中间Cu层对TA1/X65复合板熔焊接头性能的影响

doi:10.11901/1005.3093.2017.215

材料研究学报

2018, Vol. 32

Issue (2): 81-89 DOI: 10.11901/1005.3093.2017.215

研究论文

本期目录 | 过刊浏览

中间Cu层对TA1/X65复合板熔焊接头性能的影响

张敏(

), 王晓伟, 韩挺, 张涛, 慕二龙

西安理工大学材料科学与工程学院西安 710048

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

Min ZHANG(

), Xiaowei WANG, Ting HAN, Tao ZHANG, Erlong MU

College of Materials Science and Engineering, Xi'an University of Technology, Xi'an 710048, China

引用本文:

张敏, 王晓伟, 韩挺, 张涛, 慕二龙. 中间Cu层对TA1/X65复合板熔焊接头性能的影响[J]. 材料研究学报, 2018, 32(2): 81-89.
Min ZHANG, Xiaowei WANG, Ting HAN, Tao ZHANG, Erlong MU. Effect of Intermediate Cu-layer on Mechanical Properties of Welded Joints of TA1/X65 Composite Plate[J]. Chinese Journal of Materials Research, 2018, 32(2): 81-89.

全文: PDF(9669 KB) HTML

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TiFe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。

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

Abstract：

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 TiFe-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.

Key words： composite flux cored wire microstructure three-layer composite plate distribution of element mechanical property

收稿日期: 2017-03-29

ZTFLH:

TG422

基金资助: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)

作者简介:

作者简介张敏,男,1967年生,教授

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https://www.cjmr.org/CN/10.11901/1005.3093.2017.215 或 https://www.cjmr.org/CN/Y2018/V32/I2/81

图1 两层试板坡口示意图

图2 三层试板坡口示意图

表1 焊接工艺参数

图3 Cu-Ag-Mo-Nb药芯焊丝接头的微观组织

图4 Cu-Ag-Mo-Nb药芯焊丝接头横截面XRD图谱

表2 焊缝EDS测试结果

图5 三层试板焊接接头的扫描图

图6 焊缝表面的XRD图谱

表3 焊缝中各相的元素含量(原子分数,%)

表4 复合板对接接头拉伸试验结果

图7 弯曲试验结果

图8 冲击试验结果

图9 弯曲的宏观形貌

图10 试样拉伸断口形貌图

图11 冲击断口的形貌

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