中间Cu层对TA1/X65复合板熔焊接头性能的影响  

Effect of Intermediate Cu-layer on Mechanical Properties of Welded Joints of TA1/X65 Composite Plate

作　　者：张敏[1] 王晓伟[1] 韩挺[1] 张涛 慕二龙 

机构地区：[1]西安理工大学材料科学与工程学院,西安710048

出　　处：《材料研究学报》2018年第2期81-89,共9页Chinese Journal of Materials Research

基　　金：国家自然科学基金(51274162);陕西省教育厅服务地方专项计划(16JF021);陕西省教育厅重点实验室科研计划(15JS082)~~

摘　　要：使用Cu-Ag-Mo-Nb药芯焊丝对TA1/X65和TA1/Cu/X65两种爆炸复合板进行熔焊对接,使用SEM、EDS等手段表征接头的微观形貌、元素分布及成分组成,研究了两种试板接头的力学性能。结果表明,两种试板的焊缝各层衔接良好,钛、钢与过渡层的界面处均有明显的灰色过渡带,接头没有气孔、夹杂或裂纹等缺陷。SEM、EDS分析结果表明,在两层试板的三角区产生了Ti Fe相。三层试板中的Cu层防止了Ti、Fe的互扩散,使焊缝两侧至过渡层Ti元素和Fe元素的扩散明显降低,钛焊缝中Fe的含量和钢焊缝中Ti的含量也显著降低。对接头性能的测试结果表明,三层试板的三项力学性能指标均优于两层试板。Two explosively formed composite plates TA1/X65 and TA1/Cu/X65 were welded with flux cored wire of Cu-Ag-Mo-Nb. Then the effect of the intermediate Cu-layer on the microstructure, element distribution, and mechanical property of the butt welding joints are investigated by means of SEM, EDS and mechanical tester. The results show that the two types plates could be well connected by butt welding, and there exist obvious gray transition zones at the interfaces of titanium, steel and the formed transition layer, but no pores, inclusions, cracks and other defects in the weld joints were observed. According to the analysis of SEM, EDS and XRD, the Ti Fe-phase in the triangle area of the plate TA1/X65 is inevitable. The Cu-layer within of the plate TA1/Cu/X65 can effectively prevent the mutual diffusion of Ti and Fe,thus the diffusion of Ti and Fe onto the transition zone decreased significantly, as a result, the Fe-content in the weld titanium and the Ti-content in the weld steel has also been significantly reduced. Therefore,the weld composite plate TA1/Cu/X65 exhibits better mechanical properties rather than the plate TA1/X65 without Cu-layer in terms of tensile strength, bending modulus and impact strength.

关 键 词：复合材料 药芯焊丝 微观组织 三层复合板 元素分布 力学性能 

分 类 号：TG422[金属学及工艺—焊接]