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

Adamite roll manufacturer

As a provider of high-durability adamite roll, LMM GROUP ensure our products are built to last. Our rolls undergo rigorous testing to guarantee they can withstand the toughest operating conditions, providing reliability and longevity.

Adamite rolls, also known as semi-steel rolls, are a type of rolling mill roll made from a material that combines the characteristics of cast iron and steel. These rolls are used in various industrial applications, particularly in the metalworking industry, due to their unique properties. Here are some key features and uses of adamite rolls:

Features of Adamite Rolls:

Material Composition:

Adamite rolls are made from an alloy of iron with a small amount of alloying elements like chromium, nickel, and molybdenum.
This combination gives the rolls a structure that lies between cast iron and steel, providing a balance of hardness, toughness, and wear resistance.

Hardness:

The surface hardness of adamite rolls is relatively high, which makes them resistant to wear and deformation under heavy loads.
The hardness typically ranges from 35 to 55 HRC (Rockwell Hardness Scale).

Toughness:

Despite their hardness, adamite rolls maintain good toughness, which helps them withstand the mechanical stresses encountered during the rolling process.

Heat Resistance:

They exhibit good thermal conductivity and resistance to thermal cracking, making them suitable for high-temperature applications.

Applications of Adamite Rolls:

Metal Rolling Mills:

Used in hot and cold rolling mills for rolling various types of steel and other metals.
Commonly used in the intermediate and finishing stands of hot strip mills, section mills, and bar and wire rod mills.

Durability:

The combination of hardness and toughness ensures a longer service life compared to traditional cast iron rolls, reducing downtime and maintenance costs.

Surface Finish:

Adamite rolls provide a good surface finish on the rolled products, which is essential for producing high-quality metal sheets and bars.

Versatility:

Suitable for rolling a wide range of materials, including carbon steel, stainless steel, and non-ferrous metals.

backup rolls

The table of adamite rolls chemical composition as follows

Alloy MaterialsCSiMnPSNiCrMo
ZuB140CrNiMo1.30~1.500.30~0.600.70~1.10≤0.035≤0.0300.20~0.800.80~1.200.20~0.60
ZuB160CrNiMo1.50~1.700.30~0.600.70~1.10≤0.035≤0.0300.20~1.000.80~1.200.20~0.60
ZuB180CrNiMo1.70~1.900.30~1.000.70~1.20≤0.035≤0.0300.60~1.501.00~1.500.20~0.80
ZuB200CrNiMo1.90~2.100.30~1.000.70~1.20≤0.035≤0.0301.00~2.001.20~2.000.20~0.80

Physical Properties

Alloy MaterialsRoll-body hardness HSDTensile strength MpaDuctility %Impact toughness J/cm
ZuB140CrNiMo35~45≥590≥1.0≥4
ZuB160CrNiMo38~53≥540≥1.0≥4
ZuB180CrNiMo42~55≥500≥0.5≥4
ZuB200CrNiMo45~60≥450≥0.5≥4

 

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.

rolling mill rolls

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

backup rolls

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.

backup rolls

Ⅲ. Heat treatment process

After the continuous rolling backup rolls are heated, they are discharged and quenched.

backup rolls

Back-up rollers of wide and heavy plate rolling mill are released and quenched

Ⅳ. Heat treatment process

HSS ROLLS manufacturer

Ⅴ. Package

backup rolls

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.

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.

Rolling Mill Roll Manufacturer​

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 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

Contact US Now !

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

Contact US Now !

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