As an important lightweight material, aluminum honeycomb panels are widely used in the aviation manufacturing industry. They have also been used on foreign railway vehicles for a long time. They are widely used, such as French TGV series and Italian ETR series high speed trains. Domestic honeycomb panels have only been used in recent years. Although certain effects have been achieved, their application scope is still very limited. The understanding of the characteristics and application scope of honeycomb sandwich materials needs to be further strengthened and expanded.
Aluminum honeycomb panel is a composite material composed of aluminum honeycomb core material and surface material. In summary, aluminum honeycomb panel has the following basic characteristics:
(1) Light weight, high specific strength, especially high bending rigidity, the aluminum honeycomb panel of the same quality has about 5 times the bending rigidity of aluminum alloy.
(2) It has extremely high surface flatness and high temperature stability, easy to form and not easy to deform. Aluminum honeycomb panel can not only be made into flat panel, but also can be made into double-curved and single-curved panels.
(3) Excellent corrosion resistance, insulation and environmental adaptability, which can adapt to various harsh operating environments of railway EMUs and passenger cars; In addition, such plates can be treated with surface spray painting or surface pasted fire prevention board to achieve Good decoration and fire resistance.
(4) Unique resilience, which can absorb vibration energy and has good sound insulation and noise reduction effects.
(5) The fire protection level is high, and it meets the Class A requirements in the international fire prevention standard UIC564-2-199l "Fire Prevention and Fire Protection Rules for Railway Passenger Cars or International Unions Using Similar Vehicles".
(6) After the fire, the smoke density meets the high-level international railway fire protection standards and has good self-extinguishing properties; the low heat value can form a refractory layer, can reduce the emitted smoke and toxic gases, and has excellent environmental protection performance .
(7) Excellent molding manufacturing processability, which can meet the requirements of complex shapes and high stability requirements for interior parts of railway vehicles.
