Alloy Ductile Iron Roll
The alloy ductile cast iron roll is made of acicular nodular cast iron mixing with nickel, chromium, molybdenum. It can be used in various blanking rolling mills for section steel, bar, wire rod and narrow strip, roughing mills, work roll for seamless steel tube, intermediate stand and finishing stand for section steel, bar, wire rod and narrow strip and rolling mills before finishing rolling for various sections and plate steels. The finished roll can also be used in the case of a low load. When the finished roll is subjected to a heavy load, it is preferable to use as a nodular cast iron chill roll with high strength and wear resistance. The TINVO mill rolls conform to the standards of ISO, GB, ASTM, DIN, JIS, high quality with the best price guaranteed
Application
Alloy spheroidal graphite iron roll has a lot of usage following as:
Blooming roll rack of rolling mills for section steel, bar, wire rod and narrow strip,
Rolling mill work roll for seamless steel tube
Intermediate and finishing roll rack of rolling mill for section steel, bar, wire rod and narrow strip
Chemical Composition
| Roll name | C | Si | Mn | P | S | Ni | Cr | Mo | Mg |
| Cr-Mo semi chilled nodular cast iron roll | 3.20~3.70 | 1.00~2.50 | 0.50~1.00 | ≤0.20 | ≤0.03 |
| 0.20~0.60 | 0.20~0.60 | ＞0.04 |
| Cr-Mo infinite chilled nodular cast iron roll | 3.20~3.70 | 1.00~2.50 | 0.50~1.00 | ≤0.20 | ≤0.03 |
| 0.20~0.60 | 0.20~0.60 | ＞0.04 |
| Ni-Cr-Mo infinite chilled nodular cast iron roll(I) | 3.20~3.70 | 1.00~2.50 | 0.50~1.00 | ≤0.20 | ≤0.03 | 0.50~1.00 | 0.20~0.60 | 0.20~0.60 | ＞0.04 |
| Ni-Cr-Mo infinite chilled nodular cast iron roll(II) | 3.20~3.70 | 1.00~2.50 | 0.50~1.00 | ≤0.20 | ≤0.03 | 1.01~3.00 | 0.30~1.20 | 0.20~0.60 | ＞0.04 |
| Ni-Mo nodular cast iron roll(I) | 3.20~3.70 | 1.50~2.40 | 0.40~0.80 | ≤0.20 | ≤0.03 | 1.00~2.50 | 0.10~0.50 | 0.40~0.80 | ＞0.04 |
| Ni-Mo nodular cast iron roll(II) | 3.20~3.70 | 1.20~2.40 | 0.40~0.80 | ≤0.20 | ≤0.03 | 2.51~3.50 | 0.10~0.50 | 0.40~1.00 | ＞0.04 |
Physical Properties
| Roll name | Roll-body hardness HSD | Roll-neck hardness HSD | Tensile strength Mpa |
| Cr-Mo semi chilled nodular cast iron roll | 40~55 | 32~50 | ＞300 |
| Cr-Mo infinite chilled nodular cast iron roll | 55~70 | 35~55 | ＞300 |
| Ni-Cr-Mo infinite chilled nodular cast iron roll(I) | 48~70 | 35~55 | ＞320 |
| Ni-Cr-Mo infinite chilled nodular cast iron roll(II) | 48~70 | 35~55 | ＞320 |
| Ni-Mo nodular cast iron roll(I) | 42~52 | 32~43 | ＞400 |
| Ni-Mo nodular cast iron roll(II) | 55~75 | 35~55 | ＞400 |
Metallographic Structure
| Roll name | Metallurgical structure |
| Cr-Mo semi chilled nodular cast iron roll | Pearlite + cementite + nodular graphite + a little ferrite |
| Cr-Mo infinite chilled nodular cast iron roll | Pearlite + cementite + nodular graphite |
| Ni-Cr-Mo infinite chilled nodular cast iron roll(I) | Pearlite + cementite + nodular graphite |
| Ni-Cr-Mo infinite chilled nodular cast iron roll(II) | Fine pearlite + cementite + nodular graphite |
| Ni-Mo nodular cast iron roll(I) | Sorbite + cementite + nodular graphite |
| Ni-Mo nodular cast iron roll(II) | Bainite+ cementite + nodular graphite |
