轧制变形量对Al/AZ31/Al复合板组织和界面结合性能的影响  

Effect of Rolling Deformation Amount on Microstructure and Interface Bonding Properties of Al/AZ31/Al Composite Plates

作　　者：王德峰 唐昌平[1,2] 唐燕生 WANG Defeng;TANG Changping;TANG Yansheng(College of Mechanical and Electrical Engineering,Hunan University of Science and Technology,Xiangtan 411201,China;Hunan Provincial Engineering Research Center of High-Efficacy Light Alloy Component Forming Technology and Damage Resistance Evaluation,Hunan Provincial Key Laboratory of High Temperature Wear Resistant Materials and Preparation Technology,Hunan Provincial Key Laboratory of Advanced Materials for New Energy Storage and Conversion,Xiangtan 411201,China)

机构地区：[1]湖南科技大学机电工程学院,湘潭411201 [2]高功效轻合金构件成形技术及耐损伤性能评价湖南省工程研究中心,高温耐磨材料及制备技术湖南省国防科技重点实验室,新能源储存与转换先进材料湖南省重点实验室,湘潭411201

出　　处：《机械工程材料》2024年第7期25-29,共5页Materials For Mechanical Engineering

基　　金：湖南省教育厅优秀青年项目(19B214)。

摘　　要：用两块1060纯铝轧制板夹持固溶态AZ31镁合金板组成“三明治”结构,在400 r·min^(−1)轧辊转速、400℃轧制温度下进行轧制制备Al/AZ31/Al复合板,研究了轧制变形量(30%,45%,60%,80%)对复合板组织及界面结合性能的影响。结果表明:当轧制变形量为30%时,镁合金板与一侧铝板尚未复合,镁合金晶粒粗大,并存在大量孪晶;当轧制变形量为45%时,镁合金板与两侧铝板结合紧密,镁合金发生了动态再结晶,晶粒细化;当轧制变形量为60%和80%时,镁合金晶粒进一步细化,但界面处铝板出现开裂。随着轧制变形量由45%增加到80%,界面结合力降低。当轧制变形量为45%时,拉伸力达到峰值后趋于稳定,复合板各部位界面均结合良好;当轧制变形量为60%时,拉伸力达到峰值后先降低再趋于稳定,各部位界面结合力差异较大;当轧制变形量为80%时,拉伸力呈分阶段上升的趋势,各部位界面结合力的差异更大。复合板获得较优的组织和界面结合性能的轧制变形量为45%。Sandwich structures were formed by clamping a solid soluted AZ31 magnesium alloy plate with two pieces of 1060 pure aluminum rolled plates,and then was rolled to prepare Al/AZ31/Al composite plates at 400 r·min^(−1) roll speed and 400℃rolling temperature.The effects of rolling deformation amount(30%,45%,60%,80%)on the microstructure and interface bonding properties of the composite plates were studied.The results show that when the rolling deformation amount was 30%,the magnesium alloy plate and the aluminum plate on one side were not combined,the magnesium alloy grains were coarse,and there were a lot of twins.When the rolling deformation amount was 45%,the magnesium alloy plate and the aluminum plate on both sides were tightly bonded,the dynamic recrystallization of magnesium alloy occurred,and the grains were refined.When the rolling deformation amounts were 60%and 80%,the grains of magnesium alloy were further refined,but the aluminum plate at the interface cracked.The interface bonding force decreased with the rolling deformation amount increasing from 45%to 80%.When the rolling deformation amount was 45%,the tensile force then tended to be stable after reaching the peak value,and the interface of each part of the composite plate was well bonded.When the rolling deformation amount was 60%,the tensile force decreased and then tended to be stable after reaching the peak value,and the interface bonding force of each part was different greatly.When the rolling deformation amount was 80%,the tensile force increased by stages,and the difference of interface bonding force of each part was greater.The rolling deformation amount for composite plates to obtain good microstructure and interface bonding performance was 45%.

关 键 词：Al/AZ31/Al复合板 轧制变形量 显微组织 界面结合性能 

分 类 号：TG335.81[金属学及工艺—金属压力加工]