锻压技术

厚度比与退火温度对铜/铝冷轧板冲压性能与界面结合强度的影响

英文标题：Influences of thickness ratio and annealing temperature on stamping properties and interfacial bonding strength for copper/aluminum cold rolled plate

作者：陈才1 孔诚1 王名川1 赵金库2 杜忠华3 杨森4

单位：1. 南京理工大学中法工程师学院 2. 黑龙江北方工具有限公司 3. 南京理工大学机械工程学院 4. 南京理工大学材料科学与工程学院

关键词：Cu/Al复合板材冲杯试验杯突试验力学各向异性行为界面结合强度

分类号：TB331

出版年,卷(期):页码：2023,48(7):82-92

摘要：

为满足弹药智能制造和轻量化需求，采用冷轧法制备了厚度比分别为1∶1、1∶5和1∶9的Cu/Al复合板，研究厚度比对复合板冲压性能与界面结合强度的影响。通过单轴拉伸试验获得了材料的基本力学性能和各向异性参数，以类拉深工艺的冲杯试验和杯突试验定量表征Cu/Al复合板的冲压性能。进一步研究了退火温度对复合板力学各向异性行为和界面结合强度的影响，以调控复合板的冲压性能。结果表明，3种Cu/Al复合板冲压成形件的质量良好，铜层厚度比越高，复合板的冲压性能越好；经过500 ℃/120 min退火后，板材的力学各向异性参数达到最低的0.027，冲压成形性能明显改善；随着退火温度的升高，扩散层的厚度逐渐变大，界面结合强度先升高后降低。研究结果可为制备具有优良冲压性能的Cu/Al复合板提供理论指导。

In order to meet the needs of intelligent manufacturing and lightweight ammunition, Cu/Al composite plate with the thickness ratios of 1∶1, 1∶5 and 1∶9 were prepared by cold rolling method, and the influences of thickness ratio on stamping properties and interfacial bonding strength of composite plates were studied. Then, the basic mechanical properties and anisotropy parameters of materials were obtained by uniaxial tensile tests, and the stamping properties of Cu/Al composite plate were quantitatively characterized by the deep drawing cups testing and Erichsen cupping test. Furthermore, the influences of annealing temperature on the mechanical anisotropy behavior and interfacial bonding strength of composite plates were studied to regulate the stamping properties of composite plate. The results show that the quality of stamping parts for three kinds of Cu/Al composite plates is good, and the higher the thickness ratio of copper layer is, the better the stamping properties of composite plate are. After annealing at 500 ℃/120 min, the mechanical anisotropy parameter of plate reaches the lowest value of 0.027, and the stamping properties is significantly improved. As the annealing temperature increases, the thickness of diffusion layer gradually increases, and the interfacial bonding strength first increases and then decreases. Thus, the research results con provide the theoretical guidance for the preparation of Cu/Al composite plates with excellent stamping properties.

基金项目：

国家自然科学基金资助项目（51901101，11802131）

作者简介：陈才（1985-），男，博士，讲师 E-mail：cai.chen@njust.edu.cn

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