Application of microbeam X-ray fluorescence spectrometry in original position quantitative statistic distribution analysis of hull steel welded joint component
WU Dongxiao1, WANG Peng*2,3, LI Dongling2,3, CHEN Ming3, ZHAO Jinbin4, FAN Xiaofen3
1. Central Iron and Steel Research Institute Co.,Ltd.,Beijing 100081,China; 2. Beijing Key Laboratory of Metallic Materials Characterization,Beijing 100081, China; 3. NCS Testing Technology Co.,Ltd.,Beijing 100081,China; 4. Nanjing Iron and Steel Co.,Ltd.,Nanjing 210035,China
Abstract：The chemical composition of welded joint of hull steel directly affects the microstructure distribution and the overall performance of the hull steel. The study on regional composition distribution of the welded joint has guiding significance for modifying the process parameters and improving the welding performance. A method for original position quantitative statistic distribution analysis of regional components of welded joints was established based on microbeam X-ray fluorescence spectrometry(μ-XRF). The distribution of seven elements in welded joints, including Cr, Cu, Mn, Mo, Nb, Ni, and Ti, was characterized by non-destructive and original position analysis. The distribution law of each element from the welding consumable area to the base metal area was explored, and the influence of different welding processes on the composition of the welded joint was found. There was segregation of Mn,Mo and Ni in sample welding consumable area under high energy welding, and the distribution trend was reversed. Under the conventional multi-pass welding process, the distribution of the underlying welding consumable components in the welding area was uneven, and there were obvious segregation bands for Mn, Cr and Ni in base metal area. The proposed method was of great significance for the fine investigation and evaluation of the quality of the welding area, and the analysis of the correlation between the composition, microstructure and properties of the welding area.
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