Protecting Melted Zinc-Aluminium based Foundry Alloys Against Hydrogen Pick-Up

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Abstract

The paper is devoted to examinations of the refining efficiency of fluxes and refiners applied during melting of zinc and zinc-aluminium alloys. The content of gases, mainly hydrogen, in the alloys not protected during the charge melting and in the ones protected with the fluxes and/or refined is discussed. The performed examinations show that using the protecting fluxes and melt-refining before pouring leads to significant improvement of ductility in Zn and binary Zn-Al alloys as well as significant increase of the material clearness confirmed by increased density. Furthermore, the metallurgical yields are also increased.

[1] W. Krajewski, The Effect of Ti Addition on Properties of Selected Zn-Al Alloys, Physica Status Solidi A - Applied Research 147, 389-399 (1995).

[2] W. Krajewsk i, Phases of Heterogeneous Nucleation in the Zn Al25 Alloy Modified by Zn-Ti and Al-Ti Master Alloys, Zeitschrift fur Metallkunde 87, 645-651 (1996).

[3] W.K. Krajewsk i, Determination of Al Site Preference in L12 Ti Zn3 - base Trialuminides, Materials Science Forum 508, 615-620 (2006).

[4] W.K. Krajewski, A.L. Greer, EBSD Study of Zn Al25 Alloy Inoculated with Zn Ti4 Master Alloy, Materials Science Forum 508, 281-286 (2006).

[5] K. Haberl, W.K. Krajewski, P. Schumacher, Microstructural Features of the Grain-refined Sand Cast Al Zn20 Alloy, Archives of Metallurgy and Materials 55, 837-841 (2010).

[6] T. Wróbel, J. Szajna r, Modification of Pure Al and Al Si2 Alloy Primary Structure with use of Electromagnetic Stirring Method, Archives of Metallurgy and Materials 58, 955-958 (2013).

[7] J. Campbell, Castings, Butterworth-Heinemann, 1997.

[8] W.K. Krajewski, Efficacy of New Agents for Melt-refining and Grain-refining of Zn and Zn Al-base Alloys, Metallurgy and Foundry Engineering 21, 233-237 (1995).

[9] W.K. Krajewsk i, The Alloys of Zinc with Aluminium. Types, properties, usage, AKAPIT, Krakow 2013, (in Polish).

[10] W.A. Keczin, E.J. Lublinskij, Zinc Alloys, Mietallurgija, Moskwa 1986 (in Russian).

[11] S. Rzadkosz, C. Adamsk i, Synthetic Fluxes for Zinc Alloys, Foundry Review - Przeglad Odlewnictwa, 12, 341-343 (1996) (in Polish).

[12] J. Campbell, R.A. Hardin g, IRCin Materials, EAA - European Aluminium Association, 1994.

[13] K.M. Mac Ka y, Hydrogen Compounds of Metallic Elements, John Wiley & Sons, Incorporated, 1973.

[14] S. Rzadkosz, W. Krok, Technological and Ecological Problems of Melting and Refining Zinc Alloys, Proceedings of the II International Conference Modern Foundry Technologies - Environmental Protection, Krakow, 55-59, (1997) (in Polish).

[15] R.J. Barnhurst, Zinc and Zinc Alloys, ASM Handbook, Volume 2, Properties and Selection, Nonferrous Alloys and Special-Purpose Materials, ASM International, 527-542 (1990).

Archives of Metallurgy and Materials

The Journal of Institute of Metallurgy and Materials Science and Commitee on Metallurgy of Polish Academy of Sciences

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