High NiCr Indefinite Chilled Composite Spin-Cast Roll
This type of indefinite chilled cast iron roll is made of high chromium, nickel and molybdenum alloy elements. It has a double chemical. Through alloying in ordinary high nickel-chromium molten steel, the strong carbide-forming elements like niobium, tungsten, and vanadium are added at a certain ratio, and the type of carbides is changed to form high-hardness and finely mixed carbides while changing the density of precipitated particles. The outside has high tensile strength and the inside is a lower one. The hardness drop is lower, so it has high wear resistance. It is usually used for the finishing mill to roll the final material, the angles, bars, flats and so on. TINVO is a professional manufacturer for the chilled cast iron roll with quality standards of ISO, GB, ASTM, DIN, JIS.
Application
bar & wire rod mill, hot strip mill, cold strip mill, PC mill, section mill, plate rolling mill and nonferrous mill etc.
Chemical Composition
| Roll name | C | Si | Mn | P | S | Ni | Cr | Mo |
| Cr-Mo infinite chilled cast iron roll | 3.20~3.70 | 0.80`1.20 | 0.60~1.00 | ≤0.20 | ≤0.10 | / | 0.60~1.20 | 0.20~0.60 |
| Ni-Cr-Mo infinite chilled cast iron roll（I） | 3.20~3.70 | 0.80`1.20 | 0.60~1.00 | ≤0.20 | ≤0.10 | 0.50~1.00 | 0.70~1.20 | 0.20~0.60 |
| Ni-Cr-Mo infinite chilled cast iron roll（II） | 3.20~3.70 | 0.60~1.00 | 0.60~1.00 | ≤0.20 | ≤0.10 | 1.01~2.00 | 0.70~1.20 | 0.20~0.60 |
| Ni-Cr-Mo infinite chilled cast iron roll（III） | 3.20~3.70 | 0.60~1.00 | 0.60~1.00 | ≤0.20 | ≤0.10 | 2.01~3.00 | 0.70~1.20 | 0.20~0.6 |
Physical Properties
| Roll name | Roll-body hardness HSD | Roll-neck hardness HSD | Tensile strength Mpa |
| Cr-Mo infinite chilled cast iron roll | 55~70 | 35~55 | ＞160 |
| Ni-Cr-Mo infinite chilled cast iron roll（I） | 60~72 | 35~55 | ＞160 |
| Ni-Cr-Mo infinite chilled cast iron roll（II） | 62~72 | 35~55 | ＞160 |
| Ni-Cr-Mo infinite chilled cast iron roll（III） | 65~75 | 35~55 | ＞160 |
Metallographic Structure
| Roll name | Metallurgical structure |
| Cr-Mo infinite chilled cast iron roll | Pearlite + cementite + a little graphite |
| Ni-Cr-Mo infinite chilled cast iron roll（I） | Pearlite + cementite + a little graphite |
| Ni-Cr-Mo infinite chilled cast iron roll（II） | Fine pearlite + cementite + a small amount of graphite |
| Ni-Cr-Mo infinite chilled cast iron roll（III） | Type body + cementite + a small amount of graphite |
