Work rolls and backup rolls

Product Details

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 and forged steel rolls, processing workshops, product research and development centers, testing centers, training centers and office buildings and other supporting facilities. The factory environment is very beautiful.

LMM have been supplied to world’s top steel manufacturer Arcelormittal, TATA Steel, EZZ steel etc. We do OEM for Concast and Danieli for a long time.

• Alloy Indefinite Chilled Cast Iron Rolls (ICDP)

The ICDP rolls adopt the centrifugal casting method with three layers casting process for getting good metallurgy bonding between shell and core to avoid the alloys permeate each other.

These rolls have good wear resistance and surface finish. That’ s because the certain amount of free graphite exists in the microstructure, and the roll have very good anti-sticky property and anti-fire property. It’ s proved successful used in many different hot strip mills.

Typical Chemical Analysis and Mechanical Properties:

The scope of supply

①200-600×1050×3000;(φ500-1360)×(1350-5300)×11000

• Enhanced High NiCr Indefinite Chilled Rolls(En-ICDP)

On the basis of original alloy composition of normal ICDP，the hardness of carbide is increasing by adjusting the other elements and the graphite is refining by modification treatment of molten iron. Besides, the hardness fall of radial work layer is smaller.

At present the enhanced rolls are generally used as work rolls for finishing stands of 4-high hot strip mill, work rolls for roughing stands/finishing stands of hot strip mill and 4- high wide strip of reversing mill, work rolls for 4-high cold strip mill, work rolls/back-up rolls for tempering stands of 4- high hot strip mill and steckle mill. The rolling tonnage per millimeter is increased a lot compared to ordinary rolls due to good hardness fall and structural properties.

Typical Chemical Analysis and Mechanical Properties

The scope of supply

(φ500-1360)×(1350-5300)×11000

• High Chrome Cast Iron Rolls

The high Cr cast iron rolls are applied to work rolls for roughing/finishing stands of 4 -high medium, wide plate mill, work rolls for roughing/finishing stands of 4-high hot wide strip mill, work rolls/back-up rolls for tempering stands of 4- high cold and hot strip mill. The high Cr rolls are produced by centrifugal casting of three layers. The outer layer consists of high Cr white iron, the intermediate layer and core consist of SG. The material of outer layer has excellent wear resistance and good anti-fire and anti-spalling, resistance to banding defect and red hardness. cast iron rolls price

Typical Chemical Analysis and Mechanical Properties

• Enhanced High Cr Cast Iron Rolls

Compared to ordinary high Cr cast iron rolls, the enhanced ones add modification treatment and applied to work rolls for roughing/finishing stands of 4-high medium, wide plate mill, work rolls for roughing/finishing stands of 4- high hot wide strip mill, work rolls/back-up rolls for tempering stands of 4-high cold and hot strip mill. The modification treatment limits oxidation of the roll surface, concurrent occurrence with the banding and spalling in adverse thermal.

environment. The improved surface in the rolling cycle cause less scale spalls off the roll and is less sticky onto the rolled strip. less mill scale and less potential damage lead to smaller quantity of grinding that prolongs the service period. Therefore, the roll life is prolonged and longer roll campaign and less number of roll-change are achieved.

Typical Chemical Analysis

The scope of supply

(φ500-1360)×(1350-5300)×11000