Supervisor:
Southwest Ordnance Industry Bureau
Organizer:
Chongqing Ordnance Industry Society
Chongqing University of Technology
Chongqing University of Technology
Effect of heat treatment on copper/steel explosive composites
| DOI: | 10.11809/bqzbgcxb2023.04.029 |
| Keywords: | explosive cladding; T2/316L; interface morphology; shear strength; tensile strength |
| Abstract: | T2/316L copper steel composite is prepared by explosive welding, and its mechanical properties are tested. Through the analysis of metallographic structure, element distribution and SEM at the interface, this paper studies the explosive welding mechanism of the copper steel composite and the effect of heat treatment on the copper steel composite. The results show that the tensile strength of the copper steel composite in the explosive state is about 336.6 MPa, and the shear strength is about 183 MPa. After heat treatment at 620 β for 20 hours, the tensile strength is about 224.6 MPa, and the shear strength is about 131 MPa. The tensile specimens in both states break at the copper side. The special wavy structure of explosive welding forms at the interface of copper and steel. The grains at the explosive interface are stretched and broken to become small, and the grains on both sides of the interface recover to grow after heat treatment. There is no element diffusion on both sides of the interface, and there is metal melt in the vortex at the interface, mainly including Cr, Fe, Ni and Cu elements. |
| Issue: | Vol. 44 No. 4 (2023) |
| Published: | 2023-04-28 |
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