1) forged work roll and intermediate rolls for cold rolling mill
|
material |
c |
mn |
cr |
mo |
v |
ni |
|
86crmov7 |
0.82-0.88 |
0.32-0.50 |
1.50-2.20 |
0.20-1.0 |
0.10-0.40 |
≤0.60 |
|
9cr2mo |
0.85-0.95 |
0.20-0.60 |
1.50-2.50 |
0.20-1.0 |
- |
≤0.60 |
|
3%cr |
0.75-0.95 |
0.20-0.60 |
2.50-3.50 |
0.20-1.0 |
- |
≤0.60 |
|
3%cra |
0.70-0.90 |
0.30-0.80 |
2.50-3.50 |
0.40-1.0 |
0.10-0.40 |
0.60-1.0 |
|
5%cr |
0.70-0.90 |
0.20-0.50 |
4.50-5.50 |
0.20-1.0 |
0.10-0.40 |
0.60-1.0 |
2) forged back-up roll of cold and hot strip mills
|
material |
c |
mn |
cr |
mo |
v |
ni |
|
3%cr |
0.40-0.70 |
0.40-0.80 |
2.80-3.20 |
0.20-0.40 |
0.10-0.20 |
0.25-0.60 |
|
5%cr |
0.40-0.70 |
0.40-0.80 |
5.00-5.40 |
0.30-0.50 |
0.10-0.20 |
0.25-0.60 |
typical mechanical properties
|
type of cold rolls |
tensile strength |
depth of hardness |
hardness of neck |
hardness of barrel |
|
cr2 series |
≥800 |
12-18 |
40-55 |
work roll:90-98 intermediate roll:80-90 back-up roll:55-75 temper roll:95-100 |
|
cr3 series |
≥900 |
20-28 |
40-55 |
|
|
cr5 series |
≥1000 |
25-40 |
40-55 |
the scope of supply
|
type of cold rolls |
material |
body length |
body diameter |
overall length |
|
cold-rolling work rolls |
cr2, cr3, cr5 |
≤2500 |
≤800 |
5000 |
|
cold-rolling intermediate rolls |
cr2, cr3, cr5 |
≤2500 |
≤1000 |
≤5000 |
|
cold-rolling back-up rolls |
cr3, cr5 |
≤2800 |
≤1800 |
≤8000 |
|
cold-rolling temper rolls |
cr2, cr3, cr5 |
≤2500 |
≤800 |
≤8000 |