Sc含量对6061/AZ31B复合板微观组织及性能的影响  

Effects of Sc Contents on Microstructure and Mechanical Properties of 6061/AZ31B Composite Plate

作　　者：张宁[1] 李元东[1,2] 邱谨[1] 梁晓玉 周宏伟[1,2] 王晟 曹驰[1,3] ZHANG Ning;LI Yuandong;QIU Jin;LIANG Xiaoyu;ZHOU Hongwei;WANG Sheng;CAO Chi(State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals,Lanzhou University of Technology,Lanzhou 730050;Key Laboratory of Nonferrous Metal Alloys and Processing,Ministry of Educa-tion,Lanzhou University of Technology,Lanzhou 730050;Wenzhou Pump and Valve Engineering Research Institute of Lanzhou University of Technology,Wenzhou 325105)

机构地区：[1]兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室,兰州730050 [2]兰州理工大学有色金属合金及加工教育部重点实验室,兰州730050 [3]兰州理工大学温州泵阀工程研究院,温州325105

出　　处：《特种铸造及有色合金》2024年第10期1339-1344,共6页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(52261010)。

摘　　要：以AZ31B作为基板、不同Sc含量(0、0.1%、0.2%、0.3%、0.4%)进行合金化处理的6061液态金属作为浇覆材料,制备固-液铸轧6061/AZ31B复合板。采用光学显微镜、扫描电镜以及XRD分析合金的显微组织和相组成,并对其力学性能进行测试。结果表明,不同Sc含量下的复合板冶金结合界面厚度并未发生明显变化,均为5μm左右,但铝基体的晶粒明显细化。Sc含量为0.2%时,对铝基体晶粒细化效果最好,复合板表现出理想的力学性能,其中抗拉强度和剪切强度分别达到峰值234.841 MPa和70.032 MPa,较未添加Sc的合金分别提高了22.0%和69.3%。Taking AZ31B as substrates and 6061 liquid metals with different Sc contents(0,0.1%,0.2%,0.3%,0.4%)as casting materials,6061/AZ31B composite plate was solid-liquid rolled.The microstructure and phase com⁃positions of alloys were analyzed by OM、SEM and XRD,and mechanical properties were tested.The results indicate that the thicknesses of bonding interface of composite plates with different Sc contents have little change,which are all about 5μm,while grains are significant refined.The refinement effect is optimal with Sc content of 0.2%,and compos⁃ite plates exhibit desirable mechanical properties,where the tensile strength and shear strength reach peak values of 234.841 MPa and 70.032 MPa,respectively,which is 22.0%and 69.3%higher than those of ones without Sc addition.

关 键 词：6061/AZ31B复合板 显微组织 力学性能 Sc含量 

分 类 号：TB331[一般工业技术—材料科学与工程] TG339[金属学及工艺—金属压力加工]