热轧工艺对2524铝合金组织和力学性能的影响研究  

Influence of Hot Rolling Technology on Microstructure and Mechanical Properties of 2524 Aluminum Alloy

作　　者：韩俊[1] 孙有平[1] 敖哲 张扬扬[1] 林峰 吕智 

机构地区：[1]广西科技大学机械工程学院,广西柳州545006 [2]中国石油吉林石化公司检测中心,吉林132021 [3]国家特种矿物材料工程技术研究中心,广西桂林541004

出　　处：《热加工工艺》2015年第19期36-38,43,共4页Hot Working Technology

基　　金：国家自然科学基金项目(51301044);广西高校优秀人才计划项目(桂教人才2012[43]号);广西高校科学技术研究项目(YB2014215)

摘　　要：分别以不同热轧温度和不同道次变形量对铸态2524铝合金进行了热轧试验,总变形量为90%。采用光学金相显微镜、拉伸试验机等检测了轧制板材显微组织及力学性能。结果表明:随着热轧温度的逐渐降低,2524铝合金的塑性逐渐减小;在轧制过程中板材不均匀变形导致边部出现裂纹,随着轧制的进行,裂纹不断扩大使试验无法继续;当热轧温度从300℃升高至400℃时,2524铝合金中再结晶晶粒减少,合金的断裂韧性提高;2524铝合金经过400℃热轧和T6热处理后,2524铝合金的抗拉强度达到485MPa,伸长率为13.5%。The hot rolling experiment of as-cast 2524 aluminum alloy was carried out at different temperatures and deformation passes respectively, and the total deformation was 90%. The microstructure and mechanical properties of rolled plates were tested by optical metallographic microscope, tensile testing machine and other equipments. The results indicate that the plasticity of 2524 aluminum alloy decreases gradually with gradually reducing of hot rolling temperature; the inhomogeneous deformation of plates results in edge cracks during the rolling process, and the crack expanding makes experiment not continue with continuation of the rolling; when hot rolling temperature rises fi＇om 300 ℃ to 400 ℃, the recrystallization grain of 2524 aluminum alloy decreases, and the fracture toughness of the alloy improves; after hot rolling at 400 ℃ and T6 heat treatment, the tensile strength of 2524 aluminum alloy is 485 MPa, and the elongation is 13.5%.

关 键 词：2524铝合金 热轧 显微组织 力学性能 

分 类 号：TG335.11[金属学及工艺—金属压力加工]