| Casting Method: | Special Casting |
|---|---|
| Casting Form Material: | Graphite |
| Casting Metal: | Cast Iron |
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| 1.Description | ||||||||
| The high-Cr cast iron rolls are mase by centrifugal casting process, the working layer contains 12-22% | ||||||||
| chromium, through rational chemical composition allocations and different heat treatments, the matrix | ||||||||
| can be controlled as sorbite, troosite, bainite or martensite and certain kinds of carbides, such as Cr7, | ||||||||
| C3 eutectic carbites, Cr23C6 second carbites, Mo2C carbites etc. According to different purpose of use, | ||||||||
| the material of the core could be nodular iron or grey iron. | ||||||||
| 2. Chemical Analysis | ||||||||
| Classification | C | Si | Mn | P | S | Ni | Cr | Mo |
| Centrifugally Cast High Cr Iron Rolls i | 2.30~3.30 | 0.30~1.00 | 0.50~1.20 | ≤0.10 | ≤0.05 | 0.70~1.70 | 12.0~15.0 | 0.70~1.50 |
| Centrifugally Cast High Cr Iron Rolls ii | 2.30~3.30 | 0.30~1.00 | 0.50~1.20 | ≤0.10 | ≤0.05 | 0.70~1.70 | 15.0~18.0 | 0.70~1.50 |
| Centrifugally Cast High Cr Iron Rolls iii | 2.30~3.30 | 0.30~1.00 | 0.50~1.20 | ≤0.10 | ≤0.05 | 0.70~1.70 | 18.0~22.0 | 1.51~3.00 |
| 3. Mechanical Properties | ||||||||
| Material | Barrel Hardness(HSD) | Neck Hardness(HSD) | Tensile Strength | |||||
| Centrifugally Cast High Cr Iron Rolls i | 60~75 | 32~45 | ≥350MPa | |||||
| Centrifugally Cast High Cr Iron Rolls ii | 65~80 | 32~45 | ≥350MPa | |||||
| Centrifugally Cast High Cr Iron Rolls iii | 75~90 | 32~45 | ≥350MPa | |||||
| 4. Application Scope | ||||||||
| It's mainly used in front 3/4 of finish rolling frame of hot rolled strip continuous mills as well as rear | ||||||||
| frame for rough rolling. | ||||||||
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