1Cr18Ni9Ti不锈钢/ Ti6Al4V钛合金真空钎焊工艺研究
Vacuum Brazing of 1Cr18Ni9Ti Stainless Steel and Ti6Al4V Titanium Alloy
祁 凯1， 于治水2， 李瑞峰1
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作者单位：1.江苏科技大学 材料科学与工程学院， 江苏 镇江 212003； 2.上海工程技术大学 材料工程学院， 上海 201620
中文关键字：钛合金； 不锈钢； 真空钎焊； Ag-Cu-Ti钎料。
英文关键字：titanium alloy; stainless steel; vacuum brazing; Ag-Cu-Ti brazing filler
中文摘要：采用Ag-Cu-Ti钎料进行Ti6Al4V(TC4)钛合金和1Cr18Ni9Ti不锈钢的真空钎焊，观察分析了其在钎焊温度为790～870 ℃和保温时间为1和3 min时钎缝界面微观组织和成分分布。研究结果表明，钎缝宽度随着钎焊温度的升高而降低，随着保温时间的增加而增加；扩散层厚度随着保温时间的增加而增加。Ti是焊缝中反应物多少的决定因素。在钎焊温度790 ℃，保温3 min时能得到较好的焊缝组织，界面无裂纹出现。
英文摘要：Ti6Al4V titanium alloy and 1Cr18Ni9Ti stainless steel was vacuum brazed using Ag-Cu-Ti as filler. The interfacial microstructure and element distribution was studied at 790℃～870 ℃ for 1min and 3min, respectively. The results show that the width of seam decreases with the increase of brazing temperature and increases with the increase of holding time, however, the width of the diffusion layer increases with the increase of brazing temperature. Element Ti determines the formation of inermetallic compounds. The optimal interfacial microstructure can be obtained when brazing at 790 ℃ for 3 min, no cracks are found in the brazed joint.