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Molecular Structure Of Aluminium Composite Panel

Aluminum-based composites have higher specific strength and specific modulus than aluminum alloys, and are used in spaceflight, military aircraft, satellites, space telescopes and automotive engines. To be a good application of aluminum-based composite materials, usually depends on the material itself and other metal materials, the ability to connect. Welding technology is an effective way to connect aluminum matrix composites. This paper discusses the traditional welding methods, research status, existing problems and solutions of American aluminum matrix composites.Aluminium Composite Panel

MMCs are made of reinforced materials and metal matrix materials, and their reinforcing materials are made of continuous long fibers (f), particles, particles (p), whiskers (w) and short fibers (d), and the base material is made of conventional metal materials. At present, extensive research is using MMC, Ti, B4C, B, Al2O3 (alumina) and C (or Gr graphite) particles, whiskers or short fiber reinforced 6061 aluminum or Ti-6Al-4V or Mg MMCS.Aluminium Composite Panel

Typical particle diameter less than 20μm, the amount of up to 35% by volume, whisker diameter of several microns, with several thousand times L / d (aspect ratio), fiber diameter of 10μm ~ 200μm, the amount of added 45%. The two different physical and mechanical properties of the material combined into a kind of MMCS, compared with the performance of metal materials, with high specific strength, specific stiffness, high tensile strength, low or near zero thermal expansion coefficient, high Wear resistance, good dimensional stability in high vacuum or wet or radiation environment, good electrical conductivity, thermal conductivity, fatigue resistance, damping and no gas.Aluminium Composite Panel

Resistance welding is divided into resistance spot welding and resistance seam welding (also known as spot welding and seam welding). Spot welding B / Al thickness is generally 0.25 mm ~ 2.5 mm, the maximum thickness of 6 mm ~ 13 mm. Welding with three intersecting, DC 400 V, 150 kW spot welding machine, the electrode surface radius of 152 mm ~ 304 mm, the electrode pressure is 2 times the spot welding aluminum alloy, welding core diameter is 8 times the thickness of the material, welding Joint force up to 2 205 N. Welding does not damage the fiber material, after welding on the joint solution heat treatment and aging can improve the mechanical properties of joints. The welded joint strength coefficient of multi-layer spot welding is close to 100%.Aluminium Composite Panel