LT66是含镁量为1.5～2.0％的铝合金,其薄板主要用于冲制钢笔外套等制品。要求它必须具有适当强度和良好的深冲性能,经过冲制成型后应有良好的表面光洁度。从生产实践得知,材料的深冲性能和制品的表面光洁度都与其再结晶组织有关。凡是具有粗晶组织的铝板、深冲度小,制品表面粗糙;具有细晶组织的铝板,深冲度一般都较大,制品表面的光洁度良好。为了进一步弄清它们的关系,我们做 LT66 is a magnesium content of 1.5 to 2.0% of the aluminum alloy, the sheet is mainly used for stamping pens and other products. Requires it must have the appropriate strength and good deep-drawing properties, after forming should have a good surface finish. From the production practice that the deep drawing properties of materials and products of surface finish with its recrystallization organizations. All have a coarse grain of aluminum, deep drawing small, rough surface products; with fine grain structure of aluminum, deep drawing are generally larger, good surface finish. In order to further clarify their relationship, we do