The effects of substituting Ti for V on mechanical properties in weathering type high strength low alloy steel (Cor-Ten B) were investigated.
Two different final rolling temperatures (750℃,830℃) were employed in the controlled rolling.
Two different cooling rates (air cooling, water spraying) after controlled rolling were applied to determine the effects of cooling rate and final rolling temperature on mechanical properties.
Strength and impact toughness were increased as the final rolling temperature decreased.
Accelerated cooling after final controlled rolling at 830℃ greatly enhanced the strength and impact toughness in the 0.1 Ti weathering steel.
Ti added alloy exhibited better isotropic impact behavior by forming globular shape of sulfied inclusion, compared with V-containing alloy.
High cycle fatigue resistance of Ti-containing alloy was higher than that of V-alloy due to the higher tensile strength.
The fatigue strength of Ti-containing alloy was about 20% higher, compared with the V-containing alloy.
