A quenching mill processes steel plates and sheets to increase their strength and flatness. It involves rolling the steel through a cold reduction process, reducing its thickness by 1.5% to 2%. This eliminates uneven bending caused by annealing. The steel is fed into the mill from coils and is cut into smaller segments after passing through the mill. Modern quenching machines are automated and can control rolling force, elongation, position, and tension. The process can also include high-pressure water feed to prevent crimping. Speeds range from 656 to 2,953 feet per minute.
A quenching mill is a finishing plant that processes steel in the form of plates and plates to give it greater strength and a uniform flatness to the surface. The metal forming method in a quenching mill involves rolling the steel sheets through the so-called cold reduction or quenching pass process. This increases the density of the steel by reducing its overall thickness usually by 1.5% to 2% without allowing the steel to expand under pressure. After the steel has gone through a quenching mill, it is more useful and reliable in manufacturing plants that need to shape it further or cut it with laser and plasma equipment.
Metal forming using a quench mill is an important step in the steelmaking process. This is because milling work usually follows immediately after annealing, firing and cooling the sheet metal or steel. The annealing process tends to relieve the microcrystalline stress in the steel to such an extent that it exhibits a tendency to bend unevenly. This propensity for stretching in some areas and not others along the surface is what the quenching mill eliminates by reducing the volume of the steel from 0.5% to 3.5% of its overall thickness.
Steel plates that pass through a quenching mill go through a fairly simple procedure. They come in the form of coils of sheet steel that are produced in a hot strip mill, or what is commonly known as a pickling line. A machine known as an uncoiler unwinds these coils of steel and feeds them into the mill. The steel mill also controls the extensions, or ends of the steel, as it is worked and prevents YPE (yield point) elongation. Yield point stretching is a deformity that can occur in which discontinuous regions succumb to stress due to pressure and stretch or flatten.
After the steel has gone through the mill, its surface layer is more uniform. A pinch roll or shear may also be present at this stage, which is used to cut the steel into smaller finished segments. A machine known as a rewinder then takes the steel as it exits the quenching mill and rolls it once more, making sure the sides are straight as well.
Many modern hardening machines are automated, with every feature in working sheet steel precisely controlled. These features can include automatic constant rolling force and elongation (AFC) and (AEC) controls, as well as automatic position and tension (APC) and (ATC) controls. It is also possible to automate the loading and unloading of the steel coil from the machines that feed the quench mill and pick up the finished product, and this can include a high pressure water feed which prevents the steel from crimping in the rolling process. lamination. Typical speeds for an automated quenching mill range from 656 to 2,953 feet (200 to 900 meters) of steel per minute depending on the plant’s production schedule.
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