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conducted in field by Innse Cilindri on work rolls of finishing stands of hot strip mills. The correct interpretation of the eddy current signals and a good calibration of the automatic system have allowed, in many cases, a substantial optimisation of regrinding practices. Key Words: Work roll; Eddy current system; Bruise signal; Roll redressing.
The value of a new work roll is usually less than one hour operating cost in a hot mill. Complex roll failures can lead to long mill delays of up to 15 hours or even more which can hardly be justified. Additionally, associated damage to back up rolls and mill equipment are often observed.
By default, the strip width in a hot-strip mill is deter-mined by edging and rolling the strip in the roughing mill. The width deviation after the finishing mill arises from the width deviation in front of the finishing mill and from width-spread anomaly occurring inside the finish-ing mill. The behavior of width spread in a finishing mill
because a square head-end is critical to properly threading the finish mills and the down coilers, and because an uneven tail can bruise work-roll surfaces or cause threading problems for the next production process, the head- and tail-ends of nearly every transfer bar are cropped by a pair of large steel drums each with a shear blade extending …
John G. Lenard, in Primer on Flat Rolling (Second Edition), 2014 2.7 Generation III – Coil Box Hot Strip Mills. In the 1970s, Stelco of Canada developed the hot coil box designed for installation in hot strip mills ahead of the finish mill for coiling the transfer bar from the roughing mill and uncoiling it into the finishing mill. The coil box reduced the distance between the roughing …
Finishing CSI's Hot Strip Mill includes six finishing mills, which reduce the thickness of the transfer bar down to the gauge required by the customer or the next process. The rolling speed is set to allow the last stand to perform the final reduction at …
after the roughing mill stand of a hot strip mill has b een discussed. The control The control technology developed is based on both model techniques (level 2 a utomation) and real-
MBI Rolls, a division of M. Brashem, Inc., has provided the best value for quality, price and service to the steel industry for more than 30 years. We are a leading distributor of mill rolls to the north American steel mill industry, with significant share of the long bar market.
The micro structure offers excellent surface finish to rolled product along with bruise and crack resistance due to presence of graphite which can be altered depending upon the rolling condition. Applications: These rolls are used as work rolls in the finishing stands of Hot Strip Mills, Plate Mills and Steckel Mills. Read More
(Roll forming: )This film takes you through the processes within a hot rolling mill. You'll get to see the different stages all th...
perfect surface finish. With more than 140 descaling units installed in hot strip mills, heavy plate mills, CSP® plants and Steckel mills, SMS Siemag is the global leader in descaling technology. In order to provide steel manufacturers with even more efficient solutions, SMS Siemag focusses on the further development of its descaling technologies.
The Roll Defect Management Process (RDMP) is a system which is designed to manage, track and evaluate all mill rolls found in use in the hot and cold production of flat rolled metal strip. The RDMP is capable of detection, distinction and differentiation of various defects found in the mill roll using a nondestructive inspection system for generating variable amplitude output voltage …
This defect can be caused when a tail-end of a previous coil has variable shape, and passes through the last hot mill finishing stand. The sheet can whip/hit into the roll surface and mark it. As a result, the following coil produced through the …
HOT STRIP MILL — HIGHEST PERFORMANCE FOR NEW AND EXISTING STEEL MILLS 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.
ThyssenKrupp Steel Europe spent a quarter of a million euros on renovating its hot-strip rolling mill in Duisburg. The animation shows how it all works.
LMM GROUP ROLLS main equipments are at the leading level domestically and its key equipments are imported from world-class enterprises. There are two production lines of rolls in the company : One is the production line of centrifugal cast work rolls for hot strip mills and wide & heavy plate mills. The other is the production line of forged rolls.
Hot Strip Mill Rolls. We offer work rolls for finishing mills used by blast-furnace and electric-furnace steelmakers to manufacture hot strip. Rolls for H- beam Steel Mills. We offer rolls for mills that produce H- beams steel which are widely used in buildings, bridges, ships, and quay walls. Horizontal rolls and vertical rolls are combined to ...
The micro structure offers excellent surface finish to rolled product along with bruise and crack resistance due to presence of graphite which can be altered depending upon the rolling condition. Applications: These rolls are used as work rolls in the finishing stands of Hot Strip Mills, Plate Mills and Steckel Mills.
Roll wear in a hot strip mill (HSM) is a detrimental process, which progressively worsens the rolls. This necessitates replacement of the rolls after rolling a number of strips. Roll wear adversely affects the strip shape and the performance of a mill. It is important, therefore, to quantify roll wear during the rolling process.
foil mills which comprise ① a roughing mill, ② an intermediate rolling mill, and ③ a finishing mill, according to the intended thickness and production amount (rolling time) of the foils. In some cases, in order to minimize initial investment, multi-function mills are used that can perform every process from roughing to finishing in one unit.
Cold Rolled Strip Steel Finishes. Cold-rolled strip steel finishes are usually specified to one of the finishes below. Number 1 or Matte (Dull) Finish: A finish without luster produced by rolling on rolls roughened by mechanical or other means. This finish is …
While a steel mill cobble might be fascinating to watch, akin to a light sabre, they are extremely dangerous and unpredictable. Once a steel mill cobble begins it will only stop when the individual line of steel comes to an end. We are dealing with materials touching temperatures in excess of 1200°C which would cut […]
For a quarto hot strip tandem finishing mill equipped with work roll bending system, a control strategy based on a mathematical modelization of the roll stack deflection and of the instability ...
bruise on hotstrip mill finishing mill rolls. mm hot rolled strip mill are substituted by flat roll, sand bagging machine for sale hardcore suppliers in nairobi china mobile concrete jaw crusher.
Finishing Temperature and Coiling Temperature Flatness, Thickness Uniformity Heating, Soaking and Cooling Temperature, Atmospheric Gas Composition Flatness, Surface Roughness Coating Mass (Plating, Chemical Treatment) Amount of Anti-Rust Oil, Laminate Heating Temperature Cold Strip Mill Blast Furnace Converter Hot Strip Mill Hot Rolled Coil
NKMZ rolling mill rolls are made with alloy forged steel with Chromium content of 2%, 3% and 5%. They are used in different types of rolling mills such as conventional hot strip mills, steckel mills, heavy section mills, 4Hi and 6Hi cold rolling mills, and are advantageous for the rolling of steel and stainless steel, aluminum and other non ...
1 An investigation of worn work roll materials used in the finishing stands of the hot strip mill for steel rolling M. Nilsson1,2*, M. Olsson1,2 1Dalarna University, SE-791 88 Falun, Sweden. 2Uppsala University: Ångström Laboratory, Box 534 SE-751 21, Sweden. Abstract The surface failure characteristics of different work roll materials, i.e. High Speed Steel, High Chromium Iron
4. Equipments 5.Machining 6.Inspection and Delivery 7. The Operation of Rolls 1.) Clean off grease, dust and rust from roll surface before taking regular inspection, pay special attention to roll surface, there should be no marks, bruises,rust or cracks on roll surface, do not use the roll on mill with surface cracks.
Mill Processing & Finishing. Applications in which our knives are used include Flat Rolled Coil and Sheet Processing Lines for: Cut-to-Length. Galvanizing. Hot Roll Finishing. Recoil & Inspection. We manufacture every type of knife used on every kind of mill processing and finishing line. Our knife selection includes:
The integrity of rolls of HSM / CRM affects the mills performance in terms of mills productivity and availability, inventory costs, man and machine hour costs and also the quality of the rolled products. Immediately after commissioning of the Hot Strip Mill at TATA STEEL, due to frequent failure of rolls, the mill suffered a lot in terms of ...