Simulation and Process Optimization of Online Cooling for S460 Thick Plates
Guangyuan Wang, Zhen Wang, Feng Chai, Zhongwen Wu, Xiaobing Luo, Tao Pan
TL;DR
This study improves the cooling process for thick steel plates used in marine engineering to enhance their structural properties and toughness.
Contribution
A finite element model and optimized cooling scheme are proposed to improve the microstructure and toughness of thick S460 steel plates.
Findings
The initial cooling parameters led to poor toughness at 60 mm depth due to high pearlite content and low impact energy.
Optimized cooling increased the cooling rate at 60 mm depth and significantly improved impact energy and microstructure.
The study provides a practical methodology for enhancing TMCP processes in thick steel plates.
Abstract
Marine engineering thick plates are essential structural materials for large vessels and offshore platforms, and optimizing their manufacturing processes is critical for advancing marine equipment. This study examined the microstructural and property variations in 120 mm-thick S460 plates fabricated by thermo-mechanical controlled processing (TMCP). A finite element model was developed to simulate the cooling phase, enabling the prediction of the internal cooling path in the thick plate. An optimized cooling scheme was proposed, which was validated against the model and implemented. The following key results were obtained: (1) Under the initial cooling parameters (initial temperature: 715 °C, duration: 130 s), the 60 mm depth toughness was severely compromised, as evidenced by a low −40 °C impact energy of 59 J, significantly lower than values observed at the10 mm and 30 mm depth…
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Taxonomy
TopicsHeat Transfer and Optimization · Metallurgy and Material Forming · Advanced machining processes and optimization