This study aims to improve the performances of the high-pressure water descaling technology used in steel hot rolling *** particular,a 2050 mm hot rolling line is considered,and the problem is investigated by means of...
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This study aims to improve the performances of the high-pressure water descaling technology used in steel hot rolling *** particular,a 2050 mm hot rolling line is considered,and the problem is investigated by means of a fluid–structure interaction(FSI)method by which the descaling effect produced by rolling coils with different section sizes is *** a flat fan-shaped nozzle at the entrance of the R1R2 roughing mill,the outflow field characteristics and the velocity distribution curve on the strike line(at a target distance of 30–120 mm)are *** is found that the velocity in the center region of the water jet with different target distances is higher than that in the boundary *** the target distance increases,the velocity of the water jet in the central region *** comparison with experimental results,it is shown that the simulation model can accurately predict the impact position of the high-pressure water on the impact plate,thereby providing a computational scheme that can be used to optimize the nozzle space layout and improve the slabs’descent effect for different rolling specifications.
Gases containing sulfur oxides can cause corrosion and failure of bellows used as furnace blowers in high-temperature *** order to mitigate this issue,the behavior of an effective blast furnace blower has been examine...
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Gases containing sulfur oxides can cause corrosion and failure of bellows used as furnace blowers in high-temperature *** order to mitigate this issue,the behavior of an effective blast furnace blower has been examined in ***,the Sereda corrosion model has been introduced to simulate the corrosion rate of the related bellows taking into account the effects of temperature and SO_(2) gas;such results have been compared with effective measurements;then,the average gas velocity in the pipeline and the von Mises stress distribution of the inner draft tube have been analyzed using a Fluid-Structure Interaction ***,the semi-closed internal corrosion environment caused by a 5 mm radial gap between the inner draft tube and the bellows has been *** gas flow rate in the residential space has been found to be low(0.5 ms–this value leads to a stable semi-closed internal corrosion environment for exhaust gas exchange);water phase in the exhaust gas is prone to accelerate the corrosion *** this basis,a bellows with an optimized inner draft tube has proposed,which includes corrosion-resistant honeycomb buffer rings.
Distributions of electromagnetic fields and induced forced flow inside a metal melt are crucial to understand the grain refinement of the metal driven by pulsed magneto-oscillation(PMO).In the present study,PMO-induce...
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Distributions of electromagnetic fields and induced forced flow inside a metal melt are crucial to understand the grain refinement of the metal driven by pulsed magneto-oscillation(PMO).In the present study,PMO-induced electromagnetic fields and forced flow in Ga-20 wt%In-12 wt%Sn liquid metal have been systematically investigated by performing numerical simulations and corresponding experimental *** numerical simulations have been confirmed by magnetic and melt flow *** to the simulated distribution of electromagnetic fields under the application of PMO,the strongest magnetic field,electric eddy current and Lorentz force with inward radial direction inside the melt are concentrated adjacent the sidewall of cylindrical melt at the cross section of middle height of *** a result,a global forced flow throughout the whole cylindrical column filled with Ga-20 wt%In-12 wt%Snmelt is initiated with a flow structure of two pair of symmetric *** PMO-induced electromagnetic fields and forced flow in Al-7 wt%Si melt have been numerically *** contribution of electromagnetic fields and forced flow to the grain refinement of Al-7 wt%Sialloy under the application of PMO is *** indicates that the forced flow may play a key role in the grain size reduction.
Basalt fiber polymer concrete (BFPC) machine tool has the properties of lightweight and high damping, and the BFPC machine tool has excellent vibration damping and anti-vibration performance, which can improve the pro...
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This study investigated the effect of Pt-Al coating on the fatigue behavior of a second-generation single-crystal superalloy (DD5) at different temperatures. The Pt-Al bond coat was deposited on the superalloy, and ro...
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