Real-time observation of bainite formation at heterogeneous phases in a high-strength weathering steel

Cheng, Jinkun; Qing, Jiasheng; Guo, Yuehua; Shen, Houfa

doi:10.1007/s42243-018-0126-z

Cited by 2 publications

(2 citation statements)

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“…During the phase transformation process, VC and TiC can also serve as efficient nucleation sites for bainite. [11] Numerous researchers have previously investigated the refinement and improvement of carbides by NbC. [12][13][14] Nevertheless, there are few reports on the promotion of austenite nucleation by NbC during solidification.…”

Section: Introductionmentioning

confidence: 99%

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Refinement of Microstructure and Enhancement of Wear Resistance of Ni–Cr Cast Iron by NbC

Cao,

Wang,

Wang

et al. 2024

steel research int.

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This article investigates the influence of niobium addition on the microstructure and properties of Ni–Cr cast iron. In situ observations and analysis of phase precipitation during solidification are conducted through a high‐temperature laser scanning confocal microscope and Thermo‐Calc software. The refining mechanism of the microstructure and the enhancement of wear resistance by NbC are explored. The results indicate that with an increase in Nb content, the precipitation temperature of NbC particles gradually rises. When the niobium content exceeds 0.2%, NbC becomes the first precipitated phase during the solidification of the liquid phase. NbC particles can serve as heterogeneous nucleus for austenite, refining the grain structure of Ni–Cr cast iron. The existence of NbC particles within the grain impedes the elongation of martensite and bainite bundles while providing additional nucleation sites to accelerate the phase transformation. The grain refinement and the obstructive influence of NbC particles collectively induce a more disordered bainitic structure. Moreover, the exceptional hardness of NbC particles effectively safeguards the matrix from abrasion, consequently enhancing the wear resistance of Ni–Cr cast iron.

show abstract

Section: Introductionmentioning

confidence: 99%

“…During the phase transformation process, VC and TiC can also serve as efficient nucleation sites for bainite. [ 11 ]…”

Section: Introductionmentioning

confidence: 99%

Refinement of Microstructure and Enhancement of Wear Resistance of Ni–Cr Cast Iron by NbC

Cao,

Wang,

Wang

et al. 2024

steel research int.

View full text Add to dashboard Cite

show abstract

Stabilization technology and corrosion mechanism of rust layer on Q370 weathering steel surface

Sun²,

Sun³

et al. 2022

J. Iron Steel Res. Int.

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Real-time observation of bainite formation at heterogeneous phases in a high-strength weathering steel

Cited by 2 publications

References 24 publications

Refinement of Microstructure and Enhancement of Wear Resistance of Ni–Cr Cast Iron by NbC

Refinement of Microstructure and Enhancement of Wear Resistance of Ni–Cr Cast Iron by NbC

Stabilization technology and corrosion mechanism of rust layer on Q370 weathering steel surface

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