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Mill Rolls

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Mill Roll is the main working component and tool of the rolling mill, and the use is to make the metal continuously plastic deformation. The mill roll is mainly composed of a roll body, a roll neck, and a shaft head, three parts. The mill roll can be arranged in two rolls, three rolls, four rolls, or multi-rolls in the housing.

  • The roll body is actually involved in the intermediate working portion of the rolling metal. It has a smooth cylindrical or rolled groove.
  • The roll neck is mounted in the bearing and the rolling force is transmitted to the housing through the Pillow Block and the Screwdown Device.
  • The transmission end shaft head is connected to the Pinion Stand by the connecting shaft, and the rotational torque of the motor is transferred to the roll.
Mill rolls description

Product Category

Applications of Mill Rolls:

MaterialHardness(HRA) RangeHot Rolled StripBack-up Rolls(BUR)Temper RollsBlooming/slabbing Mill RollBillet RollsRail-beam / Heavy SectionShape / Section SteelRod / WireSeamless Steel Tube
Vertical RollsRRWF1-3F4-7Rough RollingFinish RollingBloomingEdge RollingRoll RingRough RollingIntermediate RollingPre-finish RollingFinish RollingContinuousSizing
Cast Alloy Steel Rolls35-45
Semi-steel(Adamite) Rolls35-65
Graphitic Steel Rolls40-65
Composite Cast Steel Rolls55-75
Tool Steel Rolls65-75
High-speed Steel (HSS) Rolls80-85
High carbon High-speed Steel Rolls80-92
High Chrome Steel Rolls72-82
High Chrome Iron Rolls70-90
High Nickel-chrome Steel Rolls70-88
Ductile Iron Rolls40-75
Forged Steel Rolls40-70
New High Roughness Retentivity Cold Work RollsNew High Roughness Retentivity Cold Work RollsSemi-HSS Cold Intermediate RollSSemi-HSS Cold Intermediate Rolls
New Plate rolling Back-up RollNew Plate rolling Back-up RollsNew High-speed Steel Roughing Work RollsNew High-speed Steel Roughing Work Rolls
High Wear Resistance High Finishing Retentivity Rear Work RollSHigh Wear Resistance High Finishing Retentivity Rear Work RollsHigh-Grade Automobile Sheet Cold Work RollsHigh-Grade Automobile Sheet Cold Work Rolls
Anti-roll Mark Roll Cold Work RollsAnti-roll Mark Roll Cold Work RollsHigh Wear Resistance and Chromium Free Plating Work RollsHigh Wear Resistance and Chromium-Free Plating Work Rolls
High carbon High-speed Steel RollsHigh carbon High-speed Steel RollsHeight Class High Strength Heavy and Medium Plate Mill RollsHeight Class High Strength Heavy and Medium Plate Mill Rolls
Long Term Strip Edger RollsLong Term Strip Edger RollsAnti-fatigue Impact Resistance 2 Roughing Mill RollsAnti-fatigue Impact Resistance 2 Roughing Mill Rolls

Tungsten carbide rolls in typesTungsten carbide cold rolls, also in name wire mesh rolls, tungsten carbide rolls, which is used in cold rolling steel wire into reinforcing wire for the construction industry. TC cold roll includes PR, CA, RT, RO, FO type.
Tungsten carbide rolls in types:

  • Profiling rolls
  • Oval reducing rolls
  • Round reducing rolls
  • Forming rolls
  • Sizing rolls

Roller Holder matching Tungsten Carbide Cold Rolls assembling in a rolling cassette. Compatible with Eurolls, GSG, and Atomat, almost any brand wire rolling Cassettes. Roller Holder OR roller bearing is a key part of the Wire Rolling cassette for producing reinforcing steel wires and bars.
Roller holder supplied by UKO with following merits:Tungsten carbide rolls holder

  • Most parts of the holder processed with Japanese steel by precision CNC machine.
  • Detachable and reusable housing and parts.
  • Holder housing heat treated.
  • Replaceable SKF bearing, just replace the bearing if worn.
  • Accurate design ensuring the steady installation of TC Roller.
  • Smoothly running lessening wear of TC Rollings.
  • High productivity.

