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

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YUAN HUI
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Several key technical issues in the use of high-speed steel hot rolling rolls

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High-speed steel hot rolling rollers have excellent wear resistance, roughness retention and crack resistance, and their service life is 1.5 to 3 times that of traditional hot rolling rollers. In recent years, high-speed steel rolls have begun to replace traditional hot rolls and are being rapidly promoted and applied.

keyword: high-speed steel rolls

Driven by market competition and advances in rolling technology, the cross-sectional shape and surface quality requirements of hot-rolled plates are getting higher and higher. At the same time, rolling varieties and specifications continue to increase, rolling conditions change greatly, and rolling abnormalities such as strip deviation, tail flick, and roll breakage increase. The performance requirements for hot rolling rolls are also getting higher and higher. High-speed steel hot rolling rollers have excellent wear resistance, roughness retention and crack resistance, and their service life is 1.5 to 3 times that of traditional hot rolling rollers. In recent years, high-speed steel hot rolls have begun to replace traditional hot rolls and are being rapidly promoted and applied. High-speed steel hot rolling rolls also have shortcomings such as large thermal expansion, high friction coefficient, and easy damage. The requirements for use conditions are relatively high. The shedding of the oxide film on the roll surface and the change of the roll shape affect the surface and cross-section quality of the strip. Therefore, it is necessary to carry out technical research on the use of high-speed steel hot rolling rolls.

rolling mill rolls

Hot rolling work roll material

Hot rolling rough rolling work roll material

Hot rolling finish rolling work roll material

High speed steel hot roll manufacturing process

High speed steel hot rolls material type

Performance comparison of high speed steel hot rolling rolls

Abnormal oxidation film of high-speed steel hot rolling roll

Roll cooling technology

High speed steel roll surface cracks

High speed steel roll surface cracks

Thermal expansion of high speed steel rolls

High-speed steel work roll oxide film control technology

The oxide film of high-speed steel work rolls can be divided into 6 levels, which can also be simplified to 3 levels.

levelsurface condition
AThe roller surface is smooth and shiny, the oxide film is fine and complete; the edges of the rolling surface are smooth.
A-The roll surface is smooth and even, the oxide film peels off slightly in the shape of orange peel; the edges of the rolling surface are smooth and clean.
BThe roll surface is smooth, and the oxide film has small meteor-shaped slight peeling; there are streak marks on the edges of the rolling surface, but it feels smooth.
B-The roll surface is smooth, and the oxide film is peeled off like a fishbone; there are stripes on the edges of the rolling surface, but there are no rough stripes to the touch.
CThe roll surface is rough, the oxide film is cracked, and there are even scratches on the roll body; there are rough stripes with obvious feel on the edge of the rolling surface.
C-The roll surface is rough, and large areas of the oxide film fall off (separation, spots); there are striped rough bands on the edges of the rolling surface.

Oxide film control technology

Roll cooling technology

Rolling lubrication technology

Rolling lubrication can reduce strip surface and plate shape defects, reduce rolling force, and increase roll service life, thereby achieving the purpose of reducing production costs and consumption.

The key elements of hot rolling free rolling technology include: high-speed steel roll technology, roll cooling technology, rolling lubrication technology, online roll grinding or CVC roll shifting technology.

Roller shape optimization technology

Detection Technology

Surface crack detection is an important means to avoid abnormal failure of high-speed steel work rolls. Surface cracks on high-speed steel work rolls are generally detected by surface wave method. Since the sound waves of different manufacturers, different materials, and different types of rolls have different degrees of attenuation, the roll surface needs to be divided into multiple areas for scanning based on the propagation distance of the sound waves. Perform axial and circumferential inspections simultaneously to confirm the distribution of cracks.

1. Detection and evaluation of surface cracks and internal defects of rolls

2. Detection and evaluation of roll oxide film

3. Roller temperature detection

4. Roll roughness measurement

5. Roller wear measurement

6. Roll structure inspection

7. Roll hardness measurement

8. Roll size detection

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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