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2 Q500和热处理试样的拉伸性能

Table 2 Tensile properties of Q500 and heat-treated specimens

Specimen σy / MPa σb / MPa At / % Au / % K n OR 622 734 21.27 5.62 978 0.082 OR-WM 493 642 18.06 6.61 965 0.118 720-WM 522 653 17.09 5.51 991 0.117 750-WM 521 614 19.24 6.55 861 0.094 800-WM 555 696 19.84 8.63 969 0.094