碳钢车体激光填丝焊不等厚板对接接头工艺及性能  

Technology and properties of different thickness plates butt joints for carbon steel body laser filling welding

作　　者：李洋 郭丽娟 刘东军 田慧 王喜君 LI Yang, GUO Lijuan, LIU Dongjun, TIAN Hui, WANG Xijun(Manufaetuing Process Center,CRRC Tangshan Co. ,Ltd. ,Tangshan 063035 ,China)

机构地区：[1]中车唐山机车车辆有限公司制造技术中心,河北唐山063035

出　　处：《电焊机》2018年第6期29-36,共8页Electric Welding Machine

摘　　要：基于碳钢车体及轨道交通关键结构件对激光填丝焊接技术的需求,针对厚度为2.5mm和4mm车体用碳钢材料的不等厚对接接头,系统开展激光填丝焊接工艺研究及焊接工艺评定,为后续碳钢车体相关结构件的激光填丝焊工艺生产应用提供可靠的技术保证。试验结果表明:焊接接头无气孔、裂纹等缺陷,弯曲试样试样面上均未发现裂纹、气孔和夹杂等缺陷,说明该激光填丝焊接接头焊接质量优良,接头抗拉强度约为480 MPa,满足母材的要求;从拉伸试样断裂位置来看,均断于母材,说明拉伸试验体现的母材的强度试验结果,同时说明该焊接接头能满足结构对于强度的设计要求。Based on carbon steel car body, the key structure of rail transit demand for laser wire filling welding technology, according to the different thickness plates butt joints of carbon steel for car body with the thickness of 2.5 mm and 4 ram,systematically research on laser wire filling welding process and welding procedure qualification, provide reliable technical guarantee for subsequent carbon steel car body- structure of laser wire filling welding process production application. The results show that, the welding joint and bending specimens with no defects such as porosity crack,which shows that laser filling welding joint has excellent welding quality-. The joint tensile strength at around 480 MPa and it meets the requirements of the base metal. From the point of fi＇acture of the tensile samples ,they are all broken in the base metal,indicating that the tensile test reflects the strength test results of the base metal, and that welding joint can meet the design requirements of the structure for strength.

关 键 词：激光填丝焊 对接接头 不等厚板 

分 类 号：TG456.7[金属学及工艺—焊接]