Forged Steel Rolls applying for hot rolling mill 2hi 4hi 6hi 8hi 12hi 14hi 18hi 20hi

FORGED ROLLS

Production equipment:

Introduction furnace: 25tx8sets, 10t/3tx5sets

EAF: 30tx5sets

LF furnace: 50-70tx8sets

Large send Foundry equipment: 20 sets

Large & Middle size heat treatment: 50 sets

Large & Middle size centrifugal casting machine: 20 sets

Large & Middle size CNC & Heavy machine: 235 sets

Testing equipment: 35 sets

Production capacity: 150000Tons/Annual

TYPE & Size:

Cast roll & RING:

Backup roll: Max. Dia. 2000mm; Max weight 80t/pc,

Work roll: Max. Dia. 1600mm; Max. Barrel length 6500mm;

Max weight 85t/pc

Others: as per customer’s requirement.

Forged roll & RING:

Work roll for Cold Rolling mill: Max. Dia. 1100mm; Max weight 25t/pc,

Work roll for Hot Rolling mill: Max. Dia. 1600mm; Max weight 75t/pc

Backup roll for Hot Rolling mill: Max. Dia. 2000mm; Max weight 75t/pc

Others: as per customer’s requirement.

Melting

The alloy ingot for the blank of the forged steel rolls is usually melted by electric arc furnace. Through the oxidization, restoration and adjustment to the ingredients of the steel liquid, slagging reaction and slagging-off will reduce the content of harmful elements, thus to get qualified steel liquid. The demoulded steel ingot can go to next step after its surface is finished and cleaned.

Forging

The qualified steel ingot is pressed to the roll blank by the hydraulic forging machine after pre-heating, heating and even heating. The purpose of forging and pressing process is: the forging and pressing can reduce and compress the porosity, shrinkage and some pore; improve the macroscopic segregation (pattern segregation, V shape segregation) in the original structure of the steel ingot; shatter the gross liquation carbide and net carbide; crush and refine the gross grain. In order to acquire the optimized feature of the roll, we strictly control the forging ratio , not less than 3 for work rolls while more than 2.5 for large size backup rolls.