Study on the Decarburization Kinetics of Fe-C Alloy Strips in an Ar-H2-H2O Atmosphere

Zhou, Meijie; Ai, Liqun; Hong, Lukuo; Li, Yaqiang; Sun, Caijiao; Shi, Xinyue

doi:10.1007/s11665-022-07220-6

Cited by 3 publications

(2 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Ar-H 2 O-H 2 atmosphere was suitable for strips with thicknesses below 2 mm. The difference in average carbon content with decarburisation time under the two atmospheres has been compared in the literature [59]. In a 1.5-mm-thick Fe-4.2 wt-% C alloy strip at 1413 K, the average carbon content of Ar-H 2 O-H 2 atmosphere decarburisation for 50 min is 0.6%, and that of Ar-CO-CO 2 atmosphere decarburisation for 70 min is 0.92%.…”

Section: Studies Onmentioning

confidence: 99%

Analysis of decarburisation mechanism of Fe-C alloy strip

Zhou

Hong

et al. 2023

Materials Science and Technology

View full text Add to dashboard Cite

Comparative experiments on different decarburisation processes of Fe-C alloys in Ar-CO-CO2 and Ar-H2O-H2 atmospheres were carried out. The fundamental principles of carbon distribution, migration, and conversion are elucidated during decarburisation in both atmospheres. The completely decarburised layer of 2-mm-thick strip in Ar-CO-CO2 atmosphere appeared about 20 min later than the decarburisation in Ar-H2O-H2 atmosphere. Compared with the decarburisation in the Ar-H2O-H2 atmosphere, the carbon-rich phase dissolution zone is wider and the solid solution carbon content in the centre side is lower in the Ar-CO-CO2 atmosphere. The concentration gradient of solid solution carbon on the centre side of the interface of austenite zone in Ar-CO-CO2 atmosphere is smaller than that in the Ar-H2O-H2 atmosphere.

show abstract

Section: Studies Onmentioning

confidence: 99%

Analysis of decarburisation mechanism of Fe-C alloy strip

Zhou

Hong

et al. 2023

Materials Science and Technology

View full text Add to dashboard Cite

show abstract

“…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%

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

et al. 2022

View full text Add to dashboard Cite

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.

show abstract

Formation Mechanism and Influence of Heating Temperature and Holding Time on Surface Decarburization of 40Cr Steel during Hot Forging Process

Yuan,

Wu,

et al. 2024

steel research int.

View full text Add to dashboard Cite

During hot forging and heat treatment of 40Cr steel, a decarburized layer emerges on the surface, affecting fatigue life. However, the decarbonization of 40Cr steel has not been reported so far. The experiment mainly studies the effect of holding temperature and time on decarbonization. The 40Cr steel undergoes complete decarburization at 700 and 750 °C while experiencing a combination of complete and partial decarburization at 800 °C, transitioning solely to partial decarburization above 850 °C. The decarburized layer thickness measured at 750 and 800 °C is 140 and 200 μm respectively; the total decarburization layer thickness exhibits an exponential increase with the temperature. The thickness of the completely decarburized layer, influenced by varying factors across temperature ranges, initially rises and subsequently declines with the escalation of temperature, reaching its maximum at ≈750 °C. The maximum value of complete decarburization is 146 μm. Simultaneously, the total depth of decarburization is found to be proportional to the square root of time, adhering to Fick's second law. The fitting result is expressed as x = 165.47t1/2 at 750 °C. Notably, the existence of the decarburized layer results in a decrement in both the tensile strength and yield strength of the component, albeit accompanied by a marginal improvement in ductility.

show abstract

Study on the Decarburization Kinetics of Fe-C Alloy Strips in an Ar-H2-H2O Atmosphere

Cited by 3 publications

References 22 publications

Analysis of decarburisation mechanism of Fe-C alloy strip

Analysis of decarburisation mechanism of Fe-C alloy strip

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

Formation Mechanism and Influence of Heating Temperature and Holding Time on Surface Decarburization of 40Cr Steel during Hot Forging Process

Contact Info

Product

Resources

About