摘要
对60mm厚船板EH40进行了线能量达530kJ/cm的电渣焊试验,并对焊接接头的组织和冲击性能进行了表征。组织分析结果表明:焊接接头粗晶热影响区由针状铁素体、多边形铁素体及晶界铁素体构成,该区宽度约为1mm;焊缝区由尺寸约为10μm的针状铁素体及晶界铁素体构成;熔合区除针状铁素体和晶界铁素体外,还有少量侧板条铁素体。力学性能测试结果表明:焊缝区、熔合区、粗晶热影响区-20℃冲击功均≥60J,且焊后热影响区没有明显软化现象,接头性能满足要求。
Electro-slag welding with heat input of 530kJ/cm was applied to 60mm thick shipbuilding plate EH40, and microstructure and mechanical properties of the weld joint were characterized. Different regions such as heat affected zone, fusion zone, weld metal and base metal are found across the weld joint by microstructure analysis. A narrow coarse grain heat affected zone consisting of acicular ferrite, polygonal ferrite and grain boundary ferrite is found, width of which is less than 1 mm. Acicular ferrite （≤ 10μm） and grain boundary ferrite is observed at weld metal, while fusion zone have a complex structure of acicular ferrite, grain boundary ferrite and ferrite side plate. Mechanical property tests show that the absorbed energy of WM, FL and CGHAZ at --20 ℃ during Charpy impact test is more than 60J, no evident softening phenomenon occurred at heat affected zone, and other proper- ties met the requirement.
出处
《钢铁研究学报》
CAS
CSCD
北大核心
2013年第9期52-57,共6页
Journal of Iron and Steel Research
