| 摘要 |
PURPOSE: A high-strength high-toughness material and a method for manufacturing a tower flange using the same are provided to apply the material with improved weldability and corrosion resistance to a tower flange for a wind turbine. CONSTITUTION: A high-strength high-toughness material comprises 0.12-0.16 weight% of C, 0.20-0.50 weight% of Si, 1.30-1.50 weight% of Mn, 0.02 weight% or less of P, 0.01 weight% or less of S, 0.35 weight% or less of Cu, 0.20-0.50 weight% of Ni, 0.15 weight% or less of Cr, 0.15 weight% or less of Mo, 0.10 weight% or less of V, 0.05 weight% or less of Nb, 0.03-0.07 weight% of Al, 0.03 weight% or less of Ti, 0.015 weight% or less of N, and the rest Fe. The material has a carbon equivalent(Ceq) of 0.45 or less, expressed as the following equation 1: Ceq = PC + P_Mn/6 +(P_Cr+P_Mo+P_V)/5 +(P_Ni+P_Cu)/15. [Reference numerals] (110) Slab; (120) Heating; (130) Cogging, upsetting and piercing; (140) Reheating; (150) Ring rolling mill; (160) Ring product; (170) Heat treatment; (180) Flange processing; (AA) Start; (BB) End |
