//Hot Strip Continuous Mill and Plate Mill Work Roll (HiCr cast steel roll, ICDP cast iron roll, HSS roll)

Hot Strip Continuous Mill and Plate Mill Work Roll (HiCr cast steel roll, ICDP cast iron roll, HSS roll)

Hot Strip Continuous Mill and Plate Mill Work Roll

HiCr Steel, HSS and Enhanced ICDP are popular materials used for Hot Strip Rolling Mill work rolls.

HiCr Steel Rolls

HiCr Steel is characterized by excellent fire crack resistance and very good oxidation behaviour at rolling temperature. Very good wear resistance and constant material properties throughout the shell layer.

HiCr Steel is manufactured by horizontal spin casting. No retained Austenite and the right structure and properties are obtained through the chemical composition, high temperature quenching and tempering cycles.

Core material:

  • Nodular Iron

Application: 

  • Work Rolls for Roughing Stands of conventional HSM
  • Early Stands of CSP Mill
MATERIAL CHEMISTRY BARREL HARDNESS

(HSC)

C Si Mn Cr Ni Mo V
HiCr Steel 0.90-2.00 0.40-1.40 0.40-1.40 9.0-15.0 0.60-1.60 1.00-2.00 ≤1.00 65-80

 

TYPICAL PHYSICAL PROPERTIES
Neck Hardness (HSC) Tensile Strength (N/mm2) Unevenness of Barrel Surface Hardness (HSC) Difference of Shell Thickness
35-45
shell ≥750

core & necks ≥400

<3 <10

                         HARDNESS CURVE                                                                   MICROSTRUCTURE(500X)
Hot Strip Continuous Mill and Plate Mill Work Roll (HiCr cast steel roll, ICDP cast iron roll, HSS roll)    Hot Strip Continuous Mill and Plate Mill Work Roll (HiCr cast steel roll, ICDP cast iron roll, HSS roll)

Enhanced ICDP Rolls

The enhanced ICDP is developed based on the classic Indefinite Chill Double Poured Cast Iron.The microstructure consists of a bainitic / martensistic matrix with Fe3C and MC carbides homogeneously distributed and a certain amount of free graphite fine and also well distributed in the matrix.The rolls are double tempered to avoid retained Austenite and to obtain the right hardness level and the optimum residual stress level.

Core material:

  • Nodular Iron or Grey Iron depending on the mill or customer’s requirements

Application:

  • Late finishing stands (F4 – F7) of hot strip mills
  • Steckel mills, Heavy Plate mills and finishing stand of section mills
MATERIAL CHEMISTRY BARREL HARDNESS
(HSC)
C Si Mn Cr Ni Mo V+W+Ti+Nb
EN-ICDP 2.90-3.40 0.60-1.60 0.50-1.50 1.20-2.0 3.50-5.00 0.20-1.00 ≤2.5 70 – 82

 

TYPICAL PHYSICAL PROPERTIES
Neck Hardness (HSC) Tensile Strength (N/mm2) Unevenness of Barrel Surface Hardness (HSC) Difference of Shell Thickness
35-45 ≥400 <3 <10

HSS Rolls

The microstructure consists of tempered bainitic / martensitic matrix with primary and secondary carbides.Primary carbides MC, M7C3, M6C and M2C are originated during the eutectic solidification. Secondary carbides are precipitated during the High Temperature quench and tempering. The rolls are cast with the right structure to undergo the High Temperature quenching to promote the right precipitation of secondary carbides and optimum material properties. Excellent wear resistance and fire crack resistance and very good oxidation behaviour at rolling temperatures under the adequate rolling conditions are the main features of this grade

Core material: Nodular Iron

Application:
Work Rolls for early finishing stands (F1-F4) of HSM and early stands of CSP Mill.
Work Rolls for finishing stands of bar mills.

MATERIAL CHEMISTRY BARREL HARDNESS
(HSC)
C Si Mn Cr Ni Mo V W
HSS 1.50-2.20 0.30-1.00 0.40-1.20 3.00-
8.00
0.50-1.50 2.00-8.00 2.00-9.00 0.00-8.00
75-85

 

TYPICAL PHYSICAL PROPERTIES
Neck Hardness (HSC) Tensile Strength (N/mm2) Unevenness of Barrel Surface Hardness (HSC) Difference of Shell Thickness
30-45 shell ≥800
core & neck ≥400
<3 <10

TECHNOLOGY

–MELTING

TSR Rolls factory is equipped with a variety of smelting equipments, such as EBT electric arc furnace, LF double-bit refining furnace, VD-VOD vacuum furnaces and etc. Advanced smelting equipment supplemented by temperature control, component analysis and other testing equipment ensure that each furnace is in line with the requirements of molten steel.

Steel Foundry

  • EBT Arc Furnace; Capacity 55T
  • Ladle Furnace, Double position; Capacity 55 T Each
  • Vacuum Degassing VD + VOD, 9 units; Capacity 90 T Each
  • Medium Frequency Induction Furnaces, 2 sets; Capacity 20 T Each

Large Rolls Foundry

  • 2 x 20 T Medium Frequency Induction Furnaces
  • 2 x 10 T Medium Frequency Induction Furnaces
  • 2 x 7 T Medium Frequency Induction Furnaces
  • 2 x 3 T Medium Frequency Induction Furnaces

Small Rolls Foundry

  • 2 x 3 T Medium Frequency Induction Furnaces
  • 2 x 1.5 T Medium Frequency Induction Furnaces
  • 2 x 1 T Medium Frequency Induction Furnaces

Hot Strip Continuous Mill and Plate Mill Work Roll (HiCr cast steel roll, ICDP cast iron roll, HSS roll)    Hot Strip Continuous Mill and Plate Mill Work Roll (HiCr cast steel roll, ICDP cast iron roll, HSS roll)

–CASTING

TSR Rolls applies advanced roll casting technology to first-class foundry equipment. Our main production processes use computers to control and select parameters automatically. So we can ensure that each batch of rolls has consistent production process control. Every step is traceable by our Electronic recording system. Whether it is static casting or centrifugal casting, our products have excellent performance.

7 Horizontal Spin Casters (Centrifugal Machines)

  • 1 Unit Ø 1.600 mm x 4.500 mm B.L.
  • 1 Unit Ø 1.400 mm x 3.000 mm B.L.
  • 2 Units Ø 800 mm x 2.600 mm B.L.
  • 1 Unit Ø 500 mm
  • 2 Units Ø 300 mm

Plus a complete set of chills, chillers and moulding tackle to cast all kind of rolls including big section rolls with the barrel shaped with grooves and collars in as-cast condition.

Hot Strip Continuous Mill and Plate Mill Work Roll (HiCr cast steel roll, ICDP cast iron roll, HSS roll)    Hot Strip Continuous Mill and Plate Mill Work Roll (HiCr cast steel roll, ICDP cast iron roll, HSS roll)

2020-09-02T15:51:16+08:00

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