The effect of alloy elements on selective oxidation and galvanizability of TRIP‐aided steel

Liu, Huachu; Wen, Shu Wen; He, Yanlin

doi:10.1002/sia.3368

Cited by 10 publications

(5 citation statements)

References 19 publications

(12 reference statements)

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“…The Si was not measured in the Fe (ferrite, body centered cubic) matrix because Si diffused from the iron matrix into silicon oxides under the oxidizing condition during decarburization annealing as shown in Fig. 3(d) and (g) 23, 24. Therefore, the majority of Si in the oxide layers was present as silica.…”

Section: Resultsmentioning

confidence: 99%

Rapid quantitative analysis of fayalite and silica formed during decarburization of electrical steel

Jung

Park

Han

et al. 2011

Surface & Interface Analysis

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Subscales on surfaces are affected by the temperature and oxidation potential during decarburization annealing of electrical steel containing 3 wt% silicon. Knowledge of the structural and chemical properties of the surface oxide layer subscales permits the control of high-temperature oxidation processes in the electrical steel. In the present work, the oxide layers were characterized by transmission electron microscopy (TEM), Fourier transform infrared (FTIR) spectrometry, and glow discharge optical emission spectrometry (GD-OES). The main oxide compounds formed within the subscales during decarburization annealing of the electrical steel were fayalite (Fe 2 SiO 4 ) and silica (SiO 2 ). The fayalite and silica contents were quantitatively determined by wet analysis via the galvanostatic electrolysis method, and these oxide content measurements were compared with the fayalite content determined by FTIR spectrometry and the silica determined by GD-OES. The results determined by rapid methods and wet analysis showed good agreement. The present findings show that FTIR spectrometry and GD-OES measurements may be used for the rapid quantitative analysis of fayalite and silica in surface oxide layers during the manufacture of electrical steel.

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Section: Resultsmentioning

confidence: 99%

Rapid quantitative analysis of fayalite and silica formed during decarburization of electrical steel

Jung

Park

Han

et al. 2011

Surface & Interface Analysis

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“…36 Similarly, Liu also proposed an Al/Mn ratio to predict the oxides to form on the surface of Mn-Al-Si steel. 28 These rules are termed the Mn-Si rule and the Al-Mn rule, respectively.…”

Section: Precipitation Of Mixed Oxidesmentioning

confidence: 99%

Thermodynamic consideration on selective surface oxidation of high strength steels prior to hot-dip galvanizing

Liu

Shi

et al. 2011

J Coat Technol Res

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The galvanizability of high strength steel is dependent on the surface selective oxidation of alloy elements during intercritical annealing. First, this study reviewed the selective oxidation of Mn, Si, Al, Cr, and their possible products. Then we applied three sets of elemental activity data, i.e., calculated from ThermoCalc, molar fraction, and a M (M = Mn, Si, Al, Cr) = 1 to calculate the equilibrium oxygen partial pressure of each oxidation reaction. It was found that there is a significant deviation among the results calculated from different data. Finally, this study established the stabilities and precipitation sequences of Mn-Si, Mn-Al and Mn-Cr mixed oxides, and proposed a new Mn-Cr rule to predict the oxides formed on the surface of Mn-Cr steel.

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“…Mn, Cr, and Si alloying elements are added in the DP steel to improve mechanic property. The AHSS have to be hot‐dip galvanized prior to application in order to further improve the corrosion resistance 8,9 . Because the affinity between these alloying elements and oxygen is greater than that of Fe, the selective oxidation of the alloying elements manganese, chromium, silicon, and/or aluminum during recrystallization annealing period occurs and metal oxides on the surface of the steel are formed 10–17 .…”

Section: Introductionmentioning

confidence: 99%

Experimental study and thermodynamic analysis on the selective oxidation of DP1180 dual‐phase steel

Wang

Ding

et al. 2021

Surface & Interface Analysis

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The selective oxidation process of dual‐phase 1180 steel was investigated in this study. Annealing was carried out in Cr/Cr2O3 Rhines pack at 820°C for 60, 120, and 240 s, under the oxygen partial pressures of 10−23, 10−25, and 10−29 atm, respectively. Field emission scanning electron microscopy (FE‐SEM), electron backscattered diffraction (EBSD), and X‐ray photoelectron spectroscopy (XPS) were used to analyze the experimental results. The oxides involved SiO2, MnO, MnSiO3, Mn2SiO4, and MnCr2O4. The amount of oxides augmented along with the increasing oxygen partial pressure. The Fe–Mn–Cr–Si–C–O2 oxidation diagram was calculated by thermodynamic software and was used to explain the selective oxidation process of dual‐phase 1180 steel. Experimental results combined with the thermodynamic computations well.

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The effect of alloy elements on selective oxidation and galvanizability of TRIP‐aided steel

Cited by 10 publications

References 19 publications

Rapid quantitative analysis of fayalite and silica formed during decarburization of electrical steel

Rapid quantitative analysis of fayalite and silica formed during decarburization of electrical steel

Thermodynamic consideration on selective surface oxidation of high strength steels prior to hot-dip galvanizing

Experimental study and thermodynamic analysis on the selective oxidation of DP1180 dual‐phase steel

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