Experimental study of Cu/Fe underwater self-constrained explosive welding tube
Qichao Tian, Yang Ming, Junfeng Xu, Honghao Ma, Yang Zhao, Zhaowu Shen, Zhiqiang Ren, Heng Zhou
Abstract
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.