Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Patent
1985-09-23
1987-04-21
Brody, Christopher W.
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
420409, 420590, C22B 900
Patent
active
046593772
ABSTRACT:
A method for producing a magnesium alloy melt is disclosed. The method comprises the steps of (a) melting a magnesium alloy consisting essentially of up to 12 percent of aluminum, up to 30 percent of zinc, up to 1.5 percent of silicon, from 0.04 percent to 0.15 percent of manganese, and a given amount of dissolved beryllium, the given amount constituting from 0.0025 percent to 0.0125 percent of the alloy, balance essentially magnesium, and (b) protecting the magnesium alloy melt against oxidation by blanketing it with an atmosphere containing at least 80 percent by volume of nitrogen. A magnesium alloy melt produced in accordance with the method of the instant invention will undergo reduced oxidation by comparison with magnesium alloy melts produced in accordance with prior art methods. A method for producing a die-casting from a magnesium alloy melt produced according to the method of the instant invention is also disclosed.
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patent: 2844463 (1976-03-01), Lucien
patent: 3947268 (1976-03-01), Tikhonova et al.
Burns, J. R., "Beryllium in Magnesium Casting Alloys", Trans. ASM, vol. 40, 1948, pp. 1-19 (Preprint), 143-162.
Burkett, F. L., "Beryllium in Magnesium Die Casting Alloys", AFS Trans., vol. 62, 1954, pp. 2-4.
Foerster, Paper No. G-T75-112, 8th SDCE International Die Casting Exposition & Congress, Detroit, Mich. 1975 (pp. 1-6).
Brody Christopher W.
NL Industries Inc.
Purdue John C.
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