Microstructural evolution roadmap in heat-affected zones of EH36 shipbuilding steel has been investigated at different welding heat inputs. Quantified results show that resultant microstructures transform from fine bainite accompanied by acicular ferrite at low heat input, to coarse bainite at medium heat input, and to polygonal ferrite and pearlite at high heat input. In addition, it is found that heat input does not have significant influence over the characteristics of potent inclusions promoting acicular ferrite nucleation.

中文翻译：

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受控热模拟下EH36造船钢热影响区的微观组织演变路线图

在不同的焊接热输入下，对EH36造船钢热影响区的微观组织演变路线图进行了研究。定量结果表明，所得的显微组织在低热输入时从细贝氏体伴随针状铁素体转变为中热输入时变为粗贝氏体，而在高热输入时转变为多边形铁素体和珠光体。另外，发现热输入对促进针状铁素体成核的有效夹杂物的特性没有显着影响。