Full inspection of rolls with all available testing equipment. Each roll is traceable. Classification of Roll Materials. Steel Base Rolls (Cast or Forged) Cast steel rolls: These cast steel mill rolls have qualities and grain structure like steel although the carbon content may be quite high (up to 2.5%).
The blooming mill itself is conceived as a duo reversing blooming stand with transverse sliding movement for pass change. It features an inline quick-change system for simple and fast replacement of rolls and chocks. The rolls have a length of 1,500 millimeters and a diameter of 1,060 millimeters.
2. Reasonable Selection of Roll Materials. 2.1 Blooming Mill Roll. Most of the blooming mills in China are two rolls reversible type. At present, cast steel and forged steel rolls are mostly used in the blooming mills of Angang, WISCO, Chongqing Iron and Steel Co., Ltd., and Maanshan Iron and Steel Co., Ltd. This kind of roller has two ...
Steel Rolling Mill Machine: Hot Rolling Roll. At present, there is a trend of using bucket steel rolls to replace forged steel rolls. The roll of the 6VH billet continuous rolling mill in the Baosteel blooming mill is made of forged semi-steel and forged cast iron with 1.7% ~ 2.4% C, which has good wear resistance and poor hot crack resistance.
of the blooming mill, it was decided to change the design of the rolls and to arrange the first pass in the middle of the roll barrel (see Fig,) instead of arranging the passes in …
a hot rolling mill are usually designed based on the type of A typical roller of a blooming mill has different roll grades and dimensions of the products and the mill capacity. grooves in a single roll set depending upon the products pro- These have been established over the years based on ana- duced as typically shown in figure 1(a).
Cluster mill or Sendzimir mill stand – In this rolling mill stand, each of the work rolls is supported by two backing rolls. Cluster mill and Sendzimir mill are used for rolling thin strips of high strength materials and foils [0.0025 mm thick]. The work roll in these mills can be as small as 6 mm diameter – made of tungsten carbide.
Layout. Blooms and slabs are products of primary rolling process. It is rolled from an ingot in a Blooming or Slabbing mill. These blooms and slabs are further rolled into various finished products and in various types of finishing rolling mills. Fig. 4.1 Type of Primary Rolling Mill. Bloom is generally a square section, produced in a Blooming ...
they can roll the work piece in decreasing cross section. It is used for rolling thick work piece in single pass. diameter, or per mass of roll material used; or total tons of the Cluster Rolling Mill: In this type of rolling mill, each of working roller is backup by two or more of larger backup roller. These rollers are arrange as shown in figure.
Type # 2.Billet Rolling Mill: . Figure 8.12 also shows the arrangement of a modern billet rolling mill. It is located just after bloom rolling mill, so that the hot bloom coming from blooming mill can be rolled directly into billets of cross sections ranging from 55 x 55 mm 2 to 170 x 170 mm 2 without reheating it.. The mill consists of two groups of rolling stands …
Roll pass design developed by analytical method was further optimised by FEM based model in a round bar rolling and in an oval-round roll pass and a …
Changes in the dendritic structure along the section of the billet 290 × 290 mm after rolling at the blooming rolling mill: (a), (b) surface; (c), (d) ¼ of height; (e, f) center. × 7 Schedules ...
ABSTRACT SAE 4340 alloy steel is used in structural parts, forging industry, gears and shafts used for power transmission and landing gears of aircraft. Basic production process of the metal bar involves heating the billet in reheating furnace up to 1200°C–1210°C followed by passing it through a pair of grooved rolls in a rolling mill. …
Rolls for Primary Mill. The roll of a blooming or slabbing mill comprises several elements (Fig. 4.7 below): 1-barrel diameter D and length I; 2-necks, diameter . 7 and length /, on both sides of the barrel and mounted in the bearings and 3 - roll neck, having a fork shape and serving to link the roll to the universal spindle.. The other end of the roll is either …
The deformation behaviour of a hot rolled micro-alloyed steel bar of grade 38MnVS6 was examined using an FEM model during the initial passes in a blooming mill, as a function …
[Show full abstract] 0.012, an intermediate mill for the gage range of 0.35 mm to 2 × 0.006 mm and a finishing mill for the gage range of 0.12 mm to 2 × 0.006 mm. The two main production targets ...
using an FEM model during the initial passes in a blooming mill, as a function of three different pass schedules, roll groove depth, collar taper angle and corner radius. The simulations predicted the effective strain penetration, load, torque, fish tail billet end shapes, and metal flow behaviour at a chosen temperature, mill rpm and draft.
Once, data related to the size of input bloom and finished billet section are firmed up, (decided on the basis of input billet size requirement of the down line finishing mills viz, Bar and rod mill flight structural and Wire rod mill), Roll pass designer has to then firm up the reduction schedule of the billet mill.
Roll Pass Design ... Willibald Trinks. Penton Publishing Company, 1934 - Rolls (Iron mills) - 290 pages. 0 Reviews. Reviews aren't verified, but Google checks for and removes fake content when it's identified ... action Actual allow amount angle Average beam becomes bending billet bloom blooming mill calculated causes cent channels coefficient ...
Based on the important boundary conditions of rolling simulation including friction, heat conduction and interactionsof the workpiece and rolls, the hot continuous rolling processes of large-diameter mandrel round bar (200 mm indiameter) in 6VH-stand hot tandem mill are successfully simulated by three-dimensional coupled …
Blooming Mill. a high-capacity rolling mill for the reduction, into blooms, of steel ingots of large cross section, with masses up to 12 tons and larger. In some cases a blooming mill is used for the rolling of slabs and also shaped pieces (for heavy I beams, channel iron, and the like). In metallurgical plants the blooming mill is an ...
The first hot working operation is done using a roughing mill (blooming, slabbing or cogging). These mills are designated based on the roll diameter. Initially, scale removal is done. Breakdown of cast ingots/blooms/slabs/for subsequent reductions. The ingots are turned 90o between subsequent passes. Generally, they are two high reversing mills ...
The deformation behaviour of a hot rolled micro-alloyed steel bar of grade 38MnVS6 was examined using an FEM model during the initial passes in a blooming mill, as a function of three different ...
