The world No. 1 in crude steel production steel plant, over 70% of the HSS for bar and wire are from us.

One Stop Solution for Rolling Mill rolls

WE can provide characteristic service and differentiated products according to the different conditions of rolling mill.

High Speed Steel Rolls (HSS rolls)

  • The world No. 1 in crude steel production steel plant, over 70% of the HSS for bar and wire are from us.

  • HSS rolls the amount of steel passing in a single groove (times) is 3 to 5 times that of cast iron rolls.

The high-speed steel rolls produced by our company are widely used in:

Finished stand (high-speed steel roll), pre-finished stand (high-speed steel roll), slitting stand (slicing high-speed steel roll), pre-slicing stand (slicing high-speed steel roll).

High-speed wire rod mill pre-finishing line. Hot rolling narrow strip mill finishing line.

Spring flat steel rolling mill finishing rolling stands and angle steel, channel steel and other small section steel rolling mills.

Enhanced high speed steel rolls

Slitting high speed steel rolls

High alloy high speed steel rolls
high speed steel rolls
KOCKS- roller ring
High line prefinishing roller ring
Pinch roll ring

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.

Professional high speed steel roll manufacturer

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

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One of the largest domestic enterprises specializing in the production of high-performance high-speed steel products.

The company’s production base covers an area of about 100 acres. The annual production capacity of high-performance high-speed steel products to 15,000 tons.

The company has nearly 300 employees, including 15 senior technical personnel. It has more than 50 sets of intermediate frequency furnaces, centrifuges, heat treatment furnaces, and numerical control processing equipment. It also has a physical and chemical analysis center equipped with various advanced inspection and testing equipment such as direct-reading spectrometers.

We sincerely hope that our products will make a greater contribution to improving the product quality and economic benefits of users. We are determined to become a high-quality and loyal partner of the majority of users in the steel industry.

The company has established long-term close cooperation relations with Beijing University of Technology, Beijing University of Science and Technology, General Steel Research Institute and other institutions. Over the years, we have been working together to develop and innovate the production process and materials of high-performance high-speed steel. The high-speed steel rolls and roll rings produced by the company have successively obtained national patents

Rolling mill rolls product

Classification by roll material:

Cast iron mill rolls

  • Alloy indefinite chilled cast iron rolls
  • Alloy chilled cast iron rolls
  • Alloy SG ductile cast iron roll
  • Pearlitic ductile cast iron roll
  • Bainite ductile cast iron roll
  • Centrifugal cast iron roll

Cast steel mill rolls   

  • Alloy cast steel rolls
  • Semi-steel roller
  • Graphite steel rolls
  • High-chromium steel roll
  • High-speed steel roll

Forging mill rolls

Sort by position on the rolling mill:

Work rolls
backup rolls

Intermediate roll

Product advantage

The world No. 1 in crude steel production steel plant, over 70% of the HSS for bar and wire are from us.

LMM high-speed steel rolls have higher steel passing per groove (times) due to their good wear resistance, which saves roll changing time, improves rolling mill operation rate, reduces roll consumption, and improve the overall efficiency of the factory.
Generally, the amount of steel passing in a single groove (times) is 3 to 5 times that of cast iron rolls.

The company has a raw material analysis center, a rapid analysis center, and a physical test center, which strictly controls the process quality and performance testing of product production, and meets the user’s various quality testing needs for the company’s products. And it provides modern advanced means for the company’s product performance quality control and technology research and development.

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Established in 2007 professional high speed steel roller

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Advanced inspection and testing processing equipment

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Covers an area of 100 mu and has more than 300 employees

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The products are used in more than 200 rolling production lines

Meet the largest specification of casting roll Φ1400X4600X9000

  • 20T/30T dual power inverter intermediate frequency electric furnace
  • lOT, 5T, 3T intermediate frequency electric furnace, a total of 8
  • 60T LF ladle slightly smelting furnace
  • 60TVD vacuum refining furnace
  • V.C vacuum casting furnace
  • Equipped with advanced Spraying and sand casting equipment

Strictly control the uniformity of furnace temperature to ensure the consistency of roll hardness.

The equipments all use computer centralized control automation system

  • 30 numerically controlled resistance high low temperature heat treatment furnaces
  • Spray quenching equipment
  • Open differential temperature heat treatment furnaces
  • Gas baking furnaces

To meet various precision and requirements

Equipped with:

  • Over 20 large-sized imported NC grinding machines
  • Large-medium sized NC lathes
  • Large-medium sized NC planer-type double-side milling machines
  • As well as over 100 dedicated lathes for various rolls of C61250, C61200, C61125, C84180, C84160, C8463, C8440 and C91250 and etc.

Whole process quality and inspection system from raw materials to finished rolls

The whole process implements computer information collection and feedback processing.

Equipped with

  • American Leco CS230 carbon and sulfur analyzer,
  • German Bruker Q8 direct reading spectrometer,
  • Japanese Shimadzu MNV-2T golden microscope,
  • German KK USD12 ultrasonic flaw detector, and etc.


Our Client Say?

The trial data shows that the ∮370mm high-speed steel roll produced by LMMGROUP has far exceeded the single-groove assessment value of 1,500 tons in the “Roll Ordering Technical Agreement”, and the effect is good.

On September 10, 2015, in the rolling process of the steel rolling mill, the LMMGROUP high-speed steel bar rolling experiment was carried out on the first bar line C12 to four cuts, and C14 three cuts to K1, K2, K3, and K4. According to the trial situation, The average amount of steel passing through LMMGROUP rolling is about 50%-60% of the alloy rolling spoke. The processing difficulty of high-speed steel is low, and the processing cost is lower than that of the alloy rolling wheel. Our factory can achieve normal processing.

LMM GROUP 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

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.

Contact US Now !

We would be happy to help and advise if you have any questions or inquiries.