Specialized metallurgical processes – compositions for use therei – Processes – Producing or treating free metal
Patent
1991-07-26
1992-09-15
Andrews, Melvyn J.
Specialized metallurgical processes, compositions for use therei
Processes
Producing or treating free metal
75603, C22B 2622
Patent
active
051474506
ABSTRACT:
Hydrogen is essentially removed from molten magnesium by the use of a degassing step, thereby substantially avoiding the formation of zirconium hydride when zirconium and silicon are added to the molten magnesium, after the degassing, in order to precipitate iron contamination in the magnesium as an intermetallic compound comprising Fe, Zr, and Si; the ratio of the three metals in the intermetallic compound can vary over a wide range. By essentially avoiding the formation of slow-settling insoluble ZrH.sub.2, the iron removal is more efficient and the settling of the insolubles is expedited. Also, the Fe and Si are more effectively and consistently precipitated.
REFERENCES:
patent: 3737305 (1973-06-01), Blayden et al.
patent: 3849119 (1974-11-01), Bruno et al.
patent: 3854934 (1974-12-01), Dore et al.
patent: 3869749 (1989-09-01), Fioravanti et al.
patent: 3870511 (1975-03-01), Szekely
patent: 4067731 (1977-01-01), Chia
patent: 4556419 (1985-12-01), Otsuka et al.
patent: 4670050 (1987-06-01), Ootsuka et al.
patent: 4714494 (1987-12-01), Eckert
patent: 4738717 (1988-04-01), Dokken
patent: 4772319 (1988-09-01), Otsuka et al.
patent: 4891065 (1990-01-01), Green et al.
patent: 4959101 (1990-09-01), MacNeal et al.
D. V. Neff, "Nonferrous Molten Metal Processes," Metals Handbook, 9th Edition, vol. 15/Casting, Editors: D. M. Stefauescu et al., ASM International, Metals Park, Ohio, 1988, pp. 456-465, 485, and 486.
E. F. Emley, Principles of Magnesium Technology, Pergamon Press, Inc, New York, N.Y., 1966, pp. 191-200 and 261-264.
R. J. Fruehan, "Gases in Metals," Metals Handbook, 9th Edition, vol. 15/Casting, Editors: D. M. Stefauescu et al., ASM International, Metal Parks, Ohio, 1988, pp. 82-87.
Hillis James E.
Mikucki Barry A.
Andrews Melvyn J.
The Dow Chemical Company
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