Materials Reports  2019, Vol. 33 Issue (Z2): 447-451 |
| METALS AND METAL MATRIX COMPOSITES |
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| Research of CMT Cladding Welding on Ductile Cast Iron with Carbon SteelWelding Wire of H08Mn2Si |
| WEN Junxia1,2, CAO Rui2, LI Junpeng1, ZENG Maoyan1, CHEN Jing1
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1 School of Mechanical and Electrical Engineering, Liuzhou Vocational & Technical College, Liuzhou 545005;
2 State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metal, Lanzhou University of Technology, Lanzhou 730050 |
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Abstract Ductile cast iron is a ferrous alloy characterized by carbon-rich phase in the form of spheroidal, and usually be cladding welded with dissimilar materials to obtain the good surface performance. Complex process is required when welding dissimilar materials, for there are obstacles will be introduced by the different physical and chemical properties of the two dissimilar materials when welding them together. The most effective way to solve this problem is to reduce the heat input in welding process as much as possible. In this study, the CMT welding has been carried out to study the cladding welding on nodular cast iron QT400 by a feeding material of H08Mn2Si which is commonly used in carbon steel welding. The related phase transformation and migration of different elements across the partially melted zone (PMZ) have been investigated. Scanning electron microscope (SEM) was used to determine the microstructure and phase composition of the cladding layer and interfaces. Micro-hardness of the samples was evaluated after CMT cladding welding. The results reveal that CMT welding can primely realize the cladding welding on nodular cast iron with the feeding wire of H08Mn2Si. In addition, the heat affected zone (HAZ) of the overlaying welding seam is relatively small, and the transition of the major chemical elements and microhardness across the interface is relatively smooth. This study will expand the application fields of CMT welding and promote the development of ductile cast iron.
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Published: 25 November 2019
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| Fund:This work was supported by Promotion Project of Basic Capacity of Young and Middle-aged Teachers in Guangxi Zhuang Autonomous Region (KY2016YB641),the National Nature Science Foundation of China(51675255). |
About author:: Junxia Wen received her M.S. degree in June 2011 from Lanzhou University of Technology. Currently she is one of faculity in Liuzhou Vocational & Technical College and a Ph.D student in Lanzhou University of Technology. Her research work focus on the weld ability of metal and the thermal fatigue properties of metal.
Rui Cao, doctor of engineering, professor, doctor supervisor in Lanzhou University of Technology. From July 2003 up to now, working at School of Materials Science and Engineering, Lanzhou University of Technology. Her research interests are weldability and corrosion behavior of dissimilar materials and new materials, strength and toughness of welded joints for high-strength steels, deformation, damage and fracture. More than 60 papers published in international authoritative journals and 100 papers published in Chinese. |
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