Active Member
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[China]
Address: Block 1, Beihuayuanjie, Chaoyang, Beijing 100024, China; market@sinosteelengineering.com
Contact name:
BEIJING SINO STEEL ENGINEERING & EQUIPMENT CO., LTD. |
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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.
| GRADE | MATERIAL | APPLICATION |
| C | 8CrMoV, 86CrMoV7, 85Cr2MoV, 9Cr2Mo, 9Cr2MoV, 9Cr2W , 9Cr3Mo, GCr15 | Common working roll |
| B | SKD11, DC53 | High wearability |
| A | M2, M7, M42, MC3, MC5, M2Co, DF3A | High wearability Excellent resistance to fire crack |
