Effect of Annealing Time on Oxides Phases and Morphology along Oxidized Depth of Fe-3%Si Steel during Decarburization

Guo, Yue; Dai, Fangqin; Hu, Shoutian; Gao, Yang

doi:10.2355/isijinternational.isijint-2018-441

Cited by 5 publications

(3 citation statements)

References 22 publications

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“…The two zones that make up the oxide layer are clearly visible. In the literature, a complex structure of oxide layers is often reported, the thickness of which increases with the annealing time [ 22 , 23 , 24 ]. The molecules of oxygen are absorbed from the atmosphere, react with the iron and nucleated oxides.…”

Section: Resultsmentioning

confidence: 99%

Influence of Operating Temperature on the Service Life of Aluminum Extrusion Dies

Hubicki¹,

Richert

Łebkowski

2022

Materials

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The article investigates the effect of temperature and annealing time on the surface quality of WNLV nitrided steel used for the production of dies for extrusion of aluminum alloys. Eight annealing variants were tested, differing in the total annealing time at temperatures of 460 °C and 590 °C. The results show the effect of the annealing time on the width of the diffusion layer, which increased with the increasing length of the annealing time. The hardness decreased as the annealing time increased. It was found that annealing of the steel causes its oxidation. The oxide layer formed consisted of two layers, more specifically, an Fe2O3 oxide layer and a lower Fe3O4 oxide layer adhering to the steel surface. The surface of sections pressed on oxidized matrices was tested. The roughness of the surface of the oxide layers was also tested. The research revealed that an increase in the surface roughness of the oxides deposited on the matrices causes an increase in the roughness of the extruded sections. These results can potentially be used to improve the efficiency of the extrusion process and the quality of the extruded sections.

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Section: Resultsmentioning

confidence: 99%

Influence of Operating Temperature on the Service Life of Aluminum Extrusion Dies

Hubicki¹,

Richert

Łebkowski

2022

Materials

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“…Glass film formation under HTA is also a multi-stage process that includes several solid-phase reactions occurring in a wide range of temperatures [ 1 , 3 , 7 , 8 , 9 ]. The formation of GOES surface structure begins as oxidation during DA [ 3 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 ]. An ultrathin layer, mainly consisting of silicon oxide SiO 2 coated with (FeMn)SiO 3 /(FeMn) 2 SiO 4 shells, forms on the steel surface after DA [ 12 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

“…The formation of GOES surface structure begins as oxidation during DA [ 3 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 ]. An ultrathin layer, mainly consisting of silicon oxide SiO 2 coated with (FeMn)SiO 3 /(FeMn) 2 SiO 4 shells, forms on the steel surface after DA [ 12 , 13 ]. Behind it there is a Si-depleted region of the α-Fe solid solution.…”

Section: Introductionmentioning

confidence: 99%

Glass Film Formation on GOES Surface during High-Temperature Annealing: The Mechanism with Amorphous Phase Formation

et al. 2022

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Ceramic insulation coating (glass film) is an important constituent of grain-oriented electrical steel (GOES) designed for use in transformers. Within the scope of this study, the glass film was obtained by means of interaction between the surface of GOES containing 0.5 wt. % Cu and a heat-resistant MgO coating during annealing up to 1100 °C in the 75%H2 + 25%N2 atmosphere. The structure of glass film was analyzed using X-ray diffraction, glow-discharge optical emission spectroscopy, scanning probe microscopy, scanning electron microscopy, differential scanning calorimetry and thermodynamic calculations. After annealing, the glass film contained the following phases: crystalline (MgFe)2SiO4 and amorphous Fe-based solid solutions. The multi-stage mechanism of the glass film formation on GOES surface during high-temperature annealing was determined.

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Evolution of Si concentration profile for HiB steel during decarburization annealing: A kinetic Monte Carlo simulation

Zeng,

Guo,

Dai

et al. 2024

Acta Materialia

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Effect of Annealing Time on Oxides Phases and Morphology along Oxidized Depth of Fe-3%Si Steel during Decarburization

Cited by 5 publications

References 22 publications

Influence of Operating Temperature on the Service Life of Aluminum Extrusion Dies

Influence of Operating Temperature on the Service Life of Aluminum Extrusion Dies

Glass Film Formation on GOES Surface during High-Temperature Annealing: The Mechanism with Amorphous Phase Formation

Evolution of Si concentration profile for HiB steel during decarburization annealing: A kinetic Monte Carlo simulation

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