碳纤维/环氧树脂复合材料-铝合金层合板深拉成型特性

碳纤维增强树脂复合材料（Carbon fiber reinforced plastic，CFRP）因其轻质高强的特点，越来越多地应用到汽车轻量化设计和制造中。为研究CFRP板件及CFRP-Al层合板深拉成型影响因素，加速CFRP零部件产业化进程，本文通过DSC测试分析了CFRP预浸料的固化放热过程，以此为依据，用热压罐制备了不同后固化温度下成型的CFRP板材及单向、编织两种预浸带铺层的CFRP-Al层合板，用Inspekt table 100材料试验机对上述两种板材分别做了深拉试验。考虑到提高制备效率，用打磨、打磨+涂覆硅烷偶联剂、阳极氧化+涂覆硅烷偶联剂三种方式对铝合金板进行表面处理，不经热压罐固化成型，直接和正交对称铺层的单向预浸带一起在Inspekt table 100材料试验机的环境箱中混合温深拉，固化成形。并通过金相显微镜、SEM进行显微组织观察，验证后固化温度、深拉环境温度、预浸带的种类对CFRP板材及CFRP-Al层合板深拉成型性能的影响及铝合金板表面处理方式对CFRP叠层预浸带、铝合金板材混合温深拉成型性能的影响。结果表明，适当降低后固化温度、提高深拉环境温度有利于板材二次深拉成型。编织预浸带较单向预浸带能更好地承受压力，深拉成型质量更优。阳极氧化+涂覆硅烷偶联剂的表面处理方式一方面能在铝合金板材表面形成致密、均匀的微孔，另一方面硅烷偶联剂能很好地促进铝合金板材和CFRP的界面结合，有利于深拉成型。 

Deep drawing characteristics of carbon fiber/epoxy resin composite- aluminum alloy laminates

Due to its light mass and high strength, carbon fibre reinforced plastics (CFRP) is increasingly used in automotive light mass design and manufacturing. To study CFRP panels and influencing factors of drawing of CFRP-A1 laminates and accelerate the industrialization of composite parts, the curing and exothermic process of CFRP was analyzed by differential scanning calorimetry(DSC) test. Then, CFRP sheets and layer CFRP-A1 laminate with unidirectional and woven prepreg were prepared by autoclave at different post cure temperatures. The Inspelkt table 100 material testing machine was used to carry out the drawing test on the above-mentioned plates. In order to improve the preparation efficiency, the aluminum alloy plate surface was processed by grinding, grinding and coating silane coupling agent, anodizing and coating silane coupling agent. Without curing by autoclave, aluminum alloy plate and unidirectional prepreg tape with orthogonally symmetrically layered were combined warm drawing tamping in an environmental chamber of an Inspekt table 100 material testing machine. The microstructure was observed by metallographic microscope and SEM to verify the impact of post-cure temperature, the deep drawing ambient temperature, the type of prepreg tape and the surface treatment of the aluminum alloy plate on drawing properties of CFRP and CFRP-A1 laminates. The experiment results show that it is beneficial to the secondary drawing formability of the sheet by appropriately reducing the post-cure temperature and increasing the drawing temperature. The woven prepreg can withstand pressure better than the unidirectional prepreg leading to high drawing quality. The surface treatment of anodizing and coating silane coupling agent can form denser and uniform micropores on the surface, the combination can form a better interface, which is conducive to drawing.