均匀化退火处理对2524铝合金组织及硬度的影响  

Influence of Homogenization Annealing on Microstructures and Hardness of 2524 Aluminum Alloy

作　　者：韩俊[1] 孙有平[1] 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]国家特种矿物材料工程技术研究中心,广西桂林541004

出　　处：《铸造技术》2015年第6期1427-1429,共3页Foundry 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：采用光学金相显微镜、维氏硬度计及拉伸试验机,研究了不同均匀化处理工艺对2524铝合金微观组织及硬度的影响规律。结果表明,随着均匀化退火温度的升高,非平衡第二相充分溶入基体;2524铝合金在485℃/36 h均匀化处理后,晶内偏析基本消除,晶间组织分布均匀,且处理后合金硬度增加,抗拉强度为485 MPa,伸长率达13.5%,表现出较高强度和塑性。Through using optical microscopy, Vickers hardness tester and tensile testing machine, the influence of homogenization annealing on microstructures and hardness of 2524 aluminum alloy were investigated. The results show that the increase of homogenizing annealing temperatures can promote the non-equilibrium phase dissolve into the matrix.After heat treatment at 485 ℃ for 36 h, the elements segregations in the alloy largely eliminate with uniform intergranular microstructures. Meanwhile, after the heat treatment, the alloy presents excellent strength and plasticity, and the hardness is increased by 24%, tensile strength reach 485 MPa and elongation is up to 13.5%.

关 键 词：2524Al 微观组织 力学性能 均匀化退火 

分 类 号：TG166.3[金属学及工艺—热处理]