The effect of carbon and boron addition on microstructure and hardness of iron– based hardfacing layer using flux-cored arc welding

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Tavakoli Shoushtari Mohammadreza; Goodarzi Massoud; SABET HAMED

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Journal: Journal of Science and Technology of Composites Year:2018 | Volume:5 | Issue:2 Page(s): 245-252

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Title

The effect of carbon and boron addition on microstructure and hardness of iron– based hardfacing layer using flux-cored arc welding

Author(s)

Tavakoli Shoushtari Mohammadreza | Goodarzi Massoud | SABET HAMED | Issue Writer Certificate

Keywords

Flux-cored arc weldingQ1

HardfacingQ2

Fe-BQ1

MicrostructureQ2

welding passesQ1

Abstract

In present investigation, hard claddings treatment was performed on st37 steel using two cored wires containing Fe-B and Fe-B-C powder-based by FCAW (Flux Cored Arc Welding) method during three stages of single pass, two-pass and three-pass welding process. Results indicated that the increasing of welding pass numbers for both welding wire, boron percentage was improved from 2. 3 to 3. 18 wt. % at weld metal due to more presence of boron in welding melt which caused volume increase of welding wire at each welding pass. Microstructure observation and phase analysis using optical and scanning electron microscopes and X-ray diffraction (XRD) results also expressed that the using of Fe-B electrode for single pass welding process caused to create a ferrite matrix and α-Fe2B eutectic; for two-pass welding process compared to single pass ferrite islands have been decreased, while the amount of α-Fe2B eutectic have been increased. Third pass of welding process caused to form α-Fe2B eutectic and primary particles of Fe2B which had columnar shape. Presence of carbon in Fe-B-C electrode will form pearlite islands beside primary Fe2B. Also, at third pass of welding process by both electrodes, very low amount of FeB phase would be formed around the Fe2B primary phase. Formation of FeB compound related to segregation of boron element during welding and non-equilibrium solidification. The increase in hardness can also be attributed to an increase in the amount of boron due to the increasing number of welding passes.

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APA: Copy

Tavakoli Shoushtari, Mohammadreza, Goodarzi, Massoud, & SABET, HAMED. (2018). The effect of carbon and boron addition on microstructure and hardness of iron– based hardfacing layer using flux-cored arc welding. JOURNAL OF SCIENCE AND TECHNOLOGY OF COMPOSITES (JSTC), 5(2 ), 245-252. SID. https://sid.ir/paper/251706/en

Vancouver: Copy

Tavakoli Shoushtari Mohammadreza, Goodarzi Massoud, SABET HAMED. The effect of carbon and boron addition on microstructure and hardness of iron– based hardfacing layer using flux-cored arc welding. JOURNAL OF SCIENCE AND TECHNOLOGY OF COMPOSITES (JSTC)[Internet]. 2018;5(2 ):245-252. Available from: https://sid.ir/paper/251706/en

IEEE: Copy

Mohammadreza Tavakoli Shoushtari, Massoud Goodarzi, and HAMED SABET, “The effect of carbon and boron addition on microstructure and hardness of iron– based hardfacing layer using flux-cored arc welding,” JOURNAL OF SCIENCE AND TECHNOLOGY OF COMPOSITES (JSTC), vol. 5, no. 2 , pp. 245–252, 2018, [Online]. Available: https://sid.ir/paper/251706/en

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