Class / Patent application number | Description | Number of patent applications / Date published |
420476000 | Zinc containing | 7 |
20100086435 | Cu-Ni-Si SYSTEM ALLOY FOR ELECTRONIC MATERIALS - An object of the present invention is to provide a Corson alloy having significantly improved characteristics, i.e. high strength and high electrical conductivity, by enhancing the effect of addition of Cr to a Cu—Ni—Si system alloy. There is provided a copper alloy for electronic materials comprising 1.0-4.5% by mass Ni, 0.50-1.2% by mass Si, 0.003-0.3% by mass Cr wherein the weight ratio of Ni to Si satisfies the expression: 3≦Ni/Si≦5.5, and the balance being Cu and incidental impurities, wherein particles of Cr—Si compounds having a size of 0.1 μm to 5 μm are dispersed in the alloy and the dispersed particles having an atomic concentration ratio of Cr to Si of 1 to 5 and a dispersion density of no more than 1×10 | 04-08-2010 |
20100209287 | TARNISH RESISTANT LOW GOLD AND LOW PALLADIUM YELLOW JEWELRY ALLOYS WITH ENHANCED CASTABILITY - A boron-free, low-gold, and low-palladium metal alloy composition formulated to provide an alloy with an attractive yellow color, improved tarnish resistance, and enhanced castability. In certain implementations, the alloy contains gold, silver, copper, palladium and indium. The alloy preferably contains less than 25% by weight gold and the weight percent ratio of silver to copper is between 0.65 and 2.65 and the weight percent ratio of palladium to indium is between 1 and 5. | 08-19-2010 |
20120321506 | METHOD FOR PRODUCING LEAD-FREE COPPER-BISMUTH ALLOYS AND INGOTS USEFUL FOR SAME - An ingot includes at least two metals selected from copper, tin, zinc and bismuth, wherein: (a) the ingot is a mechanical ingot, the at least two metals are 40-95 wt. % copper, 3-80 wt. % tin, 1-40 wt. % bismuth and/or 1-80 wt. % zinc, and other metals are present in a collective amount of 0-2 wt. %; or (b) the ingot is a cast ingot, the at least two metals are 40-80 wt. % copper, 3-80 wt. % tin, 1-40 wt. % bismuth and/or 1-80 wt. % zinc, and other metals are present in a collective amount of 0-2 wt. %, provided that when copper is present in the cast ingot in an amount greater than 69 wt. %, zinc is present in an amount less than 30 wt. %. Methods for preparing and casting the ingot are also disclosed, as is a system for casting a copper-bismuth alloy. | 12-20-2012 |
20130115128 | SULFUR-RICH CORROSION-RESISTANT COPPER-ZINC ALLOY - Copper-zinc alloys exhibiting enhanced oxidation resistance are provided by adding an amount of sulfur that is effective to enhance oxidative resistance. Such sulfur addition can be achieved by forming a sulfur-rich pre-mix that is added to a base alloy composition. This technique provides improved homogeneity and distribution of the sulfur predominantly in the form of a metal sulfide. | 05-09-2013 |
20140248175 | LEADLESS FREE-CUTTING COPPER ALLOY AND METHOD FOR PRODUCING THE SAME - Disclosed is a leadless free-cutting copper alloy that exhibits superior machinability, cold workability and dezincification resistance and a method for producing the same. The leadless free-cutting copper alloy comprises 56 to 77% by weight of copper (Cu), 0.1 to 3.0% by weight of manganese (Mn), 1.5 to 3.5% by weight of silicon (Si), and the balance of zinc (Zn) and other inevitable impurities, thus exhibiting superior eco-friendliness, machinability, cold workability and dezincification resistance. | 09-04-2014 |
20140369883 | COPPER ALLOY AND METHOD OF PRODUCING SAME - To obtain a copper alloy having a tensile strength of 700 N/mm | 12-18-2014 |
20150132179 | MASTER ALLOY FOR CASTING A MODIFIED COPPER ALLOY AND CASTING METHOD USING THE SAME - An advantage of the invention is to provide a master alloy used in a casting of a modified copper alloy, grains of which can be refined during a melt-solidification, and also a method of casting a modified copper alloy using the same. | 05-14-2015 |