经济型液化气体船用碳锰低温钢板焊接数值模拟研究

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中图分类号：TG44 文献标识码：B 文章编号：1003-0514（2025）05-0048-04

Numerical simulation study on welding of carbon-manganese low-temperature steel plates for economical liquefied gas carriers

Dong Yanqing

（Nanjing Iron and Steel Co.，Ltd.，Nanjing2711O4，Jiangsu，China）

Abstract：Carbon manganese low-temperature steel plate，asalow-temperature steel forliquefied gasships，has good welding performance.The welding processparameters affect the metalographic structure and mechanical properties of the weld metal.Thisarticle takescarbonmanganeselow-temperature stel plate astheresearchobject，anduses manual arc welding （SMAW）and submergedarc welding （SAW） methods to weld thebuttwelded joints ofcarbon manganese lowtemperaturesteelplate，andtestsitsperformanceanalysis.Firstly，thewelding processofcarbonmanganeselow-temperature steel platewaselaboratedindetail，andthewelding processparameterswereetermined.Secondly，anumericalsimulation model forthewelding process ofcarbon manganese low-temperature steel plates wasproposed.The numerical simulation resultsshowthatthe testplatewithaheat inputof18KJ/mhasasmalerlinear energy，andthetemperature fieldshows that the weldseam difusesslowlytobothsides.Thepeak temperatureof the weldseamisalsolower，andthe temperature gradient range is also smaller.

Key words：liquefied gas ship；carbon manganese low-temperature steel plate；welding process；numerical simulation; positive tempering cooling

0引言

在全球能源结构转型的下，液化气体作为一种清洁、高效的能源，逐渐成为各国能源战略中的重要选择，尤其是液化石油气（LPG）和液化天然气（LNG）。（剩余3409字）