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    • 4. 发明专利
    • Porthole extruded material for hot bulge forming and method for manufacturing the same
    • 用于热膨胀成形的多孔挤压材料及其制造方法
    • JP2012020326A
    • 2012-02-02
    • JP2010161482
    • 2010-07-16
    • Furukawa-Sky Aluminum CorpNippon Steel Corp古河スカイ株式会社新日本製鐵株式会社
    • ATSUTA KENWAKAKURI SATOSHIICHITANI KOJIHIBINO AKIRASAGA MAKOTOTAKADA TAKESHI
    • B21C23/00B21C25/02B21D26/053
    • PROBLEM TO BE SOLVED: To provide a hollow extruded material of an Al-Mg-Si-based aluminum alloy capable of increasing strength in the vicinity of a welded part and increasing an expansion rate, and capable of achieving a workpiece with an even plate thickness distribution by preventing a constriction when the hollow extruded material of the Al-Mg-Si-based aluminum alloy is subjected to hot bulging.SOLUTION: When a square area with a side length of 500 μm including 40 or more crystal grains is selected from an area demarcated by a range of 2 mm on both sides with a welding line as its middle in a direction vertical to the welding line on a surface vertical to a direction of extruding the porthole hollow extruded material of Al-Mg-Si-based aluminum alloy, and t/10 to 9t/10 of plate thickness t of the hollow extruded material from a surface of the hollow extruded material in a direction parallel to the welding line, the minimum value of an area ratio of the crystal grains in a Cube orientation is set to be 10-50%, and the difference of the maximum value and the minimum value of the area ratio of the crystal grains in the Cube orientation is set to be 60% or less.
    • 要解决的问题:为了提供能够提高焊接部附近的强度并提高膨胀率的Al-Mg-Si系铝合金的中空挤压材料,并且能够实现具有 当Al-Mg-Si系铝合金的中空挤出材料受到热膨胀时,通过防止收缩而使板厚分布均匀。 解决方案:当从两侧的2mm范围内选择边长为500μm的包括40个或更多个晶粒的正方形区域时,以垂直于 在垂直于挤出Al-Mg-Si系铝合金的孔眼中空挤出材料的方向的表面上的中空挤出材料的t / 10〜9t / 10的中空挤出材料的板厚t的t / 10〜9t / 10 挤压材料在平行于焊接线的方向上,将立方体取向上的晶粒的面积比的最小值设定为10〜50%,将面积比的最大值与最小值的差 的立方体取向的晶粒设定为60%以下。 版权所有(C)2012,JPO&INPIT