In this study, a novel Ti–Mg–Ce–V-treated steel was designed for large heat input welding. The addition of Ce in Ti → Mg deoxidation process ensured sufficient Ti–Mg–Ce oxide inclusions in steel. The complex precipitation of V further improved the nucleation ability of ferrite. At simulated heat input of 500 kJ/cm, significant austenite pinning effect and intragranular ferrite nucleation were realized concurrently. A fine-grained microstructure with high impact toughness was obtained.

中文翻译：

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调整大热输入焊接钢中粗晶 HAZ 的显微组织：Ti-Mg-Ce-V 夹杂物/沉淀颗粒的影响

在这项研究中，一种新型 Ti-Mg-Ce-V 处理钢被设计用于大热输入焊接。在 Ti → Mg 脱氧过程中添加 Ce 确保钢中含有足够的 Ti-Mg-Ce 氧化物夹杂物。V的复合析出进一步提高了铁素体的形核能力。在 500 kJ/cm 的模拟热输入下，同时实现了显着的奥氏体钉扎效应和晶内铁素体形核。获得了具有高冲击韧性的细晶粒显微组织。