Die casting having high toughness
AssigneeHonda Giken Kogyo Kabushiki Kaisha
InventorsYusuke Toyoda, Takahiro Mizukami, Fumiaki Fukuchi, Tsunehisa Hata, Katsuhiro Shibata
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Abstract
A thin and large high toughness die-cast product is provided that is formed from an Al—Mg casting alloy having the composition 3.5 wt %≦Mg≦4.5 wt %, 0.8 wt %≦Mn≦1.5 wt %, Si≦0.5 wt %, Fe≦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.
Claims4
A high toughness die-cast product comprising an Al—Mg casting alloy having 3.5 wt %≦Mg≦4.5 wt %, 0.8 wt %≦Mn≦1.5 wt %, Si<0.5 wt %, Fe<0.5 wt %, a sum (Ti+Zr) of the 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.
A high toughness die-cast product in thin sheet form with a minimum thickness t1 of 1.2 mm≦t1 ≦3 mm, the high toughness die-cast product being cast using an Al—Mg alloy by a die-casting method, having chill layers (2) on opposite faces thereof, and having a proportion P of the sum of thicknesses t3 and t4 of the two chill layers (2) relative to the minimum thickness t1 set at 18% or greater, and the Al—Mg alloy having 3.5 wt %≦Mg≦4.5 wt %, 0.8 wt %≦Mn≦1.5 wt %, Si<0.5 wt %, Fe<0.5 wt %, and 0.1 wt %≦at least one of Ti and Zr≦0.3 wt %, with the balance being Al.
Dependencies are inferred from the claim text.