Laser direct joining of carbon fibre reinforced plastic to stainless steel

摘要

This study was performed to evaluate the characteristics and strengths of dissimilar jointsnbetween carbon fibre reinforced plastics (CFRP) and stainless steel using high brightnessncontinuous wave disc laser. Tensile shear tests demonstrated that strong CFRP steel joint withny4800 N could be produced. The joints were tightly bonded on atomic or molecular sized levelnthrough Cr–Fe oxide film on the metal surface, and small fragments of type 304 steel werendetected on the fractured CFRP. Many bubbles of submillimetre size were formed all over thenplastic melted zone in the CFRP. The gas compositions inside the bubbles were H2 andnhydrocarbon series as pyrolysis gases of the CFRP as well as N2 in air. These results suggestnstrong chemical and physical bonding of the CFRP on the oxide film of the type 304 plate.nConsequently, it was confirmed that a strong joint could be produced between CFRP and typen304 stainless steel with a laser beam.