Toyota Jidosha Kabushiki Kaisha

Kabushiki Kaisha Kobe Seiko Sho

Souichi Hayashi

Hiroshi Sato

Toshiki Ueda

Hideo Fujimoto

Jun Hisamoto

Akihiro Tsuruno

Kenji Shimoda

Mototsugu Koyama

Masao Takemoto

Kouki Ikeda

Zenichiro Kato

Kikuo Toyose

Nagisa Takee

Asao Mochizuki

Hitoshi Ishii

Masamichi Aono

Kanji Sakaguchi

Takashi Tomoda

Toshihiro Chikada

Johji Miyake

Takesi Nakakobara

Shigeki Shiraya

Syuichi Ezaki

Surface-treated Al or Al alloy materials which excel in adhesive property, formability, weldability, phosphatability, paint adhesion, and post-painting corrosion resistance are provided by forming a coated layer containing Zn and Fe or one or more of Si oxides, Al oxides and Al hydroxides together therewith, on the surface of Al or Al alloy base. The surface-treated Al or Al alloy materials are useful as metallic material to be painted and used after press forming and other processing, spot or laser welding and phosphating, including panel materials for automobiles and other various vehicles, shells for housefold electrical apparatus, and building materials.

Surface treated aluminum or aluminum alloy material

An aluminum alloy valve lifter comprises a valve lifter body made of Al-Si (5-20%) type alloy, having silicon average grain diameter of 2 to 40 micrometers, and consisting of a cylindrical portion and a disc portion; an Fe-C type sprayed coating formed on the peripheral surface of the cylindrical portion, containing 0.1% or more of carbon and having a hardness of 300 Hv or more; a wear-resistant chip fixed on the underside of the disc portion; and an adjusting shim set on the upper side of the disc portion.

Aluminum alloy valve lifter with sprayed coating and method of producing

A method for making a cylinder head cast from an aluminum alloy intended for use in internal combustion engines, and more particularly, a method for improving a portion of the cylinder head by a local heat treatment, comprises casting a cylinder head body from an aluminum alloy, directing a high density energy, such as TIG arc, laser, plasma arc or electron beam, to the surface of at least one region of the cylinder head body where a high strength is required, thereby rapidly remelting a surface layer in that region, and subsequently removing the irradiating energy and allowing the molten aluminum alloy of the surface layer to be rapidly cooled and solidified through heat transfer therefrom to the underlying matrix thereby forming a remelted, solidified layer.

Method for manufacturing a cylinder head of cast aluminum alloy for

Growing community of inventors

Nagoya, Japan

Souichi Hayashi