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 PF 101

Alloy Chilled Cast Iron rolls (rings) is one kind of cast iron roll making use of super-cooling of model surface and adding Ni, Cr, Mo alloy elements. There is no free graphite in the microstructure of the working layer, so it results in high hardness and excellent wear resistance.

These type of material may be used to produce large scale rolls in double pouring process. The barrel of rolls has high hardness while the neck has high toughness, so these type of rolls exhibit the proper tie of high thermal stability and resistance to accident.

Microstructure:


Matrix 500X pearlite+ Carbide

Matrix 500X fine pearlite+ a little of bainite+carbide

Depth from surface (mm)
 
 Chemical Composition (%)
Symbol Material
C
Si
Mn
Cr
Ni
Mo
V
 
CC-1 Chilled
2.9-3.8
0.4-1.0
0.2-1.0
0.2-0.6
-
0.2-0.6
-
CC-2 Chilled
2.9-3.8
0.4-1.0
0.2-1.0
0.2-0.6
0.5-1.0
0.2-0.6
-
CC-3 Chilled
2.9-3.8
0.4-1.0
0.2-1.0
0.2-0.6
1.0-0.3
0.2-0.6
-
CC-4 Chilled/nodular
duplex
2.9-3.8
0.4-1.0
0.2-1.0
0.1-0.6
-
0.2-0.8
(0.1-0.3)
 
 Physical Properties:
Symbol
Shell
HS
Shell
HS
Tensile strength
MPa
Clear chilled depth (mm)
Section steel
Plate steel
< X 200
X201-250
X251-300
>X300
Sheet
Plate
CC-1
58-70
32-48
>150
12-25
15-30
17-35
20-45
CC-2
62-75
35-52
>150
12-25
15-30
17-35
20-45
CC-3
65-80
35-52
>150(300)
12-25
15-30
17-35
20-45
CC-4
60-70
35-48
>300
8-35
8-45
 
 Application:
CC-1 The finishing stands of small bar, rod mills and narrow strip mills.
CC-2 The finishing stands of small bar, rod mills and narrow strip mills, stretch reducing rings for seamless tube mills
CC-3
CC-4 3-Hi plate mills, hot pack mills.
 
 The capacity of making:
Type
Diameter of barrel (mm)
Length of barrel (mm)
 
small
< X 500
large
< X 900
3000

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