ULTRA HIGH STRENGTH ALUMINUM-BASE ALLOYS

• Main Authors: KRAMER, LAWRENCE STEVENSON, PICKENS, JOSEPH ROBERT, CHO, ALEX, LANGAN, TIMOTHY JAMES, HEUBAUM, FRANK HERBERT
• Format: Patent
• Language: English; Korean
• Published: 15.06.1999
• Edition: 6
• Subjects: ALLOYS; CHEMISTRY; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; FERROUS OR NON-FERROUS ALLOYS; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; METALLURGY; PERFORMING OPERATIONS; SOLDERING OR UNSOLDERING; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS; WELDING; WORKING BY LASER BEAM

Cu, Li, Zn, Mg 및 Ag를 함유하는 Al 기저합금은 상대적으로 낮은 밀도, 고모듈러스, 높은 강도/연성 합성, 선행 냉간가공에 관계없는 강한 자연시효반응 및 선행냉간가공에 관계없는 강한 인공시효반응과 같은 상당히 바람직한 성질을 보유한다. 게다가, 합금은 좋은 용접성, 내식성, 저온특성 및 고온특성을 구비한다. 합금은 약 1 내지 7중량%의 Cu와, 약 0.1 내지 4중량%의 Li와, 약 0.01 내지 4중량%의 Zn과, 약 0.05 내지 3중량%의 Mg와 약 0.01 내지 2중량%의 Ag와, Zr, Cr, Mn, Ti, Hf, V, Nb, B 및 TiB에서 선택된 약 0.01 내지 2중량%의 결정미립체를 함유하고 나머지는 Al과 불가피한 불순물이다. 바람직한 합금은 약 3.0 내지 6.5중량%의 Cu와, 약 0.5 내지 2.6중량%의 Li와, 약 0.05 내지 2중량%의 Zn과, 약 0.1 내지 1.5중량%의 Mg와, 약 0.05 내지 1중량%의 Ag와 약 0.05 내지 0.5중량%의 결정미립체를 함유하고 나머지는 Al과 불가피한 불순물을 함유한다. Ge, Sn, Cd, In, Be, Sr, Sc, Y 및 Ca에서 선택된 부가된 원소는 본 합금에 Zn에 부가하여 혹은 대체되어서 사용될 수 있다. Aluminum-base alloys containing Cu, Li, Zn, Mg and Ag are disclosed which possess highly desirable properties, such as relatively low density, high modulus, high strength/ductility combinations, strong natural aging response with and without prior cold work, and high artificially aged strength with and without prior cold work. In addition, the alloys possess good weldability, corrosion resistance, cryogenic properties, and elevated temperature properties. The alloys may comprise from about 1 to about 7 weight percent Cu, from about 0.1 to about 4 weight percent Li, from about 0.01 to about 4 weight percent Zn, from about 0.05 to about 3 weight percent Mg, from about 0.01 to about 2 weight percent Ag, from about 0.01 to about 2 weight percent grain refiner selected from Zr, Cr, Mn, Ti, Hf, V, Nb, B and TiB2, and the balance Al along with incidental impurities. Preferred alloys comprise from about 3.0-6.5 weight percent Cu, from about 0.5-2.6 weight percent Li, from about 0.05-2 weight percent Zn, from about 0.1-1.5 weight percent Mg, from about 0.05-1 weight percent Ag, from about 0.05-0.5 weight percent grain refiner, and the balance Al and incidental impurities. Additional elements selected from Ge, Sn, Cd, In, Be, Sr, Sc, Y, and Ca may be used in addition to, or in place of, Zn in the present alloys.