440 MPa级高强钢焊缝金属的断裂韧性

曾道平, 安同邦, 郑韶先, 代海洋, 曹志龙, 马成勇

Fracture Toughness of Weld Metal of 440 MPa Grade High-strength Steel

ZENG Daoping, AN Tongbang, ZHENG Shaoxian, DAI Haiyang, CAO Zhilong, MA Chengyong

图4 焊缝金属组织照片

Fig.4 Photos of weld metal microstructure (a) columnar crystal (OM), (b) columnar crystal (TEM), (c) interpass (OM), (d) interpass (TEM)