CAJ | 학술논문

针对桥梁建造现场中要求焊接接头必须具有优良的接头性能，采用WER60和WER70N气体保护焊丝匹配WNQ570钢两种交货状态下的3种规格钢板进行了气保焊接试验。试验结果表明，接头抗拉强度和冷弯性能优良；接头过热区主要为贝氏体组织，焊缝金属主要为细小的针状铁素体组织，焊缝具有优良的低温冲击韧性；焊缝表层与中心全断面焊缝HV10均小于250，接头同时具有较低的时效敏感系数及较高的低温冲击韧性。
침대교량건조현장중요구한접접두필수구유우량적접두성능，채용WER60화WER70N기체보호한사필배WNQ570강량충교화상태하적3충규격강판진행료기보한접시험。시험결과표명，접두항랍강도화랭만성능우량；접두과열구주요위패씨체조직，한봉금속주요위세소적침상철소체조직，한봉구유우량적저온충격인성；한봉표층여중심전단면한봉HV10균소우250，접두동시구유교저적시효민감계수급교고적저온충격인성。
In bridge construction, the performance requirements of welded joint must be excellent. In this article, the gas shielded welding tests were carried out on 3 kinds of steel plate under 2 delivery conditions by adopting WER60 and WER70N welding wires matching WNQ570 steel. The results indicated that the tensile strength and cold bending of welded joint are excellent, the superheating area of welded joint are mainly bainite structure, the weld metal are mainly fine acicular ferrite structure, and the weld is with good low-temperature impact toughness. The HV10 hardness values of weld surface and the center of weld both are less than 250HV10, the welded joint is with low aging sensitive coefficient and high impact toughness.