| abstract |
An object of the present invention is to provide an Al-Zn-Mg-Cu-based 7000-based Al alloy having high strength and high strength. The Al-Zn-Mg-Cu-based 7000-series Al alloy molten metal is preferably formed by an inert gas, preferably spray-formed, and rapidly solidified by solidifying a preform body. When the amount of oxygen contained in the alloy is reduced to have a structure free from inclusions, the mechanical properties at room temperature have a tensile strength of 600 MPa or more, and the tensile strength is 600 MPa or more and less than 800 MPa. %, And when the tensile strength is 800 MPa or more, it has an elongation of 10% or more, and is an Al alloy excellent in cold workability such as rolling. [Selection figure] None |