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首页> 外文期刊>Journal of Materials Engineering and Performance >Forming and Warm Die Quenching Process for AA7075 Aluminum Alloy and Its Application
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Forming and Warm Die Quenching Process for AA7075 Aluminum Alloy and Its Application

机译：AA7075铝合金的成型和温模淬火过程及其应用

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摘要

In order to investigate the effect of die temperature on the microstructure and mechanical properties of formed components, the forming and quenching experiments on U-shaped components of 7075 aluminum alloys at different die temperatures ranging from 25 to 350?°C were carried out. Mechanical properties of formed components were measured by Vickers hardness measurement, tensile test and electrical conductivity test. Microstructure evolution was observed by optical microscopy and scanning electron microscopy. In order to evaluate the effect of die temperature on the shape accuracy of formed components, the springback of U-shaped component was analyzed. The results showed that the Vickers hardness and tensile strength (TS) of formed components decreased with the increase in die temperature. The reduction in strength of the formed component was not obvious until die temperature reached 250?°C. The Vickers hardness and TS were 180?HV and 585?MPa, which were similar to those in T6 temper. When die temperature increased to 350?°C, the Vickers hardness and TS dropped to 93?HV and 445?MPa, respectively. As die temperature increased, the grain size increased gradually and the precipitated phase became larger. Springback angle of formed components decreased with the increase in die temperature. The die temperature should be 200?°C for forming and warm die quenching process of 7075 aluminum alloys to obtain enough strength effect and shape accuracy.
机译：为了研究模芯温度对形成组分的微观结构和机械性能的影响，进行了7075铝合金U形组分的成形和淬火实验，在不同的模具温度范围为25至350℃。通过维氏硬度测量，拉伸试验和电导率试验测量成分组分的力学性能。光学显微镜和扫描电子显微镜观察微观结构演化。为了评估模芯温度对形成部件的形状精度的影响，分析了U形组分的回弹。结果表明，由于模具温度的增加，所形成的组分的维氏硬度和拉伸强度（Ts）降低。在模具温度达到250℃的情况下，形成的组分的强度的降低不明显。维氏硬度和TS为180℃，585℃，其与T6脾气相似。当管芯温度升至350℃时，长度的硬度和Ts分别落到93℃和445℃。随着管芯温度的增加，晶粒尺寸逐渐增加，沉淀相变大。随着模芯温度的增加，所形成部件的回弹角度降低。模具温度应为200°C，用于形成7075铝合金的成型和温模淬火过程，以获得足够的强度效果和形状精度。

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