点阵强变形轧制镁/铝层合板成形特性

冯光; 郜豪杰; 申依伦; 张恒

doi:10.13801/j.cnki.fhclxb.20221024.003

点阵强变形轧制镁/铝层合板成形特性

doi: 10.13801/j.cnki.fhclxb.20221024.003

冯光^{1, 2, 3, ,},
郜豪杰¹,
申依伦¹,
张恒¹

1.
太原理工大学　机械与运载工程学院，太原 030024
2.
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

基金项目: 国家自然科学基金(52074190)；山西省留学回国人员科技活动择优资助重点项目(20220007)；山西省科技重大专项(20181101008)

详细信息

通讯作者:
冯光，博士，副教授，研究方向为金属层合板轧制理论与技术　E-mail：feng_guang@yeah.net

中图分类号: TG335.1；TB331
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- 文章访问数: 521
- HTML全文浏览量: 349
- PDF下载量: 21
- 被引次数: 0
出版历程
- 收稿日期: 2022-09-08
- 修回日期: 2022-10-11
- 录用日期: 2022-10-15
- 网络出版日期: 2022-10-24
- 刊出日期: 2023-08-15

Forming characteristics of Mg/Al laminated composite based on lattice severe deformation rolling

FENG Guang^{1, 2, 3
, ,},
GAO Haojie¹,
SHEN Yilun¹,
ZHANG Heng¹

1.
College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan 030024, China
2.
Engineering Research Center of Advanced Metal Composites Forming Technology and Equipment, Ministry of Education, Taiyuan 030024, China
3.
TYUT-UOW Joint Research Centre of Advanced Forming and Manufacturing Technology, Taiyuan University of Technology, Taiyuan 030024, China

Funds: National Natural Science Foundation of China (52074190); Fund Program for the Scientific Activities of Selected Returned Overseas Professionals in Shanxi Province (20220007); Major Science and Technology Project of Shanxi Province (20181101008)

摘要

摘要: 针对镁/铝层合板轧制过程中存在结合强度低、翘曲和边裂严重等技术难题，研究了基于点阵强变形轧制(Lattice severe deformation rolling，LSDR)原理以波纹辊对其一道次轧制成形。借助有限元数值计算分析了金属板材在复杂辊缝下的塑性流动规律和成形特点，并进行了轧制实验。结果表明：LSDR原理轧制镁/铝层合板时，波纹辊能够对难变形的镁合金及结合界面处产生点阵状分布的局部强非均匀变形作用，增强镁合金沿轧向(Rolling direction，RD)和横向(Transverse direction，TD)的塑性流动，并在结合界面处产生更大的剪切应力。相较于传统平轧，LSDR原理轧制所得镁/铝层合板的抗拉强度、拉剪强度和抗弯强度均有提高，其中拉剪强度最大增幅达77%；并且结合界面均匀可靠，产生约5 μm厚的扩散层。研究内容为高质量镁/铝层合板的制备提供了有价值的参考。
- 点阵强变形轧制 /
- 波纹辊 /
- 镁/铝层合板 /
- 界面 /
- 结合性能
Abstract: Aiming at the technical problems such as low bonding strength, serious warpage and edge cracks in the rolling process of Mg/Al laminated composite, one rolling pass forming with a corrugated roll was studied based on lattice severe deformation rolling (LSDR) principle. The plastic flow law and forming characteristics of the metal plates at complex roll gap were analyzed by finite element numerical calculation, and the rolling experiment was performed. The results show that a series of local strong non-uniform deformation effects distributed as a lattice structure can be applied on the magnesium alloy plate and at the bonding interface by the corrugated roll, and the plastic flow along both rolling direction (RD) and transverse direction (TD) has been strengthened when the LSDR principle is used. Additionally, larger shearing stress can be produced at the bonding interface. Compared with the traditional rolling using flat rolls, the tensile strength, tensile-shear strength and bending strength of the laminated composite prepared on the LSDR principle are significantly improved, and the maximum increase rate of tensile-shear strength obtained reaches 77%. Meanwhile, the bonding interface is uniform and reliable. The diffusion layer is about 5 μm thick. This study provides a valuable reference for the preparation of high-quality Mg/Al laminated composite.
- lattice severe deformation rolling /
- corrugated roll /
- Mg/Al laminated composite /
- interface /
- bonding performance

HTML全文

图 1 点阵强变形轧制(LSDR)原理制备镁/铝层合板方案

Figure 1. Scheme of preparing Mg/Al laminated composite based on lattice severe deformation rolling (LSDR) principle

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图 2 镁/铝层合板轧制实验设备

Figure 2. Equipment for Mg/Al laminated composite rolling

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图 3 镁/铝层合板界面处沿轧向(RD)和横向(TD)等效应变

Figure 3. Effective strain of Mg/Al laminated composite along rolling direction (RD) and transverse direction (TD) at the bonding interface

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图 4 镁/铝层合板样件

Figure 4. Mg/Al laminated composite sample

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图 5 镁/铝层合板力学性能测试结果

Figure 5. Mechanical property test results of the Mg/Al laminated composite

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图 6 镁/铝层合板结合界面波峰和波谷处的SEM图像及能谱分析线扫描结果

Figure 6. SEM images and line scan results by energy dispersive spectroscopy of the Mg/Al laminated composite bonding interface peak and trough

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图 7 镁/铝层合板沿RD和TD结合界面波谷处微观结构

Figure 7. Microstructure of the bonding interface trough along RD and TD of the Mg/Al laminated composite

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图 8 镁/铝层合板结合界面波谷处的再结晶晶粒分布及占比

Figure 8. Distribution and proportion of recrystallized grains at bonding interface trough of the Mg/Al laminated composite

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表 1 AZ31B镁合金与5052铝合金的化学成分

Table 1. Chemical composition of AZ31B Mg alloy and 5052 Al alloy wt%

Material Mg Cu Ca Mn Si Al Zn Cr Fe

AZ31B Mg alloy Others 0.01 0.04 0.8 0.07 3.2 1.2 – –
5052 Al alloy 2.2-2.8 0.1 – 0.1 0.25 Others 0.1 0.15-0.35 0.4

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