(哈爾濱工業(yè)大學(xué)金屬精密熱加工國(guó)防科技重點(diǎn)實(shí)驗(yàn)室， 哈爾濱 150001)
摘 要: 通過(guò)OM，SEM，XRD，EDS，EPMA等分析測(cè)試手段，對(duì)采用Cu箔作中間夾層的TB2擴(kuò)散焊界面組織、反應(yīng)相生成及其生長(zhǎng)規(guī)律進(jìn)行了分析。依照Cu-Ti二元相圖，選擇擴(kuò)散焊溫度分別為1123 K, 1173 K和壓 力為5MPa，經(jīng)30，60，120min擴(kuò)散焊后，Cu與Ti分別生成Cu3Ti2，CuTi，CuTi3，這三者都硬而脆，尤其是CuTi3的生成使界面的剪切性能嚴(yán)重惡化。
關(guān)鍵字: 鈦合金；銅箔；擴(kuò)散焊；界面
（National Defense S and T Key Laboratory of Metal Precision Hot Processing,
Harbin Institute of Technology,Harbin 150001, P.R.China）
Abstract:The interfacial microstructure, the growth of reaction phases and the growth regularities of TB2 diffusion welding were analyzed by OM, SEM, XRD, EDS and EPMA, when Cu foil was employed as the sandwiched layer between two TB2 specimens. According to the binary phase diagram of Cu-Ti,the temperatures of diffusion welding were selected as 1123 and 1173 K, respectively. After diffusion welding for 30, 60 and 120 min with the diffusion welding pressure being 5 MPa, Cu and Ti reacted to form Cu3Ti2,CuTi and CuTi3, respectively, all of which are hard and brittle, especially CuTi3 makes the shear property of interface substantially degrade.
Key words: titanium alloys; copper foils; diffusion welding; interface
