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材料名称:6A02 旧称:LD2
标准:GB/T 3191-1998
主要特征及应用范围:
具有中等强度,退火和热态下有高的可塑性、淬火和自然时效后塑性尚可,且这种状态下抗蚀性可与5A02.3A21相比,人工时效状态合金具有晶间腐蚀倾向,可切削淬火后尚可,退火后不好,合金可点焊和氢原子焊,气焊。
化学成分:
硅Si:0.50-1.2
铁Fe: 0.50
铜Cu:0.20-0.6
锰Mn:0.15-0.35或铬Cr:0.15-0.35
镁Mg:0.45-0.9
锌Zn:0.20
钛Ti:0.15
铝Al:余量
其他:
单个:0.05 合计:0.10
力学性能:
抗拉强度 σb (MPa):≥295
伸长率 δ5 (%):≥12
注 :棒材室温纵向力学性能
试样尺寸:棒材直径(方棒、六角棒内切圆直径)≤150
热处理范围:
1) 均匀化退火:加热525~540℃;保温时间为12~14h;炉冷。2)快速退火:加热350~370℃;随材料有效厚度的不同,保温 30~120min;空冷。3)淬火和时效:淬火510~530℃,水冷;人工时效150~165℃,6~15h,空冷;自然时效室温96h。
状态:铝及铝合金挤压棒材(≤150mm,H112、F.T6态)
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