Specialized metallurgical processes – compositions for use therei – Processes – Free metal or alloy reductant contains magnesium
Patent
1981-02-18
1983-05-17
McCarthy, Helen M.
Specialized metallurgical processes, compositions for use therei
Processes
Free metal or alloy reductant contains magnesium
75 05C, 75123H, 75126G, 102448, 448501, C22C 104, C22C 3300, C22C 4300, F42B 1114
Patent
active
043838537
ABSTRACT:
High density, generally microscopically homogeneous corrosion-resistant chromium-uranium metal alloys for ammunition use (particularly for spherical pellets or shot) can be made from U.sup.238 or an isotopic mixture high in U.sup.238 (such as "depleted uranium") and at least about 10 atomic % chromium. The alloys can also contain one or more metals of Group VIII, first triad, of the Periodic Table, and a variety of other elements used, for example, in making ferrous metals. Major factors to be considered in formulating the alloy are density, melting point or melting range, passivity or chemical or biological inertness, resistance to segregation in the molten phase and upon rapid cooling (chromium-poor phases or regions being particularly undesirable), and compensation for any loss of free chromium due to formation of intermetallic or other forms of combined chromium. The uranium content in the alloy is preferably less than 70 atomic %. Rapid cooling of the chromium-uranium or chromium-uranium-Group VIII metal melt, e.g. by the shot tower technique, avoids undesirable segregation effects which can detract from corrosion resistance. The shot tower may optionally contain a non-oxidizing atmosphere.
REFERENCES:
patent: 3203788 (1965-08-01), Contractor et al.
patent: 3302570 (1967-02-01), Marquardt et al.
patent: 3370535 (1968-02-01), Permutter
patent: 3420660 (1969-01-01), Kawahata et al.
patent: 3981722 (1976-09-01), Ray et al.
patent: 4221587 (1980-09-01), Ray
Giessen, B. C. et al., International Conference on Rapidly Quenched Metals, 3rd, Univ. of Sussex, England, 1978, Properties of Metallic Glasses Containing Actinide Metals: I. Thermal Properties of U-M Glasses (M=V, Cr, Mn, Fe, Co, and Ni), pp. 406.varies.411.
Ray, Rantan, Metal Progress, Jun. 1982, pp. 29-31, (American Society for Metals), "Bulk Microcrystalline Alloys from Metallic Glasses".
Loewenstein, Paul, Metals Handbook, vol. 3, 9th Edition, 1980, pp. 773-780 (American Society for Metals), "Industrial Uses of Depleted Uranium".
Beahm, E. C. et al., "Laves Phases of Uranium and 3d Transition Metals", Journal of the Less Common Metals, 50:57-71 (1976).
Grogan, J. D., "The Uranium-Iron System", Journ. of the Institute of Metals (London) 77:571-580 (1950).
Olofson et al., "Final Report on Processing and Applications of Depleted Uranium Alloy Products", to M.C.I.C., Aug. 6, 1976.
McCarthy Helen M.
McCollough William J.
Zapffe Carl
LandOfFree
Corrosion-resistant Fe-Cr-uranium.sup.238 pellet and method for does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Corrosion-resistant Fe-Cr-uranium.sup.238 pellet and method for , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Corrosion-resistant Fe-Cr-uranium.sup.238 pellet and method for will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1565733