Abstract：The sample preparation and micro-zone phase identification were two challenges for the detection and characterization of complex inclusions of steel materials. The samples of complex inclusions for transmission electron microscope (TEM) profile characterization were in-situ prepared by the accurate positioning function of focused ion beam(FIB). The morphologies of multi-phases in inclusions could be mostly presented. The surface analysis function of energy disperse spectroscopy (EDS) and the crystal structure analysis technique of TEM were also used for the comprehensive characterization of complex inclusions. The phase composition of complex inclusions was finally obtained by the component analysis of inclusions as well as the calibration of phase diffraction pattern. The results indicated that the morphology and composition of complex inclusions were very complicated, including the crystalline state Mn2TiO4 phase, MgAl2O4 phase, Mn0.33Zr0.33Ti0.33O1.67 phase and amorphous Ca-Al silicate phase.
曾光廷,李静缓,罗学厚. 非金属夹杂物与钢的韧性研究[J]. 材料科学与工程,2000,18(2):87-90. ZENG Guang-ting, LI Jing-huan, LUO Xue-hou. Study on the non-metallic inclusion and toughness of steels[J]. Materials Science and Engineering, 2000,18(2):87-90.
[2]
Xue H B,Cheng Y F. Characterization of inclusions of X80 pipeline steel and its correlation with hydrogen-induced cracking[J]. Corrosion Science,2011,53(4):1201-1208.
[3]
Ramirez J E. Characterization of high-strength steel weld metals:chemical composition,microstructure,and nonmetallic inclusions[J]. Welding Journal,2008,87(3):65-75.
[4]
Chen Y T,Chen X,Ding Q F,et al. Microstructure and inclusion characterization in the simulated coarse-grain heat affected zone with large heat input of a Ti-Zr-microalloyed HSLA steel[J]. Acta Metallurgica Sinica,2005,18(2):96-106.
[5]
Fernandes M,Cheung N,Garcia A. Investigation of nonmetallic inclusion in continuously cast carbon steel by dissolution of the ferritic matrix[J]. Materials Characterization,2002,48(4):255-261.
[6]
Zhang D,Terasaki H,Komizo Y. In situ observation of the formation of intragranular acicular ferrite at non-metallic inclusions in C-Mn steel[J]. Acta Materialia,2010,58(4):1369-1378.
[7]
张毅,缪乐德,王国栋,等. 低合金钢中非金属夹杂物的综合表征[J]. 冶金分析,2011,31(7):1-12. ZHANG Yi, MIAO Le-de, WANG Guo-dong, et al. Synthetical characterization ion of non-metallic inclusion in low alloy steel[J]. Metallurgical Analysis, 2011,31(7):1-12.
[8]
胡德新,赵江勇,金宝炎,等. 低合金钢中非金属夹杂物的检测与表征[J]. 冶金分析,2014,34(1):17-21. HU De-xin, ZHAO Jiang-yong, JIN Bao-yan, et al. Determination and characterization of non-metallic inclusions in low alloy steel[J].Metallurgical Analysis,2014,34(1):17-21.
[9]
齐江华,吴杰,索进平,等. 钢中细小夹杂物的研究方法探讨[J]. 冶金分析,2010,30(10):1-5. QI Jiang-hua, WU Jie, SUO Jin-ping, et al. Discussion on the research method of fine inclusions in steel[J]. Metallurgical Analysis,2010,30(10):1-5.
[10]
王国承,邓庚凤. 钢中夹杂物研究的新方法及其应用[J]. 江西理工大学学报,2008,29(5):51-54.WANG Guo-cheng, DENG Geng-feng. New analysis method on inclusions in steel and application[J]. Journal of Jiangxi University of Science and Technology,2008,29(5):51-54.
[11]
杨平. 电子背散射衍射技术及其应用[M]. 北京:冶金工业出版社,2007:127.
[12]
Takada A,Komizo Y,Terasaki H,et al. Crystallographic analysis for acicular ferrite formation in low carbon steel weld metals[C]//The Japan Institute of Welding Conference Symposium,2013,31(1):33-40.
