采用 TIG 电弧钎焊试验方法，主要研究了电流大小、电弧加热时间以及弧长对 AlSi5钎料在镀锌钢板上润湿铺展及界面行为的影响。实验结果表明：随着电流、燃弧时间和某一范围内弧长的增加，钎料在镀锌钢板上的润湿角逐渐减小，铺展面积逐渐增加，并在某一特定范围时润湿铺展性能达到最佳；随着燃弧电流的增加，界面金属间化合物的厚度呈现先增加后减小的趋势，靠近母材一侧有 Fe2 Al5相生成，钎料一侧则生成 FeAl3相；Al 元素扩散到界面处与 Fe 元素发生扩散反应形成 Fe-Al 金属化合物颗粒，在钎缝中弥散分布着 Si 元素，对钎缝有强化作用。
The spreadability and interfacial behavior of AlSi5 filler metal on galvanized steel was investigated under the condition of TIG arc heating at different welding parameters,including current,heating time and the arc length.The results showed that with the increase of heating time,current and a certain range of arc length,the wet-ting angle decreased and the spreading area increased,and the wettability and spreadability achieved the optimum at a certain range.With the increase of current,the thickness of intermetallic compound layer increased first and then de-creased,the intermetallic compound Fe2 Al5 was found close to the base metal and FeAl3 was formed inside of the fil-ler.Simultaneously,Al element diffused to the interface to form Fe-Al diffusing particles with steel element,and the joints were strengthened due to the solution of element Si.
参考文献
| [1] | 肖军.现代轿车全铝车身的研究进展[J].上海有色金属,2006(01):24-27. |
| [2] | 龙江岩 等.车辆轻量化与钢铝-体化结构新技术的研究进展[J].机械工程学报,2008,44(6):27. |
| [3] | 李亚江;王娟;刘强.有色金属焊接及应用[M].北京:化学工业出版社,2006 |
| [4] | 李亚江;王娟;刘鹏.异种难焊材料的焊接及应用[M].北京:化学工业出版社,2004 |
| [5] | 赵雪勃,杜安,吴海耀,王凤华.热镀Galfan合金界面层的生长动力学研究[J].河北工业大学学报,2011(05):70-73,77. |
| [6] | 林三宝,宋建岭.电弧钎焊技术的应用及发展[J].焊接,2007(04):19-21,36. |
| [7] | 于治水 .镀锌钢板氩弧钎焊润湿铺展及界面行为[D].哈尔滨工业大学,2003. |
| [8] | Gatzen M;Radel T;Thomy C et al.Wetting behaviour of eutectic Al-Si droplets on zinc coated steel substrates[J].Journal of Materials Processing Technology,2014,214:123. |
| [9] | Koltsov, A;Bailly, N;Cretteur, L .Wetting and laser brazing of Zn-coated steel products by Cu-Si filler metal[J].Journal of Materials Science,2010(8):2118-2125. |
| [10] | Tan C W;Li L Q;Chen Y B.Interfacial microstruc-ture and fracture behaviour of laser welded-brazed Mg alloy to zinc coated steel[J].Intermational Journal of Advanced Manufacturing Technology |
| [11] | Gatzen M;Radel T;Thomy C et al.The role of zinc layer wetting of aluminium on zinc-coated steel in laser brazing and welding[J].Phys Procedia,2014,56:730. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%