Explosion cladding is a process wherein a cladding plate is positioned over the backer plate with a small gap. Specially made explosives are spread on top of the cladding plate. On detonation, the cladding plate is accelerated towards the backer plate and collides with it at a high velocity. This collision takes place progressively from one end of the plate to the other in microseconds.
This acceleration causes a unique phenomenon of progressive turbulence at the interface and removes the contaminating surface films like oxides and gases, creating a strong metallurgical bond at the collision point of the two surfaces. The thickness of explosive layer, its propagation characteristics as well as stand off distance and the collision angles are carefully controlled to produce uniform and strong metallurgical bonding all over the plate. It is basically a solid-state pressure bonding process.
I. Metal Combinations
Cladding on both sides of a backer metal with the same/different cladding metal is possible. Even multilayered clad composites are possible.
Certain EXPLOWELD clad products can be further rolled/extruded into thinner gauges and can be considered when technically feasible and quantities are adequate.
In case your requirement does not fit into the above range, we can, together, find a solution. Please do not hesitate to contact us.
II. Advantages of Clad Products
- Guaranteed strong Metallurgical bonds
- Wide range of metal combinations
- Economic use of scarce and dearer metals
- Wide range of sizes and composite thicknesses
- Custom made products
- Adoption of conventional fabrication procedures
- Extremely low electrical resistance at interface.
- Retention of individual metal properties
- Good heat transfer
- Short processing times.
III. Product & Uses
CLAD PLATES manufactured by Explosion Cladding Process
FOR FABRICATION OF PROCESS EQUIPMENT:
Clad plates over the years have become the favoured material of construction for equipment with most designers and fabricators. Clad plates offer a cost effective solution even for the most demanding applications.
|Fig: (CS + SS304L) Clad dish ends||Fig: (CS + Naval Brass) Clad tube sheet||Fig: (CS + HASTELOY C-22) Clad tube sheet duly drilled|
EXPLOSION CLAD ELECTRICAL TRANSITION JOINTS
APPLICATIONS: EXPLOWELD electrical transition joints are widely used in the electrochemical industries like chlor-alkali and electrometallurgical industries such as Aluminium Smelters, zinc electrolysis apart from electrical contacts.
Fig: (Copper + Al) clad transition joints used in Zinc Smelters
EXPLOSION CLAD STRUCTURAL TRANSITION JOINTS:
A major area of application of explosion bonded transition joints is in structures consisting of dissimilar metals. Structural transition joints may be either flat or tubular jointsÂ for effecting permanent, strong, crevice-free and leak proof metallurgical weld between dissimilar metals and alloys.
The different areas of applications and most standard products offered are as below:
SHIP BUILDING & SHIP REPAIR YARDS
Fig: (Al + Titanium + Steel) clad transition joints used in Aluminum Smelters
We at TEMA are committed to excellent quality and customer service. We have a well established Quality assurance system in place where a documented procedure is adopted. Furthermore our EXPLOWELD clad plates have met the ASME/ASTM requirements and been certified by all reputed inspection agencies.