Nb对中碳钢相变和组织细化的影响*

吴斯, 李秀程, 张娟, 尚成嘉

EFFECT OF Nb ON TRANSFORMATION AND MICROSTRUCTURE REFINEMENT IN MEDIUM CARBON STEEL

WU Si, LI Xiucheng, ZHANG Juan, SHANG Chengjia

表2 实验钢的力学性能

Steel Yield strength MPa Tensile strength MPa Elongation % Reduction of area % Impact energy (-20 ℃) J A 385 748 22.8 55.3 7 B 455 733 22.3 53.8 19