采用YLS-6000型光纤激光器对可伐合金4J29与钼组玻璃DM308进行激光焊接，研究了中间层对接头强度、界面结构和界面结合机理的影响，分析了界面元素的扩散行为. 结果表明，Mo-Mn-Ni中间层可以减少接头边缘较大的裂纹，Ni2O3-MnO2-B2O3中间层可以减少玻璃侧的微裂纹和气泡数目；4J29/DM308激光焊接头承载能力最弱的部位为靠近玻璃侧，穿过气泡发生断裂，Mo-Mn-Ni中间层接头的抗剪切强度最大为10.96 MPa，Ni2O3-MnO2-B2O3中间层接头抗剪切强度最大值为13.46 MPa；Ni2O3-MnO2-B2O3中间层接头界面过渡层的厚度大约为30 ~ 40 μm，过渡层存在明显的枝晶生长，接头界面XRD相分析结果表明，界面过渡层为Fe和Si立方晶系的复合氧化物FeSiO3和Fe7SiO10，接头界面EDS分析结果表明，Fe，Co，Ni等元素在整个界面区域内发生了扩散融合，界面结合主要靠化学反应和元素扩散连接.
贾林
,
栗卓新
,
李红
,
Wolfgang Tillmann
. 中间层对可伐合金4J29/钼组玻璃DM308激光焊接接头结合性能的影响[J]. 焊接学报, 2018
, 39(11)
: 33
-38
.
DOI: 10.12073/j.hjxb.2018390268
Kovar alloy and DM308 glass were bonded with YLS-6000 fiber laser. The effect of interlayer on the strength, interface structure and interface bonding mechanism was investigated. The diffusion behavior of interface elements is analyzed. The results showed that the Mo-Mn-Ni interlayer can reduce the cracks at the edge of the joint,and Ni2O3-MnO2-B2O3 interlayer can reduce the number of micro cracks and the number of bubbles on the glass side. The weakest part of the 4J29/DM308 laser welding joint is near the glass side, which breaks through the bubble. The biggest shear strength of Mo-Mn-Ni interlayer joints is 10.96 MPa. The biggest shear strength of Ni2O3-MnO2-B2O3interlayer joints is 13.46 MPa. The thickness of Ni2O3-MnO2-B2O3 interlayer transition layer is about 30-40 μm. There is obvious dendrite growth in the transition layer. The results of joint interface XRD phase analysis show that the interface transition layer is FeSiO3 and Fe7SiO10. It is belong to Fe and Si cubic complex oxides. The results of EDS analysis showed that Fe, Co, Ni, Al, Na and Si elements had diffused in the whole interface region. The interfacial bonding mainly depends on chemical reaction and element diffusion.
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