The composite structures of TZM alloy and 30CrMnSiA steel have broad application prospects in nuclear power and aerospace industries, while the problem of the joint embrittlement has not been solved. Therefore, pure vanadium, which has excellent metallurgical compatibility with base materials is selected as the filler metal to produce high strength joints. Microstructures, mechanical properties, and TZM/FZ interfacial characteristics of the joints without V foil and with V foil were analyzed. The results indicate that: (i) there is a Fe₂Mo intermetallic compound layer along with the TZM/FZ interface without V foil, which will deteriorate the mechanical properties of the joint. After adding pure V foil, there is no reactive layer appearing at the TZM/FZ interface; (ii) the joint without V foil fractured along the interface between TZM and Fe₂Mo, the strength of which is only 165.2 MPa, while the tensile strength of the joint with V foil reaches 312.7 MPa; (iii) through calculating the interfacial ideal adhesion energy, it can be found that the interfacial bonding strength of the Mo(111)/V(Fe)_ss(111) interface is higher than that of the Mo(111)/Fe₂Mo(100) interface.

TZM合金和30CrMnSiA钢的复合结构在核电和航空航天领域具有广阔的应用前景，但尚未解决接头脆化的问题。因此，选择与基础材料具有优异冶金相容性的纯钒作为填充金属，以产生高强度的接头。分析了不带V箔和带V箔的接头的组织，力学性能以及TZM / FZ界面特性。结果表明：（i）有Fe ₂Mo金属间化合物层以及没有V箔的TZM / FZ界面，会降低接头的机械性能。添加纯V箔后，在TZM / FZ界面上没有出现任何反应层。（ii）沿TZM和Fe ₂ Mo的界面无V箔的接缝断裂，其强度仅为165.2 MPa，而具有V箔的接缝的抗拉强度达到312.7 MPa；（iii）通过计算界面理想粘附能，可以发现Mo（111）/ V（Fe）_ss（111）界面的界面结合强度高于Mo（111）/ Fe ₂ Mo （100）界面。