Material elements of hss roller
September 28, 2023
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The world No. 1 in crude steel production steel plant, over 80% of the backup rolls for plate mill are from us.
Backup rolls manufacturer
The world No. 1 in crude steel production steel plant, over 80% of the backup rolls for plate mill are from us.
LMM back-up roller material application range
Number | Material Number | Corresponding steel number | Adaptation |
1 | LMM-EBR52 | 5%CrMoVNb | Cold and hot continuous rolling forged steel backup rollers |
2 | LMM-EBR51 | 5%CrMoV | |
3 | LMM-EBR42 | 4%CrMoV | |
4 | LMM-EBR41 | 45Cr4NiMoV | |
5 | LMM-EBR32 | 3%CrMoV | 1. Medium and heavy plate ferrous metal rolling mill forged steel backup rollers 2. Various specifications of non-ferrous metal rolling mill support rollers |
6 | LMM-EBR31 | APEX | |
7 | LMM-EBR21 |
| Forged Steel Back-up Rolls for Wide and Heavy Plate Mills |
LMM backup roller manufacturer has successively developed Cr2, Cr3, Cr4, and Cr5 series backup roller materials with independent intellectual property rights, which meet the requirements of rolling technology for backup rollers and are still in use today;
About LMM GROUP
In the field of backup rollers, LMM’s goal is not only to become an important manufacturer of backup rollers, but also to lead the development of backup roller technology. As early as the 1980s, LMM Support Roller Manufacturing Factory successfully developed and produced support rollers weighing more than 100 tons; at the beginning of the 21st century, LMM Support Roller Manufacturing Factory successively developed Cr2, Cr3, Cr4, and Cr5 series backup roll materials meet the requirements of rolling technology for backup rolls and are still used today; in recent years, LMM backup roll manufacturing plant has developed Cr8 backup rolls with better wear resistance and stronger fatigue spalling resistance. In terms of research and development work, we have now mastered the material properties of Cr8 backup rollers and are in the stage of looking for manufacturers to conduct product trial production.
Visit LMM Production workshop - Manufacturing strength
Smelting:
Main equipment: 60t electric arc furnace, 80t electric arc furnace, 40t, 150t ladle refining furnace.
Pouring:
Main equipment: 600t, 400t, 200t, 100t vacuum ingot casting chamber.
Forging:
Main equipment: 160MN free forging hydraulic press, 125MN free forging hydraulic press, 80MN fast forging hydraulic press.
High-precision machining equipment
Ⅰ. Smelting and pouring process
Smelting:
Main equipment: 60t electric arc furnace, 80t electric arc furnace, 40t, 150t ladle refining furnace.
Pouring:
Main equipment: 600t, 400t, 200t, 100t vacuum ingot casting chamber.
Ⅱ. Forging process
Main equipment: 160MN free forging hydraulic press, 125MN free forging hydraulic press, 80MN fast forging hydraulic press.
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Ⅲ. Heat treatment process
After the continuous rolling backup rolls are heated, they are discharged and quenched.
Back-up rollers of wide and heavy plate rolling mill are released and quenched
Ⅳ. Heat treatment process
Ⅴ. Package
Manufacturing quality system
LMM Back-up Roller Manufacturing Factory is one of the earliest enterprises in China to implement total quality management, GB/T10300, and ISO9000 standards. It has now formed a complete and effective quality management system.
The company has successively obtained GB/T19001-ISO9001 and GB/T19002-ISO9002 quality management system certifications.
Use and management of backup rolls for hot-rolled strips
Shape is an important quality index of strip steel, and roll wear is one of the key factors affecting the final shape of strip steel. The roll wear includes back-up roll wear and work roll wear. Since the roll changing cycle of the backup roll is much longer than that of the working roll, its serious wear will affect the bending deformation of the working roll, which will also affect the strip shape quality. Roll wear is one of the factors that are difficult to quantitatively control in current production.
Improvement of Hss rolls technology
September 27, 2023
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Hss rolls materials and characteristics
September 26, 2023
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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.
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.
LMM GROUP have been supplied to world’s top steel manufacturer :
United Arab Emirates：Emirates 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
Are You Looking for rolling mill rolls? – contact us to get best plan.