Products Overview

Grade g30 Tungsten Carbide Roller Used for Cold Rolling Steel Wire

Grade g30 Tungsten Carbide Roller Used for Cold Rolling Steel Wire

Tungsten Carbide Cold Forming Rolls for Drawing Metal Sheets

Tungsten Carbide Cold Forming Rolls for Drawing Metal Sheets

Three Dimension RO Rt FO PR Type Tungsten Carbide Wire Roller

Three Dimension RO Rt FO PR Type Tungsten Carbide Wire Roller

Logo Lasering Service Tungsten Carbide Three dimensional Rolls

Logo Lasering Service Tungsten Carbide Three dimensional Rolls

Roller Holder With Detachable and Reusable Housing and Parts

Roller Holder With Detachable and Reusable Housing and Parts

No Standard Roller Holder Processed With Japanese Steel by Precision CNC Machine

No Standard Roller Holder Processed With Japanese Steel by Precision CNC Machine

Popular HSS hot mill rolls for wire and bar mills

New HSS Hot Mill Rolls

High Speed Steel Wire Mill Roll

High-speed Steel Wire Mill Roll

Tip: Click above to view larger image

Resource

Tungsten carbide rolls youtube video
UKO's PDF Download

Related product: Carbide descaling rollerAnchor icon

UKO's Carbide Descaling Rolls
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How to choose mill rolls?2021-04-20T08:27:33+00:00

The performance and quality of the rolls generally depend on their chemical composition and manufacturing and can be assessed by their metallographic tissue, physical and mechanical properties, and residual stress type present in the mill roll.

The use effect of mill rolls in the mill is not only dependent on the material of the roll and its metallurgical quality, and it is also related to the conditions, roll design, and operation maintenance.
There is a big difference in the use conditions of rolls of different types of mills, resulting in differences:

  • Rolling mill conditions. Such as rolling mills, rolling mills, and mill rolls design, hole design, water-cooled conditions, etc.
  • Rolling conditions such as rolling products, specifications, and deformation resistance, depression systems, and temperature systems, yield requirements, and operations.
  • Requirements for product quality and surface quality.

Common mill rolls material and use table

Mill rolls categoryMill rolls body hardness(HS)Mill rolls neck Strength (MPA)Applications
Cast steel mill rollsCast steel
Semi-steel
Graphite steel
High-chromium steel
Tool steel (high carbon
High-speed steel)
30~70
35~70
35~60
70~80
80~90
500~1000
300~700
500~900
Large, medium-sized steel, roughing mill housing, slate rolling mill Roughing Mill Housing, BUR.
Big, medium, small steel middle, and finishing mill housing, slate steel WR.
Big, medium, and small steel roughing mill housing.
With steel coarse rolled horn, finished rolling front, cold-rolled strip work roller (WR).
Hot rolled steel finishing mill housing, small or wire Finishing mill housing.
Cast iron mill rollsCold cast iron
Unbounded (limited) cold and hard cast iron
Ductile iron
High chromium cast iron
Special cast iron
55~85
55~85
35~80
60~95
75~95
150~220
150~220
300~700
Plate, wire, profile, pipe Finishing mill housing.
Plate, wire, profile, tube, rolled, finishing mill housing, slate steel finishing mill housing.
Profile, wire, pipe, medium rolling housing.
Small steel, wire rolling mill finishing mill housing, steel pre-finishing mill housing.
Small, wire, pipe pre-finishing mill, finishing mill.
Powder metallurgy mill rollsTungsten carbide
Tool steel
80~90
80~90
Small, wire finishing mill housing, cold-rolled small steel.
Small, wire finishing mill housing, strip steel finishing mill housing.
Forged steel mill rollsHot roll
Cold roll
BUR
Forging semi-steel and white mouth iron
35~60
75~105
40~70
35~70
500~1100
700~1400
700~1400
500~1000
Blooming mill, large thick rolling rack, steel Roughing mill housing
Cold rolled steel work roller, profile, welded pipe forming roller
Cold, hot plate strip rolling mill
Big, medium, small, medium, finishing mill housing

Note: The composite roller neck material is selected according to the strength requirements.

Therefore, different types of rolling mills and rolling mills are used in the same type, which requires no thunder, such as bullet and slab initial rolling rolls to have good twists and bend strength, toughness, bitterness, Anti-thermal cracking and thermal impact and wear resistance; and the tropical finishing rack requires high hardness, resistance, wear-resistant, anti-flakes and heat-resistant cracks such as roll surface.

To clarify the use conditions of the roll and the failure of the rolls used in the same type of rolling mill to understand the performance and manufacturing process of the current various rolls, in order to correctly formulate the technical conditions of the rolling mill and the selected suitable and economical roll material.
The most common method of evaluating the performance of the roll in the mill is:

  • Rolling the rolling weight (kg) (referred to as the roll consumption) consumed by the 1t rolling material, expressed by kg/t;
  • Reduce the weight of the rolled material per unit roll, expressed with t/mm.

With the modernization of the rolling mill, the in-depth study of the fading of the rolls and the improvement of roll materials and manufacturing processes, the average roll consumption of industrially developed countries has decreased below 1kg/t.

What are the performance requirements of the mill rolls?

