Noticias

Explosive welding is a high-energy processing method that integrates the mechanism of pressure welding, diffusion welding and fusion welding [9]. It can be seen from the "weldability window" that in the explosive welding process of metal clad plate, the cladding plate collides with the substrate driven by explosives, and the huge collision pressure acts on the interface of metal plate, and when the pressure is within a certain limit, the jet is generated between metal plates to form a wavy joint surface. Therefore, it is necessary to explore the change and distribution of cladding pressure. Considering that the explosive energy diffuses in the form of detonation wave, the unit pressures of the same radius and different radii on the cladding are compared and studied respectively.
 

 
Titanium / aluminum explosive welding composites shine in the field of military industry and aviation because of their excellent corrosion resistance of titanium, light specific gravity of aluminum alloy, good thermal conductivity and high bonding strength of welding interface. However, the titanium / aluminum explosive welding plates used in China's aerospace field still need to be imported from Japan, Russia, the United States and other countries. The reason is that the domestic research on titanium / aluminum explosive welding plates started late and the existing research results can not meet the needs of high-precision applications, which hinders the localization of China's aviation industry. Chalco aluminum uses emulsion explosive as explosive welding energy to composite multilayer steel plates. Through explosive welding, high nitrogen steel plate and copper plate were compounded to successfully prepare high nitrogen steel / copper double-layer metal plate.
 
 
1) Under the simulated conditions of 1.8 cm thick charge distribution and 0.4 cm plate spacing, by adding a transition layer 1060 pure aluminum plate between TA1 plate and 5052 aluminum alloy plate, the collision pressure and flight speed of the cladding can be effectively reduced, and the combination of the substrate and the cladding can be more stable.
 
2) In the metallographic test of TA1 / 5052 and TA1 / 1060 / 5052 explosive welding plates, it is found that the microstructure appearance of the bonding interface of the composite plate is periodic and uniform wavy structure, but the bonding between different metals leads to different waveform parameters.
 
3) Compared with TA1 / 5052 explosive welding plate, the tensile strength, elongation, area shrinkage and interfacial shear strength of TA1 / 1060 / 5052 composite plate with transition layer increased by 2%, 14.12%, 24.28% and 5.57%, respectively. The experimental results show that the addition of transition layer 1060 Aluminum plate can effectively improve the bonding quality of titanium / aluminum composite plate, which is consistent with the numerical simulation results.