摘要
分别以AlSi5药芯焊丝、AlSi12药芯焊丝作为填充金属,采用CMT熔钎焊连接5086铝合金与Q235钢。研究不同焊丝成分、不同参数下熔钎焊接头宏观形貌、微观组织及力学性能。结果表明:AlSi5药芯焊丝作为填充金属时所形成的金属间化合物层相较于AlSi12药芯焊丝所形成的金属间化合物层要更厚,说明Si元素对于金属间化合物层的形成起到了抑制作用。通过EDS和XRD对断口分析得到AlSi5药芯焊丝作为填充金属时断口形成了Fe_(2)Al_(5)和AlMg_(4)Zn_(11),而AlSi_(12)药芯焊丝作为填充金属时断口主要形成了Fe_(4)Al_(13)、Al_(6)CuMg_(4)、Al_(0.403)Zn_(0.597)等。在最优参数下AlSi5药芯焊丝作为填充金属的焊接接头抗拉强度平均值可达130.6 MPa,而AlSi12作为填充金属时抗拉强度平均值仅可达106.6 MPa。
Using AlSi5 flux-cored wire and AlSi12 flux-cored wire as filler metal,CMT welding-brazing was used to connect 5086 aluminum alloy and Q235 steel.The macroscopic morphology,microstructure and mechanical properties of the brazed joint under different welding wire compositions and different parameters were studied.The results show that the formed intermetallic compound layer when the AlSi5 flux-cored wire is used as the filler metal is thicker than that formed by the AlSi12 flux-cored wire,which indicates that the Si element can inhibit the formation of the intermetallic compound layer.The fracture analysis through EDS and XRD reveals that Fe_(2)Al_(5) and AlMg_(4)Zn_(11) are formed when the AlSi5 flux-cored wire is used as the filler metal,and Fe_(4)Al_(13),Al_(6)CuMg_(4),Al_(0.403)Zn_(0.597) are mainly formed when the AlSi12 flux-cored wire is used as the filler metal.Under the optimal parameters,the average tensile strength of welded joint when AlSi5 flux-cored welding wire is used as filler metal can reach 130.6 MPa,while the average tensile strength of welded joint when AlSi12 is used as filler metal can only reach 106.6 MPa.
作者
邵志洋
张超
林一鸣
谭志育
SHAO Zhiyang;ZHANG Chao;LIN Yiming;TAN Zhiyu(College of Material Science and Engineering,Jiangsu University of Science and Technology,Zhenjiang 212000,China;Jiangsu Urban and Rural Construction College,Changzhou 213000,China)
出处
《热加工工艺》
北大核心
2022年第1期114-119,共6页
Hot Working Technology
