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


Professional Hss rolls manufacturer with 20 years of production experience. 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.WE can provide characteristic service and differentiated products according to the different conditions of rolling mill.


The unique advantages of HSS ROLLS

High-speed steel roll materials contain relatively high alloying elements such as vanadium, tungsten, chromium, molybdenum, and niobium. The main types of carbides in the roll structure are MC type and M2C type. The carbides have high hardness and good wear resistance. Compared with traditional ductile iron rolls and high nickel-chromium rolls, the steel passing capacity of a single groove (times) is high, which saves the time of changing rolls, improves the operating rate of the rolling mill, reduces roll consumption, reduces production costs, and improves the overall benefits of the factory. .

High-speed steel rolls have good thermal stability. At the rolling temperature, the roll surface has high hardness and good wear resistance.

Since the core of the centrifugally cast high-speed steel roll is made of alloy ductile iron material, the roll neck has high strength.

The high-speed steel roll has good hardenability, and the hardness almost does not drop from the surface of the roll body to the inside of the working layer, so that the roll has equally good wear resistance from the outside to the inside.

During the use of high-speed steel rolls, under good cooling conditions, a thin and dense oxide film is formed on the surface of the roll body. This uniform, thin and dense oxide film can exist for a long time without falling off, making the high-speed steel rolls durable. Grindability is improved.

The high-speed steel roll material has a large expansion coefficient and good thermal conductivity. During the rolling process, the roll wears slightly along with the rolling groove. At the same time, due to the expansion of the high-speed steel material itself, the pass shape continues to become smaller. Therefore, the high-speed steel roll is During the rolling process, the rolling groove changes little, and the consistency of the pass size is maintained for a long time. Especially when rolling bars or rebars, it is more conducive to controlling the negative tolerance of the rolled material.

high speed steel rolls

High-strength high-speed steel roll

Recommended to be used in: Finishing rolling stand and Pre- finishing rolling stand

high speed steel rolls

Slitting high-speed steel rolls

Recommended to be used in: Cutting rolling stand and Pre- Cutting rolling stand

hss rolls

High-speed steel rolls

Recommended to be used in: Finished rolling stand 

The Hss rolls produced by our company are widely used in:

  • The finished product stand (high-speed steel rolls), finished product front stand (high-speed steel rolls), slitting stand (slit high-speed steel rolls), and pre-slitting stand (slit high-speed steel rolls) of the bar rolling mill.
  • High-speed wire rod rolling mill pre-finishing unit. Hot-rolled narrow strip steel mill finishing rolling unit.
  • Spring flat steel rolling mill finishing rolling stand and angle steel, channel steel and other small section steel rolling mills.
chemical compositionCSiMnCrNi
chemical compositionMoVWPS

Enterprises specializing in the production of high-performance mill rolls

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, NLMK, MMK, etc. We do OEM for Concast and Danieli for a long time

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.

Recommended Products

The world No. 1 in crude steel production steel plant, over 85% of the HSS ROLLS 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 3-5times than normal cast iron rolls.

How to find a trustworthy Adamite rolls manufacturer
If you want to find a trustworthy adamite rolls supplier with long-term cooperation, maybe you need to concern about as the following

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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.

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

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 :

United Arab EmiratesEmirates 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

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.