The cold-rolled It is an industrial process that involves the continuous, high-speed deformation of metallic materials, generally steel, as well as iron, aluminum, copper, and their various alloys. It is carried out at room temperature, which makes it possible to recrystallization of metal.
This metal forming technique It helps us reduce the thickness of the material and make it more uniform, which we achieve by passing it between one or more pairs of rollers. Cold rolling allows us to enhance its mechanical properties (elasticity, tensile strength, hardness, etc.).
Differences Between Cold and Hot Rolling
The main difference we found between these two types of profile rolling is the temperature at which they are carried out. In hot rolling, we work with temperatures ranging from between 0.3 and 0.5 times the melting point. When it comes to steel, temperatures can reach as high as 1,700 degrees Celsius.
With cold rolling, we achieve more uniform finishes, as well as stronger and less porous structures. However, when we treat the metal at high temperatures, we achieve greater corrosion resistance.
Advantages and Disadvantages of Cold Lamination
The cold-rolled It gives us more comprehensive control over the final result, making it the most suitable process for the manufacturing of small parts, which require a fine, precise finish. In addition, it offers other advantages that are just as important:
- Enhances the properties of metals.
- The durability and the service life of the parts.
- It offers improved machinability
- It allows for a high degree of dimensional tolerance.
- Guarantees surface finishes Uniform, plain, shiny, and of considerable quality.
- It provides greater firmness and elasticity.
- Improve the mechanical properties of metal.
In summary, this process is essentially a hot-rolling process that has undergone an additional forming step. Because the material loses its ductility, it is advisable to anneal it afterward. In addition, there are other disadvantages associated with rolling at room temperature:
- The corrosion resistance decreases.
- It only accepts square, flat, and round shapes.
- It can cause the material to anisotropic behavior, that is, their basic properties (conductivity, elasticity, etc.) vary.
- There is a risk that the following may occur: deformations, hence the need for annealing.
Main Applications of Cold Rolling
Because the mechanical properties of cold-rolled sheet metal are better than when it is processed at high temperatures, It has numerous applications. Thus, we can see that it is essential in sectors such as the manufacture of household appliances, electrical products, precision instruments, the food industry, the automotive sector, aviation, rolling stock, and transportation.
Through this process, we can manufacture all kinds of parts that require high precision. Thus, we see that it is used, for example, in canned goods and other pressurized containers, sheet metal and other automotive parts (such as exhaust pipes), metalwork, tools, gears, anchors, machine bolts… It is also used in other applications in the healthcare and construction sectors.
For gain more specific knowledge about the cold-rolled And when it comes to the materials used in sectors such as construction, it is important that we opt for a quality training; for example, the master's degree in Construction Materials and On-Site Quality Control that we offer at Structuralia, a degree program offered by the University of Alfonso X the Wise. Thanks to this master’s program, which is divided into four modules, we will stay up to date on the most commonly used materials, as well as the new ones that are emerging and will eventually become the standard.
