| MATERIALS AND SUSTAINABLE DEVELOPMENT:GREEN MANUFACTURING AND PROCESSING OF MATERIALS |
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| Effect of Oxygen Content and Inclusions on Impact Toughness in Deposited Weld Metal of High Strength Steel Metal Cored Wire E120C-K4 |
| SU Xiaohu1, LI Zhuoxin1, MA Siming1, LI Hong1, ZHANG Tianli2, KIM Hee Jin3
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1 College of Materials Science and Engineering,Beijing University of Technology,Beijing 100124,China
2 School of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, China
3 Advanced Joining Research Team, Korea Institute of Industrial Technology, Cheonan-si 330-825, Korea |
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Abstract In this work, the effects of oxygen content and inclusions on the microstructure and impact toughness of the metal-cored wire E120C-K4 deposited metal were studied by changing the shielding gas ratio and Zr-Ti, Ti-B microalloying.The results showed that: with the increase of oxygen content in deposited metal of metal cored wire E120C-K4, grain size of microstructure of deposited metal increased, which is similar incontent of granular bainite as well as the size and content of inclusions ,impact toughness drastically deteriorated. Under the combined effect of Zr and Ti, the proportion of inclusions per unit area in the deposited metal decreased, the average particle size of inclusions fell into 0.4—0.7 μm range, providing a large number of potential nucleation spot for acicular ferrite(AF), so improving the impact absorbing energy of deposited metal.
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Published: 13 May 2020
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| Fund:This work was financially supported by the National Natural Science Foundation of China (51574011). |
About author:: Xiaohu Su received his M.S. degree in June 2019 from Beijing University of technology,mainly engaged in high-strength steel welding materials and metal weldability
Zhuoxin Li is a professor and doctoral tutor at the School of Materials Science, Beijing University of Technology. His main research fields are welding metallurgy and material optimization design and quality control based on statistical analysis, precision joining of light metals, nano thermal spraying and so on.He has published more than 235 papers in important journals and more than 49 invention patents. |
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2020, Vol. 34 
