CAJ | 학술논문

采用脉冲旁路耦合电弧MIG熔钎焊方法用ER4043铝合金焊丝对5052铝合金/镀锌钢异种金属进行搭接焊，通过扫描电镜、能谱仪、X射线衍射仪对所获得的铝/钢连接界面进行了分析与研究。结果表明：焊接接头焊趾处是一个Zn的富集区，通过对该区域组织进行分析发现，焊趾处的物相由靠近钢侧的Fe2Al5Zn0.4和焊缝中的Al-Zn固溶体组成。焊缝中的Si元素参与了界面处化合物层的反应，并生成了Al8Fe2Si三元金属间化合物，该三元金属间化合物沿着焊缝侧金属间化合物FeAl3的边缘分布。进一步线扫描发现：Si元素在整个界面反应层中有明显富集现象。此外，在测试结果的基础上对Fe-Al-Si三元金属间化合物的生长过程进行探讨。
채용맥충방로우합전호MIG용천한방법용ER4043려합금한사대5052려합금/도자강이충금속진행탑접한，통과소묘전경、능보의、X사선연사의대소획득적려/강련접계면진행료분석여연구。결과표명：한접접두한지처시일개Zn적부집구，통과대해구역조직진행분석발현，한지처적물상유고근강측적Fe2Al5Zn0.4화한봉중적Al-Zn고용체조성。한봉중적Si원소삼여료계면처화합물층적반응，병생성료Al8Fe2Si삼원금속간화합물，해삼원금속간화합물연착한봉측금속간화합물FeAl3적변연분포。진일보선소묘발현：Si원소재정개계면반응층중유명현부집현상。차외，재측시결과적기출상대Fe-Al-Si삼원금속간화합물적생장과정진행탐토。
The dissimilar metals of 5052 aluminum alloy/galvanized steel were joined with lap joint by pulsed double electrode gas metal arc welding-brazing with ER4043 filler metal. The interfacial microstructures of the joints were analyzed by scanning electron microscopy, energy dispersive spectroscopy and X-ray diffractometry. The results show that a zinc-rich zone locates at the weld toe,which is mainly composed of Al-Zn solid solution at the weld seam side and Fe2Al5Zn0.4 at the galvanized steel side. Si element in weld seam involves in metallurgy reaction of intermetallic compound formation and the Al8Fe2Si ternary phase is found, the phase Al8Fe2Si forms along FeAl3 side. The results of linear scanning indicate that Si atom obviously aggregates in the intermetallic compound layers. Further, the formation process of Fe-Al-Si ternary intermetallic compound was discussed on the basis of the test results.