Rolling Mill Rolls Production Process.ppt

Manufacturing Process:
Casting: Traditional method for producing rolls, involving pouring molten metal into molds.
Forging: Involves shaping metal using compressive forces, resulting in higher strength and toughness.
Heat Treatment: Processes such as quenching and tempering are used to enhance the mechanical properties of the rolls.
Machining and Grinding: Final shaping and surface finishing to achieve the required dimensions and surface quality.

1. LIAONING MINERAL & METALLURGY
GROUP CO.,LTD
LMM ROLLS

2. Content
1. Group Visualize
2. Group Profile
3. The uses of rolls
4. Production capacity
5. Production facility and instrument
6. Products
7. Reference list
8. Quality Certificate
LMM ROLLS

3. 1. Group Visualize LMM ROLLS

4. 2. Group Profile
Established in 1976, is an entirely state-owned, with more than 1500 staffs,
covers an area of 120000m2, including 50000m3 of building area.
manufactures a wide range of rolls that are used in different mills e.g. Hot
and Cold Strip Mill Rolls, Plate Mill Rolls, Section Mill Rolls, Narrow Strip
Mill Rolls , Sendzimir and Cluster Mill Rolland Aluminum Mill Rolls.
Focused product development technology leader in key products segment.
Rolls are manufactured through either a casting or a forging process.
The materials that are used include steel scrap, iron and various alloys (e.g.
chromium, nickel, molybdenum, vanadium, etc.)
LMM ROLLS

5. 3. The Uses of Rolls
Starting materialRolling operations Main end‐products
Billet
Bloom
Slab
Section Mill
Wire Rod Mill
Plate Mill
Hot strip mill
Roughing Stands
Hot Strip Mill
Finishing Stands
Cold Rolling Tandem mill
Cluster Mill
Rail Sheet pile, Shape bar
Wire Rod
Plate
Hot Rolled Coil and Sheet
Cold Rolled Coil and Sheet
Flat stainless steel
LMM ROLLS

6. 4. Production capacity
Annual sales, average €350 million USD
Cold strip mill rolls: 20,000 ton
Hot strip mill rolls: 45,000ton
Other rolls: 15,000 ton
Finished Roll weight: 160-85,000kg
Finished Roll Barrel Dia(max): 1800mm
Finished Roll(Full) Length( max): 4000mm
LMM ROLLS

7. 5. Production facility and instrument
Mill rolls shop has the following facility
Facility: 50KV electricity transformer stations, three 50t EAF& LRF
which is made in the Germany, and large oil hydraulic press,
horizontal centrifugal casting machine, dual-frequency hardening
machine , and roll grinding machine etc.
Machining rolls
Grinding machine
heat treatment furnace
Design
Hydraulic forging press Design50ton EAF
LMM ROLLS

8. 5. Production facility and instrument
Instrument: has installed modern equipment and techniques in order to monitor the
complete roll making process. These include:
Thermal analysis of the molten metal
Chill dressing measurements
Analysis of the ferrite content of chrome and HSS rolls at all stages of production
High-finish, thin-gauge stainless steel
We have established comprehensive databases and introduced statistical analysis of
these databases in order to monitor and improve the processes. LMM has invested in the
very latest equipment for obtaining accurate chemical data for analysis of both iron and
steel.
Final Inspection Process:
Dimensional Report
Chemical Analysis
Physical Properties
Ultrasonic Report
Hardness Report
Photo-micrographs
LMM ROLLS

