Turkmenistan manat bars come in with different weights and sizes and information is given along with precise grades. Products are weighed and shipped per pack.
The high strength reinforcement bars, known as TMT or rods under thermal mechanical treatment, have a core that is hardened outside and a core that is more soft from the inside.
They get their name from the production method known as thermo-mechanical therapy, which is also called the method.
Because of high tensile strength, steel is an important component that is used in a wide range of construction and production applications, including not limited to buildings, infrastructure, tools, ships, cars and other machinery.
Corrosion, fire and other environmental and random factors can have a negative impact on steel structures, which can seriously compromise their structural health, safety, and longevity.
In order to improve the mechanical properties of steel such as formability, hardness, corrosion resistance and yield strength, different and different operations are carried out.
Mechanical heat treatment (TMT) is one of these many processes that combine mechanical or plastic deformation processes such as compression or forging, rolling, etc. with thermal processes such as heat treatment, water cooling and heating and cooling at different rates into a single process. Other examples of this type of process include:
Below is a list of steps that are part of the thermo-mechanical treatment process:
The process of extracting iron from ore and turning it into steel: In this stage, raw materials such as iron ore, coke, or grooves (limestone and dolomite) are used to extract iron, which is preserved in the form of molten.
Then the iron is turned into steel. Afterward, the molten iron is placed in a pre-treatment process and then converted to steel in a heat exchanger, and finally, it is heated in a spool to refine the chemical composition of the steel.
After this step, liquid steel is poured into a casting machine, leading to billet production (also known as pencil ingots) with a cross-sectional area of at least 130 mm۲.
Steel billets are heated up to approximately 1200 °C (2192 F) to 1250 °C (2282 F), and then they are rolled to change the shape of the ingot to the final size and shape of the reinforced strip (rebar) by passing the spade from a rolling base.
The last step for the construction of the base is to form an armed rod.
Power off: when the reinforced hot bar is out of the final rolling station, it will be switched off quickly. A quench is a form of heat treatment in which the brakes are quickly cooled by water in a quench box to obtain special material properties.
Quench is done to ensure that bars have favorable properties.
The quenching process makes it difficult for undesirable processes such as phase transition to occur. This goal is achieved by shortening the period when these undesirable reactions are more likely to occur.
Moreover, the sudden and violent transition of temperature leads to brittle of the outer layer of the steel which in turn increases tensile strength and durability.
This is because the process of turning off the external surface of the reinforced rod into martensite, which is a kind of steel that is very hard and causes it to shrink.
This causes the core to come under pressure, which in turn helps produce the correct crystal structures. The culmination of this process is that the quenched surface will be frozen and fragile, while the center will continue to maintain its heat.
After removing the extinguishing box, a temperature gradient is generated through the cross section of the off-bar, resulting in its automatic annealing. For this reason, heat from the core to the surface, which is at lower temperature, because the core is at higher temperature.
For this reason, the external martensitic layer has been transformed into a structure called a reversible martensite, and this also produces an interface ring composed of martensite and bainite (a plane-like structure).
At this point, the nucleus maintains its austenitic state, which is characterized by a typical cubic crystal structure and also known as the gamma iron phase.
After the self-annealing process, the rods go through an additional step called atmospheric cooling. This results in a higher temperature difference between bars and a more smooth and uniform surface.
When the rods are cold to their final temperature, the austenitic nucleus will change to a ferrite-pearlite structure.
Therefore, the microstructures of the final product are different as seen at its cross-section. The most externally placed product layer is composed of martensite, which is hard, strong, and temperate.
In the middle layer, the composite layer is composed of martensite and bainite and its core is modeled as Ferite, Hard and Ductile and Pearlite.
On the other hand, in order to increase the hardness and increase the strength of the Zarshk extract, this smaller-scale gear is usually cold in the same conditions.
On the other hand, the shutdown method does so that the TMT bars do not need any additional hardening on their own. There is no pressure in TMT, so no torsional stress occurs during this process.
This eliminates the possibility of surface defects in tungsten bars. As a result, compared to cold, twisted and deformed rods (CTD), TMT rods suffer significantly less than corrosion.
The quality of the rods produced in Turkmenistan is determined by these three main factors:
Precursor.
A mill base is professionally made and fully automatic.
A technology for quenching and tempering that is built thoughtfully.
