退火时间对交叉波纹辊轧制Mg/Al复合板微观组织及力学性能的影响  

Effect of Annealing Time on the Microstructure and Mechanical Properties of Mg/Al Laminated Composite Prepared by Cross-Corrugated Rolling

作　　者：赵雪霞 王靓 冯光 赵敬伟[1,2,3] ZHAO Xuexia;WANG Liang;FENG Guang;ZHAO Jingwei(College of Mechanical and Vehicle Engineering,Taiyuan University of technology,Taiyuan 030024,China;b.Engineering Research Center of Advanced Metal Composites Forming Technology and Equipment,Ministry of Education,Taiyuan University of technology,Taiyuan 030024,China;c.TYUT-UOW Joint Research Centre of Advanced Forming and Manufacturing Technology,Taiyuan University of technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学机械与运载工程学院,太原030024 [2]太原理工大学先进金属复合材料成形技术与装备教育部工程研究中心,太原030024 [3]太原理工大学先进成形与制造技术中澳联合研究中心,太原030024

出　　处：《太原理工大学学报》2022年第5期854-860,共7页Journal of Taiyuan University of Technology

基　　金：国家自然科学基金资助项目(52074190,51975398);山西省科技重大专项(20181101008);山西省留学回国人员科技活动择优资助项目(20220007)。

摘　　要：利用自主设计的交叉波纹辊,对Mg/Al复合板进行热轧实验,测试其横向(TD)和轧向(RD)的抗拉强度,并研究了不同退火时间对复合板微观组织和力学性能的影响。结果表明,在总压下率为37.5%,退火温度250℃下分别退火2 h和4 h,结合界面生成了金属间化合物层(IMCs),靠近5052侧为Mg_(2)Al_(3)相,靠近AZ31B侧为Mg_(17)Al_(12)相,其厚度随退火时间的升高而增加;经过退火处理,复合板TD抗拉强度从309.33 MPa降低到276.06 MPa,RD抗拉强度从302.09 MPa降低到274.21 MPa,但是延伸率TD方向从5.25%增加到23.24%,RD方向从3.05%增加到22.74%,随着退火时间的增加,延伸率基本稳定。本研究为具有高性能Mg/Al复合板的制备提供了实验和技术参考。Mg/Al laminated composite was prepared by hot rolling with the self-developed cross-corrugated roll.The tensile strength in TD and RD were tested,and the effects of annealing time on microstructure and mechanical properties were studied.The results indicate that inter-metallic compounds(IMCs)are generated at bonding interface under the condition that the total reduction ratio is 37.5%,annealing temperature is 250℃,while the annealing time is 2 h and 4 h,respectively.There is Mg_(2)Al_(3) phase near 5052 and Mg_(17)Al_(12) phase near AZ31B,and the thickness of IMC layer increases with the increase of annealing time.After annealing,the TD tensile strength of laminated composite decreases from 309.33 to 276.06 MPa,the RD tensile strength decreases from 302.09 to 274.21 MPa,but the elongation in TD direction increases from 5.25%to 23.24%,and the elongation in RD direction increases from 3.05%to 22.74%.With the increase of annealing time,the elongation becomes stable.This study provides an experimental and technical reference for the preparation of Mg/Al laminated composite with high performance.

关 键 词：交叉波纹辊 轧制 Mg/Al复合板 退火时间 微观组织 力学性能 

分 类 号：TH161[机械工程—机械制造及自动化]