Research on titanium-copper explosive welding interface with different welding parameters

Vortex holes at the welding interface will affect the interface sealing performance of the explosive welding clad plate, so in the production process to choose the appropriate parameters to avoid the production of vortex holes. The step method is used to study the titanium-copper explosive welding clad plate interface vortex holes generation and interface ripple morphology change law under different stand-off distances. Experimental results show that the shear strength of the welding interface, the wavelength and amplitude of the ripple are positively correlated with the stand-off distance. The closer to the interface, the greater the hardness; the presence of dislodged metal blocks in the melt zone leads to no significant increase in hardness. When the stand-off distance is 4 mm ( β =16^∘ ,V_p=779m/s ), the least amount of intermetallic compounds is generated at the interface. When the stand-off distance is not more than 8 mm ( β≤ 19^∘ ,V_p≤ 947m/s ), there are no vortex holes on the interface. The welding process is simulated by the smooth particle hydrodynamics method in AUTODYN. The numerical simulation results show that the main component of the jet is titanium; numerical simulation can well predict the ripple shape of the welding interface.