Experimental study of Cu/Fe underwater self-constrained explosive welding tube

In this study, copper/steel composite tubes were produced by an underwater explosive welding process. Scanning electron microscopy, energy dispersive spectroscopy, electron backscatter diffraction and hardness tests were performed to analyse the microstructure and properties of the composite tubes. It was shown that by using an aqueous medium as a constraint, the inner tube cladding surface could be protected, shape distortion was reduced and the stringent requirements on the outer steel die were reduced. The results show that the copper/steel bond interface has a high-strength fine grain layer and that work hardening occurs near the interface after tube lamination.

Automated summary

Copper/steel composite tubes were produced using an underwater explosive welding process in this study. The results showed that the aqueous medium as a constraint helped protect the inner tube cladding surface, reduce shape distortion, and lower the stringent requirements on the outer steel die. Additionally, a high-strength fine grain layer was observed at the copper/steel bond interface, with work hardening occurring near the interface after tube lamination.