焊接电流和药皮厚度对水下湿法焊接熔渣物相及微观组织的影响

发布时间：2018-06-07 19:56

本文选题：水下湿法焊接 + 熔渣　；参考：《焊接学报》2017年01期

【摘要】：文中采用自制的金红石型药皮焊条进行水下湿法焊接,重点分析了焊接电流和药皮厚度对熔渣物相及微观组织的影响.对熔渣的宏观形貌分析发现,当药皮厚度较薄时,焊后熔渣稀薄,覆盖不均匀,此外,焊接电流对焊接飞溅有重要影响,当焊接电流较大时,焊接过程中有大量飞溅产生.通过对熔渣的碱度系数及物相分析得出,熔渣的主要组成相为Fe Ti O3和Ca Ti O3,还有少量的Mn Ti O3,Fe F3和Ca-Si-O相,药皮厚度和焊接电流对熔渣的碱度系数和组成相影响均较小.熔渣的微观组织分析发现,减小药皮厚度和增大焊接电流,熔渣中生成大量的树枝状组织,熔渣微观组织的方向性增强,有利于脱渣.
[Abstract]:In this paper, a self-made rutile flux electrode is used for underwater wet welding. The effects of welding current and coating thickness on the phase and microstructure of molten slag are analyzed. It is found that the slag is thin and uneven after welding when the coating thickness is thin. In addition, the welding current has an important effect on the welding spatter. When the welding current is larger, a large number of spatters occur in the welding process. Through the analysis of basicity coefficient and phase of molten slag, it is found that the main phases of slag are FeTiO3 and CaTiO3, and there are a few mn TiO3FeF3 and Ca-Si-O phases. The thickness of coating and welding current have little effect on the basicity coefficient and phase composition of slag. The microstructure analysis of the molten slag shows that a large number of dendritic structure is formed in the slag by decreasing the thickness of the coating and increasing the welding current, and the directionality of the microstructure of the slag is enhanced, which is beneficial to the slag removal.
【作者单位】：山东省科学院海洋仪器仪表研究所山东省海洋环境监测技术重点实验室;
【基金】：国家自然科学基金资助项目(51305245,51505267) 山东省自然科学基金资助项目(ZR2014EEP016) 山东省科学院青年基金资助项目(2013QN043) 青岛市应用基础研究计划资助项目(15-9-1-53-JCH) 青岛市市南区科技发展资金资助项目(2015-6-029-ZH)
【分类号】：TG456.5

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