Based in China, LMM is one of the largest manufacturers of forged rolls in CHINA, producing up to 30.000 tons of rolls every year.
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
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
Process schedule with ETD date
QC checking of each process
Photos &videos of each process
ISO 9001 certificate
The third party Checking
High – speed steel roll material is high in vanadium, chromium, tungsten, molybdenum and other alloy elements. The type of carbide in roll is mainly MC or M2C. Has good thermal stability, high hardness. good wear resistance and harden ability, from internal to the work roll surface layer hardness almost no change, so as to ensure the roll from out side to inside are equally good abrasion resistance
Physical properties and applications
Hardness of roll body
Roll neck tensile strength
Hot strip rolling, bar finishing rolling, section steel universal rolling mill, high speed wire pre finishing rolling
Hot strip rough rolling work roll, cold strip rolling work roll, intermediate roll
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.
Core competitiveness: Promote brand by quality
The company’s good hardware facilities are the strongquarantee of high quality products. has introduced theinternational advancedlevel of casting processingequipment. set up with a complete set of intelligentmodernization and standardization of productionprocess,intelligent production operation and perfectquality control system,ensure the quality, fundamentallyguarantee the implementation of the enterprise branostrategy.
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
Strictly control the uniformity of furnace temperature to ensure the consistency of roll hardness.
The equipments all use computer centralized control automation system
To meet various precision and requirements Equipped with:
Whole process quality and inspection system from raw materials to finished rolls
The whole process implements computer information collection and feedback processing.
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.
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
The company strictly according to modern enterprise management requirements set up a perfectquality assurance system, and passed the ISO9001:2008 quality management system certification,ISO14001:2004 environmental management system certification, OHSAS18001:1999 occupationalhealth and safety management system certification.
Professional engineers provide solutions and technical drawings
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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