Synthesis of boride coatings on steel using plasma transferred arc (PTA) process and its wear performance

Iakovou, R; Bourithis, L.; Papadimitriou, G.

doi:10.1016/s0043-1648(02)00056-x

Cited by 54 publications

(29 citation statements)

References 21 publications

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“…It is possible that these parts of the alloyed layer consist of Fe 2 B and NbB 2 phases which were detected by XRD analysis. Deniz [24] and Iakovou et al [10] studied on boron addition to the steel surface for surface alloying and they explained that the borides formed in the alloyed layer realized close up the grain boundaries. Figure 2 (a) shows the variation of friction coefficients as a function of applied load with different alloyed layers against alumina ball at the sliding speed of 0.1 m/s for 200m sliding distance.…”

Section: Resultsmentioning

confidence: 99%

Wear behavior of the surface alloyed AISI 1020 steel with Fe-Nb-B by TIG welding technique

Kılınç

Durmaz

Abakay

et al. 2015

AIP Conference Proceedings

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Abstract.Weld overlay coatings also known as hardfacing is a method which involves melting of the alloys and solidification for applied coatings. Recently hardfacing by welding has become a commonly used technique for improvement of material performance in extreme (high temperature, impact/abrasion, erosion, etc.) conditions.In the present study, the coatings were produced from a mixture of ferrous niobium, ferrous boron and iron powders in the ranges of -45 μm particle size with different ratio.

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Section: Resultsmentioning

confidence: 99%

Wear behavior of the surface alloyed AISI 1020 steel with Fe-Nb-B by TIG welding technique

Kılınç

Durmaz

Abakay

et al. 2015

AIP Conference Proceedings

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“…1, borides formed in the in situ composite structure found in the alloyed layer include primary borides and eutectic colonies between borides. Deniz et al [8] and Iakovou et al [7] studied on boron addition to the steel surface for surface alloying and they explained that the borides formed in the alloyed layer realized close up the grain boundaries. The hardness of the boride phases, eutectic colonies took place in the alloyed layer; transition zone and base metal are 1689 ± 85 HV 0.01 , 867 ± 76 HV 0.01 , 387 ± 42 HV 0.1 , and 181 ± 7 HV 0.1 , respectively.…”

Section: Resultsmentioning

confidence: 99%

“…In the PTA process, the heat of the plasma (arc of ionised gas) is used to melt the surface of the substrate and the welding powder, where the molten weld pool is protected from the atmosphere by the shielding gas [19]. While there is a great deal of study about surface hardening processes of boron containing (656) steel and alloys [7,8,11], there is not any study about the Fe Nb B alloys used for surface alloying treatments.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Fe-Nb-B Base Hardfacing of Steel

Kılınç

Çeğil²,

Abakay

et al. 2014

Acta Phys. Pol. A

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Recently hardfacing by welding has become a commonly used technique for improvement of material performance in extreme (high temperature, impact/abrasion, erosion, etc.) conditions. In the present study, three di erent alloy compositions of the Fe Nb B were used for hardfacing of the AISI 1020 steel by tungsten inert gas welding process and analyzed. The coatings were produced from a mixture of ferrous niobium, ferrous boron and iron powders in the range of −45 µm particle size with di erent ratio. The coatings' thickness was set to 2 3 mm on the substrate. Microstructure, phase analysis and hardness of the manufactured hardfacing alloys were characterized. Deposition results indicate good quality thick coating and porosity free of the hardfacings. X-ray di raction analyses showed that the alloyed layers include iron borides, FeNbB and iron phases. It was shown that surface alloyed layer has composite structure including steel matrix and well distributed boride phases.

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“…From both economic and technological points, producing a coating which has a high-performance wear-resistant on the surface of tribological components with appropriate surface engineering technology is one of the most efficient approaches to enhance the tribological performance for many moving mechanical components. Between the widely used surface engineering technologies, laser cladding, plasma transferred arc (PTA) weldsurfacing, flame spray and plasma spray can fabricate a relative thicker coating [3][4][5][6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Shielding Gas Composition on Microstructure and Abrasive Wear Resistance Fabricated with PTA Alloying Technique

Çay¹,

Ozan²,

Gök³

et al. 2013

Archives of Metallurgy and Materials

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In this study, SAE 1020 steel surfaces were separately alloyed with preplaced high-carbon-ferro-chromium (FeCr), ferro-molybdenum (FeMo) and ferro-titanium (FeTi) powders by using plasma transferred arc (PTA) heat source. By using three different types of shielding gas compositions during the alloying process, the study investigated the effects of modified shielding gas composition on the microstructure, hardness, and abrasive wear resistance of specimens. The most homogenous microstructure and the highest wear resistance was obtained in the gaseous environment which included 3% of H 2 . Increasing this rate to 5 % in the shielding gaseous composition caused gaps and pores in the microstructure and caused a decrease in the wear resistance. The x-ray examinations of the specimens identified ferro-molybdenum and ferro-titanium solid solutions, ferrit, austenite and martensite phases in their microstructure as the first phase and FeC, Cr 7 C 3 , Cr 3 C 2 , Fe 3 C, Fe 7 C 3 , MoC and TiC phases as the second phase. As a result, it was concluded that changes in shielding gas composition in surface alloying process affected specimens' microstructure and abrasive wear properties.Keywords: Surface modification, shielding gas, PTA, alloying, microstructurePowierzchnie stalowe SAE 1020 były oddzielnie stopowane z wcześniej nałożonymi proszkami wysokowęglowego żelazo-chromu (FeCr), żelazo-molibdenu (FeMo) i żelazo-tytanu (FeTi) za pomocą techniki PTA. Dzięki zastosowaniu trzech różnych typów gazu osłonowego w trakcie procesu wytwarzania stopu, badano wpływ modyfikacji składu gazu osłonowego na mikrostrukturę, twardość i odporność na ścieranie próbek. Najbardziej jednorodną mikrostrukturę i najwyższą odporność na ścieranie otrzymuje się w środowisku gazowym, które zawiera 3% H 2 . Zwiększenie zawartości H 2 do 5% w składzie gazu osłonowego spowodowało powstanie luk i porów w mikrostrukturze oraz spadek odporności na ścieranie. Badania dyfrakcji rentgenowskiej próbek pozwoliły zidentyfikować roztwory stałe żelazo-molibdenu i żelazo-tytanu, ferryt, austenit i martenzyt jako pierwszą fazę w ich mikrostrukturze, oraz FeC, Cr 7 C 3 , Cr 3 C 2 , Fe 3 C, Fe 7 C 3 , MoC i TiC jako drugą fazę. W związku z tym stwierdzono, że zmiany w składu gazu osłonowego w procesie stopowania wpłynęły na mikrostrukturę próbek i właściwości ścierne.

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Synthesis of boride coatings on steel using plasma transferred arc (PTA) process and its wear performance

Cited by 54 publications

References 21 publications

Wear behavior of the surface alloyed AISI 1020 steel with Fe-Nb-B by TIG welding technique

Wear behavior of the surface alloyed AISI 1020 steel with Fe-Nb-B by TIG welding technique

Characterization of Fe-Nb-B Base Hardfacing of Steel

The Effect of Shielding Gas Composition on Microstructure and Abrasive Wear Resistance Fabricated with PTA Alloying Technique

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