Pearlitic Nodular Cast Iron Roll
Introduction
Pearlitic nodular cast iron roll is a kind of spheroidal graphite iron roll, which is known as ductile iron roll and is a roll made by spheroidizing the molten iron with magnesium and pouring it into the sand-lined cold type. Due to the spheroidizing treatment, the graphite carbon inside the cast iron is changed from flake to spheroid, which eliminates the phenomenon of graphite tip stress concentration caused by flake graphite, which significantly improves the strength of cast iron, similar to the cast steel roll, but the abrasion resistance is much higher than the cast steel roll. There are three types of nodules of magnesium, cerium, and calcium and magnesium are commonly used. Spheroidal graphite iron roll can be applied in open-rolling mills, roughing mills and rolling mills before finishing rolling on various sections and plates. When the finished roll bears a large load, it is best to use a ductile iron roll with a casting groove, high strength and excellent wear resistance.
Pearlitic nodular cast iron roll has a high content of Ni and Mo alloys and the pearlite, basanite and martensite matrixes with excellent performance. It has good strength, high-temperature performance and anti accident performance with small hardness drop on the work layer. The nodular cast iron roll usually is used in large blanking machines, section steel tandem rolling, bar and wire rough rolling, intermediate rolling mill. TINVO is a professional manufacturer for a pearlitic iron roll with advanced technology and best prices, the standard of ISO, GB, ASTM, DIN, JIS is guaranteed.
For pearlite nodular cast iron, pearlite content in the matrix structure accounted is more than 80% of ductile iron (nodular iron). The ductile iron conforms to Chinese national standards QT600-2, QT700-2 and QT800-2 belong to pearlite nodular cast iron. This type of ductile iron is usually obtained by normalizing treatment, or it can be obtained by adding alloying elements and cooperating with technological measures. The nodular cast iron roll is mainly used to manufacture parts that require high strength, with certain fatigue strength and wear resistance.
Chemical Composition
Roll name | C | Si | Mn | Cr | Ni | Mo | Mg |
AF1 | 3.00~3.50 | 1.60~2.40 | 0.40~1.00 | 0.10~0.40 | 1.20~2.00 | 0.20~0.60 | ≥0.04 |
AF2 | 3.00~3.50 | 1.40~2.20 | 0.40~1.00 | 0.20~1.00 | 1.50~2.50 | 0.30~0.80 | ≥0.04 |
AF3 | 3.00~3.50 | 1.20~2.0 | 0.40~1.00 | 0.20~1.00 | 2.00~3.00 | 0.30~0.80 | ≥0.04 |
Physical Properties
Roll name | Roll-body hardness HSD | Tensile strength Mpa |
AF1 | 40~55 | ≥360 |
AF2 | 50~65 | ≥360 |
AF3 | 60~72 | ≥360 |
