通过端淬试验和大尺寸锻件合金淬火试验研究了3种成分7085铝合金的淬透性.端淬试验表明:成分Al-7.0Zn-1.41Mg-1.50Cu-0.14Zr,Al-7.48Zn-1.51Mg-1.42Cu-0.15Zr及Al-7.95Zn-1.80Mg-1.59Cu-0.15Zr 3种合金的淬透深度均大于150mm,而7075合金(成分:Al-5.62 Zn-2.51 Mg-1.60 Cu)仅有38.5 mm,大尺寸合金淬火试验证明了7085合金高的淬透性.通过比较3种7085铝合金T76时效后的硬度和电导率,及与大、小淬火试样比较,淬火后,相对较大的试样比小试样硬度高、电导率低,主要是由于较大试样淬火应力高,导致晶格畸变大造成.研究结果证明,7085铝合金具有极佳的淬透性能,同时建议提高Zn/Mg不应低于4.4.
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