Roll bonding

Roll bonding is a solid state welding process that involves the use of rolling mill machinery to bond together two or more layers of different metals. This process is commonly used in the metallurgy industry to create composite materials with unique properties.

Process

The roll bonding process begins with the cleaning of the metal surfaces to be bonded. This is typically done using a combination of mechanical cleaning methods and chemical cleaning solutions to remove any surface contaminants that could interfere with the bonding process.

Once the surfaces are clean, the metals are stacked together in the desired order and then passed through a rolling mill. The pressure exerted by the rolling mill causes the metal layers to plastically deform, creating a metallurgical bond between them.

The resulting composite material can then be further processed as needed, such as by heat treatment to improve its mechanical properties, or by machining to achieve the desired final shape.

Applications

Roll bonding is used in a wide range of applications, including the production of clad metals for use in cookware, electrical connectors, and aerospace components. It is also used to create bimetallic strips for use in thermostats, and to produce multilayer printed circuit boards.

Advantages and Disadvantages

The main advantage of roll bonding is that it allows for the creation of composite materials with a wide range of properties, by combining different metals in a single material. It also allows for the production of large quantities of material in a relatively short amount of time.

However, roll bonding also has some disadvantages. For example, it requires a high degree of control over the rolling process to ensure a good bond between the metal layers. It also requires the use of relatively expensive rolling mill machinery.

See Also

• Cladding (metalworking)
• Explosion welding
• Diffusion bonding