  • Anti-thermal crack: Typically, the coarse roll is mainly required, and the thermal crack is mainly required; the working roll of the small 20 rolling mills is only 100 grams, while the weight of the support roller of the wide plate roller has exceeded 200 tons. When the roll is used, the safety-loaded body material (various levels of cast iron, cast steel or forged steel, or the like) is selected according to the basic strength of the roll.
  • Hardness: The finishing roller speed is high, and the final product of rolling should have a certain surface quality, which is mainly required to hardness, wear resistance, etc. The wear resistance should then be considered when the roll is used. Since the wear mechanism of the roll is complicated, including mechanical stress, the thermal action, cooling effect, the chemical effect of cooling effect, lubrication medium, and other effects, no comprehensive evaluation of the anti-wear resistance of the roll resistance. Since the hardness is easy to measure, and the wear resistance can be reflected under certain conditions, the wear-resistant indicator of the roll is generally expressed in the radial hardness curve.
  • Impact Resistance: In addition, there are some special requirements for the roll, such as the amount of pressure, which requires a strong bit bite ability, more impact.
  • Degree of finish: When the thin size product is rolled, the rigidity, tissue performance uniformity, processing accuracy, and surface finish of the roll are strictly required.
  • Cutting performance: When rolling the complex section, the cutting performance of the roller working layer is considered.
    When the roll is selected, some of the performance requirements of the roll often are opposite each other. The roll purchase fees and maintenance costs are very expensive, so we should fully weigh the techniques and economical pros and cons decided to cast or forged, alloys or non-alloys, Single material or composite.
How to classify mill rolls?2021-04-20T09:10:08+00:00

There are a variety of classification methods of mill rolls, mainly:
(1) According to the product type, there is a steel roller, type steel roll, wire roll, etc.

(2) Press the roll in the roll series in the mill series, there is a blank roll, a thick roll, and a finishing roll or the like;

(3) Press the rolling function to divide the roller, perforated roll, flat roller, etc.

(4) According to the roll material, steel rolls(High-Speed Steel Rolls), cast iron rolls, Tungsten Carbide Rolls, ceramic rolls, etc.

(5) According to the manufacturing method, there is a cast roll, forged rolling roller, a stainless rolling roll, a set roll, etc.

(6) Press the rolled steel state with a Hot Mill Roll and Cold Mill Roll.

Various classifications can be combined to make the rolls more clear, such as hot-rolled steel for centrifugal steel working rolls.

How is the manufacturing technology of the mill rolls development?2021-04-20T06:25:36+00:00

Variety and manufacturing process of mill rolls with the progress of metallurgical technology and the evolution of rolling equipment.

  1. Medieval rolling soft non-ferrous metallic rolls.
  2. In the middle of the 18th century, Yeying, Master the production technology of cold cast iron rolls for rolled steel sheets.
  3. The advancement of European steelmaking technology in the next half of the 19th century requires rolling a larger tonnage of steel ingots, whether it is the strength of the gray cast iron or the cold cast iron rolls, with no requirements. The carbon content is 0.4% to 0.6%, the ordinary cast steel roller is born. The emergence of heavy-duty-duple forging equipment is further improved by the strong toughness of the forging rolls of this component.
  4. The introduction of alloying elements of alloy elements in the early 20th century significantly improves the wear resistance and toughness of cast steel and forged steel hot rolls and cold rolls. The surface quality of the rolled material is improved in the cast iron roll of the hot-rolled sheet. The composite casting of the rinsing method significantly increases the core strength of the cast roll.
  5. A large number of alloy elements in the roll is after the Second World War, this is the rolling equipment towards large, continuous, high speed, automation, and improved the strength of the rolling, and the deformation resistance increases higher requirements. the result of. A semi-steel roll and a ductile iron roll occurred in this period.
  6. After the 1960s, it was also developed successfully the powder tungsten carbide roll.
  7. In the early 1970s, the comprehensive performance of the roll rolls in Japan and Europe in the early 1970s, the overall performance of different temperature heat treatment technology, etc. Composite high chromium cast iron rolls are also successfully used in a tropical rolling mill. In the same period, forging white mouth iron and semi-steel rolls were applied in Japan.
  8. In the 1980s, Europe also introduced high-chromium rolls and ultra-deep hardening cold rolls, and special alloy cast iron rolls for small steel and wire finishing rolling. The development of contemporary rolled steel technology has prompted the development of higher performance rolls.
  9. Using centrifugal casting method and new composite method such as continuous casting compound (CPC), injection deposition method (Osprey method), electroflag welding method, and heat-like, a forged steel or pneumo Cast iron, the outer layer of high-speed steel series composite rolls and metal-ceramic rolls have been applied to Europe, Japan new generation profiles, wire, steel mills.
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