| 摘要 |
PROBLEM TO BE SOLVED: To provide a cast billet for extrusion molding suitable for obtaining an extruded shape material having excellent stress corrosion cracking resistance (SCC resistance), and a method for producing the same.SOLUTION: Provided is a method for producing a cast billet for extrusion molding of a 7000 series aluminum alloy, and is characterized in that homogenizing treatment is performed for two or more times after casting, and the homogenizing treatment conditions on and after the second time are weaker than the homogenizing treatment conditions in the first time. |
