Interface characterization and mechanical properties of dual beam laser welding-brazing Al/steel dissimilar metals
Interface characterization and mechanical properties of dual beam laser welding-brazing Al/steel dissimilar metals
复制标题
双束激光焊-钎焊铝/钢异种金属的界面表征和机械性能
DOI：
10.1016/j.jmapro.2019.03.005
复制
发表时间：
2019-04
影响因子：
6.2
通讯作者：
Lu Fenggui
中科院分区：
文献类型：
--
作者：
Yuan Rui;Deng Shengjie;Cui Haichao;Chen Yunxia;Lu Fenggui
采用双光束激光焊接方法成功地实现了DP590钢与AA7075铝合金的搭接连接。通过引入导出的激光光束，较好地改善和控制了金属间化合物(IMC)层的润湿角、润湿距离和厚度。结果表明，铝液在钢表面的润湿性随激光功率的增大而提高，即当激光功率从1.0 kW增加到1.6 kW时，润湿角从25.3°减小到17.8°，润湿距离从2.17 mm增加到3.19 mm。η相(Fe2Al5)和θ相(FeAl3)是两种金属间化合物，一种是靠近钢侧的扁平组织，另一种是靠近焊锡焊缝的针状组织。随着激光功率从1.0 μkW增加到1.6 μkW，IMC层厚度从8.37 m增加到12.12 m。拉伸试验表明，润湿性和IMC厚度对焊钎焊接头强度均有影响。较差的润湿性和过厚的IMC层会导致较低的强度，导致钎焊界面发生断裂。当激光功率为1.4kW时，接头抗拉强度最高，平均为123.7 。
The DP590 steel to AA7075 Al-alloy with lap configuration is successfully joined by dual beam laser welding-brazing without using filler metal. Through the introduction of the derived laser beam, the wetting angle, wetting distance and the thickness of intermetallic compound (IMC) layer are well improved and controlled. It is found that the wettability of liquid Al on steel improves with the increase of laser power, i.e. the wetting angle decreasing from 25.3° to 17.8° and the wetting distance increasing from 2.17 mm to 3.19 mm as the laser power increasing from 1.0 kW to 1.6 kW. Two kinds of IMC exist at brazing interface, one is η-phase (Fe2Al5) with flatten morphology closing to the steel side and the other is θ-phase (FeAl3) with needle-like morphology adjacent to the welding-brazing seam. The thickness of IMC layer increases from 8.37 μm to 12.12 μm with increasing laser power from 1.0 kW to 1.6 kW. Tensile test shows that both the wettability and the IMC thickness have influence on the welding-brazing joint strength. Poor wettability and too thick IMC layer will result in lower strength and fracture occurred in brazing interface. The optimal joint tensile strength of 123.7 MPa on average is achieved with the laser power of 1.4 kW.
登录
查看更多内容
焊后热处理对铝合金与不锈钢异种金属接头的影响
DOI：
10.1016/j.msea.2012.04.110
发表时间：
2012-07
影响因子：
6.4
作者：
Dong, Honggang;Liao, Chuanqing;Yang, Liqun;Dong, Chuang
通讯作者：
Dong, Chuang
DOI：
10.1016/j.msea.2009.02.036
发表时间：
2009-05
影响因子：
6.4
作者：
Jianling Song;Sanbao Lin;Chaozhi Yang;G. Ma;Huijie Liu
通讯作者：
Jianling Song;Sanbao Lin;Chaozhi Yang;G. Ma;Huijie Liu
影响因子：
6.3
作者：
Jian Lin;N. Ma;Y. Lei;H. Murakawa
通讯作者：
Jian Lin;N. Ma;Y. Lei;H. Murakawa
DOI：
10.1007/s11661-008-9523-4
发表时间：
2008-05
期刊：
Metallurgical and Materials Transactions A
影响因子：
--
作者：
Y. Chen;K. Nakata
通讯作者：
Y. Chen;K. Nakata
DOI：
10.1016/j.msea.2013.04.097
发表时间：
2013-08-20
影响因子：
6.4
作者：
Su, Yongchao;Hua, Xueming;Wu, Yixiong
通讯作者：
Wu, Yixiong