Effects of Mn and Si on the ferrite decarburization of spring steel

Wang, Hui; Su, Fuyong; Wen, Zhi; Li, Cunwang

doi:10.1016/j.jmrt.2023.09.259

Cited by 5 publications

(2 citation statements)

References 37 publications

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“…Consequently, starting with hot-rolled materials, on a microscale, a banded segregation profile is observed in the plane of rolling direction (RD) and normal direction (ND) and, to a lesser degree, in the plane of transversal direction (TD) and normal direction. As a result, the strip can have a lamellar-like structure of microchemical bands with locally different transformation temperatures [20][21][22][23]. Depending on the degree of segregation and the added alloying elements, the differences in the thermodynamic transformation temperatures can be significant [22,[24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Microsegregation Influence on Austenite Formation from Ferrite and Cementite in Fe–C–Mn–Si and Fe–C–Si Steels

Krugla,

Offerman,

Sietsma

et al. 2024

Metals

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The production reality of sheet steels from casting to the end product is such that in the cases of ultra- and advanced high-strength steels, we have to deal with the segregation of elements on macro- and microlevels. Both can have a significant impact on the microstructure formation and resulting properties. There are several production stages where it can influence the transformations, i.e., casting, hot rolling process and annealing after cold rolling. In the present work, we focus on the latter, and more specifically, the transformation from ferrite–cementite to austenite, especially the nucleation process, in cold-rolled material. We vary the levels of two substitutional elements, Mn and Si, and then look in detail at the microsegregation and nucleation processes. The classical nucleation theory is used, and both the chemical driving force and strain energy are calculated for various scenarios. In the case of a high Mn and high Si concentration, the nucleation can thus be explained. In the cases of high Mn and low Si concentrations as well as low Mn alloys, more research is needed on the nuclei shapes and strain energy.

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Section: Introductionmentioning

confidence: 99%

Microsegregation Influence on Austenite Formation from Ferrite and Cementite in Fe–C–Mn–Si and Fe–C–Si Steels

Krugla,

Offerman,

Sietsma

et al. 2024

Metals

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“…During the decarburization process, the concentration of C and Mn decreases on the surface due to carbon diffusion, while the core retains the same initial carbon concentrations; the same effect occurs with manganese, but to a lesser extent. According to Wang et al [ 15 ], in the decarburization process, the carbon atoms inside the material diffuse outward and react with the gases inside the furnace, inducing the loss of carbon atoms. It is important to highlight that alloying elements have a marked influence on the decarburization resistance of austenitic manganese steels, such as Mn, Cr, and Si.…”

Section: Introductionmentioning

confidence: 99%

Effect of Heat Treatment on the Microstructural Heterogeneity and Abrasive Wear Behavior of ASTM A128 Grade C Steel

Higuera-Cobos,

Cely-Bautista,

Muñoz-Bolaños

2024

Materials

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Microstructural heterogeneities of an ASTM A128 grade C steel subjected to heat treatments and their effect on abrasive wear behavior were investigated. The heat-treatment process involved different austenization times at 1050 °C and quenching media. To characterize the effects of heat treatment on the material’s microstructure and mechanical behavior, two microscopy techniques were used: optical microscopy (OM), and scanning electron microscopy (SEM). The chemical composition of the material was obtained using X-ray fluorescence (XRF) optical emission spectrometry. The variation in carbide composition was evaluated using X-ray Energy Dispersive Spectroscopy (EDS). To characterize the mechanical behavior of the steel, hardness measurements and abrasive wear tests were performed after homogenization annealing and quenching treatments. The results showed that the heat-treated samples developed a heterogeneous microstructure, with the presence of austenitic grains and Martensite around the surface of the samples induced by decarburization in both the protected and unprotected specimens. The specimens with lower decarburization presented less formation of Martensite and precipitated carbides, resulting in lower hardness values and higher abrasion resistance (solution treatment at 1080 °C for 1 h + sand protection + brine quenching).

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Comparative analysis of wear properties between electroless Ni-B coating and commercial ZnAl coating on 38Si7 steel used in railway system

Dursunlar,

Taş,

Akgül

et al. 2024

Engineering Science and Technology, an International Journal

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Effects of Mn and Si on the ferrite decarburization of spring steel

Cited by 5 publications

References 37 publications

Microsegregation Influence on Austenite Formation from Ferrite and Cementite in Fe–C–Mn–Si and Fe–C–Si Steels

Microsegregation Influence on Austenite Formation from Ferrite and Cementite in Fe–C–Mn–Si and Fe–C–Si Steels

Effect of Heat Treatment on the Microstructural Heterogeneity and Abrasive Wear Behavior of ASTM A128 Grade C Steel

Comparative analysis of wear properties between electroless Ni-B coating and commercial ZnAl coating on 38Si7 steel used in railway system

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