Mg/Al复合板波纹轧变形特点与微观组织演变

doi:10.3901/JME.2025.08.085

摘要/Abstract

摘要： 针对普通平轧制备复合板存在的结合强度低、轧后弯曲严重等难题，采用波平轧工艺制备Mg/Al复合板，并对其进行力学性能测试。波平轧制备的Mg/Al复合板抗拉强度为324.50 MPa，比普通平轧提高了11.8%；剪切强度为82.55 MPa，比普通平轧提高了8.0%。通过建立波纹轧Mg/Al复合板三维热-力耦合有限元模型，分析轧制过程中应力、应变、温度变化规律。波纹轧过程中镁板表面剪应力方向发生多次改变，变形区内交替出现多个前滑区与后滑区，形成多个搓轧区。这种剪切作用产生了更多的变形热，提升了镁板温度，协调了异种金属变形。融合有限元得到的变形区金属温度、应变随时间的变化规律，利用轧卡试验研究了波纹轧变形区内特征位置的微观组织演变规律，并揭示了波纹轧Mg/Al复合板的结合机理。

关键词: Mg/Al复合板, 波纹轧, 力学性能, 组织演变

Abstract: In order to solve the problems of low bonding strength and serious shape warpage of composite plates prepared by traditional flat roll rolling process, Mg/Al clad plates were prepared by corrugated+flat rolling and the mechanical properties were tested. The tensile strength of the Mg/Al composite plate obtained by corrugated+flat rolling is 324.50MPa, which is 11.8% higher than the traditional flat rolling; the shear strength is 82.55MPa, which is 8.0% higher than the traditional flat rolling. A three-dimensional thermal-mechanical coupled finite element model for corrugated rolling of Mg/Al clad plates was established, and the changes in stress, strain, and temperature during the rolling process were analyzed. During the corrugated rolling process, the direction of shear stress on the surface of the Mg plate changes multiple times, leading to the alternating presence of multiple forward slip zones and backward slip zones within the deformation zone, and the formation of multiple cross shear zones. This shearing action generated additional deformation heat, increased the temperature of the Mg plate, and coordinated the deformation of dissimilar metals. By integrating the characteristics of metal temperature and strain distribution obtained from finite element model, the microstructure evolution at characteristic positions in the corrugated rolling deformation zone was analyzed through rolling block experiments, and the bonding mechanism of Mg/Al clad plate prepared by corrugated rolling was revealed.

Key words: Mg/Al Clad plate, corrugated rolling, mechanical properties, microstructure evolution

中图分类号:

TG335

刘元铭, 刘延啸, 申宏卓, 王振华, 王涛. Mg/Al复合板波纹轧变形特点与微观组织演变[J]. 机械工程学报, 2025, 61(8): 85-97.

LIU Yuanming, LIU Yanxiao, SHEN Hongzhuo, WANG Zhenhua, WANG Tao. Deformation Characteristic and Microstructure Evolution of Mg/Al Clad Plate in Corrugated Rolling[J]. Journal of Mechanical Engineering, 2025, 61(8): 85-97.

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