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2 各焊接试样母材、热影响区(细晶区和粗晶区)和焊缝区的微观组织

Fig.2 Microstructure of the base metal (1), the heat affected zone (fine-grained zone (2) and coarse-grained zone (3)), and the weld metal (4) of each welded specimens (a1-a4) OR-WM, (b1-b4) 720-WM, (c1-c4) 750-WM, (d1-d4) 800-WM