The Study on Vacuum Degassing Process of AlV55 Alloy
Abstract
Vacuum refining is admitted as an effective means to remove impurities in the process of alloy smelting. In this paper, Orthogonal and single factor experiments were carried out to investigate effects of multiple factors, such as superheat degree of the melt, degassing time and vacuum degree, on the vacuum refining process. The results showed that the best removal rate of oxygen and nitrogen is up to 82.71% and 61.3%, respectively, due to high vacuum degassing efficiency. It is found that the superheat degree is minimal impact on the deoxidization rate, in addition, nitrogen removal is controlled by the degassing time. The inclusions exist in the AlV55 alloy are mainly composed of oxides and vanadium-nitrogen compounds.
Keywords
Induction furnace Vanadium-aluminum Vacuum degassingPreview
Unable to display preview. Download preview PDF.
References
- 1.Z. Wen, “Vanadium resources and vanadium products at home and abroad market prospect of the analysis,” The World Non-Ferrous Metal, 11 (2001), 7–8.Google Scholar
- 2.D.C. Li et al., “Study on Production Technique for High Purity and Homogenous Al-V4 Master Alloy,” Light metals, 2 (2002), 57–59.CrossRefGoogle Scholar
- 3.P.Q. La et al., “Study on high grade vanadium-aluminum alloy prepared by aluminothermic reaction,” Power Metallurgy Technology, 5 (2012), 371–375.Google Scholar
- 4.M. Li, X.Q. Ming, “Probe into Measures to increase recovery in Vanadium Aluminum alloy smelting,” Ferro-Alloys, 4(2000), 11–13.Google Scholar
- 5.H.J. Chen, “Experimental Study on Two-step Synthesis of Vanadium-aluminum Alloy,” Iron Steel Vanadium Titanium, 6 (2012), 11–15.Google Scholar
- 6.G.Z. Liu et al., “Evaporation tendency of components in Ti-6Al-4V alloy melt,” Materials Science & Technology, 2 (2001), 175–177.Google Scholar
- 7.I. Suzukik et al., “Mold filling and solidification during centrifugal precision casting of Ti-6Al-4V alloy,” Materials Transaction, 37 (2) (1996), 1793–1799.Google Scholar
- 8.X.Y. Ding et al., “Thermodynamic calculation for alloy systems,” Metallurgical and Materials Transactions, 30 (1999), 271–277.CrossRefGoogle Scholar
- 9.H.J. Chen et al., “Vacuum Refining Experiment of Vanadium Aluminum Alloy,” Nonferrous Metals, 8 (2014), 48–50.Google Scholar
- 10.D.C. Li, Ferroalloy metallurgy (Beijing, Metallurgical Industry Press, 1991), 12.Google Scholar