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The products of LMM Group have been exported to more than 90 countries, countries & areas in America, Europe, Southeast Asia, the Middle East, Africa, Asia, etc, forming strong and core competitiveness in steelmaking, continuous casting, rolling areas to supply high value-added, green, intelligent and one-stop solution and service to global customers in iron, steel, metallurgical industries, etc.
LMM product segment
Please provide design data for special processing requirements
Core products: forged steel work rolls, forged steel intermediate rolls, forged steel backup rolls
Material: Cr2、Cr3、Cr5、HSS
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
Forged steel cold-rolled work rolls are important components of strip cold-rolling mills, and their properties directly affect the shape, surface quality and rolling production efficiency of cold-rolled sheets.
Application: Widely used in various domestic and foreign single-stand and continuous rolling mill units, rolling different products such as automobile sheet, silicon steel, stainless steel, aluminum foil and so on.
Material | hardness | Hardened layer depth | Hardness uniformity | |
Work rolls | 2%Cr,3%Cr,5%Cr | 85-102 HSD | 8~50mm | ±2HSD |
Application: Applied to high-precision 6-high and 8-high mills, its performance directly affects the shape of cold-rolled sheets
| Material | hardness | Hardened layer depth | Hardness uniformity |
Backup roller | 2%Cr,3%Cr,5%Cr | 70-88 HSD | 8~50mm | ±1HSD |
LMMGROUP support roller maximum diameter 1650mm
Application: Suitable for all kinds of four-high, six-high single-stand or multi-stand continuous rolling mills
Material | hardness | Hardened layer depth | Hardness uniformity | |
Intermediate Roll | 9Cr2Mo，86CrMoV7，CR-3A,CR-5A,CR-3B,CR-5B,CR-3C | 60-80HSD | ≥75mm | ±2HSD |
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
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.
From smelting to forging, the most advanced technology and equipment are used in the world
Equipped with world-class cold and hot processing equipment to ensure the process accuracy of high-quality rolls
ROLL Mill related accessories:
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
Continuous casting series：
Smart Steel Plant series：
