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Effect of Titanium Content on Microstructure and Wear Resistance of Hardfacing Alloy

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Abstract

The hardfacing alloys with different concentrations of titanium were deposited on carbon steel substrates by shielded metal arc welding, and the effect of titanium content on the microstructure characteristics of the hardfacing alloys was investigated. The wear resistance test of the hardfacing alloys was carried out by using a slurry rubber wheel abrasion test machine, and the wear behaviour was also studied. The results indicate that the addition of titanium can effectively promote the precipitation of the complex carbides of Nb and Ti due to the prior precipitation of titanium carbide which acts as nucleation sites for complex carbides. With the increase of titanium content, the wear resistance of the hardfacing alloys is increased gradually resulting from the refinement of microstructure and dispersive distribution of fine carbide precipitates. And the wear mechanism is mainly minimum plastic deformation with interrupted grooves due to the strengthening and protecting effects of carbide precipitates.

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Correspondence to Ke Yang  (杨可).

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Funded by the National Natural Science Foundation of China (No.51101050), Fundamental Research Funds for the Central Universities, Natural Science Foundation of Jiangsu Province of China (No.BK20141156) and Program for Outstanding Innovative Talents in Hohai University

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Yang, K., Jiang, Y. & Bao, Y. Effect of Titanium Content on Microstructure and Wear Resistance of Hardfacing Alloy. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 33, 669–673 (2018). https://doi.org/10.1007/s11595-018-1876-y

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  • DOI: https://doi.org/10.1007/s11595-018-1876-y

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