Effect Mechanism of TiAl3 on the Precipitation of TiC Particles in Aluminum Melt
DING Wan-wu1,2, XIA Tian-dong1,2, ZHAO Wen-jun1,2
1. State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials, Lanzhou University of Technology, Lanzhou 730050, China;
2. Key Laboratory of Non-ferrous Metal Alloys(Ministry of Education), Lanzhou University of Technology, Lanzhou 730050, China
Abstract：The effect of TiAl3 on the precipitation of TiC particles in aluminum melt was studied when TiC and TiAl3 refining industry aluminum, and the mechanism was discussed using MEF3 and EPMA. The results show that TiC particles deposit quickly and have poor nucleation capability when TiC is used as the α(Al) nucleation phase only, but when TiC and TiAl3 common as the α(Al) nucleation phase, TiC particles deposit more and more slow. Even after long time, there was only a small amount of precipitation. It demonstrated better nucleation and higher resistance to grain refining fading. The reason is that TiAl3 increase the settlement resistance of TiC particles. The refinement effect fading of Al-Ti-C master alloy is caused by TiC precipitation.
[1] McCARTNEY D G. Grain refining of aluminium and its alloys using inoculants[J]. International Materials Reviews, 1989, 34(5):247-260.[2] MURTY B S, KORI S A, CHAKRABORTY M. Grain refinement of aluminium and its alloys by heterogeneous nucleation and alloying[J]. International Materials Reviews, 2002, 47(1):3-29.[3] JONES G, PEARSON J. Factors affecting the grain-refinement of aluminum using titanium and boron additives[J]. Metallurgical and Materials Transactions, 1976, 7(2):223-234.[4] BUNN A M, SCHUMACHER P, KEARNS M A, et al. Grain refinement by Al-Ti-B alloys in aluminium melts a study of the mechanisms of poisoning by zirconium[J]. Materials Science and Technology, 1999, 15(10):1115-1123.[5] LI H, SRITHARAN T, SEOW H P. Grain refinement of DIN226 alloy at high titanium and boron inoculation levels[J]. Scripta Materialia, 1996, 35(7):869-872.[6] 高泽生. Al-Ti-C 晶粒细化用中间合金的最新进展[J].轻合金加工技术,1998,26(10):5-11.GAO Ze-sheng. Recent development of Al-Ti-C grain refining master alloys[J].Light Alloys Pressing Technology,1998,26(10):5-11.[7] LI Jian-guo, HUANG Min, MA Mo, et al. Performance comparison of AlTiC and AlTiB master alloys in grain refinement of commercial and high purity aluminum[J].Transactions of Nonferrous Metals Society of China, 2006, 16(2):243-253.[8] LIU Xiang-fa, WANG Zhen-qing. The relationship between microstructures and refining performances of Al-Ti-C master alloys[J]. Mater Sci Eng A, 2002, A332: 70-74.[9] WANG Zhen-qing, LIU Xiang-fa, LIU Yan-hui, et al. Structural heredity of TiC and its influences on refinement behaviors of AlTiC master alloy[J]. Trans Nonferrous Met Soc China, 2003, 13(4): 790-793.[10] 李英龙,温景林,陈彦博,等. SHS 技术制备Al-3Ti-0.15C 晶粒细化剂[J].中国有色金属学报,2004, 14(2):179-183. LI Ying-long, WEN Jing-ling, CHEN Yan-bo, et al.Al-3Ti-0.15C grain refiner prepared by SHS[J]. The Chinese Journal of Nonferrous Metals, 2004, 14(2):179-183.[11] 赵文军,丁万武,夏天东,等.A1-Ti-C中间合金制备方法及细化机理研究现状[J].铸造技术,2008, 29(11):1559-1562. ZHAO Wen-jun, DING Wan-wu, XIA Tian-dong,et al. Research status and development trend of preparation of Al-Ti-C master alloy[J]. Foundry Technology,2008,29(11): 1559-1562.[12] IQBAL N, Van DIJK N H, OFFERMAN S E, et al. In situ investigation of the crystallization kinetics and the mechanism of grain refinement in aluminum alloys[J]. Mater Sci Eng A, 2006, A416: 18-32.[13] 肖政兵,邓运来,唐建国,等.Al-Ti-C与Al-Ti-B晶粒细化剂Zr中毒机理[J].中国有色金属学报,2012, 22(6):371-378. XIAO Zheng-bing, DENG Yun-lai, TANG Jian-guo, et al. Poisoning mechanism of Zr on grain refiner of Al-Ti-C and Al-Ti-B[J].The Chinese Journal of Nonferrous Metals, 2012,22(6): 371-378.[14] 王淑俊. 含 Zr 铝合金的细化"中毒"现象及其细化新工艺研究. 济南: 山东大学, 2009.1-69.[15] 夏天东,丁万武,赵文军,等. TiAl3对TiC粒子在铝基体中分布及α(Al)晶粒形核的影响[J].中国有色金属学报, 2009, 19(11):1948-1955. XIA Tian-dong, DING Wan-wu, ZHAO Wen-jun,et al. Effect of distribution of TiC in aluminum matrix in the presence of solute TiAl3 and nucleation mechanism of Al-Ti-C[J].The Chinese Journal of Nonferrous Metals, 2009,19(11): 1948-1955.[16] 丁万武,夏天东,赵文军,等.中间合金中第二相粒子TiC和TiAl3对纯铝的细化作用[J].中国有色金属学报, 2009, 19(6):1025-1031. DING Wan-wu, XIA Tian-dong, ZHAO Wen-jun,et al. Research on refining performances of TiC and TiAl3 phases in mast alloys for commercially aluminum[J].The Chinese Journal of Nonferrous Metals, 2009,19(6): 1025-1031.[17] 严有为,刘生发,范晓明,等.自蔓延高温合成Al-TiC晶粒细化剂及其晶粒细化效果[J].中国有色金属学报, 2002, 12(5):977-981. YAN You-wei, LIU Sheng-fa, FAN Xiao-ming,et al. SHS of Al-TiC grain refiners and their grain refining performances for commercially pure aluminum[J].The Chinese Journal of Nonferrous Metals, 2002,12(5): 977-981.[18] 刘相法,边秀房,薛佩军,等.TiAl3在铝熔体中结构遗传的动力学研究[J].机械工程学报,1999,35(3):67-71. LIU Xiang-fa, BIAN Xiu-fang , XUE Pei-jun,et al. Structure hereditary dynamics of TiAl3 in Al melt[J]. Chinese Journal of Mechanical Engineering, 1999,35(3):67-71.[19] 吴德海,任家列,陈森灿.近代材料加工原理[M].北京:清华大学出版社,1997.178-179.[20] YU Li-na, LIU Xiang-fa. Ti transition zone on the interface between TiC and aluminum melt and its influence on melt viscosity[J]. Journal of Materials Processing Technology, 2007,182:519-524.
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