Definition and Principle of Explosion Welding
Intermetallic welding utilizes explosives as the energy source, employing the detonation energy to cause the welded metal surfaces to collide at high velocity and at an angle. This process induces plastic deformation, controlled melting, and mutual atomic diffusion, ultimately forming a metallurgical bond during the welding procedure.
The Development History of Explosion Therapy
The phenomenon of explosion welding was observed on shrapnel and targets, with its earliest documentation attributed to Carl from the United States. In 1957, in the Czech Republic,it was successfully achieved explosion welding of aluminum and steel. Systematic research began internationally in the 1950s, and by the mid-1960s, countries such as the United States, the United Kingdom, and Japan had initiated both experimental and commercial production. China commenced experimental research in 1963 and began commercial production in 1968.
Features of Explosion Welding
It enables rapid and robust welding of homologous or heterologous metal materials; the process is simple and easy to master; requires no specialized facilities, large-scale equipment, or substantial investment; supports spot welding, wire welding, and surface welding (explosive bonding), yielding large-area composite plates, tubes, rods, and custom-shaped components; employs low-explosivity mixed explosives as the energy source, which are cost-effective, readily available, safe, and user-friendly.
Metal combinations suitable for explosive blasting applications
The figure below provides an intuitive overview of which metal combinations have been experimentally validated in the explosion welding process, offering valuable reference for professionals working in this field when selecting metal material combinations.
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