Morrison & Foerster LLP
Magnesium alloy cast material for plastic processing, magnesium alloy member using the same, and manufacturing method thereof
 This invention is to provide a magnesium alloy cast material capable of manufacturing a wheel, a large-sized forged piece such as wheel having properties equivalent to those of aluminum molten forged member, directly from the state of continuous cast material. The magnesium alloy cast material is a nearly intermediate alloy composition between conventional AZ61 alloy and AZ80 alloy, comprising Al: 6.2 to 7.6 wt. %, Mn: 0.15 to 0.4 wt. %, Zn: 0.4 to 0.8 wt. % and Mg: balance, and casting by defining the mean crystal grain size under 200 .mu.m. The forgeability is excellent, and when forged, a forged piece superior in mechanical properties and corrosion resistance to the aluminum molten forged member can be manufactured. 
Mazda Motor Corporation
B C C B B B B
B60B C22C C22F B60B B60B B60B B60B
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Yukio Nobuo Shoji Makoto
Yamamoto Sakate Hirabara Fujita