| 气体保护焊烟尘形成机理分析 |
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| 引用本文： | 李慷,杨立军,刘晓秋,岳宜文,李桓.气体保护焊烟尘形成机理分析[J].焊接学报,2015,36(5):69-72. |
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| 作者姓名： | 李慷 杨立军 刘晓秋 岳宜文 李桓 |
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| 作者单位： | 天津大学 材料科学与工程学院, 天津 300072,天津大学 材料科学与工程学院, 天津 300072,中国医学科学院 放射医学研究所, 天津 300192,北洋国家精馏技术工程发展有限公司, 天津 300072,天津大学 材料科学与工程学院, 天津 300072 |
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| 基金项目： | 天津市应用基础及前沿技术研究计划项目(07JCYBJC-04400,11JCYBJC06100) |
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| 摘 要： | 以H08Mn2Si实芯焊丝的熔化极气体保护焊和SJ501药芯焊丝的CO2保护焊为对象,探讨了气体保护焊烟尘粒子的粒径分布特征和形成机理.采用准光弹性散射法测量烟尘粒径,并利用透射电镜(TEM)、能谱(EDS)对烟尘粒子的形貌、结构和化学成分进行了观察和分析.结果表明,两种工艺形成的烟尘一次粒子都呈球形,表面圆滑,直径一般小于200 nm,大多数烟尘粒子都是铁的氧化物.研究还发现,烟尘的二次粒子为链状或网状结构,由大量一次粒子聚结而成,与实芯焊丝的熔化极气体保护焊形成的烟尘相比,药芯焊丝CO2焊形成的烟尘化学成分更复杂,烟尘二次粒子更细小.
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| 关 键 词： | 气体保护焊 一次烟尘粒子 二次烟尘粒子 粒径分布 烟尘形貌 |
| 收稿时间： | 2013/1/26 0:00:00 |
Analysis on fume formation mechanism in gas shielded arc welding |
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| LI Kang,YANG Lijun,LIU Xiaoqu,YUE Yiwen and LI Huan.Analysis on fume formation mechanism in gas shielded arc welding[J].Transactions of The China Welding Institution,2015,36(5):69-72. |
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| Authors: | LI Kang YANG Lijun LIU Xiaoqu YUE Yiwen and LI Huan |
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| Affiliation: | School of Material Science and Engineering, Tianjin University, Tianjin 300072, China,School of Material Science and Engineering, Tianjin University, Tianjin 300072, China,Institute of Radiation Medicine, Chinese Academy of Medical Sciences, Tianjin 300192, China,Beiyang Engineering Cooperation of National Distillation Technology, Tianjin 300072, China and School of Material Science and Engineering, Tianjin University, Tianjin 300072, China |
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| Abstract: | This paper presents an investigation on the welding fume particle size distribution characteristics and its formation mechanism in two different welding techniques: GMAW with H08Mn2Si solid wire and CO2 shielded FCAW with SJ501 wire. The particle size distributions were measured by quasi-elastic laser scattering and the fume morphology and its chemical composition were examined by TEM and EDS. The experimental results showed that two types of primary particle were spherical shape with smooth surface, whose diameters were generally smaller than 200 nm. The particles were mostly iron oxides. It was also found that secondary fume particles were chain like or mesh like shape, which were agglomerated by a number of primary particles. Compared to the fume collected in GMAW, the chemical composition of FCAW fume was more complex and the secondary particles were smaller. |
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| Keywords: | GMAW primary particle secondary particle particle size distribution fume morphology |
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