Effect of aluminizing and austempering processes on structural, mechanical and wear properties of a SSF ductile iron

Yürektürk, Yakup; Baydoğan, Murat

doi:10.1088/2053-1591/aae804

Cited by 6 publications

(3 citation statements)

References 29 publications

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“…Considering the low temperature of the process, it is noteworthy that the as-machined X65 sample also revealed similar mechanical strength. The mechanical properties of the specimens are in good agreement with the previous literature data on X65 pipeline steel. − While the heat treatment conditions (temperature and time) are the major factors altering the mechanical properties of aluminized steel, previous studies showed that it is required to keep the thickness of the aluminized surface layer to a minimum value because of the brittle nature of aluminide layer and the presence of pores . The surface layer failure results in the formation of cracks below the yield point of untreated steel, which lowers the strength of aluminized steel significantly.…”

Section: Resultsmentioning

confidence: 99%

“…[39][40][41] While the heat treatment conditions (temperature and time) is the major factor altering the mechanical properties of aluminized steel, previous studies showed that it is required to keep the thickness of the aluminized surface layer to a minimum value because of the brittle nature of aluminide layer and presence of pores. 42 The surface layer failure results in the formation of cracks below the yield point of untreated steel, which lowers the strength of aluminized steel significantly. In this study, the thickness of the aluminized layer was about 10 μm, which did not reduce the mechanical strength of the specimen.…”

Section: High-temperature Fouling Testmentioning

confidence: 99%

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Low-Temperature Pack Aluminization Process on Pipeline Steel To Inhibit Asphaltene Deposition

Shetty

Daryadel

Haire

et al. 2019

ACS Appl. Mater. Interfaces

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Asphaltene deposition in petroleum refineries is known to be problematic as it reduces efficiency and may lead to structural failure or production downtime. Though several successful approaches have been utilized to limit deposition through the addition of dispersants and inhibitors to petroleum, these methods require constant intervention and are often expensive. In this study, we demonstrate an innovative technique to engineer the surface chemistry of pipeline alloy steels to inhibit asphaltene deposition. Pack aluminization, a standard industrial-scale chemical vapor deposition process, is employed at a low temperature of 600 o C to aluminize API 5L X65 high strength pipe steel substrates. The results showed deposit free steel surfaces after high-pressure and high-temperature fouling experiments. The improvement is attributed to the formation of an aluminide intermetallic phase of Fe 2 Al 5 , which changes the native oxide chemistry to favor alumina over hematite. The continuous passivating oxide scale, acting as a protective barrier,

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Section: Resultsmentioning

confidence: 99%

Section: High-temperature Fouling Testmentioning

confidence: 99%

Low-Temperature Pack Aluminization Process on Pipeline Steel To Inhibit Asphaltene Deposition

Shetty

Daryadel

Haire

et al. 2019

ACS Appl. Mater. Interfaces

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“…Они обладают такими свойствами, как высокая жаростойкость даже при 1000 °С и коррозионная устойчивость в окислительных и восстановительных средах из-за более высокого содержания алюминия, чем в сталях и жаропрочных сплавах [8]. Fe-Al покрытия могут служить для придания твердости, износостойкости и коррозионной стойкости поверхности стальных изделий [9]. Алюминиды железа соответствуют большинству сталей по характеристикам теплового расширения и поэтому покрытия на их основе характеризуются высокой адгезией [10].…”

Section: Introductionunclassified

Electrospark deposition of metalloceramic Fe–Al/HfC coating on steel 1035

Бурков

Kulik

2023

Izv. vysš. učebn. zaved., Čern. metall.

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To improve the tribotechnical behavior and heat resistance of steel 1035, composite metalloceramic Fe–Al/HfC coatings were prepared by electrospark deposition. A non-localized anode was used as an electrode consisting of a mixture of iron and aluminum granules with a molar ratio of 3:2 and with the addition of HfC powder. The cathode gain had positive values indicating that HfC powder can be deposited on steel 1035 using the Fe60Al40 anode mixture. Moreover, the cathode gain monotonically increased with the increase in addition of HfC powder to the anode mixture. The coatings structure is represented by a matrix of FeAl intermetallic compound reinforced with HfC grains, which corresponds to the structure of a metalloceramic composite. Concentration of HfC in the coating increased with the addition of HfC powder to the anode mixture. Deposition of Fe–Al/HfC coatings according to the proposed technique allows reducing the friction coefficient of steel 1035 from 6 to 40 vol. %. Depending on the concentration of HfC in the anode mixture, the wear resistance of Fe–Al/HfC coatings varied nonmonotonically with a maximum at 8 vol. %. The use of Fe–Al/HfC coatings makes it possible to increase the wear resistance of the steel surface to 10 times. Comparison of the final weight gain of the samples after 100 h of oxidation resistance tests at a temperature of 700 °C allows us to conclude that electrospark deposition Fe–Al/HfC coatings can increase the oxidation resistance of steel 1035 by 1.7–2.2 times. Analysis of the study results shows that adhesion of Fe–Al composition to HfC is weak. This was reflected in decrease in hardness, wear resistance and oxidation resistance of coatings with an increase in the concentration of HfC in the anode mixture above 8 vol. %.

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SEM/EDS Investigation of Aluminized Deformable Austempered Ductile Iron with Al and AlCr Particle Slurries Before and After High-Temperature Oxidation

Tsurtsumia,

Nadaraia,

Kutelia

et al. 2024

J. of Materi Eng and Perform

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Effect of aluminizing and austempering processes on structural, mechanical and wear properties of a SSF ductile iron

Cited by 6 publications

References 29 publications

Low-Temperature Pack Aluminization Process on Pipeline Steel To Inhibit Asphaltene Deposition

Low-Temperature Pack Aluminization Process on Pipeline Steel To Inhibit Asphaltene Deposition

Electrospark deposition of metalloceramic Fe–Al/HfC coating on steel 1035

SEM/EDS Investigation of Aluminized Deformable Austempered Ductile Iron with Al and AlCr Particle Slurries Before and After High-Temperature Oxidation

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