电焊机2024，Vol.54Issue(10)：70-76,85,8.DOI:10.7512/j.issn.1001-2303.2024.10.08
无镀铜焊丝焊接S355J2W+N耐候钢的焊接接头性能与组织
Properties and Microstructure of S355J2W+N Weathering Steel Welded with Non-coppered Wire
陈晓霞 1张艳辉 1鲁二敬 1石宝岭 1侯金柱1
作者信息
- 1. 中车唐山机车车辆有限公司,唐山 河北 063035
- 折叠
摘要
Abstract
The study on the performance of S355J2W+N weathering steel welded joints using non-copper coated welding wire OK AristoRod 13.26 involved MAG welding tests on 12 mm thick steel.The research methods included tensile testing,bending testing,impact testing,hardness testing,metallographic structure analysis,and fracture surface analysis.The results indicate that the welded joints of S355J2W+N weathering steel using non-copper coated welding wire exhibit good tensile and bending properties,with tensile strength and yield strength higher than the standard values of the base material,and the fracture surface shows characteristics of ductile fracture.The impact toughness of the weld is lower than that of the heat-affected zone and decreases with decreasing temperature,but both meet the standard requirement that the impact energy of the base material should not be less than 27 J(-20℃).The hardness of various regions of the welded joint conforms to the ISO15614-1 standard,all being less than HV380,with the base material having the lowest hardness,the over-heated zone the highest,and the greatest fluctuation in hardness observed in the heat-affected zone.Metallographic structure analysis shows that the welded joint consists of weld zone,over-heated zone,phase transformation recrystallization zone,and incom-plete phase transformation recrystallization zone,with the phase transformation recrystallization zone having fine and uni-form structures,exhibiting the best performance.The performance of S355J2W+N weathering steel welded joints using non-copper coated welding wire meets the production standard requirements.关键词
无镀铜焊丝/S355J2W+N耐候钢/力学性能/金相组织/断裂特征Key words
non-coppperd wire/S355J2W+N/mechanical properties/metallographic structure/fracture characteristic分类
矿业与冶金引用本文复制引用
陈晓霞,张艳辉,鲁二敬,石宝岭,侯金柱..无镀铜焊丝焊接S355J2W+N耐候钢的焊接接头性能与组织[J].电焊机,2024,54(10):70-76,85,8.
