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三、铝型材挤压大部分铝合金型材都是用热处理可强化的合金(6063、6061及 Al-Zn-Mg 合金)挤压的。这些合金除了有很好的挤压性能外,还有适当的机械性能与良好的表面装饰性能及抗蚀性,使得铝合金型材具有压倒其他挤压材料的优势,在国民经济各部门获得了广泛的应用。关于型材生产的难易程度,在德国把型材分为13类,A 类最易挤压,N 类最难(图26)。国际上通用型材外接圆直径描述其大小,外接
Third, aluminum extrusion Most aluminum profiles are made of heat treatment can be enhanced by the alloy (6063,6061 and Al-Zn-Mg alloy) extrusion. In addition to good extrusion properties, these alloys have appropriate mechanical properties and good surface finish and corrosion resistance, making the aluminum alloy profile an advantage over other extruded materials and gaining wide acceptance in various sectors of the national economy Applications. With regard to the ease of profile production, profiles are classified into 13 categories in Germany, with category A being the most easily squeezed and category N hardest (Figure 26). International general profile circumscribed circle diameter describes its size, external