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http://dx.doi.org/10.4150/KPMI.2019.26.3.214

Microstructure and Characterization of Overlay Welding Layer using Fe-based Composite Powders  

Min, Hong (Division of Advanced Materials Engineering, Kongju National University)
Lee, Jong-Jae (Hankook Coatings)
Lee, Jin Kyu (Division of Advanced Materials Engineering, Kongju National University)
Publication Information
Journal of Powder Materials / v.26, no.3, 2019 , pp. 214-219 More about this Journal
Abstract
In this study, the microstructure and characterization of an overlay welding layer using Fe-based composite powders are reported. The effects of the number of passes and composition of powders on the microstructure and mechanical properties are investigated in detail. The welding wire and powders are deposited twice on a stainless-steel rod using a laser overlay welding process. The microstructure and structural characterization are performed by scanning electron microscopy and X-ray diffraction. The mechanical properties of the first and second overlay layers are analyzed through the micro-Vickers-hardness tester and abrasion wear tester. In the second overlay layer, the hardness and specific wear are approximately 840 Hv and $2.0{\times}10^{-5}mm^3/Nm$, respectively. It is suggested that the increase of the volume fractions of $(Cr,Fe)_7C_3$ and NbC phases in the second welding layer enhances the hardness and wear resistance.
Keywords
Overlay; Composite powder; Fe-based; Welding;
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1 S. Y. Hwang and E. R. Baek: Journal of KWJS, 20 (2002) 70.
2 N. H. Kang and Y. G. Yoo: Journal of KWJS, 25 (2007) 7.
3 S. H. Choo, C. K. Kim, K. J. Euh, S. H. Lee. J. Y. Jung and S. H. Ahn: Korean J. Met. Mater., 38 (2000) 1175.
4 J. C. Kim and K. C. Park: Journal of KWJS, 20 (2002) 54.
5 Y. R. Kim, H. B. Chae and J. W. Kim: Journal of KWJS, 31 (2013) 62.
6 N. Kang: Journal of KWJS, 28 (2010) 10.
7 H. C. Yoo: Journal of KWJS, 31 (2013) 17.
8 E. R. Baek, J. Y. Jung and S. H. Ahn: Journal of KWJS, 15 (1997) 11.
9 H. Lee, S. H. Choo, E. R. Baek, S. H. Ahn and N. J. Kim: Korean J. Met. Mater., 33 (1995) 895.
10 J. C. Kim, K. C. Park and C. O. Choi: Journal of KWJS, 19 (2001) 58.
11 H. S. Jeong, Y. Y. Lee and D. S. Bae: Journal of KWJS, 30 (2012) 57.
12 H. B. Kim and C. H. Lee: Journal of KWJS, 15 (1997) 78.