研究了Ti3Al基合金真空钎焊及接头组织性能;分析了不同钎料对接头界面组织和剪切强度的影响,初步优选了钎料,优化了钎焊连接规范参数;利用电子探针、扫描电镜和X射线衍射等方法对接头进行了定性和定量分析.结果表明:采用NiCrSiB钎料连接时,在界面处有金属间化合物TiAl3、AlNi2Ti和Ni基固溶体生成,TiAl3和AlNi2Ti的生成降低了接头的剪切强度;采用TiZrNiCu钎料连接时,在界面处有金属间化合物Ti2Ni、Ti(Cu,Al)2和Ti基固溶体生成,Ti2Ni和Ti(Cu,Al)2的形成降低了接头的剪切强度;采用AgCuZn钎料连接时,在界面处生成TiCu、Ti(Cu,Al)2和Ag基固溶体,TiCu和Ti(Cu,Al)2的生成是降低接头剪切强度的主要原因;采用CuP钎料连接时,在界面处生成了Cu3P、TiCu和Cu基固溶体,CuaP和TiCu使接头的剪切强度降低;对于NiCrSiB钎料,当连接温度为1 373 K,连接时间为5 min时,接头的剪切强度最高为219.6 MPa对于TiZr-NiCu钎料,当连接温度为1 323 K,连接时间为5 min时,接头的最高剪切强度为259.6 MPa;对于AgCuZn钎料,当连接温度为1 173 K,连接时间为5 min时,接头的最高剪切强度为125.4 MPa;对于CuP钎料,当连接温度为1 223 K,连接时间为5 min时,接头的最高剪切强度为98.6 MPa;采用TiZrNiCu钎料连接Ti3Al可获得最大接头强度.
参考文献
| [1] | 张蕾蕾,陈达,林栋梁.TiAl 金属间化合物研究现状及发展趋势[J].材料开发与应用,1995(05):44. |
| [2] | Westbrook J H;Fleischer R L.Ti3Al and its alloys,intermetallics compounds, principles and practice[J].Joining and Welding,1995(02):91-131. |
| [3] | 邹敦叙;李世琼;仲增墉 .航天航空理想新材料Ti3 Al和TiAl金属间化合物合金研究开发进展[J].钢铁研究学报,1997,9(zk):32-37. |
| [4] | Ridley N;Livesey D W;Salehi M T.Superplastic behavior and diffusion bonding of a titanium aluminide alloy[A].London:Oxford University,1991:198-200. |
| [5] | Cox A;Baeslack W A Ⅲ;Zorko S.Resistance diffusion bonding of a titanium aluminide[A].Cranfield:Osaka University,1990:395-398. |
| [6] | Baeslack W A Ⅲ;Mascorella T J;Kelly T J.Weld ability of a titanium aluminide[J].Welding Journal Research Supplement,1989:483s-498s. |
| [7] | Baeslack W A Ⅲ;Threadgill P L;Nicholas E D .Linear friction welding of α2 titanium aluminides[R].TWI Research Report,1995. |
| [8] | Gould J E;Stotler T V.Application of flash welding to a titanium aluminide alloy-micro structural evaluations[A].Germany,1991:123-124. |
| [9] | Baeslack W A Ⅲ;Cielack M J;Headley T J .Structure, properties and fracture of pulsed Nd: YAG laser welded Ti-14. 8wt% Al-21.3wt% Nb titanium aluminide[J].Scripta Materialia,1988,22(07):1155-1160. |
| [10] | Baeslack W A Ⅲ.Joining of α2 titanium aluminides,proceedings symposium weldability of materials[A].Detroit: Detroit University,1990:247-258. |
| [11] | Strychor R;Williams J C;Soffa W A .Phase transformations and modulated microstructures in Ti-Al-Nh allovs[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1988,19:225-229. |
| [12] | 刘博;崔约贤.Ti3Al-Nb基合金的焊接性研究进展[J].宇航材料工艺,1997(05):1-6. |
| [13] | 吴斌 .Ag-Cu-Ti钎料活性钎焊Si3N4陶瓷的研究[J].华东船舶工业学院学报,1998,12(02):74-79. |
| [14] | Bank .Interfacial reaction between alumina and Cu-Ti filler metal during reaction metal brazing[J].Welding Journal,1994,73(03):54-57. |
| [15] | LEE S J;Wu S K .Infrared joining strength and interfacial microstructures of Ti-48Al-2Nb-2Cr intermetallies using Ti-15Cu-15Ni foil[J].INTERMETALLICS,1999,7:11-21. |
| [16] | Toshimitsu T .Effects of brazing filler on properties of brazing joints between TiAl and metallic materials[J].Intermetallics,2001,9:253-260. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%