模板采用冷金属过渡(CMT)焊接工艺,以ER4043铝硅焊丝作为焊缝填充金属对AZ31镁合金和6061铝合金进行对接,焊接过程稳定,焊缝成型良好.利用光学显微镜、扫描电镜、能谱和X射线衍射等表征方法,对接头的组织、成分和相组成等进行了分析.结果表明:填充金属与铝母材界面结合良好,与镁母材联生结晶,晶粒长大形成均匀分布的柱状晶,为α镁基固溶体和γ(Mg17Al12)的共晶组织,镁侧熔合区生成了Mg17Al12、Mg2Al3、Mg2Si金属间化合物.力学性能测试表明:镁侧熔合区的显微硬度值较高,该处生成了脆硬的金属间化合物;断裂均发生在镁侧熔合区,属于脆性断裂.断裂的主要原因是镁侧熔合区生成了大量的Mg2Si、Mg17A112和Mg2Al3金属间化合物.
参考文献
| [1] | Feng J C;Wang Y R;Zhang Z D .[J].中国有色金属学报,2005,15(02):165. |
| [2] | Kwon Y J;Shigematsu I;Saito N .[J].Materials Letters,2008,62:3827. |
| [3] | Zeng R C;Ke W;Xu Y B .[J].Acta Metallurgica Sinica,2001,37(07):673. |
| [4] | Larsson J K .[J].Welding Research Abroad,2003,49(06):29. |
| [5] | Liu P;Li Y J;Geng H R et al.[J].Materials Letters,2007,61:1288. |
| [6] | Shang J;Wang K H;Zhou Q et al.[J].Materials & Design,2012,34:559. |
| [7] | Liu L M;Tan J H;Zhao L M et al.[J].Materials Characterization,2008,59:479. |
| [8] | Pickin C G;Williams S W;Lunt M .[J].Journal of Materials Processing Technology,2011,211:496. |
| [9] | Zhang, HT;Feng, JC;He, P;Zhang, BB;Chen, JM;Wang, L .The arc characteristics and metal transfer behaviour of cold metal transfer and its use in joining aluminium to zinc-coated steel[J].Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing,2009(1/2):111-113. |
| [10] | Ben-Artzy A;Stern A;Frageand N et al.[J].Science and Technology of Welding and Joining,2008,13(04):402. |
| [11] | Wang J;Feng J C;Wang Y X .[J].Materials Science and Technology,2008,24(07):827. |
| [12] | Liu L M;Ren D X .[J].Materials & Design,2011,32:3730. |
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%