7055高强铝合金大型环件轧制技术研究

摘要

To obtain high-strength large unitary product of 7055 aluminum alloy, a study was carried out on the rolling process of high-strength 7055 aluminum alloy large annulus. It designed technological parameters for 7055 aluminum alloy large annulus like rolling temperature and compression ratio, prepared test blanks, conducted soluted-aged technique thermal treatment for the rolled large annulus, and also analyzed grain microstructure and mechanical property. The 7055 aluminum al-loy large annulus got the annular orientation, axis orientation, diametral orientation tensile strength of over 580 MPa, elongation of over 8%, and the diameter ofΦ2000 mm. The study realizes the application of high-strength large unitary product of 7055 aluminum alloy that meets development requirement.%目的：获得7055高强铝合金大型整体构件。方法开展了7055高强铝合金大型环件轧制技术研究，制定了7055高强铝合金环件轧制温度、轧制压缩比等工艺参数，制备了轧制试验坯料，对轧制后的大型环件进行了固溶时效强化热处理，并分析了显微组织和力学性能。结果通过研究，最终获得了切向、径向、轴向三向的抗拉强度均高于580 MPa，伸长率均大于8%，尺寸规格为Φ2000 mm级的7055高强铝合金大型环件。结论成功获得了满足研制需求的7055高强铝合金大型整体构件。