technology & solution

Rolling mill rolls manufacturer

LMM GROUP Rolling mill rolls production factory have two roll production lines with world leading advantages: One is for cast rolls with the annual capacity of 50,000 tons; the other is for forged rolls with the annual capacity of 5,000 tons. We have advanced production and testing equipment at home and abroad and professional research & development team.

rolling mill rolls
rolling mill rolls
rolling mill rolls

chilled cast 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

LMM GROUP have been supplied to world’s top steel manufacturer :

Australia: Liberty steel/Bluescope steel
Iran: Oxin steel
Italy: JSW steel
United Arab EmiratesEmirates Steel
Egypt:Ezz Steel
Russia:MMK,Mechel, NLMK
Luxembourg:RIVA Group,ArcelorMittal
Turkey: Tosyalı Holding,İçdaş,Erdemir Group
Spain: Liberty Steel Group,CELSA Steel Group
India: tata-steel,SAIL, SPL,Erdemir Group 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

Indefinite chilled cast iron rolls

Chemical Analysis

Designation of rolls Material code C S Mn Ni Cr Mo
NiCrMo  (Ⅰ) CC Ⅰ 3.00-3.40 0.30-0.80 0.20-1.00 0.50-1.00 0.20-0.60 0.20-0.60
NiCrMo  (Ⅱ) CC Ⅱ 3.00-3.40 0.30-0.80 0.20-1.00 1.10-2.00 0.30-1.20 0.20-0.60
NiCrMo  (Ⅲ) CC Ⅲ 3.00-3.40 0.30-0.80 0.20-1.00 2.10-3.00 0.50-1.50 0.20-0.60
NiCrMo c (Ⅳ) CC Ⅳ 3.00-3.40 0.30-0.80 0.20-1.00 3.10-4.00 0.50-1.70 0.20-0.60

Physical Properties

Designation of rolls Material code Barrel hardness
(HSD)
Neck hardness
(HSD)
Tensile strength
(Mpa)
NiCrMo  (Ⅰ) CC Ⅰ 60-70 32-50 >150
NiCrMo  (Ⅱ) CC Ⅱ 62-75 35-52 >150
NiCrMo  (Ⅲ) CC Ⅲ 65-80 32-45 >350
NiCrMo (Ⅳ) CC Ⅳ 70-85 32-45 >350

Microstructure

Designation of rolls Material code Microstructure
NiCrMo (Ⅰ) CC Ⅰ Pearlite+cementite
NiCrMo  (Ⅱ) CC Ⅱ Fine pearlite+cementite
NiCrMo (Ⅲ) CC Ⅲ Fine pearlite+cementite
NiCrMo  (Ⅳ) CC Ⅳ Sorbite+cementite

Application

Designatian ot rolls Material code Application
NiCrMo  (Ⅰ) CC Ⅰ Section mill, bar mill, wire-rod mill narrow strip mill,finishing stand
NiCrMo  (Ⅱ) CC Ⅱ Section mill,bar mill, wire-rod mil narrow strip mill, finishing stand
NiCrMo  (Ⅲ) CC Ⅲ Section mill, bar mill, wire-rod mill narrow strip mill, finishing stand
NiCrMo (Ⅳ) CC Ⅳ Section mill, bar mill, wire-rod mill narrow strip mill, finishing stand

 

Product testing

Product packaging

Product production process

Static Cast Rolls

Centrifugal Cast Rolls

Forged Rolls

Production 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.

Product Brochure Download

About LMM

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.

We can provide characteristic service and differentiated products according to the different conditions of rolling mill.

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