一种可承受100kJ / cm大热输入焊接的E级钢板及其制备方法
By optimizing the alloy element ratio to form precipitates of a specific size in the steel, the problems of grain growth and toughness in high heat input welding were solved, and high toughness and strength of Grade E steel plates were achieved under welding conditions of 100kJ/cm.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- YANSHAN UNIV
- Filing Date
- 2023-10-11
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies suffer from insufficient control over grain boundaries by nanoscale particles and insufficient nucleation ability of micron-scale particles during high heat input welding processes, resulting in poor welding performance of steel plates under high heat input.
By optimizing the proportions of alloying elements and controlling the contents of Ti, Nb, V, B, C, and N in the steel, nano-sized precipitates of 20–80 nm and micro-sized precipitates of 0.5–1.5 μm are formed, which inhibits austenite grain growth and promotes acicular ferrite nucleation, thereby improving the toughness of the weld heat-affected zone.
Under high heat input welding conditions of 100 kJ/cm, the impact value of the heat-affected zone near the weld at -40℃ reaches ≥60J, which meets the mechanical property requirements of Grade E steel plate and realizes the excellent high heat input welding performance of steel plate.
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Figure CN117363990B_ABST