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

YUAN HUI

YUAN HUI

LMM GROUP main products focus on the cold and hot plate & wide strip mill rolls and heavy section mill rolls and big casting & forging pieces.

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Mill rolls classification

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There are many types of rolls. At present, the commonly used types of rolls are cast steel rolls, cast iron rolls and forging rolls. There are also a small amount of carbide rolls on the profile rolling mill.

According to the molding method: casting rolls and forging rolls; casting rolls refer to the types of rolls manufactured by the production method of direct casting of smelted molten steel or smelted molten iron. Casting rolls can be divided into two categories: cast steel rolls and cast iron rolls according to materials; according to manufacturing methods, they can be divided into two categories: integral casting rolls and composite casting rolls. Forging rolls are classified by material as follows:

(1) Forging alloy steel rolls;

(2) Forging semi-steel rolls;

(3) Forging semi-high-speed steel rolls;

(4) Forging white cast iron rolls.

By process method: integral roll, metallurgical composite roll and combined roll

1. Compared with the composite roll, the overall roll is cast or forged from a single material. The different structures and properties of the outer layer of the roll body and the roll neck are controlled and adjusted through the casting or forging process and the heat treatment process. Both forged rolls and static cast rolls are integral rolls. Integral rolls are divided into integral casting and integral forging rolls;

2. Metallurgical composite casting rolls mainly include semi-flushing composite casting, overflow (full flushing) composite casting, and centrifugal composite casting. In addition, there are types of composite rolls manufactured by special composite methods such as continuous casting and cladding (CPC-Continuous Pouring Process for Cladding), spray deposition, hot isostatic pressing (HIP-Hot Isostatically Pressed), and electroslag fusion welding. The combined roll is mainly a set of combined rolls.

By manufacturing material: cast steel series rolls, cast iron series rolls and forged series rolls

Commonly used types of heat treatment for rolls: stress relief annealing, isothermal spheroidizing annealing, diffusion annealing, normalizing, tempering, quenching, cryogenic treatment.

Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to quantity.

A: Payment<=1000USD, 100% in advance. Payment>=1000USD, 30% T/T in advance ,balance before shippment.

Always a pre-production sample before mass production;
Always final Inspection before shipment;
During the epidemic, provide remote detection technical support

Tell us a little about your application and we’ll get back to you to finalize a quotation to meet your needs as quickly as possible.

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.

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