Structure and phase composition of the surface layer on steel after alitization

Голованов, А. В.; Radyuk, А. G.; Slavov, V.I.; Baranov, V. P.; Titlyanov, A. E.; Kul’mamet’eva, Yu. Z.

doi:10.1007/s11041-008-9039-y

Cited by 14 publications

(3 citation statements)

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“…Thus, the in-depth iron content, overall phase composition, and the cladding thickness depend on the process environment. The iron content and overall phase composition of the surface layer determine the hardness [2,3,19]. The literature data (Table 1) suggest that the phases with lower aluminium content (Fe 3 Al, FeAl 2 , and FeAl) are most probable ones since their formation enthalpies ΔH 298 are lower [17].…”

Section: Ultrasonic Impact Cladding Mechanismmentioning

confidence: 99%

Corrosion of 2024 alloy after ultrasonic impact cladding with iron

Vasylyev

Mordyuk

Sidorenko

et al. 2018

Surface Engineering

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The iron-containing layers were produced on the 2024 alloy surface using ultrasonic impact treatment (UIT) in the ambient air and argon environment. Multiple high-energy collisions of the pin of Armco-iron by the treated surface induce the iron cladding by means of solidstate welding of Fe dopants and Al substrate. SEM and EDX analysis and microhardness measurements showed a formation of oxide/intermetallic layers, which thickness ranges from 15-20 to 30-35 μm and hardness achieves ∼4 and ∼9 GPa after the argon-UIT and air-UIT processes, respectively. The polarisation tests in 3.5%NaCl medium showed that the layers are characterised by lower corrosion rates and more positive corrosion potentials than those of the original alloy owing to the formation of Al x -Fe y intermetallics. The noblest behaviour was registered for the air-UIT-processed 2024 alloy.

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Section: Ultrasonic Impact Cladding Mechanismmentioning

confidence: 99%

Corrosion of 2024 alloy after ultrasonic impact cladding with iron

Vasylyev

Mordyuk

Sidorenko

et al. 2018

Surface Engineering

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“…However, the easily fusible glass lubricants do not provide surface protection of metals during prolonged heating, which is typical for huge sheet slabs, as well as they debase conditions of engagement. Churlish and dual glass-enamel coatings must be deleted from the slab`s surface before it gets in the threading unit in order to avoid surface backfins, and the workpieces surfaces stays without protective thermal coating while operation of rolling, cooling and further heat treatment [4]. The protection from oxide scale formation, dealloying and decarburization is not yet fully provided.…”

Section: Introductionmentioning

confidence: 99%

The Calculation of the Thickness of Thermal Spray Coating for Protection of Low Alloyed Steel when Heated under Rolling

Gerasimova

Radyuk

Zarapin

2019

MSF

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In scientific work has been developed a thickness calculation procedure of an aluminum thermal spray coating, sprayed on the low-alloyed steel surfaces in order to provide its effective protection at hight temperatures. The method is based on the calculations of the diffusion layer thickness with consideration of temperature change on the blank`s surface and on the dependence of the parameter (directly proportional to the diffusional coefficient) on the temperature.

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“…Various attempts have been undertaken to solve it, one of which is to use, instead of structural lowcarbon steel, corrosion resistant materials, such as chromium and its alloys or stainless steel; however, this method significantly increases expenditures and is therefore economically disadvantageous [1]. Another more beneficial way is to use composite electrolytic chromium or aluminum coatings on the surface of current leads [2,3].…”

Section: Introductionmentioning

confidence: 99%

Electrolytic Aluminizing of Low Carbon Steel as Protection Treatment for Current Leads against High Temperature Oxidation

Ковров¹,

Tsvetov²,

Zaikov³

et al. 2016

MSF

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Application of protective aluminum-based coatings is one of the ways to increase the oxidation resistance of low-carbon steel. The electrolytic deposition of aluminum in the NaF33-KF15.2-(AlF3)51.8 wt.% melt at 920°C and the current density of 0.8-1.0 A·cm-2 (0.25 A·h·cm-2) have provided a continuous aluminide coating based on Fe2Al5 with a good adhesion to the steel substrate due to dissolution of oxide film from the surface of the treated products in fluoride melt. The resistance of steel samples to sulfide corrosion was investigated in a lab-scale three-electrode cell at 900°C in contact with a “Soderberg” carbon anode, which was obtained by carbonization of the coal tar pitch containing 2.0-2.5 wt.% of sulphur. The IRC (ohmic voltage drop in contact layer) growth rate was 3.3 times higher for uncoated steel due to formation of the oxide-sulfide layer based on FeS. The electrolytically aluminized steel with preliminarily formed α-Al2O3 layer possessed more stable value of the IRC in comparison with the uncoated steel because of the higher chemical resistance.

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Structure and phase composition of the surface layer on steel after alitization

Cited by 14 publications

References 0 publications

Corrosion of 2024 alloy after ultrasonic impact cladding with iron

Corrosion of 2024 alloy after ultrasonic impact cladding with iron

The Calculation of the Thickness of Thermal Spray Coating for Protection of Low Alloyed Steel when Heated under Rolling

Electrolytic Aluminizing of Low Carbon Steel as Protection Treatment for Current Leads against High Temperature Oxidation

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