Audited Supplier
High Cr cast iron rolls
Steel Rolling Equipment
ISO
Centrifugal Cast
65-95hsd
32-45hsd
1-50tons
CAMET
Steel Rack
ISO
China
Product Description
Centrifugal Casting High Cr cast iron roll
Properties
Thanks to its high content of M7C3 type carbide in the range of 20-30% and discontinuous network distribution of carbide, the roll offers a high wear-resistance performance. The matrix consist of tempered martensitic and sorbite with finely-dispersed secondary carbides (M7C3, M23C6 and M3C types), increasing therefore the wear-resistance of roll, the Cr2O3 enriched oxide film on the roll surfaces is highly resistant to oxidization and plastic strain, making the roll extremely suitable for steel hot rolling process.
Thanks to its high content of M7C3 type carbide in the range of 20-30% and discontinuous network distribution of carbide, the roll offers a high wear-resistance performance. The matrix consist of tempered martensitic and sorbite with finely-dispersed secondary carbides (M7C3, M23C6 and M3C types), increasing therefore the wear-resistance of roll, the Cr2O3 enriched oxide film on the roll surfaces is highly resistant to oxidization and plastic strain, making the roll extremely suitable for steel hot rolling process.
Chemical Analysis
| Grades | HSC | C | Si | Mn | Ni | Cr | Mo |
| HCrI | 60~75 | 2.3/3.3 | 0.3/1.0 | 0.5/1.2 | 0.7/1.7 | 12.0/15.0 | 0.7/1.5 |
| HCrII | 65~80 | 2.3/3.3 | 0.3/1.0 | 0.5/1.2 | 0.7/1.7 | 15.0/18.0 | 0.7/1.5 |
| HCrIII | 75~90 | 2.3/3.3 | 0.3/1.0 | 0.5/1.2 | 0.7/1.7 | 18.0/22.0 | 1.5/3.0 |
Mechanical properties
| properties | Barrel | Nick/corel - grey cast iron | Nick/corel - SG cast iron |
| Tensile strength (N/mm2) | 850 | 200 | 400 |
| Bending strength (N/mm2) | 1300 | 350 | 835 |
Microstructure
HCrI: bainite + martensite + carbide
HCrII: tempered martensite + eutectic carbide + small percentage secondary carbide
HCrIII: tempered martensite + eutectic carbide + small percentage secondary carbide
HCrI: bainite + martensite + carbide
HCrII: tempered martensite + eutectic carbide + small percentage secondary carbide
HCrIII: tempered martensite + eutectic carbide + small percentage secondary carbide
Application
Work rolls for roughing stands and front finishing stands of hot strip mill, work rolls for wide and medium plate mill
Work rolls for roughing stands and front finishing stands of hot strip mill, work rolls for wide and medium plate mill
