Cu bulk nanocrystalline material [J]. J. Mater. Res., 1996, 11(4): 912.
[12] Hunt J D. Steady state columnar and equiaxed growth of dendrites and eutectic [J]. Mater. Sci. Eng., 1984, 65(1): 75.
[13] 刘静, 罗兴宏, 胡小强, 刘实. Ti和Nb微合金化对超纯11%Cr铁素体不锈钢组织的影响 [J]. 金属学报, 2011, 47(6): 688.Liu J, Luo X H, Hu X Q, Liu S. Effect of Ti and Nb micro-alloying on the microstructure of the ultra-purified 11%Cr ferrite stainless steels [J]. Acta Metallurgica Sinca, 2011, 47(6): 688.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |