公开(公告)号：US4790884A

公开(公告)日：1988-12-13

申请号：US20600

申请日：1987-03-02

申请人： Kenton P. Young ,  Edward L. Colvin ,  Joel A. Bowers ,  Robert W. Westerlund

发明人： Kenton P. Young ,  Edward L. Colvin ,  Joel A. Bowers ,  Robert W. Westerlund

IPC分类号： C22F1/00 ,  C22F1/04 ,  C22F1/047 ,  C22F1/053 ,  C22F1/057

CPC分类号： C22F1/047 ,  C22F1/04 ,  C22F1/053 ,  C22F1/057

摘要： Disclosed is a method of making aluminum base alloy flat rolled product substantially free of Luder's lines after stretching, the method comprising the steps of providing a body of a lithium-containing aluminum base alloy and working the body to produce a flat rolled product prior to solution heat treating and quenching. The flat rolled product is preaged for a time and temperature which does not substantially affect mechanical properties but which permits stretching the flat rolled product without formation of Luder's lines. Thereafter, the preage flat rolled product is stretched and aged to a condition having a substantially stable level of mechanical properties.

公开(公告)号：US5213639A

公开(公告)日：1993-05-25

申请号：US847352

申请日：1992-03-06

申请人： Edward L. Colvin ,  Jocelyn I. Petit ,  Robert W. Westerlund ,  Paul E. Magnusen

发明人： Edward L. Colvin ,  Jocelyn I. Petit ,  Robert W. Westerlund ,  Paul E. Magnusen

IPC分类号： B32B15/01 ,  C22C21/16 ,  C22F1/057

CPC分类号： C22C21/16 ,  B32B15/016 ,  C22F1/057 ,  Y10T428/12764

摘要： A method of producing a sheet product and improved products having improved levels of toughness and fatigue crack growth resistance at good strength levels. The method comprises providing an aluminum base alloy containing 4 to 4.5% Cu, 1.2 to 1.5% Mg, 0.4 to 0.6% Mn, 0.12% max. Fe, 0.1% max. Si, the remainder aluminum, incidental elements and impurities and hot rolling the alloy, heating the alloy to above 910.degree. F. and additionally hot rolling it in a range of about 600.degree. to 900.degree. F., solution heat treating, preferably for a time of less than about 15 minutes at a solution heat treating temperature, and rapidly cooling and naturally aging. The invention products have very good combinations of strength together with high fracture toughness or low fatigue crack growth rate, or both, making them well suited for aerospace applications such as fuselage skin. The products preferably include a corrosion protecting cladding of aluminum or aluminum alloy.

摘要翻译： 一种生产片材产品的方法和具有改进的韧性水平和耐疲劳裂纹扩展性的改良产品，具有良好的强度水平。 该方法包括提供含有4至4.5％的Cu，1.2至1.5％的Mg，0.4至0.6％的Mn，最大0.12％的铝基合金。 Fe，最大0.1％ Si，剩余的铝，附带元素和杂质，热轧合金，将合金加热至910°F以上，另外在约600°至900°F的范围内进行热轧，进行固溶热处理，优选为 时间在固溶热处理温度下小于约15分钟，并快速冷却和自然老化。 本发明产品具有非常好的强度组合以及高断裂韧性或低疲劳裂纹扩展速率，或两者兼有，使得它们非常适合航空航天应用如机身皮肤。 产品优选包括铝或铝合金的腐蚀保护包层。