High hardness work roll, steel rolls , forging rolls, iron rolls

High hardness work roll, steel rolls , forging rolls, iron rolls

Brand name: LMM GROUP
Packing Details : Wooden box with fumigation or Wooden Fram
Delivery Details: 30~60days or Based on the quantity
Shipping: Sea freight、Land freight、Air freight
Customization:
Customized logo(Min. Order 1 piece)
Customized packaging(Min. Order 1 piece)
Graphic customization(Min. Order 1 piece)
Checking report: Material Report、Hardness Report、UT/MT Report、Dimensions checking report、Mechanical Property Test Report
Processing technology: casting, forging

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

Manufacture drawing

Process schedule with ETD date

QC checking of each process

Checking report

Photos &videos of each process

ISO 9001 certificate

Warranty Time

The third party Checking

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).

physical index

Designation of rolls

Material

Barrel hardness HSD

Neck hardness HSD

Tensile strength Mpa

work rollⅠ

HCrⅠ

60-75

32-45

>350

work roll  (Ⅱ)

HCrⅡ

65-80

32-45

>350

work roll (Ⅲ)

HCrⅢ

75-90

32-45

>350

work roll

HCrS

70-85

35-45

≥450

chemical index

Designation of rolls

Material

C

Si

Mn

Ni

Cr

Mo

work rollⅠ

HCrⅠ

3.00-3.30

0.30-1.00

0.50-1.20

0.70-1.70

12.00-15.00

0.70-1.50

work rolll (Ⅱ)

HCrⅡ

3.00-3.30

0.30-1.00

0.50-1.20

0.70-1.70

15.01-18.00

0.70-1.50

work rolll(Ⅲ)

HCrⅢ

3.00-3.30

0.30-1.00

0.50-1.20

0.70-1.70

18.01-22.00

1.51-3.00

Work roll

HCrS

1.00-1.80

0.40-1.00

0.50-1.00

8.00-15.00

0.50-1.50

1.50-4.50

Microstructure

Designation of rolls

Material

Microstructure

Work rollsⅠ

HCrⅠ

Bainite +carbide

Work rolls (Ⅱ)

HCrⅡ

Bainite +carbide

Work rolls(Ⅲ)

HCrⅢ

A small amount of bainite + martensite + carbide

Work rolls

CS

tempered martensite + carbide sorbite

Company

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.

production workshop

Equipment

Technical excellence in our core competencies – melting, casting, forging, heat treating and machining – allows us to provide a superior product and meet the most demanding requirements of our customers.

Meet the largest specification of casting roll Φ1400X4600X9000

  • 20T/30T dual power inverter intermediate frequency electric furnace
  • lOT, 5T, 3T intermediate frequency electric furnace, a total of 8
  • 60T LF ladle slightly smelting furnace
  • 60TVD vacuum refining furnace
  • V.C vacuum casting furnace
  • Equipped with advanced Spraying and sand casting equipment

Strictly control the uniformity of furnace temperature to ensure the consistency of roll hardness.

The equipments all use computer centralized control automation system

  • 30 numerically controlled resistance high low temperature heat treatment furnaces
  • Spray quenching equipment
  • Open differential temperature heat treatment furnaces
  • Gas baking furnaces

To meet various precision and requirements

Equipped with:

  • Over 20 large-sized imported NC grinding machines
  • Large-medium sized NC lathes
  • Large-medium sized NC planer-type double-side milling machines
  • As well as over 100 dedicated lathes for various rolls of C61250, C61200, C61125, C84180, C84160, C8463, C8440 and C91250 and etc.

Whole process quality and inspection system from raw materials to finished rolls

The whole process implements computer information collection and feedback processing.

Equipped with

  • American Leco CS230 carbon and sulfur analyzer,
  • German Bruker Q8 direct reading spectrometer,
  • Japanese Shimadzu MNV-2T golden microscope,
  • German KK USD12 ultrasonic flaw detector, and etc.

Quality, Environmental ISO Certificate

Forged steel roll technical Process:

Electric arc furnace smelting → LF \ VD refining → ingot casting → annealing → cleaning → electroslag remelting → annealing → forging → post forging heat treatment → rough machining → preliminary heat treatment → semi finishing → dual frequency quenching or differential temperature treatment → cryogenic treatment → tempering → finishing → packaging and delivery.

Double refining + electroslag remelting to ensure good metallurgical quality

Perfect heat treatment and cold treatment technology to ensure the depth and hardness uniformity of hardened layer

Cast rolls technical Process:

Modeling → smelting → centrifugal casting → cleaning → preliminary heat treatment → rough machining → differential heat treatment → finishing → packaging and delivery.

Temperature controlled cooling + annealing treatment after casting:
the microstructure transformation is more sufficient and the stress state is more stable.

The composition of the working layer adopts multi-element micro alloying technology:
 which takes into account wear resistance and accident resistance, and has better comprehensive performance.

The multi-layer composite technology: is adopted to effectively block the diffusion of high alloy content in the working layer to the core structure and ensure the strength and toughness of the core structure.

Differential heat treatment technology: is adopted to make the microstructure change fully and the stress distribution more stable and reasonable.

At LMM GROUP, we are ready to troubleshoot and solve any challenge you have. Whether you require a standard or custom work roll, our superior manufacturing process always results in superior rolls for your leveling equipment, unsurpassed strength, and reliability, LMM for work rolls that will keep your production moving forward, even in the most demanding applications.

Work on site

Need For Some Help ?

Professional engineers provide solutions and technical drawings

phone

86(411) 84174804

mail

lmme-business@lmmgroup.com.cn

Special product design, please send specific data and drawings to our mailbox or form.

As professional one-stop solution provider, LIAONING MINERAL & METALLURGY GROUP CO., LTD(LMM GROUP) Established in 2007, and focus on engineering research & design, production & delivery, technology transfer, installation & commissioning, construction & building, operation & management for iron, steel & metallurgical industries globally. 

Our product 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

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