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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
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
Customization:
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
Manufacture drawing | √ |
Process schedule with ETD date | √ |
QC checking of each process | √ |
Checking report | √ |
Photos &videos of each process | √ |
ISO 9001 certificate | √ |
Warranty Time | √ |
The third party Checking | √ |
Cemented carbide roll rings (also known as tungsten carbide roll ring) possesses good thermal conduction property. Compared with pther materials, it is much better in terms of heat-resistance, wear-resistance and strength. What’s more, it shardness reduces a little under the condtion of high temperature. So, the cemented carbide roll rings is invented with the ap-pearance of high speed wire rod mill. With the development and improvement
Application: it is widely applied in the production of high speed wire, bar and deformed steel bar.
The cemerted carbtide composite roll i mainly used on the finishing rnill for bar, deformed steel bar and common wire. In this way, wecan greatly reduce the frequency of changing grove and rol, thus to reduce the labor intensity and improve the woik efficiency. Thesurface quality and yield shall be improved to a maximum degree, which leads to a remarkable economic benefit.
Our cemerted carbide compcsite roll adopts a special grade of cemented carbide.By means of hydraulic lock nut,the cementedcarbide rollrings is fastened to the axle with the axial pressure of 2OOMpa from hydraulic oil. Under the protection of prestress, thecemented carbide composite roll shall work more effectively.
Grade | Chemical composition | Physical mechanical properties | |||
Wc | Co/Ni/Cr | Density g/cm3 | Hardess HRA | Bending strength ≥N/mm2 | |
LMM-PL20F | 80 | 20 | 13.5 | 82.5 | 2650 |
LMM-PL22F | 78 | 22 | 13.3 | 82.0 | 2600 |
LMM-PL25F | 75 | 25 | 13.1 | 80.5 | 2550 |
LMM-PL30F | 70 | 30 | 12.6 | 79.5 | 2450 |
LMM-PL32F | 68 | 32 | 12.5 | 79.0 | 2400 |
Company introduction
LMM GROUP is cemented carbide steel industry, focus on the efficient solution, thus become the specialization of carbide roller ring.
Production equipment
The company has an integrated office space including a R&D center and a testing center, and a large-scale modern carbide roller ring production line. It can independently complete the entire process from product design, research and development, production of tungsten carbide powder to cemented carbide roll ring forming, processing, slotting, and rib milling of finished products. It has reached a production scale of 1,000 tons (50,000 pieces of cemented carbide roller rings) per year. The output ranks among the top in the world.
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The production of tungsten carbide powder is first calcined into blue tungsten by APT (ammonium paratungstate) through electric heating rotary furnace.
The blue tungsten is then reduced in an automatic propelled reduction furnace to produce tungsten powder.
Sieve the tungsten powder through a vibrating sieve.
The sieved tungsten powder is separated by an airflow classifier to separate tungsten powder with different particle sizes.
The tungsten powder is added with carbon black and other additives according to a certain ratio, and then it is ball milled and mixed well for use.
Put the tungsten powder prepared with carbon black into the intermediate frequency carbonization furnace for carbonization.
Finally, the carbonized tungsten carbide powder is milled and screened by a ball mill mixer to produce high-quality tungsten carbide powder.
A photograph of tungsten carbide grains under a high-magnification scanning electron microscope.
Ingredients: Prepare tungsten carbide powder, cobalt powder and other rare elements in proportion
Add the prepared raw materials into the ball mill for 24 hours of wet grinding, and add a molding agent to fully mix the powder.
Put the wet-ground mixture into the spray drying tower and spray dry it for use.
Pressure molding: put the prepared powder into the mold, and press it with a hydraulic press;
The compacted billet is sintered in a low-pressure dewaxing and sintering integrated furnace to form a roller ring blank.
Finishing: Roll ring blanks are processed into finished roll rings through flat grinding, inner hole grinding, and outer cylindrical grinding; it can also be processed into high-line grooved roll rings, high-line threaded roll rings, and combined rolls for bars according to different rolling mills , rebar roll
Detection: Our company has a complete set of detection methods, starting from tungsten carbide powder as the raw material of the product, detecting the distribution of tungsten carbide tissue, carbon composition analysis, oxygen content and other chemical composition analysis, and tracking to each process of the product, and finally Roll ring blanks are tested for physical properties. Including the analysis report of the metallographic photo, the hardness and bending strength of the roll ring, etc., and finally the inspection of the appearance of the product, that is, the accuracy of the processing size.
Certification
LMM Service
What do I need for offering a quote ?
Please offer us 2D or 3D drawings (with material, dimension, tolerance, surface treatment and other technical requirement etc.) ,quantity, application or samples. Then we will quote the best price within 24h.
One of the largest enterprises in China specializing in the production of high-performance high-speed steel roll series products
86(411) 84174804
lmme-business@lmmrolls.com
We can provide special services and differentiated products according to the different working conditions of the rolling mill.
Service Include
Classification by roll material：
Cast iron mill rolls
Cast steel mill rolls
Forging mill rolls
Sort by position on the rolling mill：
Work rolls
backup rolls
Intermediate roll
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.
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.
* 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.
* 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.
Are You Looking for rolling mill rolls? – contact us to get best plan.