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美国专利US7135077本发明的目的是轧制、锻造或挤压厚度超过12mm的铝合金产品,通过固溶化进行热处理、淬火和人工时效,其微观组织的特性如下:在最终变形产品的四分之一厚度到中间厚度之间测量再结晶晶粒的体积分数小于35%,在再结晶区域之间的截获距离大于250μm,大于300μm较好,大于350μm为最佳。
US Pat. No. 7,135,077 The object of the present invention is to roll, forge or extrude an aluminum alloy product having a thickness in excess of 12 mm, heat treated by solutionizing, quenching and artificial aging with the microstructure characteristics as follows: one quarter of the final deformation product The volume fraction of recrystallized grains measured from the thickness to the intermediate thickness is less than 35%, the intercepting distance between the recrystallized regions is more than 250 μm, more preferably 300 μm, and more preferably 350 μm.