Medium and thick plate work roll

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
Italy: JSW steel
United Arab Emirates：Emirates 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	√

Features
Medium and thick plate work roll
LMM GROUP has the world’s most advanced 5000mm high-temperature, quenching and cooling equipment, and has successfully developed a series of medium-thick plate work rolls through the application of various material designs and process methods. Pushing the medium and thick plate roll materials (high chromium series and high-speed steel) to a higher level. It has a maximum production capacity of Φ1600×6000×12000mm wide and thick plate work rolls.

The new generation of medium-thick plate work rolls has obtained a higher-strength martensitic structure, which meets the needs of high-strength steel rolling and solves the problems of traditional materials with poor wear resistance and hot crack resistance. The roll replacement cycle is extended and the single roll consumption is reduced. The oxide film on the roll surface of the product is well formed and dense, showing good roll surface and roll shape retention capabilities; providing a guarantee for rolling high-strength steel and high-surface quality steel plates.

Effect
The development and application of high-speed steel products in medium and thick plate work rolls has greatly promoted the development of rolls and steel rolling industries.

LMM GROUP new generation medium and heavy plate roll products have been supplied to major medium and heavy plate rolling lines across the country and exported to India, Pakistan, Mexico, Turkey, etc. The varieties cover medium and wide plate and steckel rolling lines to meet the rolling needs of high-strength steel. It has epoch-making significance in the upgrading of medium and thick plate work roll materials.

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

PRODUCT

ABOUT LMM GROUP

LMM is the professional manufacturing plant, Founded in 2007, which is producing and supplying metallurgical rolls for iron and steel industry. The registered capital of the company is RMB 112,383,000,the total assets more than 1,000,000,000 and the company covers area of 400,000 ㎡ with staff more than 1000.

LMM GROUP is one of the professional roll manufacturing base in China, which supply all kinds of large-size rolls for iron and steel enterprises with production capacity of 100,000 tons of all kinds of hot strip mill rolls, section mill rolls, rod mill rolls, cold rolling mill rolls, casting and forging backup rolls.

Product advantages

LMM GROUP’s roll production technology originates from United Electric Steel’s Davie Company in the United States, which has developed the world’s most advanced metallurgical powder technology, making the metallographic structure more dense.

Good economic benefits
Stable rolled strip profile
Good surface quality
High dimension accuracy
Expert technical advise
Good wear resistance
Prolonged service period
High safety factor

Casting production of rolls

The company adopts conventional casting、grooved mould casting and centrifugal casting(horizontal、vertical)methods for roll production. The major production process is adoptive of advanced computer control technology and the system is automatically controlled, which ensures homogeneity of process Control and homogeneity of product quality.

The maximum dimension of rolls produced by the large vertical spin-caster is φ1350×5300×11000, which meets the requirement of hot plate mill and CSP mill work rolls.

The company can supply customer with high wear resistance and stablity, high-strength quality rolls .

Heat Treatment of Rolls

Heat treatment furnaces are independently numerically controlled and centrally computer controlled.Heat treatment of strip mill rolls is adoptive of process and technology imported from Davy Roll UK.

Machining of Rolls

Advanced high-accuracy machine tools plus experienced turning techniques and control technology meet high requirements demanded by roll manufacturing accuracy.

Inspection of Rolls

The company set up”roll inspection & research center”, quality control of rolls and inspection are carried out .

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

Pre-Sales Service

* Inquiry and consulting support.

* Planning layout and Design requires machinery

* Welcome visit our Factory.

* The production process and before leaving the factory, all performance indicators are strictly tested, and the professional QC team controls according to the process.

After-Sales Service

* Engineers available to service machinery overseas.

* IN-TIME delivery goods.

* The quality is tracked throughout the process, and the installation and use are guided throughout the process.

* Long-term technical support.

* Stick to the agreement, do not do anything that violates the agreement, stick to the spirit of the contract to the end.

LMM GROUP is one of the professional roll manufacturing base in China, which supply all kinds of large-size rolls for iron and steel enterprises with production capacity of 100,000 tons of all kinds of hot strip mill rolls, section mil rolls, rod mil rolls, cold rolling m rolls, casting and forging backup rolls.

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Medium and thick plate work roll

Work Rolls of Hot Strip Mill (9)

Conventional Mill Rolls (4)

Cold Rolling Strip Mill Rolls (3)

Back up Roll (2)