临界退火工艺对500 MPa级风电用钢焊接接头断裂韧性的优化

高崇, 熊理晞, 陈子豪, 梁治智, 麻衡, 何康, 何金珊, 庞建超, 张哲峰

Optimization of Fracture Toughness of Welded Joints of Q500 Steel Plates by Intercritical Annealing

GAO Chong, XIONG Lixi, CHEN Zihao, LIANG Zhizhi, MA Heng, HE Kang, HE Jinshan, PANG Jianchao, ZHANG Zhefeng

图9 各CTOD试样的预制疲劳裂纹区、裂纹扩展区和剪切唇的微观形貌

Fig.9 Microscopic morphology of prefabricated fatigue crack zone (1), crack propagation zone (2) and shear lip (3) of CTOD specimen (a1-a3) OR, (b1-b3) OR-WM, (c1-c3) 720-WM, (d1-d3) 750-WM, (e1-e3) 800-WM