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Tokyo, Japan

Sumitomo Corporation is one of the largest worldwide Sogo shosha general trading companies, and is a diversified corporation. The company was incorporated in 1919, it is a member company of the Sumitomo Group.It is listed on four Japanese stock exchanges and is a constituent of the TOPIX and Nikkei 225 stock indices. Today, the company is one of the top three Sogo shosha companies in the world. Wikipedia.


Patent
Sumitomo Electric Industries and Sumitomo Corporation | Date: 2014-09-02

An object of the present invention is to improve machining speed by realizing both conductive properties and discharge performance with regard to an electrode wire for wire electric discharge machining, the electrode wire being obtained by plating a steel wire with a copper-zinc alloy. Another object is to suppress the occurrence of separation, cracking, and the like of plating in a wire-drawing step of an electrode wire. An electrode wire for wire electric discharge machining of the present invention includes a steel wire (


A hot stamped high strength part in which the propagation of cracks which form at the plating layer at the time of hot stamping when hot stamping aluminum plated steel sheet is suppressed and the post painting anticorrosion property is excellent even without adding special ingredient elements which suppress formation of cracks in an aluminum plating layer is provided. A hot stamped high strength part which is excellent in post painting anticorrosion property, which hot stamped high strength part has an alloy plating layer which includes an AlFe intermetallic compound phase on the surface of the steel sheet, wherein the alloy plating layer is comprised from phases of a plurality of intermetallic compounds, a mean linear intercept length of crystal grains of a phase containing Al: 40 to 65 mass % among the phases of the plurality of intermetallic compounds is 3 to 20 m, an average value of thickness of the AlFe alloy plating layer is 10 to 50 m, and a ratio of the average value of thickness to the standard deviation of thickness of the AlFe alloy plating layer satisfies the following relationship:


Patent
Sumitomo Corporation and Nittetsu Mining Co. | Date: 2012-05-29

The present invention relates to a method for producing lithium carbonate, the method including: mixing ammonia and carbon dioxide gas (carbonate gas) with an aqueous solution containing lithium chloride to conduct a carbonation reaction; and thereafter, recovering a produced solid by solid-liquid separation, and also relates to a method for producing high purity lithium carbonate.


Patent
Sumitomo Electric Industries and Sumitomo Corporation | Date: 2012-12-28

A copper alloy having high strength and a high electrical conductivity in combination and a copper alloy wire are provided. A copper alloy contains 50 percent by mass or more and 95 percent by mass or less of Cu, 5 percent by mass or more and 50 percent by mass or less of Fe, and the remainder composed of deoxidizer elements and incidental impurities and has a texture exhibiting large diffraction peaks in the <111> orientation of Cu and in the <110> orientation of Fe when a cross-section is subjected to X-ray diffraction. The intensity ratio I


Patent
Sumitomo Corporation and Sumitomo Electric Industries | Date: 2012-10-02

Magnesium-based alloy wire excelling in strength and toughness, its method of manufacture, and springs in which the magnesium-based alloy wire is utilized are made available. The magnesium-based alloy wire contains, in mass %, 0.1 to 12.0% Al, and 0.1 to 1.0% Mn, and is provided with the following constitution. Diameter d that is 0.1 mm or more and 10.0 mm or less; length L that is 1000d or more; tensile strength that is 250 MPa or more; necking-down rate that is 15% or more; and elongation that is 6% or more. Such wire is produced by draw-forming it at a working temperature of 50 C. or more, and by heating it to a temperature of 100 C. or more and 300 C. or less after the drawing process has been performed.

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