9. 6. Products-Cast steel rolls
Item
Chemical Composition(%) Surface
Hardness(HSD) Tensile
Strength(MPA)
C Si Mn P S Ni Cr Mo Barrel Neck
AS60CrMnMo
0.55-
0.65
0.20-0.600.50-1.00 ≤0.035 ≤0.030 0.20-1.50 0.80-1.20 0.20-0.60 35～45 ≤45 ≥640
AS60CrNiMo
0.55-
0.65
0.20-0.600.50-1.00 ≤0.035 ≤0.030 0.20-1.50 0.80-1.20 0.20-0.60 35～45 ≤45 ≥640
AS65
0.60-
0.70
0.20-0.600.50-0.80 ≤0.035 ≤0.030 0.20-0.50 0.80-1.20 0.20-0.45 35～45 ≤45 ≥640
AS70Mn2
0.65-
0.75
0.20-0.451.40-1.80 ≤0.035 ≤0.030 35～45 ≤45 ≥600
AS70Mn2Mo
0.65-
0.75
0.20-0.451.40-1.80 ≤0.035 ≤0.030 0.20-0.45 35～45 ≤45 ≥680
AS75CrMo
0.70-
0.80
0.20-0.450.60-0.90 ≤0.035 ≤0.030 0.75-1.00 0.20-0.45 35～50 ≤45 ≥680
AS75CrNiMo
0.70-
0.80
0.20-0.600.50-0.80 ≤0.035 ≤0.030 0.20-0.50 0.80-1.20 0.20-0.45 36～45 ≤46 ≥690
AS75CrMo
0.70-
0.80
0.20-0.700.70-1.10 ≤0.035 ≤0.030 ≥0.20 0.80-1.50 0.20-0.60 35～50 ≤45 ≥700
Alloy cast steel rolls: made of high quality steel melted with EAF and finished with advanced
foundry and heat treatment technology. Our rolls have mechanical properties of high tensile strength,
excellent resistance to fire crack, high wearability and toughness. These rolls are used as rolls for
rougher, medium stands roll for section mills, working rolls of rougher and backup rolls of hot strip
mill, roll barrels are mainly composed of pearlite( temper sorbite) in the micro-stucture.
LMM ROLLS

10. 6. Products-Cast steel rolls
Item
Chemical Composition(%)
Surface Hardness
(HSD) Tensile
Strength
(MPA)
C Si Mn P S Ni Cr Mo Barrel Neck
ASB140
CrNiMo
1.50-1.70 0.30-0.60 0.80-1.30 ≤0.035 ≤0.030 0.50-1.20 0.80-2.00 0.20-0.60 35～50 ≤45 ≥590
ASB160
CrNiMo
1.50-1.70 0.30-0.60 0.80-1.30 ≤0.035 ≤0.030 0.50-1.20 0.80-2.00 0.20-0.60 40～60 ≤50 ≥490
ASB180
CrNiMo
1.70-1.90 0.30-0.80 0.60-1.10 ≤0.035 ≤0.030 0.50-2.00 0.80-1.50 0.20-0.60 45～60 ≤50 ≥470
ASR70
Mn2
1.80-2.00 0.30-0.80 0.60-1.20 ≤0.035 ≤0.030 1.00-2.00 0.80-3.50 0.20-0.60 50～65 ≤50 ≥460
Adamite rolls: is a materials, mechanical properties and carbon content of which stands
between steel and iron. Owing to it’s alloy elements such as Ni. Cr. Mo etc. There are some
amount of carbide in the matrix.
LMM ROLLS

11. 6. Products-Cast steel rolls
Item
Chemical Composition(%)
Surface Hardness
(HSD)
Tensile
Strength
(MPA)
C Si Mn P S Ni Cr Mo Barrel Neck
GS140SiCrNiM
o
1.30-1.50 1.30-1.60 0.50-1.00 ≤0.035 ≤0.030 ≥0.20 0.40-1.00 0.20-0.50 36～46 ≤46 ≥540
GS160SiCrNiM
o
1.50-1.70 0.80-1.50 0.60-1.00 ≤0.035 ≤0.030 0.20-1.00 0.50-1.50 0.20-0.80 45～55 ≤50 ≥490
GS190SiCrNiM
o
1.80-2.00 0.80-1.50 0.60-1.00 ≤0.035 ≤0.030 0.60-2.20 0.50-2.00 0.20-0.80 50～65 ≤50 ≥460
Graphite Steel Rolls: have excellent cracking resistance and anti-cold fatigue crack, wear
resistance and hardness drop small, which is the same as the adamite steel roll.
LMM ROLLS

