Structural modification in a re-heated bead-overlapping zone of the multiple-pass plasma-transferred arc Fe-Cr-V-Mo-C coating

Abstract

The structural evolution of the overlapping bead zone of Fe-Cr-V-Mo-C plasma-transferred arc (PTA) multiple-pass coating has been investigated. The overlapping bead 2–2.5 mm width zone experienced high-temperature re-heating from a successive bead deposition, which resulted in its structural evolution as compared to that of the previously deposited metal. At least three microstructurally different regions have been found inside the re-heated zone as follows: high-tempered region, eutectic carbide recrystallization region and incomplete melting region. These three structurally different regions were characterized by different microhardness and wear resistance levels. Basing upon the results of microstructural characterization, we offer schematics of the coating formation during deposition as well as discuss the role of microstructure in wear.

Original language	English
Pages (from-to)	272-280
Number of pages	9
Journal	Surface and Coatings Technology
Volume	329
DOIs	https://doi.org/10.1016/j.surfcoat.2017.09.054
Publication status	Published - 25 Nov 2017

Keywords

Hardfacing
Microhardness
Microstructure
Plasma-transferred arc deposition
Wear

ASJC Scopus subject areas

Chemistry(all)
Condensed Matter Physics
Surfaces and Interfaces
Surfaces, Coatings and Films
Materials Chemistry

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10.1016/j.surfcoat.2017.09.054

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Degterev, A. S., Gnyusov, S. F., & Tarasov, S. Y. (2017). Structural modification in a re-heated bead-overlapping zone of the multiple-pass plasma-transferred arc Fe-Cr-V-Mo-C coating. Surface and Coatings Technology, 329, 272-280. https://doi.org/10.1016/j.surfcoat.2017.09.054

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keywords = "Hardfacing, Microhardness, Microstructure, Plasma-transferred arc deposition, Wear",

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AU - Tarasov, S. Yu

PY - 2017/11/25

Y1 - 2017/11/25

N2 - The structural evolution of the overlapping bead zone of Fe-Cr-V-Mo-C plasma-transferred arc (PTA) multiple-pass coating has been investigated. The overlapping bead 2–2.5 mm width zone experienced high-temperature re-heating from a successive bead deposition, which resulted in its structural evolution as compared to that of the previously deposited metal. At least three microstructurally different regions have been found inside the re-heated zone as follows: high-tempered region, eutectic carbide recrystallization region and incomplete melting region. These three structurally different regions were characterized by different microhardness and wear resistance levels. Basing upon the results of microstructural characterization, we offer schematics of the coating formation during deposition as well as discuss the role of microstructure in wear.

AB - The structural evolution of the overlapping bead zone of Fe-Cr-V-Mo-C plasma-transferred arc (PTA) multiple-pass coating has been investigated. The overlapping bead 2–2.5 mm width zone experienced high-temperature re-heating from a successive bead deposition, which resulted in its structural evolution as compared to that of the previously deposited metal. At least three microstructurally different regions have been found inside the re-heated zone as follows: high-tempered region, eutectic carbide recrystallization region and incomplete melting region. These three structurally different regions were characterized by different microhardness and wear resistance levels. Basing upon the results of microstructural characterization, we offer schematics of the coating formation during deposition as well as discuss the role of microstructure in wear.

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