Abstract The gas tungsten arc weldability of micro-alloyed hot-rolled ferritic XPF800 steel, which is newly produced by Tata Steel, has been studied. The weld geometry profile, mechanical properties and microstructure affected by heat input have been investigated. The micro examination of the welded joint has been characterized utilizing optical microscope and scanning electron microscope. Atomic concentrations of metallic elements in carbides have been determined by energy dispersive X-ray spectrometry. The optimum parameters for current, welding speed and heat input have been found to be 140 A, 100 mm/min and 0.62 kJ/mm in the GTAW of XPF800 plates, respectively.

中文翻译：

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微合金化热轧铁素体 XPF800 钢 GTAW 力学性能和显微组织表征

摘要 研究了塔塔钢铁公司新生产的微合金化热轧铁素体XPF800钢的钨极气体保护焊性能。研究了受热输入影响的焊缝几何形状、机械性能和微观结构。利用光学显微镜和扫描电子显微镜对焊接接头进行了显微检查。碳化物中金属元素的原子浓度已通过能量色散 X 射线光谱法测定。已发现在 XPF800 板的 GTAW 中，电流、焊接速度和热输入的最佳参数分别为 140 A、100 mm/min 和 0.62 kJ/mm。