|
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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