公路桥梁钢的焊接行为与性能研究  

Study on Welding Behavior and Performance of Highway Bridge Steel

作　　者：刘奉侠[1] 王岚[2] 

机构地区：[1]内蒙古建筑职业技术学院市政与路桥工程学院,内蒙古呼和浩特010070 [2]内蒙古工业大学建筑材料系,内蒙古呼和浩特010051

出　　处：《铸造技术》2016年第12期2694-2696,共3页Foundry Technology

基　　金：国家自然科学基金资助项目(11162012);内蒙古自然科学基金资助项目(2014MS0507)

摘　　要：在相同电子束焊接工艺下,对比分析了不含Nb和含Nb桥梁钢的母材和焊接接头显微组织以及力学性能,并对含Nb钢焊接头和母材的耐腐蚀性能进行了研究。结果表明,在相同的电子束焊接工艺下,不含Nb的钢的热影响区和焊缝区的晶粒尺寸较为粗大,而在钢中添加Nb元素后,热影响区等轴晶和焊缝区柱状晶尺寸都变小。含Nb焊接接头的抗拉强度和断后伸长率都要高于相同焊接工艺下的不含Nb钢焊接头。The microstructure and mechanical properties of non-Nb and Nb-contained bridge steel welded joint were analyzed, and the corrosion resistance was studied. The results show that, under the same electron beam welding process, the grain size of heat affected zone and weld zone is coarse in non-Nb steel compared with Nb-contained steel. The tensile strength and elongation of welding joint of Nb-contained steel are higher than that of the non-Nb steel; the corrosion resistance of the weld joint of Nb-contained steel is better than that of base metal.

关 键 词：桥梁钢 电子束焊接 微观组织 力学性能 耐腐蚀 

分 类 号：U444[建筑科学—桥梁与隧道工程] TG406[交通运输工程—道路与铁道工程]