Metal rolling process

Metal rolling is a mechanical manufacturing process used to reduce the thickness of a metallic material by passing through opposing rollers. This process is commonly used to obtain plates, sheets or belts of uniform thickness and desired dimensions.

How does the metal rolling process work?

The first step is the preparation of the material. The metal, generally in the form of ingots, is heated in order to make it malleable and facilitate processing. At this point, a first rolling takes place, called primary rolling, during which the preheated metal passes through rolling rollers which apply pressure in order to roughly reduce its thickness.

Subsequently, we proceed with a second rolling where the previously rolled metal is passed through another series of rolling rollers so as to further reduce the thickness until the desired dimensions are reached.

Once the metal rolling phases have been completed, the material is cooled and subjected to surface treatments, cutting and any other finishings to obtain the final product.

What are the advantages and applications of metal rolling?

As already mentioned, the most important advantage of the metal rolling process is the obtaining of materials with steady thicknesses and precise and uniform dimensional tolerances, therefore suitable for a large variety of industrial applications. Furthermore, metal rolling guarantees the improvement of the mechanical properties of the material such as resistance, hardness, and ductility.

Steel rolling

Steel rolling is widely used in the steel industry for the production of metal sheets for construction, automobiles, household appliances and more. The process produces steel plates of various sizes and thicknesses with uniform mechanical properties to ensure optimal performance.

Steel is one of the most used metals in rolling for several reasons. First of all, it is a versatile metal as, thanks to its flexibility, it can be laminated in different thicknesses and shapes to best adapt to the type of application for which it is to be used. Furthermore, rolling steel improves its mechanical strength and durability, making it ideal for applications where strength is essential, such as in the automotive and construction industries.

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How many types of metal rolling are there?

There are different types of metal rolling, each designed to adapt to the specific needs of each process and material.

Hot rolling

Hot rolling is a fundamental process in metalworking that involves the plastic deformation of a material at elevated temperatures. This process is widely used in the production of plates, bars and beams. There are subcategories of hot metal rolling:

Continuous Rolling: The material is continuously fed through a series of rolling rolls without interruption, typically used to produce steel plates.

Semi-Continuous Rolling: A process similar to continuous rolling, but with cooling intervals or intermediate treatments between rolling steps.

• Block Rolling: Used for large ingots or blocks, the material is processed in successive steps to reduce the thickness and obtain sheets or bars.

Cold rolling

Cold rolling is a metalworking process that involves the plastic deformation of a metallic material at room or slightly higher temperatures. This method is used to further reduce the thickness of hot rolled metals, improve the surface finishing and modify the mechanical properties of the material.

What is a rolling mill and how is it made up?

A rolling mill is a complex industrial structure designed to carry out the rolling of metals. These structures are made up of a series of essential components that work together to reduce the thickness of the metal material and shape it to the desired specifications.

Main Components of a Rolling Mill

1. Feeding Line: The raw material is fed into the production line to start the rolling process.

2. Heating Furnaces: The rolling metal is preheated to high temperatures to make it malleable before starting the process.

3. Rolling Mill: A rolling mill consists of a series of rollers, including input rollers, rolling rollers and output rollers, which apply pressure on the material to reduce its thickness.

4. Roll Feeding System: A complex system that manages the continuous feeding of material through the rolling rolls.

5. Cooling System: After rolling, the material is cooled rapidly or slowly as needed to control its mechanical properties.

6. Control and Measurement Devices: Sensors, measurement instruments and control systems that monitor and regulate temperature, pressure, and other critical variables during the rolling process.

7. Transport and Storage System: Once rolling is completed, the material is transported and stored in an appropriate manner to be ready for use or, possibly, to be subjected to further processing or heat treatments.

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Protect metal during rolling with ATP products

If you deal with metal rolling, you will know how important it is to use protective products during the entire manufacturing process. ATP has designed protective coatings for metals in order to guarantee optimal protection from the early stages, avoiding possible damage caused by phenomena such as oxidation and decarburization. Additionally, our boron nitride coatings enhance the machinability and lubricity of metals to make the rolling process more efficient.

If you have doubts or questions about ATP products, contact us via form, email or by phone. We are always available to give you more information and advise you on the protective coating best suited to your needs!