12. 6. Products-Cast steel rolls
Item
Chemical Composition(%)
C Si Mn P S Ni Cr Mo
Chill Centrifugal Roll (Ⅲ)
2.90-
3.60
0.25-
0.80
0.20-
1.00
≤0.40≤0.08
2.01-
3.00
0.50-1.50
0.20-
0.60
Chill Centrifugal Roll (Ⅳ)
2.90-
3.60
0.25-
0.80
0.20-
1.00
≤0.40≤0.08
3.01-
4.50
0.50-1.70
0.20-
0.60
Indefinite Chill Centrifugal Roll (Ⅲ)
2.90-
3.60
0.60-
1.20
0.40-
1.20
≤0.25≤0.05
2.01-
3.00
0.70-1.20
0.20-
1.00
Indefinite Chill Centrifugal Roll (Ⅳ)
2.90-
3.60
0.60-
1.50
0.40-
1.20
≤0.10≤0.05
3.01-
4.80
1.00-2.00
0.20-
1.00
Spheroidal Graphitic Indefinite Chill Centrifugal Roll (Ⅰ)
3.00-
3.50
1.00-
2.00
0.60-
1.10
≤0.10≤0.03
1.50-
2.00
0.60-1.20
0.20-
0.60
Spheroidal Graphitic Indefinite Chill Centrifugal Roll (Ⅱ)
3.00-
3.50
1.00-
2.00
0.60-
1.10
≤0.10≤0.03
2.00-
2.50
0.60-1.20
0.20-
0.60
Spheroidal Graphitic Indefinite Chill Centrifugal Roll (Ⅲ)
3.00-
3.50
1.00-
2.00
0.60-
1.10
≤0.10≤0.03
2.50-
3.00
0.60-1.20
0.20-
0.60
Pearlitic (II)
2.90-
3.60
1.40-
2.20
0.40-
1.00
≤0.15≤0.03
1.50-
2.50
0.30-1.00
0.20-
0.80
SG Acicular
2.90-
3.60
1.00-
2.00
0.25-
0.60
≤0.10≤0.03
3.00-
3.80
0.20-0.80
0.60-
1.10
Centrifugal Casting Iron Rolls: Body has a higher surface hardness. As the outer centrifugal casting,
the hardness drop should be less than indefinite chill roll. At the same time the core has a higher
intensity by separate nodulizing, which can effective ensure that the rolled surface finish.
LMM ROLLS

13. 6. Products-Cast steel rolls
High Speed Steel Rolls: have high hardness and good wear resistance at high temperatures. These
types of rolls are used for finishing stands to increase productivity and improve surface quality of rolled
piece
Item
Chemical Composition(%)
Barrel
(HS)
Tensile
Strength
(MPA)
C Si Mn W V Nb Ni Cr Mo Mg Mo
Work
Layer
1.6-2.00.2-1.00.3-1.11.5-2.54.0-6.00.5-1.20.5-1.5
4.0-
8.0
0.20-0.60
0.20-
0.60
80～85700-900
Core 3.2-3.61.9-2.30.3-0.7 0.3-0.7≤0.200.20-0.60≥0.05
0.20-
0.60
≥400
LMM ROLLS

14. 6. Products-Cast steel rolls
Cast Iron Rolls: As heat treatment process, roll has high strength. A combination of excellent wear-
resistant and of cracking resistance performance can effectively improve the life of rolls
Item
Chemical Composition(%)
Surface
Hardness
Tensile
(HSD) Strength
C Si Mn P S Ni Cr Mo BarrelNeck (MPA)
Cast Iron Roll I 2.90-3.60 0.80-2.50 0.40-1.20 ≤0.25 ≤0.03
0.50-
1.00
0.20-0.60
0.20-
0.80
48-70 35-55 ≥320
Cast Iron Roll II2.90-3.60 0.80-2.50 0.40-1.20 ≤0.20 ≤0.03
1.01-
2.00
0.30-1.20
0.20-
0.80
48-70 35-55 ≥320
Cast Iron Roll 2.90-3.60 0.80-2.50 0.40-1.20 ≤0.25 ≤0.03 0.20-0.60
0.20-
0.60
50-70 35-55 ≥320
Pearlitic (I) 2.90-3.60 0.80-2.50 0.40-1.20 ≤0.25 ≤0.03 0.20-0.60
0.20-
0.60
50-70 35-55 ≥320
Cast Iron Roll I: Spheroidal Graphitic Indefinite Chilled Roll(Ⅰ)
Cast Iron Roll II: Spheroidal Graphitic Indefinite Chilled Roll (Ⅱ)
Cast Iron Roll: Spheroidal Graphitic Indefinite Chilled Roll (Ⅱ)
LMM ROLLS

15. 6. Products-Forged steel rolls
Forged Roll Manufacturing Process
LMM ROLLS

16. 6. Products-Forged steel rolls
Application of Rolls:
Heat Treatment Process:
Mechanical Properties after Refining:
Yield strength (MPA) Tensile strength (MPA) Elongation (%) Reduction of area (%) Charpy (J/㎠) Hardness (Hв)
Work Roll 660 660 660 660 660 660
Backup Roll 550 550 550 550 550 550
Distribution of Hardness in the Work Roll (Ex): Surface Hardness Transition Curve:
LMM ROLLS

