Loading patent…
AssigneeFurukawa Electric Co., Ltd.
InventorsShoichi Sakoda, Akira Hideno, Nobuaki Ohara
Estimating the term…
An aluminum alloy cast molding produced by a high-pressure casting method, and having a composition containing Si in an amount of 0.6 to 1.0% by weight (which will be hereinafter simply referred to as %), Cu in an amount of 0.6 to 1.2%, Mg in an amount of 0.8 to 1.2%, Zn in an amount of 0.4 to 1.2%, Ti in an amount of 0.01 to 0.20%, and B in an amount of 0.002 to 0.015%, with the remainder being aluminum and inevitable impurities. The maximum dendrite cell size of the metal structure of the aluminum alloy casting is limited to 60 .mu.m or less. The present invention also provides a method of manufacturing an aluminum alloy casting by high-pressure casting, which manufacturing method includes the steps of charging a mold with a molten aluminum alloy having the above alloy composition, and subsequently solidifying the charged molten metal under pressures as high as 500 Kgf/cm.sup.2 or above so that the maximum dendrite cell size of the metal structure of the aluminum alloy casting is limited to 60 .mu.m or less.
A high strength and toughness aluminum alloy casting, produced by introducing the aluminum alloy in a molten state into one end of a three-dimensional mold in a high-pressure casting method, said cast molding having portions of significantly different thicknesses, said portions being homogeneous in tensile strength and elongation, said aluminum alloy having a composition containing Si in an amount of 0.6 to 1.0% by weight, Cu in an amount of 0.6 to 1.2% by weight, Mg in an amount of 0.8 to 1.2% by weight, Zn in an amount of 0.4 to 1.2% by weight, Ti in an amount of 0.01 to 0.20% and B in an amount of 0.002 to 0.015%, with the remainder being aluminum and inevitable impurities;
A method of manufacturing a high strength and toughness aluminum alloy by a high-pressure casting method, comprising the steps of:
Dependencies are inferred from the claim text.