Direct Observation of Austenite and Pearlite Formation in Thermally Simulated Coarse Grain Heat-Affected Zone of Pearlite Railway Steel

Khan, Adnan Raza; Shi, Yu; Zubair, Muhammad

doi:10.1007/s11665-020-05327-2

Cited by 2 publications

(1 citation statement)

References 27 publications

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“…The heat flow at this peak was relatively low. Based on reported dissolution temperatures for V and the precipitation temperature of V(C, N) [41], it can be confirmed that this exotherm peak was due to precipitation of the V(C, N) phase. The temperature range measured here was the same as the precipitation temperature of the V(C, N) in studies by Pan et al [42].…”

Section: Resultsmentioning

confidence: 87%

Effect of heat treatment process on precipitation of V microalloyed steel

Xun

Zhang

et al. 2022

Ironmaking & Steelmaking

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Controlled rolling and controlled cooling processes achieve high-strength alloys due to their combined effects on the grain refinement, dispersion, and phase transformations. This paper studies the dissolution of V in austenite by normalizing treatments. The samples were then annealed to form uniform, fine, and dispersed V-based precipitates which in turn facilitated subsequent phase transitions in the steel. The results showed that V fully dissolved into austenite when the steel was treated. Besides, when the steel was annealed, V precipitated in the form of V (C, N), and the V(C, N) precipitates promoted the formation of ferrite. At the same time, fine pearlite phases also formed, and the V(C, N) precipitates were distributed among the pearlite lamellae. The uniformly dispersed V(C, N) precipitates further regulated the microphase organization, refined the grains, and acted as the microalloying element, making the steel more uniform, and improving the mechanical properties of the steel.

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Section: Resultsmentioning

confidence: 87%