17. 6. Products-Forged steel rolls
Forged rolling mill rolls for cold-rolling sheet mills
Rolling mill rolls for production of steel, tin, aluminum, steel plate and copper in Tandem, Temper, Skin Pass and eversible mills.
Standard diameters between 300mm and 950mm
Maximum weight 15t
Hardening options:
Progressive low frequency induction
Conventional, by total heating of barrel and pressured water quenching
Sub-zero treatment down to -120 deg. C
2.5%, 3.0% and 5.0% Cr steel alloys
Surface hardness 90/100 shore C
Hardness penetration to 90mm (diameter)
Forged rolls for hot rolling of aluminum and copper
As for cold rolling. Hardness range 60/80 shore C.
Forged steel back-up rolls
For hot and cold strip mills.
Main features:-
•Barrel diameter to 1700mm
•Maximum weight 60t
•Quenching system: Flash heating and water,
•or spray, cooling
•3% and 5% Cr steel alloys
•Surface hardness: 55/70 shore C
Forged rolls for hot rolling of engineering steels
•Maximum diameter: 1700mm CrMo and CrNiMo steels
•Hardening: conventional
LMM ROLLS

18. 6. Products-Aluminum Mill Roll
Aluminum Mill Roll : Aluminum foil has a complicated production engineering and high technical
requirement. Aluminum foil of high strength possesses "three top" feature--high request for
hardness(HSD100—105），high requirement for hardness homogeneity（≤2HSD），and
demanding concentricity, roundness, cylinder（≤0.003 mm）. These attribute to a high production
difficulty.
Relying on the rich experience in rolling non-ferrous metal, combining the work characteristics of
rolling aluminum foil,Changzhou roll has developed rolls for aluminum foil and plate in different
material and specifications by breaking through key and core technology, thanks to the 10-odd year
system integration and a full configuration of various advantageous resources available. The
company boastspartnership with numerous aluminum factories at home and abroad.
Material Feature application
CBRWR-AR High accuracy, high hardness Roll mill for aluminum product
LMM ROLLS

19. 6. Products-Sendzimir and Cluster Mill Roll
The material of Sendzimir work roll is tool steel, die steel and high-speed steel. These are materials
of high hardness . The rolls are manufactured under quenching and tempering processes of high
temperature . During the tempering process, secondary hardening is used to reach hardness of60-
63HRC, 61-64 HRC, 63-66HRC etc, for different work rolls .
High hardness tool steel and die steel are used as raw materials for Sendzimir intermediate roll. The
rolls are also manufactured under quenching and tempering process of high temperature. During
tempering process, secondary hardening is used to reach hardness of55-60HRC for
differentintermediate rolls.
Name Type of material Hardness
Sendzimir work roll tool steel, die steel and high-speed steel 60-66HRC
Sendzimir intermediate roll tool steel, die steel and high-speed steel 55-60HRC
LMM ROLLS

20. 7. Reference list-customer
LMM ROLLS
Item Customer Country Qty. pcs Year
1 Baosteel Group China 246 Aug.2010
2 Anshan iron&steel China 268 May.2010
3 Laiwu iron&steel China 50 Sep.2010
4 Qingdao special steel China 96 Sep.2010
5 Panzihua iron&steel China 234 Nov.2010
6 Lianyuan iron&steel China 138 Jan.2010
7 Chongqing iron&steel China 80 Feb.2010
8 Tangshan iron&steel China 300 Feb.2010
9 Voestalpine AG Austria 12 Mar.2006
10 Sibirsky Aluminium Company Russia 26 Sep.2009
11 Poltavsky Ore Mining and Processing Enterprise Ukraine 49 Jun.2008
12 Ishtiaq, Pakistan 23 Jan.2010
13 Campic Pakistan 10 Feb.2009
14 ASIA Bangladesh 9 Mar.2010
15 LARCO Greece 58 Dec.2009
16 Evraz South Africa 6 Feb.2010
17 Columbus Stainless South Africa 20 Feb.2010
18 AHMSA, Mexico Mexico 105 Jun.2009
19 Enprotech USA 36 Oct.2009
20 Gecosteel, Syria 105 Aug.2010
21 Sidensor S.A Greece 60 May.2008
22 Egyptian iron&steel Egypt 10 Sep.2009
23 Indian Smelting&Refining India 3 May.2007
24 STOMANA industry Bulgaria 101 Jan.2010

21. 7. Reference list-Order
LMM ROLLS

22. 6. Reference list-performance confirmed
LMM ROLLS

23. 6. Quality Certificate
LMM ROLLS
Add:7G LIYUAN BUILDING,NO.16 MINGZE STREET, DALIAN P.R.CHINA
TEL: [phone]
FAX: [phone]
MOBILE: [phone]
E-mail: [email protected] / [email protected]
website: www.lmmgroupcn.com