Corrosion behavior and characterization of plasma nitrided and borided AISI M2 steel

Güneş, İbrahim; Erdoğan, Matem; Çelik, Atila Gurdhan

doi:10.1590/s1516-14392014005000061

Cited by 24 publications

(12 citation statements)

References 19 publications

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“…The boride layers mainly consist of intermetallic phases (FeB, Fe 2 B and CrB) as a result of diffusion of boron atoms from the boriding compound to the metallic lattice with respect to the holding time. The properties of these boride layers are known to a large extent by the help of these phases [21][22][23][24]. Micro-hardness measurements were done from the surface to the interior along a line to see variation of hardness of the boride layer, transition zone and matrix, respectively in Figure 3.…”

Section: Resultsmentioning

confidence: 99%

Corrosion Behavior and Microstructure of Borided Tool Steel

Erdoğan

Güneş

2015

Matéria (Rio J.)

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In the present study, the corrosion behaviors of borides formed on cold work tool steel have been investigated in a 4% M HCl acid solution. Boriding was performed in a solid medium consisting of Ekabor-II powders at 850 and 950°C for 6 h. The boride layer was characterized by SEM, EDS, XRD and the hardness tester. XRD analysis of boride layers on the surface of the samples revealed the existence of FeB, Fe2B, CrB, Cr2B and MoB compounds. Depending on the chemical composition of substrates and boriding time, the boride layer thickness on the surface of the steel ranged from 13.14 μm and 120.82 μm. The hardness of the boride compounds formed on the surface of the samples ranged from 1806 to 2342 HV0,05, whereas Vickers hardness values of the untreated the samples was 428 HV0,05. The corrosion resistance of the borided steels was higher compared with that of the unborided steels. The borided steels increased the corrosion resistances of the steels 8-17-fold.

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Section: Resultsmentioning

confidence: 99%

Corrosion Behavior and Microstructure of Borided Tool Steel

Erdoğan

Güneş

2015

Matéria (Rio J.)

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“…Ther mal diffusion treatments of boron compounds used to form iron borides typically require process tempera tures of 973 and 1323 K for 1to 12 hours. The process can be carried out in solid powder (boronizing com pound), liquid, gaseous, electrochemical or plasma medium [5][6][7][8]. In this technique the boriding (pack) agent in powder form is placed into a heat resistant stainless steel box and samples are embedded into this powder under inert gas atmosphere.…”

Section: Introductionmentioning

confidence: 99%

Diffusion kinetics and characterization of borided AISI D6 steel

Güneş

Kanat

2015

Prot Met Phys Chem Surf

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In this study, the case properties and diffusion kinetics of AISI D6 steel borided in Ekabor II pow der were investigated by conducting a series of experiments at temperatures of 1123, 1223 and 1323 K for 2, 4 and 8 h. The boride layer was characterized by optical microscopy, X ray diffraction technique and micro Vickers hardness tester. X ray diffraction analysis of boride layers on the surface of the steels revealed the existence of FeB, Fe 2 B, CrB and Cr 2 B compounds. Depending on the chemical composition of substrates and boriding time, the boride layer thickness on the surface of the steel ranged from 13.54 µm and 164.42 µm. The hardness of the boride compounds formed on the surface of the steels ranged from 1672 to 2118 HV 0.05 , whereas Vickers hardness values of the untreated the steels was 584 HV 0.05 . The activation energies (Q) of the borided steel were 180.359 kJ/mol. The growth kinetics of the boride layers forming on the AISI D6 steel and the thickness of boride layers were also investigated.

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“…It is widely reported that ASS‘s have a poor localized pitting corrosion-resistant ability in a chloride ion-rich environment, the destructive surface of ASS‘s with numerous pits or dimples is a marked characteristic of pitting corrosion [ 10 , 46 , 47 ]. Plasma nitriding treatment, which is one of the most extensively used surface treatment technologies that are available for steels and ASS‘s to obtain improved wear and/or corrosion resistance and fatigue strength, has been under development for several decades [ 14 , 48 , 49 , 50 , 51 ]. In light of the background above, we firstly obtained a groove-like surface texture on 316 by electrochemical processing in a 15 wt % solution of sodium chloride, and the surface-textured 316 was then treated with plasma nitriding.…”

Section: Introductionmentioning

confidence: 99%

Surface Texturing-Plasma Nitriding Duplex Treatment for Improving Tribological Performance of AISI 316 Stainless Steel

et al. 2016

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Surface texturing-plasma nitriding duplex treatment was conducted on AISI 316 stainless steel to improve its tribological performance. Tribological behaviors of ground 316 substrates, plasma-nitrided 316 (PN-316), surface-textured 316 (ST-316), and duplex-treated 316 (DT-316) in air and under grease lubrication were investigated using a pin-on-disc rotary tribometer against counterparts of high carbon chromium bearing steel GCr15 and silicon nitride Si3N4 balls. The variations in friction coefficient, mass loss, and worn trace morphology of the tested samples were systemically investigated and analyzed. The results showed that a textured surface was formed on 316 after electrochemical processing in a 15 wt % NaCl solution. Grooves and dimples were found on the textured surface. As plasma nitriding was conducted on a 316 substrate and ST-316, continuous and uniform nitriding layers were successfully fabricated on the surfaces of the 316 substrate and ST-316. Both of the obtained nitriding layers presented thickness values of more than 30 μm. The nitriding layers were composed of iron nitrides and chromium nitride. The 316 substrate and ST-316 received improved surface hardness after plasma nitriding. When the tribological tests were carried out under dry sliding and grease lubrication conditions, the tested samples showed different tribological behaviors. As expected, the DT-316 samples revealed the most promising tribological properties, reflected by the lowest mass loss and worn morphologies. The DT-316 received the slightest damage, and its excellent tribological performance was attributed to the following aspects: firstly, the nitriding layer had high surface hardness; secondly, the surface texture was able to capture wear debris, store up grease, and then provide continuous lubrication.

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Corrosion behavior and characterization of plasma nitrided and borided AISI M2 steel

Cited by 24 publications

References 19 publications

Corrosion Behavior and Microstructure of Borided Tool Steel

Corrosion Behavior and Microstructure of Borided Tool Steel

Diffusion kinetics and characterization of borided AISI D6 steel

Surface Texturing-Plasma Nitriding Duplex Treatment for Improving Tribological Performance of AISI 316 Stainless Steel

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