LMM chill iron 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).Chilled cast iron rolls are mainly suitable for Section mill、bar mill、intermediate and finishing stands of wire-rod mill
physical index
Designation of rolls | Material | Barrel hardness HSD | Neck hardness HSD | Tensile strength Mpa |
CrMo indefinite chilled cast iron rolls | IC | 50-70 | 35-55 | ＞160 |
NiCrMo indefinite chilled cast iron rolls (Ⅰ) | ICⅠ | 55-72 | 35-55 | ＞160 |
NiCrMo indefinite chilled cast iron rolls（Ⅱ） | ICⅡ | 55-72 | 35-55 | ＞160 |
NiCrMo indefinite chilled cast iron rolls（Ⅲ） | ICⅢ | 65-78 | 35-55 | ＞350 |
NiCrMo indefinite chilled cast iron rolls（Ⅳ） | ICⅣ | 70-83 | 35-55 | ＞350 |
NiCrMo indefinite chilled cast iron rolls（Ⅴ） | ICⅤ | 77-82 | 35-55 | ＞350 |
NiCrMo chilled cast iron rolls (Ⅰ) | CCⅠ | 60-70 | 32-50 | ＞150 |
NiCrMo chilled cast iron rolls (Ⅱ) | CCⅡ | 62-75 | 35-52 | ＞150 |
NiCrMo chilled cast iron rolls（Ⅲ） | CCⅢ | 65-80 | 32-45 | ＞350 |
NiCrMo chilled cast iron rolls（Ⅳ） | CC Ⅳ | 70-85 | 32-45 | ＞350 |
chemical index
Designation of rolls | Material | C | Si | Mn | Ni | Cr | Mo |
CrMo indefinite chilled cast iron rolls | IC | 3.1-3.4 | 0.6-0.9 | 0.5-1.0 |
| 0.7-1.1 | 0.2-0.6 |
NiCrMo indefinite chilled cast iron rolls (Ⅰ) | ICⅠ | 3.1-3.4 | 0.6-0.9 | 0.5-1.0 | 0.6-0.8 | 0.7-1.1 | 0.2-0.6 |
NiCrMo indefinite chilled cast iron rolls（Ⅱ） | ICⅡ | 3.1-3.4 | 0.6-1.0 | 0.5-1.0 | 2.2-2.8 | 0.7-1.1 | 0.2-0.6 |
NiCrMo indefinite chilled cast iron rolls（Ⅲ） | ICⅢ | 3.1-3.4 | 0.6-1.0 | 0.5-1.0 | 2.2-2.8 | 0.8-1.3 | 0.2-1.0 |
NiCrMo indefinite chilled cast iron rolls（Ⅳ） | ICⅣ | 3.1-3.4 | 0.6-1.0 | 0.5-1.0 | 3.1-4.3 | 1.0-1.3 | 0.2-1.0 |
NiCrMo indefinite chilled cast iron rolls（Ⅴ） | ICⅤ | 3.1-3.4 | 0.8-1.2 | 0.5-1.0 | 3.8-4.5 | 1.4-2.0 | 0.2-1.2 |
NiCrMo chilled cast iron rolls (Ⅰ) | CCⅠ | 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 chilled cast iron rolls (Ⅱ) | CCⅡ | 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 chilled cast iron rolls（Ⅲ） | CCⅢ | 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 chilled cast iron rolls（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 |
Microstructure
Sorbite tempered bainite + carbide + graphite + A small amount of martensite or bainite + carbide + graphite
About 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 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
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.
Equipped with
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 chill iron rolls, our superior manufacturing process always results in superior rolls for your leveling equipment, unsurpassed strength, and reliability, LMM for chill iron rolls that will keep your production moving forward, even in the most demanding applications.
Request For Quotation
Please provide design data for special processing requirements
If you want to find a trustworthy adamite rolls supplier with long-term cooperation, maybe you need to concern about as the following
1.Mill rolls equipment
The equipment plays an important role in the high-quality mill rolls. Types of equipment matters from the beginning to the finished products.
2.Quality Control
Different stages of production have to follow controlling parameters to ensure that the production department is working with the required efficiency. To get the quality mill roll, quality is absolutely necessary
3. Technological Advancement of the manufacturer
A reliable manufacturer will focus on technological advancement for its long-lasting development. The advanced technology can guarantee the improvement of products. The best supplier not only can provide high-standard products but also is the steel solution provider. Before choosing the company you should ensure the manufacture has a professional team for advanced technology.
4. Delivery time and price of the companyDelivery time often is the main factor to choose the supplier. Delivery on-time is also the basis of next time cooperation. Checking out the place of the company and the delivery term is essential. Price is also an important element for a best-value mill roll manufacturer.
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.
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
We would be happy to help and advise if you have any questions or inquiries.
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