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Dec 03, 2015· The primary function of the conventional hot strip mill (HSM) is to reheat the semifinished steel slabs (rolled or continuously cast) to the rolling temperatures and then to roll them thinner and longer through a series of rolling mill stands driven by large motors and finally coiling up the lengthened steel sheet for its easy handling and ...
The primary purpose of a hot strip mill is to reheat thick steel slabs into thin sheets with varying thickness. The thick steel slab passes through several rolling mill stands that are driven by powerful motors. The rolled sheets then pass through coilers, thereafter these coils move on .
The Hot Mill rolls slabs weighing up to 30 tons between 30" and 74". Steel slab 8 to 9 inches thick and up to 36 feet long is rolled into strip as thin as 1/16 inches and up to a halfmile in length. Coils are produced with a 30"
The third volume of Hot Strip Mill Operations looks at the basic causes of roll wear to guide operators away from roll cooling myths of pressure, volume or impact angles helping to reduce roll wear. Continuing the theme of the second volume ( Roll Cooling, Rolling Problems and Shape ) that roll cooling has little to do with roll wear, the third ...
Commonly coldrolled products include sheets, strips, bars, and rods; these products are usually smaller than the same products that are hot rolled. Because of the smaller size of the workpieces and their greater strength, as compared to hot rolled stock, fourhigh or cluster mills are used.
The sheet can whip/hit into the roll surface and mark it. As a result, the following coil produced through the hot strip mill will have these bruises on the head end. If the marks on the work rolls are light, the defect only bruises the next coils surface and eventually wears off the rolls .
JSW Steel manufactures Hot Rolled (HR) coils at its stateoftheart Hot Strip Mills (HSM), at Vijayanagar (Karnataka) and Dolvi (Marashtra). Vijayanagar HSMI and HSM2 with commissioned capacities of MTPA and 5 MPTA respectively are equipped with sizing presses and an automatic line inspection facility which makes this facility the widest Hot Strip Mill in India.
The demand for hot rolled strip is growing in multiple ways. To remain competitive, new and existing mills must meet this challenge in the best possible way. The production of hot strip is a key element of steel production. Since close to half of all steel produced is hotrolled to strip, mills require maximum throughput and availability ...
John G. Lenard, in Primer on Flat Rolling (Second Edition), 2014. Friction and Wear. Work rolls in hot strip mills wear due to friction between the roll surface and hot strip. (Backup rolls wear as well, but under pressure with elastic deformation, the friction is much less, except for the high work roll roughness in the last stand of a sheet rolling tandem cold mill).
ArcelorMittal Dofasco operates a modern 7stand Hot Mill that provides high quality Hot Rolled Steel to our Automotive, Construction, Tubular and Service Centre customers. The mill also supplies down stream operations (Cold Rolling, Galvanizing and the Tin Mill). Our advanced Hot Mill .
Jan 14, 2017· Hot Rolling is employed for rolling of steel slabs to hot strips in hot strip mills. Like any other hot rolling operations, rolling of hot strip is also a plastic deformation of the material of the slab caused by compressive force applied through a set of rolls.
Unprocessed bands are shipped directly off the hotstrip mill and haven''t been trimmed or cropped back to gauge. Additional processing such as temper passing, pickling, edge trimming, and tension leveling are available on site or through a wellqualified external processor.
Jul 16, 2008· The dynamics of shape or profile depends on the several process parameters in a hot strip mill. This research paper presents the prediction of the profile or strip crown generated during rolling in the finishing stands of a hot strip mill with the use of artificial neural network (ANN) by taking into account the operational parameters such as width, thickness, speed, and roll bending, among ...
Feb 15, 2019· defectsinhotrolledproducts1 1. 1. Defects in Hot Rolled Products Rolled in Scale (RIS) Sliver / Seams Blister Edge Cracks Spongy Edge Rolled in Extraneous Material Roll Marks Indentation Mark Scratch Mark Folds Lamination Camber .
Strip steel or cold rolled strip is a steel product that is produced from a hot rolled strip that has been coil is then reduced by a single stand cold roll steel mill straight away or reversing mill or in a tandem mill consisting of several single stands in a series. The strip is reduced to approximately final thickness by coldrolling directly, or with the inclusion of an ...
The Hot Strip Mill is capable of producing 2 Million tons of hot rolled coil annually in a width range of 35 in. 53 in. and a gauge range of in. through in. Our 4tank Pickle Line can process 1 million tons of Hot Rolled Coils annually between 29 in. and 56 .
NOTE: Hotrolling and coldrolling should not be mistaken for different grades of steel. Steels of different grades can be produced as hotrolled or coldrolled. HOTROLLED STEEL. Hotrolling refers to a mill process in which you roll the steel at a temperature above its recrystallization temperature; a heat that typically exceeds 1000° F.
The new Hot Strip Millwith 3 Million Tonne per annum (MTPA) capacity is a stateoftheart mill with few parallels in India and will be producingworldclass hot rolled (HR) coils. Incidentally, within two days of the commencement of hot trails of the mill, it has rolled out its first coil successfully
Hotrolled steel offers performance, versatility and value. Tata Steel''s line of hotrolled strip steel includes forming and structural grades, heattreatable steels and advanced and highstrength lowalloy steels. All are specially designed for specific and demanding applications.
The rolls induce plastic deformation. Thus, the yield strength of cold rolled steel is higher than that of hot rolled steel. As an example, a hot rolled steel product may have a yield strength of 235 MPa. In comparison, a cold rolled steel product with the same chemical composition has a .
Sep 11, 2014· The differences between hot rolled steel and cold rolled steel relates to the way these metals are processed at the mill, and not the product specification or grade. Hot rolled steel involves rolling the steel at high temperatures, where cold rolled steel is processed further in cold reduction mills where the material is cooled followed by ...
The widest range of hot rolled products, with thickness up to mm, width up to 2050 mm and coil weight up to 36 mt. The widest Hot Strip Mill (HSM) in India, capable of rolling up to 2150 mm. A rare product portfolio, perfect for line pipe applications, with the capability to .
Hot Strip Mill. The Hot Strip Mill is where CSI''s rolling operations begin, as steel slab is reheated and rolled to hot rolled coil. With an annual capacity of more than two million tons, the rolling mill is more than a halfmile long and includes a walking beam reheat furnace, a twohigh scalebreaker, five fourhigh roughers, a crop shear, six fourhigh finish mills, and two downcoilers.
A core product of Union Electric Åkers Thousands of Hot Strip Mill Work Rolls come off of our production lines each year, making Union Electric Åkers one of the world''s largest roll manufacturers of Hot Strip Mill Work Rolls. All our Hot Strip Mill Work Rolls are made using the vertical centrifugal casting method, ensuring high inservice integrity and premium performance results.
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