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

表5 Q500和热处理试样的CTOD实验结果

Table 5 CTOD test results of Q500 and heat-treated specimens

Specimen B / mm W / mm S / mm a0 / mm ∆a / mm F / kN R / mm Vp / mm δ / mm Type OR 19.98 39.95 160 22.72 0.23 -37.42 28.37 1.44 0.289 u OR-WM 20.18 39.94 160 22.59 1.78 -41.56 29.47 1.42 0.338 m 720-WM 20.18 40.07 160 22.02 0.24 -38.09 28.00 1.55 0.381 u 750-WM 20.09 39.68 160 22.27 1.10 -39.96 28.62 4.59 1.094 m 800-WM 20.01 39.87 160 22.01 0.85 -45.36 28.28 2.90 0.722 m