Chemical Analysis
Designation of rolls | Material code | C | Si | Mn | Ni | Cr | Mo |
Centrifugal cast iron rolls (Ⅰ) | HCrⅠ | 3.00-3.30 | 0.30-1.00 | 0.50-1.20 | 0.70-1.70 | 12.00-15.00 | 0.70-1.50 |
Centrifugal cast iron rolls (Ⅱ) | HCrⅡ | 3.00-3.30 | 0.30-1.00 | 0.50-1.20 | 0.70-1.70 | 15.01-18.00 | 0.70-1.50 |
Centrifugal cast iron rolls (Ⅲ) | HCrⅢ | 3.00-3.30 | 0.30-1.00 | 0.50-1.20 | 0.70-1.70 | 18.01-22.00 | 1.51-3.00 |
Physical Properties
Designation of rolls | Material code | Barrel hardness（HSD） | Neck hardness (HSD) | Tensile strength (Mpa |
Centrifugal cast iron rolls (Ⅰ) | HCrⅠ | 60-75 | 32-45 | ＞350 |
Centrifugal cast iron rolls (Ⅱ) | HCrⅡ | 65-80 | 32-45 | ＞350 |
Centrifugal cast iron rolls (Ⅲ) | HCrⅢ | 75-90 | 32-45 | ＞350 |
Microstructure
Designation of rolls | Material code | Microstructure |
Centrifugal cast iron rolls (Ⅰ) | HCrⅠ | Bainite +carbide |
Centrifugal cast iron rolls (Ⅱ) | HCrⅡ | Bainite +carbide |
Centrifugal cast iron rolls (Ⅲ) | HCrⅢ | A small amount of bainite + martensite + carbide |
Application
Designation of rolls | Material code | Application |
Centrifugal cast iron rolls (Ⅰ) | HCrⅠ | Beam, bar, wire rod mill finishing stand; Tropical rough rolling and rolling and finishing work roll front; Wide plate mill work roll; |
Centrifugal cast iron rolls (Ⅱ) | HCrⅡ | Beam, bar, wire rod mill finishing stand; Tropical rough rolling and rolling and finishing work roll front; Wide plate mill work roll; |
Centrifugal cast iron rolls (Ⅲ) | HCrⅢ | Beam, bar, wire rod mill finishing stand; Tropical rough rolling and rolling and finishing work roll front; Wide plate mill work roll; |