作　　者： ; ; ; ;

机构地区： 中南大学材料科学与工程学院

出　　处： 《宇航材料工艺》 2004年第6期45-49,共5页

摘　　要： 研究了添加微量Sc和Zr对系列Al-Mg-Mn合金显微组织和拉伸性能的影响。结果表明:微量Sc和Zr添加到Al-Mg-Mn合金中,热轧态合金的拉伸强度和屈服强度分别提高了75 MPa-90 MPa和90 MPa^94 MPa;经冷轧后340℃／1 h稳定化退火,合金拉伸强度和屈服强度分别增加了85 MPa-95MPa和90 MPa^100 MPa,而延伸率仍保持在11％-12％;并能显著细化合金的铸态晶粒,强烈抑制合金的热轧态和板材冷轧后退火过程中的再结晶,晶粒组织成纤维状;使合金强化的机制为晶粒细化强化、亚结构强化和铝钪锆化合物粒子引起的析出强化。 The effect of adding trace Sc and Zr on the microstructure and properties of a series of Al-Mg-Mn alloy is studied. The results show that the addition increases the tensile strength and yield strength of as-hot rolled alloy by 75 MPa to 90 MPa and 90 MPa to 94 MPa, respectively. After cold-rolling and annealing at 340℃ for 1 h, the tensile strength and yield strength of the alloys increase by 85 MPa to 95 MPa and 90 MPa to 100 MPa respectively, but the ductility still remains 11% to 12%. Minor amount of Sc and Zr can fine as-cast grains size and inhibit recrys tallization of hot rolled alloy and during annealing after cool rolling, leading to fibrous grain structure. The strengthening mechanism caused by adding minor amount of Sc and Zr is fine-grain strengthening, substructure strengthening and precipitation strengthening.

关 键 词： 合金组织 冷轧 析出强化 铸态 屈服强度 热轧 晶粒细化 微量 拉伸强度 锆化合物

领　　域： [一般工业技术] [航空宇航科学与技术] [航空宇航科学技术] [金属学及工艺] [一般工业技术] [金属学及工艺]