Selective Oxidation of a 0.1C-6Mn-2Si Third Generation Advanced High-Strength Steel During Dew-Point Controlled Annealing

Pourmajidian, Maedeh; McDermid, Joseph R.

doi:10.1007/s11661-018-4513-7

Cited by 25 publications

(15 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The presence of a large number of stable oxides would form oxide layers. Moreover, as pointed by many authors [11,18,19], film-like MnO is more likely to cause surface defects with a deterioration of the quality of zinc coating than that of granulated oxide.…”

Section: Thermodynamic Analysis On the Oxide Formation Of Experimental Steel During Annealingmentioning

confidence: 97%

“…So, it is obviously not enough to consider only the influence of dew point on galvanizability for high strength steels. Recently, Pourmajidian et al [11][12][13] studied the effects of annealing temperatures, dew points and composition on the oxidation behavior and reactive wetting of 0.1 C-6 Mn-2 Si steel. However, it was still difficult to find out the key factor that determines the galvanizability of medium manganese steel and develop the reasonable galvanizing process accordingly.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Hot-Dip Galvanizing Process on Selective Oxidation and Galvanizability of Medium Manganese Steel for Automotive Application

Chen

Zheng

et al. 2020

Coatings

View full text Add to dashboard Cite

A medium manganese steel with 7.5 wt.% Mn for automobile application was galvanized in a continuous Hot Dip Galvanizing (HDG) simulator under different galvanizing conditions. It was shown that the effects of dew point, annealing temperature and annealing atmosphere on the surface oxidation of steel could be comprehensively evaluated by the consideration of oxygen partial pressure P(O2). Although Mn2SiO4 was a thermodynamic stable phase when P(O2) varied from 10−28 to 10−21 atm, it was difficult to form Mn–Si–O composite oxide because there was no enrichment of silicon on the steel surface. So, this oxide was generally formed in the Fe substrate and had little effect on the galvanizability. With the increase in P(O2) above 10−25 atm, MnO particles in the form of the thermodynamic stable phase became coarser and tended to aggregate, which hindered the formation of a continuous inhibition layer, resulting in the defects of bare spots on the galvanized surface of the steel. When the oxygen partial pressure greater than 10−22 atm, film-like MnO layer was formed on the surface of steel sample, which obviously deteriorated the galvanizability. The galvanizability of the steel can be improved by the regulation of oxygen partial pressure; based on this, the reasonable zinc plating process parameters can be developed.

show abstract

Section: Thermodynamic Analysis On the Oxide Formation Of Experimental Steel During Annealingmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Effect of Hot-Dip Galvanizing Process on Selective Oxidation and Galvanizability of Medium Manganese Steel for Automotive Application

Chen

Zheng

et al. 2020

Coatings

View full text Add to dashboard Cite

show abstract

“…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 . In the galvanizing stage after annealing, these oxides will hinder the contact between the steel plate and zinc liquid, resulting in bare spot defects and unacceptable coatings.…”

Section: Introductionmentioning

confidence: 99%

“…Jung 19 also explained the oxidation process of the Fe–Si–Mn steel using the FactSage software. On the basis of these researches, it is known that the selective oxides of Fe–Si–Mn steel involve SiO 2 , MnO, MnSiO 3 , and Mn 2 SiO 4 11,18,20 . The FactSage software 20 has been widely applied for the thermodynamic analysis of selective oxidation 20–24 .…”

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

View full text Add to dashboard Cite

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.

show abstract

“…Even a large bare area appeared on the surface when Mn content reached 4.6 wt.% under the high dew point condition. Pourmajidian et al [7] studied the effect of annealing conditions on galvanizability of 0.1C−6Mn−2Si steel. It was determined that the minimum rate of the surface oxide growth corresponded to the lowest oxygen partial pressure at a dew point of −50 • C. However, the experimental results showed that better wetting of zinc liquid could be obtained at high dew point (+5 • C).…”

Section: Introductionmentioning

confidence: 99%

Effect of Dew Point and Alloy Composition on Reactive Wetting of Hot Dip Galvanized Medium Manganese Lightweight Steel

Yang

Chen

et al. 2020

Coatings

View full text Add to dashboard Cite

For its application development, the medium manganese lightweight steel with 3 wt.% and 10 wt.% Mn contents was galvanized in continuous hot dip galvanizing (HDG) simulator and the process parameters on the production line were adopted. Combined with the experimental analysis and thermodynamic calculation, the effect of dew point and alloy composition on the reactive wetting of the steel was investigated. It was shown that MnO existed as a stable oxide for the medium Mn steel with 5 wt.% Al as long as Mn content exceeded 5.1 wt.%. The galvanizability of the steel with 10 wt.% Mn was deteriorated resulting from the formation of a thick and continuous external MnO layer, which had adverse effects on the wettability. MnO particles in the form of unstable phase can be found at the surface of 3Mn steel galvanized at dew point +10 °C. It distributed sparsely and the reactive wettability can be obtained by “bridging connection”, which mitigated the damage of external oxidation. Moreover, the lower dew point, the less tendency to form external oxide. Although the decrease of dew point to −30 °C had a certain benefit for coating quality, the galvanizing quality of 10Mn steel could not be improved due to the formation of a thick MnO layer. Therefore, the Mn content played a stronger role than dew point on the reactive wetting of hot dip galvanized medium manganese lightweight steel.

show abstract

Selective Oxidation of a 0.1C-6Mn-2Si Third Generation Advanced High-Strength Steel During Dew-Point Controlled Annealing

Cited by 25 publications

References 42 publications

Effect of Hot-Dip Galvanizing Process on Selective Oxidation and Galvanizability of Medium Manganese Steel for Automotive Application

Effect of Hot-Dip Galvanizing Process on Selective Oxidation and Galvanizability of Medium Manganese Steel for Automotive Application

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

Effect of Dew Point and Alloy Composition on Reactive Wetting of Hot Dip Galvanized Medium Manganese Lightweight Steel

Contact Info

Product

Resources

About