异质层状复合板电控微爆炸界面连接机理研究

基于轻质、强韧、耐蚀或功能性等要求，异质材料层状复合板得到广泛应用，爆炸焊复合板是传统有效的方法，但其存在安全、尺度和均匀受限的劣势。本项目提出“电控微爆炸连接层状复合板材的连续轧制制造技术”，着重研究电控微爆炸界面连接机理。以钛合金/碳钢和铝/镁合金两种典型层状复合板为对象，在连接区域施加多频段脉冲复合电流，研究高频电流邻近效应和集肤效应作用下电流路径及板材两侧表面氧化膜阴极雾化清理机制；探讨界面会合区的低频脉冲电弧放电微爆炸现象及其对界面波形形貌的影响；揭示高低频复合电流作用下会合区电弧和电阻产热机制、接触区协调塑性变形行为、压力区微观塑性连接机理；阐明电控微爆炸轰击作用下连接界面的热力学和动力学行为。表征连续轧制制造的两种层状复合板界面组织、接合强度和宏观力学性能，创新性实现“表面清理～波纹界面～固相连接”一体化，成果将丰富异质材料连接理论，为高品质层状复合板规模化制造提供理论支持。

Based on the requirements of light weight, toughness, corrosion resistance or functionality, heterogeneous composites laminated plates are widely used. Explosive welding of laminated composites plates is a traditional and effective method, but it has the disadvantages of safety, size and uniform limitation. This project proposes "Continuous Rolling Technology of Electro-Control-Micro-Explosion Laminated Composites Plate", focusing on the study of the interface mechanism of electro-micro-explosion. In this study, two typical laminated composites plates, including titanium alloy/carbon steel and aluminum/magnesium alloy, will be used as the research object, and a "high frequency+low frequency pulse" current will be applied in the joining area to study the proximity effect caused by high frequency current, current path inspired by current skin effect and the mechanism of cathode atomization cleaning of oxide film on both sides of plate. The phenomenon of micro-explosion discharge caused by low-frequency pulse arc at the interface junction area and its effect on the waveform interface morphology will be discussed. Besides, the mechanism of arc and resistance heat generation in the confluence zone, the coordinated plastic deformation behavior in the contact zone and the microscopic plastic connection mechanism in the pressure zone will be revealed. The thermodynamic and dynamic behavior of the plate connection interface under the bombardment effect of the electro-controlled micro-explosion will be clarified. Furthermore, the interface structure, joint strength and macro mechanical properties of the two laminated composites plates manufactured by continuous rolling will be characterized. Innovatively the integration of "surface cleaning, corrugated interface and solid phase connection" will be realized, which will enrich the theory of large area bonding, and provide theoretical support for the industrialization of high-quality heterogeneous laminated composites plates.