散货轮甲板角焊缝失效原因分析  

Analysis on Cracking in Fillet Weld of Bulk Carrier Deck

作　　者：杨喜昌 喻军 陶然 宋彩虹 姚佳人 YANG Xi-chang;YU Jun;TAO Ran;SONG Cai-hong;YAO Jia-ren(Shanghai Waigaoqiao Shipbuilding Co.,Ltd.,Shanghai 200137,China;Shanghai Key Laboratoryof Engineering Materials Application and Evaluation,Shanghai Research Institute of MaterialsCo.,Ltd.,Shanghai 200437,China)

机构地区：[1]上海外高桥造船有限公司,上海200137 [2]上海材料研究所有限公司上海市工程材料应用与评价重点实验室,上海200437

出　　处：《机械工程与自动化》2024年第2期171-173,共3页Mechanical Engineering & Automation

摘　　要：利用无损探伤、光学显微镜、扫描电镜和EDS能谱仪等检测仪器,分析了开裂的甲板角焊缝的宏观形貌、显微组织、断口形貌及化学成分。分析结果显示:甲板角焊缝裂纹断面无金属光泽,伴随有高温氧化色,且内部有较多夹渣;在裂纹断面发现大量淤泥状液态薄膜,液态薄膜中富集低熔点的硫化物。因此该裂纹属于典型的热裂纹。焊接工艺实施不当,是导致该角焊缝产生裂纹的主要原因。The macro and micro structure,fracture morphology and chemical composition of the cracked deck fillet weld were analyzed by means of non-destructive testing,optical microscope,scanning electron microscope and EDS energy spectrometer.Results showed that the crack section of deck fillet weld has no metal lust-er,accompanied by high temperature oxidation color,and there are more slag inclusions inside;a large num-ber of muddy liquid films are found on the crack section,and low melting point sulfides are enriched in it.Therefore,it is a typical hot crack.Improper implementation of the welding process is the main reason for the cracks in the fillet weld.

关 键 词：角焊缝 热裂纹 失效原因 焊接工艺 

分 类 号：TG441.7[金属学及工艺—焊接]