Hitachi Metals, Ltd.

Kenichiro Shimizu

Shigeyuki Hamayoshi

Masahiko Ohshima

Norio Kumagai

Satoshi Fukui

Hidefumi Hisanabe

A method for repairing a die-casting sleeve comprising a ceramic-made inner cylinder shrink-fit in a metal-made outer cylinder, comprising the steps of detaching the used inner cylinder from the outer cylinder by heating; forming a diameter-increasing layer on a peripheral surface of the outer cylinder before or after shrink-fitting a new inner cylinder in the outer cylinder; assembling a new inner cylinder in the outer cylinder; and then machining the diameter-increasing layer to a cylindrical shape.

Method for repairing die-casting sleeve and repaired die-casting sleeve

There is disclosed a method of producing an aluminum composite material in which the content of silicon carbide can be made higher as compared with conventional methods, and the production cost is low, and the method can be carried out easily. An aluminum composite material of low-thermal expansion and high-thermal conductivity is produced by this method. A mixture of powder of aluminum metal or an alloy thereof and silicon carbide powder is pressurized and compacted to form a green compact. Subsequently, this green compact is charged into a mold, and is heated and compacted into a predetermined shape at a temperature not less than a melting point of the aluminum metal or the alloy thereof.

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Kitakyushu, Japan

Kenichiro Shimizu