The Study on TiAl Based Alloy Blade Casting Structure by Bottom Pouring Vacuum Suction Casting

Abstract:

In this paper, the bottom pouring vacuum suction casting is used, and the TiAl-based alloy blade with good face quality was obtained. Bottom pouring vacuum suction casting obtained Ti-47Al-5Nb-0.5Si alloy fine structure, the average grain size is 20um or less. Metal permanent forced cooling effect increases the undercooling degree, and the formation of Ti5Si3 can hinder the grain growth and the formation of nucleation particles, and Nb elements are conducive to the formation of B2 phase, and these three reasons refined the grain size.

• Periodical: Applied Mechanics and Materials (Volume 442)
• Pages: 44-47
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.442.44
• Online since: October 2013
• Authors: Xi Cong Ye*, Wei Guang Zhao
• Keywords: Steel Mold, Structure, Suction Casting, TiAl Based Alloy

References

[1] T. Noda, M. Okabe, S. Isobe and M. Sayashi. Silicide Precipitation Strengthen TiAl[J]. Mater. Sci. Eng. A Vol. 192/193(1995), p.774.

DOI: 10.1016/0921-5093(94)03313-7

[2] J. Beddoes, D.Y. Seo and H. Saari. Long term creep of TiAl + W + Si with polycrystalline and columnar grain structures [J]. Scripta mater. Vol. 52(2005), p.745.

DOI: 10.1016/j.scriptamat.2004.12.016

[3] J. Lapin. Creep behavior of a cast intermetallic Ti-45. 2Al-2W-0. 6Si-0. 7B alloy[J]. Scripta mater. Vol. 50(2004), p.261.

DOI: 10.1016/j.scriptamat.2003.10.003

[4] S. Y. Sung and Y. J. Kim. Economic Net~Shape Forming of TiAl Alloys for Automotive Parts[J]. Intermetallics. Vol. 14(2006), p.1163.

DOI: 10.1016/j.intermet.2005.11.025

[5] S. L. Xiao, J. Tian, L. J Xu, et al. Microstructures and Mechanical Properties of TiAl Alloy Prepared by Spark Plasma sintering[J]. Transactions of Nonferrous Metals Society of China Vol. 19(2009), p.1423.

DOI: 10.1016/s1003-6326(09)60044-3

[6] J. Moll and B. Mctiernan. P M TiAl Alloys: the Sky's the Limit[J]. Metal Powder Report Vol. 55(2000), p.18.

DOI: 10.1016/s0026-0657(00)87337-3

[7] F.H. Zhi, D.H. Sheng, C.R. Run. etal. Directional Solidification Technology Based on Electromagnetic Cold Crucible to Prepare TiAl Intermetallics[J]. Rare Metal Materials and engineering. Vol. 37(2008), p.565.

[8] Y.Q. Yan, Z.Q. Zhang, G. Z. Luo, et al. Microstructure Observation and Compressing Tests of TiAl Based Alloys Containing High Nb[J]. Mater. Sci. Eng. A Vol. 280(2000), p.187.

[9] P.X. Fu, X.H. Kang, Y.C. Ma, et al. Centrifugal casting of TiAl exhaust valves[J]. Intermetallics Vol. 16(2008), p.130.

DOI: 10.1016/j.intermet.2007.08.007

[10] A. Sankaran, E. Bouzy, J.J. Fundenberger and A. Hazotte. Texture and microstructure evolution during tempering of gamma-massive phase in a TiAl-based alloy[J]. Intermetallics Vol. 17 (2009), p.1007.

DOI: 10.1016/j.intermet.2009.05.001

[11] T. Noda. Application of Cast Gamma TiAl for Automobiles[J]. Intermetallics Vol. 6(2008), p.709.

DOI: 10.1016/s0966-9795(98)00060-0