DH36钢湿法焊条多层多道焊海试结果分析

发布时间：2018-03-26 05:02

本文选题：水下焊接　切入点：湿法焊条电弧焊　出处：《焊接学报》2017年04期

【摘要】：通过对潜水员焊工的培训,成功实现了不同接头形式的水下湿法手工多层多道焊,并且在渤海海域的11,22 m两个水深分别进行了对接接头平焊、搭接接头横焊及立焊和T形接头立焊及船形位置焊的焊接试验.结果表明,在两种水深的对接接头和搭接接头中都未发现夹渣、气孔及未熔合等缺陷,并且两种水深的对接接头和搭接接头在各项力学性能指标上都满足AWS D3.6 M:2010关于B级接头的要求.与11 m水深的焊缝相比,22 m水深的焊缝柱状晶区的针状铁素体减少,块状铁素体明显增多.两种水深接头的热影响区粗晶区组织差异不大,主要由板条状马氏体组成.
[Abstract]:Through the training of divers, the underwater wet multi-layer multi-pass welding with different joint forms was successfully realized, and the butt welding was carried out in two water depths of 1122 m in Bohai Sea, respectively. Welding tests of lap joint transverse welding and vertical welding and T-joint vertical welding and ship position welding. The results show that there are no defects such as slag inclusion, porosity and non-fusion in the butt joints and lap joints of two kinds of water depth. The mechanical properties of two kinds of water depth butt joints and lap joints meet the requirements of AWS D 3.6 M: 2010 for B grade joints. Compared with the weld with 11 m water depth, the acicular ferrite in the columnar crystal zone of the weld with water depth of 22 m is reduced. The structure of the heat affected zone of the two water depth joints is not different from that of the heat affected zone, and it is mainly composed of lath martensite.
【作者单位】：天津大学材料科学与工程学院;天津大学天津市现代连接技术重点实验室;海洋石油工程股份有限公司;
【分类号】：TG456.5

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