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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Development of foreign casting high speed steel rolls

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Casting high-speed steel rolls were first successfully developed by the Japanese in 1988 and used in hot strip rolling mills. The United States began to introduce high-speed steel rolls in the early 1990s, and Europe started relatively late. High-speed steel rolls are generally defined as tool steels that have the ability to maintain hardness during high-speed cutting. As the material of the working layer of the roll, it has high red hardness and high wear resistance during hot rolling. The content of carbon and other forms of carbide alloy elements in high-speed steel rolls is generally greater than 15%, while in tool steel rolls less than 15%. The difference between high-speed steel rolls and semi-high-speed steel rolls is mainly reflected in the difference in alloy content. The content of carbon elements and other carbide-forming alloying elements between the two is nearly doubled.

rolling-mill-rolls

The widely used cast high-speed steel rolls are mainly produced by three methods: one is the vertical centrifugal casting method, which is used in Europe and North America to produce HSS rolls. The second is the CPC continuous casting method. In Japan, 60%~70% H SS rolls are produced by CPC method, and 30%~40% H SS rolls are produced by centrifugal casting method. The third is the ESR electroslag casting method, which is a method of producing H SS rolls based on the CPC method and adding electroslag purification. Ukraine and Belgium have produced a small amount of rolls by this method.

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

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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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