预热对690 MPa级HSLA钢对接接头力学性能的影响

汤忖江, 安同邦, 彭云, 马成勇, 林纯丞, 石照夏, 秦哲

Effect of Preheating on Microstructure and Mechanical Properties of Butt Joint of 690 MPa Grade HSLA Steel

TANG Cunjiang, AN Tongbang, PENG Yun, MA Chengyong, LIN Chuncheng, SHI Zhaoxia, QIN Zhe

图9 冲击断口侧面观察区域及不预热和低预热焊缝金属冲击断口侧面的SEM像

Fig.9 Observation region of impact fracture side (a) and SEM images of impact fracture side of weld metals for non-preheating (b, d) and low preheating temperature (c, e)