pdf roll failures manual hot mill cast work rolls the ,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 hours or even more which can hardly be justified. additionally, associated damage to back up rolls and mill equipment are often observed.free consultaion
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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 hours or even more which can hardly be justified. additionally, associated damage to back up rolls and mill equipment are often observed.
TP roll ihifuji denkitoshiba 3750 kW DC 31.2 MN 360 mmin WR 720 2850 mm bur 1520 2850 mm TP 1620 2850 mm wrb TP roll cold coolant sprayer table specifications of hot finishing mill TR htm hrt edm edm edger mill hrm hot reversing mill htm hot tandem mill 150-mm cut shear
steel which has been processed through the skin mill skin roll product that has been processed at the skin mill.. slab slabs are the raw material for wscs hot-strip mill produced off the caster, and are inches thick, inches wide by inches long. slag waste product in ironmaking and steelmaking.
sep 12, 2016 PT krakatau steel, indonesia, has placed a turnkey order with sms group for the supply of a high-performance hot strip mill. the order comprises the entire process equipment, ranging from the slab yard to the coil yard, the electrical and automation systems, the auxiliary facilities such as water management, roll shop and crane systems, and the construction of the pertaining infrastructure and
keywords: rolls, wear, oxidation, firecracks, sticking, friction abstract the roll surface is crucial for work rolls in hot rolling mills. We have to deal with wear, oxidation, firecracks, sticking and friction. this paper starts with temperature simulations on and below the roll surface during rolling and takes common experience into
dec 13, 2012 march 11, rolls of sheet metal at the cold sheet mill, a $300 million facility which opened in the fall of 2000 at sparrows point steel plant. march 11, scene here is the sparrows point complex of bethlehem steel.
thanks are also due to the staff of roll shop of hot strip mill for their co- operation and help in carrying out various measurements on the rolls. references ryu, kwon, lee & kim, evaluation of the finishing roll surface deterioration at hot strip mill, isij international, vol. 32, 1992 1221 1223.
the roll shifting and bending moment are applied in the rolls of the finishing mills to maintain the required crown and flatness in the strip produced. In a four-high hot strip mill, the finishing mill of the hot strip mill is equipped with two work-rolls and two back-up rolls and is shown in fig. during the passage of the strip between the
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.
the process stability of finishing mill is significantly influenced by the clearance between the chocks and housing in mill stands. the on-site data of a finishing mill had shown that the clearances in the finishing mill stands were clearly associated with the incidence of strip end flip. the aim of this work was to establish a numerical model to analyze the effect of the clearances on the
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