HARBIN TINVO IMP. & EXP. TRADING CO., LTD

Bainitic Nodular Cast Iron Roll Introduction Bainitic 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 is 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,

Pearlitic Nodular Cast Iron Roll 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,

Chilled Cast Iron Roll Introduction There is no free graphite in the working layer of alloy chilled cast iron roll, it is featured as high hardness, good wear-resistance, micro metallographic micro-structure is fine pearlite and carbides. Application The finishing mill for section steel, wire rod, strip, thin plate and bar; The pre-finishing stands of high speed wire; With roll ring of stretch reducing mill for seamless steel tube.

Adamite Roll Introduction The semi-steel adamite roll is casted as a whole and there is no weak interface in compound casting roll, thus it has a better capacity, strength and toughness than cast iron roll. This kind of mill rolls can be used as work roll, back-up roll and vertical roll for large-class and medium-class rough rolling mill and intermediate rolling mill of section steel, wire rod, rail beams, steel billet, hot rolling steel strip. Most of the adamite steel rolls are produced by the static integral casting method. It must be subjected to high-temperature diffusion annealing. Generally, adamite rolls for steel rolling mills are required to control the total amount of non-metallic inclusions below 0.05%. The centrifugal composite semi-steel back-up rolls are made of adamite steel material, the body and neck of the rolls are made of nodular cast iron, and they have been successfully used in hot-rolled strip steel finishing mill.