Grain refining metals

Details Grain refining metals Grain refining metals

C - Chemistry, Metallurgy

22

C

53/282, 75/7

C22C 9/00 (2006.01) C22C 1/06 (2006.01)

Patent

CA 1289780

ABSTRACT OF THE INVENTION Grain Refining Metals The invention provides a grain refinement method for copper-based metals, which method can be applied to a range of different types of such metals. In accordance with the method, one prepares a melt of the copper-based metal to be grain refined which is deficient in at least one of the following components: (a) zirconium; (b) at least one of: lithium, sodium, potassium beryllium, magnesium, calcium, strontium and barium; (c) at least one of: scandium, yttrium, titanium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum, tungsten, manganese, technetium, rhenium, iron, ruthenium, osmium, cobalt, rhodium, iridium, nickel, palladium, platinum, silver, gold, zinc, cadmium, mercury and the rare earth elements; and (d) at least one of: aluminium, gallium, indium, silicon germanium, tin, lead, phosphorus, arsenic, antimony, bismuth, sulphur, selenium and tellurium; introducing said deficient component (a) to (d) into said melt of copper-based metal; and thereafter solidifying said melt of copper-based metal which now contains each of said components (a) to (d) to produce grain-refined copper-based metal. The invention also provides grain refiners for practising the method.

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