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为了提高钛/不锈钢扩散连接接头性能,缩短连接时间,抑制界面反应产物的过度生长,本文采用50μm纯铜箔做中间层,进行脉冲加压扩散连接。通过扫描电镜观察、万能拉伸试验和XRD分析对钛/铜/不锈钢接头界面组织和力学性能进行了分析。结果表明,当连接时间为120 s时即可得到可靠的接头。在钛/铜界面生成了Ti2Cu、Ti Cu、Ti3Cu4和Ti Cu4等金属间化合物层,而在铜/不锈钢界面生成了Fe-Cu固溶体。在拉伸载荷下,试样沿钛/铜界面反应产物发生脆性断裂,接头强度达到了340 MPa。
In order to improve the performance of the titanium / stainless steel diffusion connector, shorten the connection time and inhibit the excessive growth of the interface reaction products, a 50μm pure copper foil was used as an intermediate layer for pulse pressure diffusion connection. The microstructure and mechanical properties of titanium / copper / stainless steel joints were analyzed by scanning electron microscopy, universal tensile test and XRD analysis. The results show that a reliable joint is obtained when the connection time is 120 s. Ti2Cu, TiCu, Ti3Cu4 and TiCu4 intermetallic compounds were formed on the Ti / Cu interface and Fe-Cu solid solution was formed on the Cu / stainless interface. Under tensile load, the sample brittle fracture along the Ti / Cu interface reaction product, the strength of the joint reached 340 MPa.