There are different types of heat treatments depending on the objective to be achieved and the reactions that are achieved are obviously also different. This type of treatment hardens or softens a product, modifies its structure or changes some of its characteristics so that the final result meets our needs.

The different heat treatments include carburizing, nitriding, tempering, carbonitriding, annealing, normalizing, isothermal annealing and quenching.

Tempering, the main treatment in the industry

Tempering is one of the most widely used heat treatments in the machining field. Basically, it consists of heating a material, usually steel, above its transformation point. We are talking about temperatures that may well exceed 800 or 900 degrees Celsius, and cool it quickly in water or oil. The purpose of this whole process is to obtain a much more resistant piece, in which its degree of fragility is reduced.

The tempering process seeks to achieve a balance between hardness and strength in the product.

Although it may seem strange, the use of tempered steel has been used for centuries. Already in feudal Japan, blacksmiths were in charge of making katanas, swords and other weapons with this material. To do this they smeared clay on specific parts of a steel blade and heated it in a forge, then cooled the blade in water.

Obviously today’s work processes have evolved, but at the core, the objective and principles remain the same.

Of course, steel is not the only metal that can be tempered, but it is one of the metals that offers the most possibilities, since by doing so, very attractive qualities can be achieved. For example, it is made to have a higher degree of hardness, to be less fragile, to withstand greater forces, to relieve stresses, etc.

How and why steel is hardened

To harden it, the steel must be heated to a temperature that exceeds its transformation point, which is called the quenching temperature. In this way it is possible to vary its structure, obtaining a crystalline structure that is ideal for rapid cooling of the piece. The cooling must be carried out in a certain way that will vary according to the composition of the steel in order to obtain the desired equilibrium.

To obtain different types of hardening , other elements such as carbon, nitrogen, cyanides or other compounds can be added.

The process of heating steel is called austenitization. What is achieved by heating it is to accommodate much more carbon in its structure, forming austenite, which is nothing more than a certain arrangement of iron and carbon atoms. Upon rapid cooling, martensite is formed, i.e., a crystal that gives the steel its maximum possible strength.

A complete part, including its core, can be hardened. Or only its external surface can be hardened, giving the core a different degree of hardness and flexibility.

In short, steel tempering provides this material with the properties we need to be able to manufacture parts that are resistant and suitable for the work for which they are intended, such as swas frames.

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SWAS is an acronym that refers to a steam and water analysis system. Certain industries such as thermal power plants operate with steam. One of their main concerns is that this water should be pure, as the presence of impurities can cause corrosion on the metal surfaces of the turbines or the boiler.

For industries that work with steam, it is very important to carry out periodic analyses to certify the purity of the steam and also to monitor the critical parameters in the steam. Including different parameters such as pH, conductivity, silica, sodium, dissolved oxygen, phosphate and chlorides. It is very important that the SWAS is well designed to ensure that the sample is representative.

At Delinte we manufacture custom-made Swas racks

The Swas frames we manufacture at Delinte follow the specifications indicated by each customer according to their particular needs. We cover from UPN to tube racks. We use both stainless steel and carbon steel as materials.

We always offer our customers the option of
customizing the racks, adapting the
adapting the mounting plate to their needs and including or not the liquid analysis basin. Our swas racks are ISO 9001:2008 certified, which guarantees the application of a continuous quality management system in companies. In addition, we hold the UNE 15805 CL2 certification, which allows us to demonstrate that our company manufactures products that meet the quality requirements for welding vehicles and railway components.

Of course, in Delinte we do not limit ourselves to manufacture racks, our offer includes other types of products such as engine center cabinet or shelter type cabins among others. The design of all our products is made taking into account the final use that the customer is going to give them, but also the assembly of the parts. In addition, we also take care of assembly and commissioning.

Delinte, a company of specialized professionals

One of the keys to our success as a company is to have a specialized staff with great experience in the development of swas frames. Of course, we always adapt to official regulations and carry out exhaustive quality controls so that our products meet the requirements of our customers.

If you wish to contact us, you can do so by calling 91 677 03 64 or filling out the form on our website. We will contact you, clarify any doubts you may have and, if you wish, we will provide you with a quotation.

La entrada What are Swas frames? se publicó primero en Mecanizados DELINTE.