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一、前言变形铝合金凡乎都具有共晶转变的多元合金。由于各种合金的化学成份及成份含量不同;同一合金其共品转变点数目、共晶温度也不同。对热处理强化变形铝合金而言,其淬火温度愈接近最低共晶点,超温或局部超温而引起组织过烧的危险性亦愈大。LY_(12)属Al—Cu—Mg系合金,三元共晶(Al+CuAl_2+Al_2CuMg)与淬火温度上限很接近,因此,对过烧很敏感。有关单位对LY_(12)过烧的组织特征及过烧对静拉伸的影响进行了不少工作,本试验着重于过烧温度淬火对抗蚀性、工艺性、物理性能的影响进行探索并在此基础上确是该合金过烧程度的判断原则。
First, the preface Almost all deformed aluminum alloy with eutectic transformation of the multi-alloy. Due to the chemical composition and composition of various alloys are different; the same number of alloy transition point, the eutectic temperature is also different. For the heat treatment of deformed aluminum alloy, the harder temperature closer to the lowest eutectic point, over-temperature or local over-temperature caused by tissue burns the greater the risk. LY_ (12) is an Al-Cu-Mg based alloy. The ternary eutectic (Al + CuAl_2 + Al_2CuMg) is very close to the upper quenching temperature and is therefore sensitive to overburning. The relevant units of LY_ (12) over-burned tissue characteristics and over-burning on the impact of static tensile work done a lot of work in this experiment focused on over-temperature quenching on corrosion resistance, technology, physical properties of the impact of exploration and exploration in This is based on the degree of over-burning of the alloy to determine the principle.