(Enhanced) High chromium cast iron centrifugal composite roll
Main Features:
The chromium content of the shell of such roll is between 12-22%, after special heat treatment, the barrel shell obtains matrix of troostite + a small amount of martensite and residual austenite, the lumpy, island-like, or chrysanthemum-like (Cr • Fe) 7C3-type eutectic carbide is evenly distributed in the structure. Such carbide has high microhardness, therefore, the Hi-Cr iron roll has excellent wear resistance and heat fatigue resistance.
Chemical Composition（%）：
Materials | Code | Chemical Composition（%） | ||||||||
C | Si | Mn | P | S | Cr | Ni | Mo | V | ||
Hi-Cr centrifugal composite Ⅰ | HCrⅠ | 2.30 ～ 3.30 | 0.30 ～ 1.00 | 0.50 ～ 1.20 | ≤ 0.10 | ≤ 0.05 | 12.00 ～ 15.00 | 0.70 ～ 1.70 | 0.70 ～ 1.50 | ≤ 0.60 |
Hi-Cr centrifugal composite Ⅱ | HCrⅡ | 2.30 ～ 3.30 | 0.30 ～ 1.00 | 0.50 ～ 1.20 | ≤ 0.10 | ≤ 0.05 | 15.01 ～ 18.00 | 0.70 ～ 1.70 | 0.70 ～ 1.50 | ≤ 0.60 |
High-Cr centrifugal composite Ⅲ | HCrⅢ | 2.30 ～ 3.30 | 0.30 ～ 1.00 | 0.50 ～ 1.20 | ≤ 0.10 | ≤ 0.05 | 18.01 ～ 22.00 | 0.70 ～ 1.70 | 0.70 ～ 1.50 | ≤ 0.60 |
Physical properties：
Material Code | Barrel hardness（HSD） | Roll neck hardness（HSD） | Tensile strength （MPa） | Shell thickness（mm） |
HCrⅠ | 60～75 | 32～45 | ≥350 | It shall be determined according to roll diameter range. |
HCrⅡ | 65～80 | 32～45 | ≥350 | It shall be determined according to roll diameter range. |
HCrⅢ | 75～90 | 32～45 | ≥350 | It shall be determined according to roll diameter range. |
Main Application:
Work roll and vertical roll for hot strip finishing mill’s early-stand ; work roll for thin slab continuous casting and rolling finishing mill’s early-stand ; work roll for leveling machine and medium plate mill; sleeve for cold strip mill and section steel mill , etc.;
For rolls the maximum furnace capacity is approximately 40 tons.
Although the maximum weight of finished machined products are approximately 26 tons.
Please contact the Marketing Department for more detailed information.
