Showa Denko K.k.

Koji Hisayuki

Kazuhiko Minami

Shigeru Aoya

Daisuke Hashimoto

Yoshikazu Kato

Ryouta Kimura

Yoshimasa Ohashi

Kazunori Sakayori

Masaaki Oide

Kazuhiro Kobori

An aluminum alloy has a composition consisting of Si: 0.03 to 0.6 mass %, Fe: 0.1 to 0.7 mass %, Cu: 0.05 to 0.20 mass %, Mn: 1.0 to 1.5 mass %, Mg: 0.01 to 0.1 mass %, Zn: 0 to 0.1 mass %, Ti: 0 to 0.1 mass %, and the balance being Al and inevitable impurities.

Aluminum alloy and process for producing aluminum alloy extrusions

A devicefor drawing a tubular workpiece is provided with a drawing dieand a drawing plug. The drawing dieincludes a first curved surface sectionC from which the workpieceis detached while being reduced in diameter, a die bearing sectionB arranged radially inward of and downstream of a workpiece separation point K of the first curved surface sectionC, and a guide sectionD having a second curved surface sectionC which smoothly continues to an upstream end of the die bearing sectionB and configured to again come into contact with the workpiecedetached from the first curved bearing sectionC to guide the workpiece to the die bearing sectionB while reducing a diameter of the workpiece. The drawing plughas a plug bearing sectionB shorter than a length Lof the die bearing sectionB. The plug bearing sectionB is arranged at a position corresponding to the die bearing sectionB.

Device for drawing tubular workpiece

The present invention provides an anode material for a lithium secondary battery, which material realizes prolongation of the cycle life of a lithium secondary battery. The present invention relates to an anode active material for a lithium secondary battery, the active material containing a powder produced by a step of forming an etched foil through etching of both surfaces of a foil of Al having a purity of 90 mass % or higher, and a step of shredding the etched foil, the steps being carried out in this order.

Negative electrode active substance for lithium secondary battery and method for producing same

Growing community of inventors

Oyama, Japan

Koji Hisayuki