3) Forged semi-high-speed steel cold rolls. During the actual use of cold-rolled work rolls, production accidents such as steel jamming, steel sticking, and belt breakage may occur, which will cause the local structure and hardness of the cold-rolled work roll body made of Cr3 and Cr5 series materials to change, resulting in roll surface ...

This paper outlines the exciting results from cast rolls made in a special type of alloyed steel called Semi-HSS used in a temper mill at Siderar.

In order to meet the specific requirements of different rolling mills and rolling conditions, different alloying elements can be added to the steel for rolls to improve the performance of the rolls. LMM GROUP forged steel roll has a large diameter of ф1650mm, and has different material series such as cr2, cr3, cr4, cr5 and so on.

(1) Strip mill roll. The roll body is round: general rolling mill. Dimpled roll body: hot rolling, compensation of thermal expansion, control of plate shape. Slightly convex roll body: cold rolling, compensating for stress bending, and controlling the shape of the plate. S, cigar and other special curved roll body: CVC rolling mill, UPC rolling ...

The company has two sets of horizontal centrifugal casting machines, with the maximumspin cast roll size of Dia. 1400× 3860mm Barrel Length. The centrifugal casting machinescan realize the integration of spray coating and controlling the mould temperature.They aredriven by hydraulic motor and operated steadily.

LMM GROUP main products focus on the cold and hot plate & wide strip mill rolls and heavy section mill rolls and big casting & forging pieces. ... Cast steel mill rolls Alloy cast steel rolls; Semi-steel roller; ... Product advantage. The world No. 1 in crude steel production steel plant, over 70% of the HSS for bar and wire are from us. …

Contains high alloy elements、the single-groove (time) steel passing is higher, improves the overall benefit. The HSS rolls have good thermal stability, and the roll surface has high hardness and good wear …

work rolls manufacturer Professional Rolling mill rolls manufacturer with 20 years of production experience. mainly produces all kinds of metallurgical rolls for various types of steel, bar, high-speed wire and strip hot and cold plate and strip rolling mills.WE can provide characteristic service and differentiated products according to the different …

Ternium Siderar San Nicolas Works. Trials are running in a temper mill (n°1) and in the tandem mill that in this case has 4 stands. The main product of tandem mill is tin plate while in the temper mill the output is divided by 80% in cold rolled annealed steel and 20% hot rolled steel (Tab.2). In Fig.2 it's shown the temper mill arrangement.

Founded in 2007, LMM GROUP mainly produces all kinds of metallurgical rolls for various types of steel, bar, high-speed wire and strip hot and cold plate and strip rolling mills. cast iron rolls

The effect of austenitizing temperature on the microstructure and mechanical properties of semi-high-speed steel (S-HSS) cold-forged rolls was investigated.

LMM chill iron rolls have an excellent combination of metallurgical and physical properties with uniform and stable hardness ensuring the highest quality of cold-rolled strip and efficient performance characteristics (resistance to wear, thermal shocks, fatigue contact cracks).Chilled cast iron rolls are mainly suitable for Section mill、bar mill …

The quality of work rolls that come into direct contact with the steel product has a direct effect on product quality and mill operation. A forged steel with a chromium content of 5 mass% has been ...

Two alloys grades for work rolls used in the roughing stand of Hot Strip Mill — high chromium steel (HCS) and semi-high-speed steel (semi-HSS), In this paper, the new semi-high-speed steel grade ...

The centrifugal casting process allows to produce bimetallic rolls where the external layer is made in a very hard steel with optimal mechanical properties. These steels, called semi …

Cast rolls are manufactured with highest standards by using static or centrifugal casting techniques by our partner foundries. High tech HSS / Tool Steel rolls and assembled …

the forged HSS rolls present enhanced roughness retention, strengthened resistance to thermal and mechanical stresses, enable extended rolling runs while decreasing stock …

On September 10, 2015, in the rolling process of the steel rolling mill, the LMMGROUP high-speed steel bar rolling experiment was carried out on the first bar line C12 to four cuts, and C14 three cuts to K1, K2, K3, and K4. According to the trial situation, The average amount of steel passing through LMMGROUP rolling is about 50%-60% of the ...

