BCI Bainitic Nodular Cast Iron Rolls Bainitic Ductile Iron Rolls Rolling Mill Rolls
Bainitic Ductile Iron Rolls Description:
Nickel, manganese, chromium, molybdenum and other alloying elements are added to the ductile iron roll. Its matrix is acicular structure (bainite+small martensite), which has higher strength and better strength than pearlite spheroidal graphite. It is produced by two methods: static casting and centrifugal casting. However, due to the high alloy content and high casting fatigue. The ideal comprehensive performance can be obtained by using the centrifugal composite casting process.
Bainitic Nodular Cast Iron Rolls Application:
Rolls are mainly used in roughing stands and Intermediate stands , bimetal composite casting technology, excellent wear resistance compact structure. Stable performance
Bainitic Nodular Cast Iron Rolls Chemical Composition:
The composition of bainitic nodular cast iron (NCC) rolls is a crucial factor that determines their mechanical properties and performance in demanding industrial applications. These rolls are engineered with specific alloying elements and controlled chemistry to achieve the desired combination of hardness, wear resistance, and toughness. The composition of bainitic nodular cast iron rolls typically includes the following elements:
| C | Si | Mn | Cr | Mo | W | V | B |
| 2.0-3.5 | 0.7-1.3 | 0.8-1.5 | 0.5-1.5 | 0.2-1.0 | 0.5-1.5 | 0.2-1.0 | 0.2-1.2 |
Bainitic Ductile Iron Rolls Properties:
| Mpa | HSD | Mpa.m½ | J/cm² |
| 500-700 | 55-65 | 35-40 | 6-12 |
Bainitic Ductile Iron Rolls Production Process:
1. Material Selection
High-quality raw materials, typically scrap iron and alloying elements such as nickel, chromium, and molybdenum, are carefully selected to meet the desired chemical composition.
2. Melting
The selected materials are then melted in an electric arc furnace or induction furnace to achieve the desired composition and temperature.
3. Casting
The molten iron is cast into the desired roll shape using sand molds or centrifugal casting techniques.
4. Heat Treatment
The cast rolls undergo a series of heat treatment processes, including austenitization and controlled cooling, to achieve the bainitic microstructure and the desired hardness.
5. Machining
After heat treatment, the rolls are machined to precise dimensions, including their final profile and surface finish.
6. Nodularization
Nodular graphite is achieved through the addition of nodularizing agents like magnesium or cerium during the casting process.
7. Final Inspection
Each roll undergoes rigorous quality control measures to ensure it meets the specified standards and tolerances.
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