Sumitomo Electric Industries, Limited

Toyo Aluminum K.k.

Kiyoaki Akechi

Nobuhito Kuroishi

Yusuke Odani

Yoshinobu Takeda

Toshihiko Kaji

Yoshiaki Itoh

Tetsuya Hayashi

Jun Kusui

Takashi Watsuji

Akiei Tanaka

Takamasa Yokote

Yuusuke Odani

Takao Tanji

Hyper-eutectic aluminum-silicon alloy powder and method of preparing the

Method of degassing and solidifying an aluminum alloy powder

The present invention relates to parts, such as a drive gear and driven gear, for use in a rotary gear pump exhibiting good sliding characteristics against a pump case made of light metals such as aluminum alloys. These parts are obtained by subjecting aluminum alloy powders, which have been solidified at a cooling rate of 100.degree. C./sec or more, or aluminum alloy powders having particle diameters of 350 .mu.m or less, to powder compacting and hot extrusion and optionally further to hot forging, or subjecting the aluminum alloy powders to powder forging.

Parts for use in rotary gear pump

A new material for use in the manufacture of semiconductor devices, a method of manufacturing the new material, and a heat radiator structure for a semiconductor device. The material is an aluminum alloy containing 30-60% by weight of Si and the remaining weight % is Al. The method of manufacture includes solidifying molten material into a powder and forming the powder by hot plastic working. The heat radiator structure includes a substrate of envelope material and an Al-Si alloy layer glued to the substrate through a function layer.

Aluminum-silicon alloy heatsink for semiconductor devices

Spiral parts, such as orbiting and fixed scroll plates having involute wraps, for use in scroll compressors, the parts having low coefficient of thermal expansion and high tensile strength and Young's modulus, are formed by combining a self-lubricating power into aluminum raw material powder prior to compression and forging. As an alternative to and in conjunction with the foregoing, temperatures during preform heating and in the die for forging are controlled to be in respective ranges of 300.degree. to 500.degree. C. and 150.degree. to 500.degree. C. Aluminum alloy fine powder preferably has a particle diameter no larger than 350 .mu.m. The self-lubricating powder preferably forms 1 to 25% of the mix by volume, and contains at least one member selected from the group consisting of graphite, BN, and MoS.sub.2. The aluminum raw material powder may contain at least one element selected from the group consisting of Cu, Mg, and Si, or a kind of compound particles from the group consisting of oxides, nitrides, borides, and carbides of Fe, Al, Mg, Ti, Zr, and Si.

Forged aluminum alloy spiral parts and method of fabrication thereof

Method for producing material for semiconductor device

Aluminum alloy comprises 10 to 36 wt % of Si, 2 to 10 wt % of at least one metal selected from the group consisting of Fe, Ni, Co, Cr and Mn, and remainder consisting essentially of aluminum. The aluminum alloy further includes 1.0 to 12 wt % of Cu and 0.1 to 3.0 wt % of Mg. In a method for producing the aluminum alloy the steps comprises preparing powder mixtures including Si, at least one of metal selected from the group consisting of Fe, Ni, Co, Cr and Mn, and remainder consisting essentially of Al, producing aluminum alloy powders, compacting the aluminum alloy powders into a shape and hot working the aluminum alloy powder compact.

Aluminum alloy and method for producing the same

A light weight and high strength aluminum alloy and a process for producing such an alloy, which alloy is suitable for forming automotive engine components, including pistons. In a preferred embodiment, 80 to 99.5% by volume of an aluminum alloy powder or a mixed powder composed of pure metal powders or master alloy powders is blended with 0.5 to 20% by volume of at least one of carbon or graphite powder, an oxide powder, a carbide powder and a nitride powder. The blend is then mechanically alloyed, following which the thereby-obtained powder is subjected to working such as by compaction and hot forging, hot pressing, cold isostatic pressing and hot forging, or cold isostatic pressing and hot extrusion. By the use of mechanical alloying, the advantages of a rapidly solidified powder having a supersaturated solid solution and uniform fine crystal grains are attained, and the effect of dispersion-strengthening is brought about by the addition of dispersion particles to the micro structure of the rapidly solidified powder.

Dispersion-strengthened heat- and wear-resistant aluminum alloy and

A process for producing an aluminum alloy comprises: producing an aluminum alloy powder, consisting of (A) 10 to 36 wt % of Si, 1 to 12 wt % of Fe, 2 to 10 wt % of at least one of metal selected from the group consisting of Ni, Co, Cr and Mn, reminder of the alloy powder consisting of aluminum, or consisting of (B) 10 to 36 wt % of Si, 2 to 10 wt % of Ni, 2 to 10 wt % of at least one of metal selected from the group consisting of Fe, Co, Cr, and Mn, and remainder of the alloy powder consisting of aluminum; compressing a mass of the powder by either compacting the power or accumulating the powder in a can where in case of compacting the powders are so as to have its actual density ratio of 65% to 90%, and in case of the accumulation the powders are compressed so as to have its actual density ratio of not more than 90%; heating the thus compressed mass of powder in convection type heating furnace at a temperature of 250.degree. C. to 550.degree. C. for 5 to 20 hours; and hot extrusion-working the mass of powders at extrusion ratio not less than 4:1, without cooling said heated compressed mass of powders.

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Hyogo, Japan

Kiyoaki Akechi