Semi-HSS Cold Mill Intermediate Rolls. New Type Cold Work Rolls with High Roughness Retention Ability. Work Roll for High Class and High Strength Plate Mil. Cold Work Rolls for High Class Automobile Sheet. High Wear-Resistant Work Rolls Without Chrome Plating. Roll-Mark Resistant Cold Work Roll.

New Type Cold Work Rolls with High Roughness Retention Ability. Work Roll for High Class and High Strength Plate Mil. Cold Work Rolls for High Class Automobile Sheet. …

Particular highlights of GP's product range include work rolls in HSS and semi-HSS grades and double-poured back-up rolls with final weights of more than 200 metric tons. In addition to the manufacturing of rolls, we also offer complete after-market and consulting services, covering all aspects of the roll and its actual application in the mill.

We produce 2-high, 4-high, 6-high, and other mill configurations for cold and hot rolling of strip, and wire made from carbon steel, stainless steel, silicon steel, non-ferrous metals, super alloys and precious metals. Narrow Strip Mill Rolls are primarily manufactured at our plant in Slovenia using the most modern methods available.

It is better to use semi-steel rolls for the back-up rolls. Cold rolled strip rolls. The cold strip tandem mill consists of three to six stands, which are four-high mills with larger back-up rolls and smaller diameter work rolls. During cold rolling, emulsified oil is used to lubricate the steel strip and also to cool it.

No1. LMM GROUP Chinese Mill Rolls Manufacturer,Founded in 2007, LMM GROUP mainly produces all kinds of metallurgical rolls for various types of steel, bar, high-speed wire and strip hot and cold plate and strip rolling mills. The company covers an area of 100,000 square meters, including two complete production lines for cast rolls …

Steel Mill Rolls,work rolls/backup rolls/hss rolls/adamit rolls. LMM GROUP can supply customer with high wear resistance and stablity, high-strength quality rolls. ... bar, high-speed wire and strip hot and cold plate and strip rolling mills. The company covers an area of 100,000 square meters, including two complete production lines for cast ...

In order to compensate for the change of roll shape caused by pressure and temperature, the roll must be ground into a certain arc in advance, which is generally called the roll shape of the roll. For the cold rolling mill, the pressure roll type is the main one, so the curvature selected by the roll type of the cold rolling mill is usually the ...

The HSS Roll has good thermal stability、 high hardness and good wear resistance. 3. Forming oxide film during use working process,improve wear-resistant、 the strength of the roll neck is high. ... Cold strip mill rolls: …

The trial data shows that the ∮370mm high-speed steel roll produced by LMMGROUP has far exceeded the single-groove assessment value of 1,500 tons in the "Roll Ordering Technical Agreement", and the effect is good. On September 10, 2015, in the rolling process of the steel rolling mill, the LMMGROUP high-speed steel bar rolling experiment ...

LMM Work rolls have an excellent combination of metallurgical and physical properties with uniform and stable hardness ensuring the highest quality of cold-rolled strip and efficient performance characteristics (resistance to wear, thermal shocks, fatigue contact cracks).

mill rolls breakage Causes - Both brittle and ductile fractures are caused by roll stress exceeding core strength. The reasons for this are related to the residual stress of the roll itself, the mechanical stress during rolling and the thermal stress of the roll, especially when the temperature difference between the surface and the core of the roll …

In recent years several tests have been performed with centrifugally cast bimetallic rolls as work ro lls in cold rolling. This paper outlines the exciting results from cast rolls made in …

LMM Work rolls have an excellent combination of metallurgical and physical properties with uniform and stable hardness ensuring the highest quality of cold-rolled strip and efficient performance characteristics (resistance to wear, thermal shocks, fatigue contact cracks).

Defects in the use of cold-rolled rolls will cause the quality of batches to be degraded or even scrapped, resulting in lower yields and possibly damage to related equipment. This largely affects product quality and production rhythm. Roll surface defects mainly include chatter marks, roll marks, knives, cracks and spalling, which will affect ...