大热输入焊接用Q420C钢板的开发  

Development of Q420C Steel Plate for High Heat Input Welding

作　　者：刘卫航 LIU Weihang(Technique&Products Manufacturing Department of Baosteel Zhanjiang Iron and Steel Co.,Ltd.,Zhanjiang 524072,China)

机构地区：[1]宝钢湛江钢铁有限公司制造管理部,湛江524072

出　　处：《理化检验（物理分册）》2020年第12期33-35,51,共4页Physical Testing and Chemical Analysis(Part A:Physical Testing)

摘　　要：通过成分设计和工艺设计开发了大热输入焊接用Q420C钢板,并对其焊接性能进行了试验。结果表明:该Q420C钢板的显微组织细小均匀,力学性能较好,在-80℃下其冲击吸收能量大于200J。在热输入为250kJ·cm-1的情况下,其熔合线处的冲击吸收能量远高于技术要求,焊接性能良好。Q420C steel plate for high heat input welding was developed by composition design and process design,and its welding performance were tested.The results show that the microstructure of the Q420C steel plate was fine and uniform with good mechanical properties.The impact absorption energy of the Q420C steel plate was more than 200 Jat-80 ℃.When the heat input was 250 kJ·cm-1,the impact absorption energy at the fusion line was much higher than the technical requirements,and the welding performance was good.

关 键 词：大线能量焊接 Q420C钢板 成分设计 工艺设计 性能验证 

分 类 号：TF03[冶金工程—冶金物理化学]