Correlation discussion between material properties and chemicalcomponents in high-strength steel welding joint by originalposition distribution analysis of laser ablation inductivelycoupled plasma mass spectrometry
HAN Mei,ZHANG Xi,HU Jing-yu
Central Iron & Steel Research Institute, Beijing 100081, China
Abstract：The change of distribution and existence form of alloying elements near fusion line could influence the property of fusion zone of welding material. A quantitative analysis method of Al, Ti, Cu, Mo, Ni and Mn in alloy steel by laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) was established. Then the established method was applied for the original position distribution analysis of sensitive elements in high-strength steel welding joint and its nearby base metal. The conclusion combined with physical and mechanical performance testing results was preliminarily used to explore the influence of elemental content distribution on the welding joint structure property. The results showed that the elemental content in welding joint zone was related to the dilution effect of base metal. The content change of hardenability element (Mn) in welding joint would result in the structure property change of welding joint. Moreover, it was inversely proportional to the variation of impact toughness.
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