Effect of Inflow Mode and Parameters on Temperature and Phase Transition of Wires During Isothermal Quenching in Molten Salt Bath

Li, Jun; Wang, Lei; Xing, Chenyang; Zhang, Yu; Wang, Bo; Zhang, Jieyu

doi:10.1007/s11663-023-02959-2

Cited by 1 publication

(4 citation statements)

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“…The simulation method can be found in articles previously published [23]. The first step is to establish a steady-state salt bath model and calculate the HTC, and the second step is to establish a transient wire slice model and acquire the wires' temperature field.…”

Section: Simulation Methodsmentioning

confidence: 99%

“…where q L is the latent heat, which is measured with a DSC (Differential Scanning Calorimeter). Its value refers to a previously published article [23].…”

Section: Fundamental Equations For the Wire Slice Modelmentioning

confidence: 99%

“…As shown in Equation ( 1), the classical JMAK equation is also used in this paper, using the additivity rule studied by Scheil to calculate the incubation period. For a detailed description of the phase transformation model, please refer to the article published previously [23].…”

Section: Phase Transformation Modelmentioning

confidence: 99%

“…The salt then flows back to the bottom tank through the outlet, where it is reheated and the above process repeats in a cycle. The thermo-physical parameters of the quenching medium and wire are also referred to in previous work [23]. Since the salt bath is well insulated during actual production, the walls of the salt bath are considered to be adiabatic.…”

Section: Initial and Boundary Conditionsmentioning

confidence: 99%

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A Novel Design of a Molten Salt Bath Structure and Its Quenching Effect on Wire Transformation from Austenite to Sorbite

Li,

Wang,

Zhang

2024

Metals

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The technology for obtaining sorbite by isothermal quenching of high-temperature molten salt has been used by more and more factories to produce wires with high tensile strength. In this paper, the controlling cap and bottom pipeline of the original salt bath are redesigned. The mathematical model previously proposed is used to simulate the redesigned salt bath model, and the flow field is analyzed in detail. The redesigned and original controlling cap are compared in detail by applying third-generation vortex identification technology. Then, by using the inverse heat transfer method, the heat transfer coefficient (HTC) during the boiling heat transfer stage of the wire rod in molten salt is calculated by taking advantage of quenching experimental data, on the basis of which the original model is corrected. Finally, a new salt bath design is proposed, which divides the salt bath into two parts. The first salt bath at 515 °C is used to cool the austenitized wire and complete the initial phase transformation. The second salt bath at 560 °C is used to prevent the transformation from retained austenite to bainite, and to induce its transformation from retained austenite to sorbite.

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Section: Simulation Methodsmentioning

confidence: 99%

“…where q L is the latent heat, which is measured with a DSC (Differential Scanning Calorimeter). Its value refers to a previously published article [23].…”

Section: Fundamental Equations For the Wire Slice Modelmentioning

confidence: 99%

Section: Phase Transformation Modelmentioning

confidence: 99%

Section: Initial and Boundary Conditionsmentioning

confidence: 99%

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