Explosive Welding Technology for Composite Tube Sheets

Explosive welding of composite tube sheets utilizes explosive detonation to drive dissimilar metals into high-speed collision, achieving atomic-level metallurgical bonding, particularly suitable for conventionally difficult-to-weld materials such as titanium/steel. This technology precisely controls the detonation velocity (typically 2000-2500m/s) and charging parameters to form a micro-wavy interface, avoiding the formation of brittle compounds.

The core of the process includes cladding plate welding (mainly argon arc welding), base plate surface polishing, and gap spacer positioning, which must be carried out in remote locations to reduce safety risks. A single explosion can complete the simultaneous welding of multiple tubes, increasing efficiency by more than 5 times compared to traditional tube expansion processes.

After the explosion, ultrasonic testing (bonding rate ≥99%), heat treatment (such as annealing of titanium/steel composite plates), and leveling are required. The final product is used in corrosion-resistant and high-pressure applications such as heat exchangers and chemical containers.