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7 不预热和低预热对接接头焊缝金属和熔合区中M-A组元SEM像

Fig.7 SEM images of M-A in non-preheating and low preheating temperature butt joints (a, b) weld metals, (c, d) fusion zones