Honda Motor Co., Ltd.

Honda Giken Kogyo Kabushiki Kaisha

Nissin Kogyo Co., Ltd.

Takahiro Mizukami

Katsuhiro Shibata

Yusuke Toyoda

Hiroto Shoji

Takaharu Echigo

Satoshi Matsuura

Masashi Hara

Hiroki Takano

Tsunehisa Hata

Fumiaki Fukuchi

Naoaki Yamamoto

Hirohide Shibata

Tsuyoshi Haruhara

A thin and large high toughness die-cast product is provided that is formed from an Al&#x2014;Mg casting alloy having the composition 3.5 wt %&#x2266;Mg&#x2266;4.5 wt %, 0.8 wt %&#x2266;Mn&#x2266;1.5 wt %, Si&#x3c;0.5 wt %, Fe&#x3c;0.5 wt %, a sum (Ti+Zr) of amounts of Ti and Zr added of equal to or greater than 0.3 wt %, and a ratio (Ti/Zr) of the amounts of Ti and Zr added of at least 0.3 but not more than 2, with the balance being Al.

Die casting having high toughness

A forming method wherein a billet (B,C) comprising a metal-based composite material () prepared by mixing an aluminum alloy () and a ceramic () is subjected to pressure forming to manufacture a formed article, which comprises carrying out the pressure forming by the use of different compression ratios for different portions of the formed article, wherein a compression ratio means the ratio of the height of a billet before the pressure forming to height of the billet after the pressure forming. The above forming method allows the manufacture of a formed article having different volume contents 8Vf) of the ceramic for different portions thereof.

Method of forming a product of metal-based composite material

A brake drum has its strength elevated in its disk portion. The brake drum is formed from a composition having ceramics dispersed in a matrix. The disk portion has a high ceramic content and thereby a high strength. The brake drum has a disk portion and a cylindrical portion. The disk portion has a first ceramic content by volume and the cylindrical portion has a second ceramic content by volume that is less than the first ceramic content by volume as a result of the application of a higher compression ratio to the disk portion.

Brake drum and process for manufacturing the same

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Wako, Japan

Takahiro Mizukami