A New Type of Submerged-Arc Flux-Cored Wire Used for Hardfacing Continuous Casting Rolls |
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Authors: | YANG Ke ZHANG Zhi-xi HU Wang-qin BAO Ye-feng JIANG Yong-feng |
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Affiliation: | College of Mechanical and Electrical Engineering, Hohai University, Changzhou 213022, Jiangsu, China |
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Abstract: | It is expected that the welding hardfacing of continuous casting rolls has better welding performance and higher wear resistance. A new type of submerged-arc hardfacing flux-cored wire has been developed through nitrogen replacing part of carbon and addition of the nitrogen-fixing elements of niobium and titanium. And microstructure, degree of hardness and high-temperature wear resistance of its deposited metal samples were also investigated. It is found that the microstructure is martensite, residual austenite and carbonitride precipitates. As a result, the hardfacing metal with homogeneous distribution of very fine carbonitride particles had high hardness and excellent wear-resisting property during high-temperature wear, which could significantly extend the service life of continuous casting rolls. |
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Keywords: | submerged-arc flux-cored wire hardfacing high-temperature wear resistance continuous casting roll |
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