公开(公告)号：US20100059151A1

公开(公告)日：2010-03-11

申请号：US12312704

申请日：2007-12-12

申请人： Shingo Iwamura ,  Tadashi Minoda ,  Katsuya Kato

发明人： Shingo Iwamura ,  Tadashi Minoda ,  Katsuya Kato

IPC分类号： C22F1/04 ,  C22F1/057 ,  C22C21/16 ,  C22C21/18 ,  C22C21/14

CPC分类号： C22C21/12 ,  C22C21/14 ,  C22C21/16 ,  C22C21/18 ,  C22F1/00 ,  C22F1/047 ,  C22F1/057

摘要： A heat-treated high-strength Al—Cu—Mg—Si aluminum alloy product exhibits excellent extrudability and high strength. The high-strength Al—Cu—Mg—Si aluminum alloy product obtained by extrusion is characterized in that the microstructure of the entire surface of the cross section of the aluminum alloy product is formed of recrystallized grains, the grains have an average aspect ratio (L/t) of 5.0 or less (wherein L is the average size of the grains in the extrusion direction, and t is the average thickness of the grains), and the orientation density of the grains in the microstructure, for which the normal direction to the {001} plane is parallel to the extrusion direction in comparison with the grains orientated to random orientations, is 50 or less. The high-strength Al—Cu—Mg—Si aluminum alloy product obtained by extrusion and cold working is characterized in that rod-shaped precipitates are arranged in the grains of the matrix in the direction, the precipitates have an average length of 10 to 70 nm and a maximum length of 120 nm or less, and the number density of the precipitates in the [001] direction measured from the (001) plane is 500 or more per square micrometer.

摘要翻译： 经热处理的高强度Al-Cu-Mg-Si铝合金产品具有优异的挤出性和高强度。 通过挤出获得的高强度Al-Cu-Mg-Si铝合金产品的特征在于，铝合金产品的横截面的整个表面的微观结构由再结晶晶粒形成，颗粒具有平均纵横比（ L / t）为5.0以下（其中L是挤出方向上的晶粒的平均尺寸，t是晶粒的平均厚度），并且微观结构中的晶粒的取向密度为法线方向 与定向为随机取向的晶粒相比，{001}平面与挤出方向平行，为50以下。 通过挤出和冷加工获得的高强度Al-Cu-Mg-Si铝合金产品的特征在于，在<100>方向上在基体颗粒中排列棒状沉淀物，沉淀物的平均长度 10〜70nm，最大长度为120nm以下，从（001）面测定的[001]方向的析出物的数密度为每平方微米500以上。