车身用铝合金结构件设计、工艺、性能调控及应用基础

Aluminum alloys are considered to be idea llightweight materials for vehicle body due to their excellent properties. But the application of aluminum alloy in the body structure is still very limited, and the relevant basic research is not systematic. Based on the independently developed new automobile aluminum alloy and extrusion-bending-quenching integration innovation processing, the present project intends to study the structure design, processing optimization and property control for typical aluminum vehicle structure components. Knowledge coupling method will be established for the design of aluminum structure component based on the application of new materials and multi material matching optimization. The microstructure evolution and inheritance mechanism will be revealed in the whole processes of extrusion - bending continuous forming, heat treatment and argon arc welding，by using advanced online in situ observation technique. The relationship between the processing, microstructure and property will be determined. Theory system and advanced technology prototype will be developed for the preparation processing and microstructure and property control of aluminum structural components. Key performance testing methods of crash safety and fatigue durability will be investigated from the perspective of material, component and vehicle. Evaluation system for the aluminum structure component will be established. The research results will provide effective technical support for the design, manufacturing and application of aluminum vehicle structure components.

铝合金因其优异的性能被认为是汽车轻量化的理想材料，但目前铝合金在车身结构件上的应用非常有限，相关的基础研究仍不成体系。本项目拟以自主开发的车身用新型铝合金和挤压-弯曲-淬火一体化创新工艺为基础，系统研究典型铝合金车身结构件开发过程中的结构设计、工艺优化和组织性能调控等关键基础理论问题。建立零部件设计的知识耦合方法，形成基于新材料应用和多材质匹配优化的设计规范；采用先进的在线原位观测实验技术，揭示挤压-弯曲连续成形、时效热处理和氩弧焊接等制备全流程中组织演变机理及遗传累积效应，探明工艺、组织和性能之间的内在联系，形成车身铝合金结构件制备工艺与组织性能控制的系统理论体系和先进工艺技术原型；分别从合金材料、零件和整车的角度，开展碰撞安全和疲劳耐久等关键性能测试方法研究，获得铝合金车身结构件系统评价体系。项目研究成果将为车身关键铝合金零部件的设计、制造与应用提供有效的共性技术支持。

针对铝合金材料及零部件在汽车车身中的应用技术不成熟问题，本项目以自主开发的车身用新型铝合金和挤压-弯曲-淬火一体化创新工艺为基础，系统研究了典型铝合金车身结构件开发过程中的结构设计、工艺优化和组织性能调控等关键基础理论问题。建立了零部件设计的知识耦合方法，形成了基于新材料应用和多材质匹配优化的设计规范；采用先进的在线原位观测实验技术，揭示了挤压-弯曲连续成形、时效热处理和氩弧焊接等制备全流程中组织演变机理及遗传累积效应，探明了工艺、组织和性能之间的内在联系，形成了车身铝合金结构件制备工艺与组织性能控制的系统理论体系和先进工艺技术原型；从合金材料、零件和整车的角度，开展了碰撞安全和疲劳耐久等关键性能测试方法研究，获得了铝合金车身结构件系统评价体系。通过项目研究，已发表学术论文46篇（其中SCI收录24篇、EI收录13篇），申请专利14件，获得省部级一等奖2次。所形成的铝合金车身零部件材料、工艺、性能验证数据库已完成试制和中试验证，具有巨大的应用空间。