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采用铸锭冶金法制备了含铒0%、0.4%、0.6%的Al-Zn-Mg-Cu合金,用金相显微镜、扫描电镜、能谱分析以及透射电镜研究了Er对合金的组织及性能的影响。试验结果表明,含Er合金在凝固过程中形成一次Al3Er相,该相与α(Al)基体具有相同的晶体结构,晶格常数接近,可以有效的细化合金晶粒,提高合金的抗拉强度,在T6状态下含0.4%Er的2#合金抗拉强度为577.12 MPa,屈服强度为514.96 MPa,延伸率为11.8%。
Al-Zn-Mg-Cu alloys containing 0%, 0.4% and 0.6% erbium were prepared by the ingot metallurgy method. The microstructure and properties of Er alloy were investigated by metallographic microscope, scanning electron microscopy, energy dispersive spectroscopy and transmission electron microscopy Impact. The experimental results show that the Al3Er phase is formed during the solidification process of the Er-containing alloy. This phase has the same crystal structure as the α (Al) matrix. The lattice constants are close to each other, which can effectively refine the alloy grains and improve the tensile strength The tensile strength of # 2 alloy with 0.4% Er at T6 is 577.12 MPa, the yield strength is 514.96 MPa, and the elongation is 11.8%.