Determination of Mechanical Properties of CO2 Laser Welded Dual Phase Steels
Ekrem Öztürk Hüseyin Arıkan Serkan Toros Mehmet Kayrıcı
AbstractThe modern automotive industry is increasingly reducing the weight of vehicles by applying new technologies to materials processing and lightweight materials, thus reducing the fuel consumption. Advanced High-Strength Steels are good potential for this purpose. In this context, Dual Phase steels of grade 600 and 800 were investigated in this study. A tailor-welded blank was produced by CO2 welding of DP600 and DP800 steels in 1,8 mm and 1,5 mm thickness, respectively. The effects of laser power and welding speed on mechanical properties of tailorwelded blanks were examined. It was found that laser power of 3 kW and welding speed of 4 m/s are the best combinations in terms of yield and tensile strength, strain hardening exponent and strength coefficients of the laser welded blanks.