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.

Forged steel rolls have toughness, surface hardness uniformity and fatigue resistance and widely used to the cold rolling mill. The mill rolls are made from steel ingots by forging. Forging can solve metallurgical defects such as loose and shrinkage holes in the ingot, and crush the coarse cast structure to obtain a high-quality roll with dense structure and uniform composition. The production process of forged roll includes smelting, ingot casting, forging, post-forging heat treatment, rough processing, final heat treatment and finishing. The rolls are heat-treated differently depending on the material and application. They are mainly used as strip rolling mill work roll and backup roll, H-type steel universal–shaft, High-speed roll(HSS roll), Cr4 steel backup roll, Cr5 forged steel roll, 86CrMoV7 forged steel roll, 42CrMo forged steel roll, MC2, MC3, MC5, MC6 forged steel roll, etc.

HSS Roll High speed steel roll known as HSS roll are a kind of hot roll material with excellent performance. The application of high speed steel roll is an important component of the development of modern steel rolling production and another major technological change in the development of the steel industry. High speed steel rollers have higher hardness and wear resistance than traditional rollers. The centrifugal casting high-speed steel rollers have been widely used in the production of hot-rolled narrow strip steel, sheet steel, section steel, rebar, spring flat steel, high-speed wire and other fields. They are not only used for working rolls, but also for the back-up rolls.

The alloy ductile cast iron roll is made of acicular nodular cast iron mixing with nickel, chromium, molybdenum. It can be used in various blanking rolling mills for section steel, bar, wire rod and narrow strip, roughing mills, work roll for seamless steel tube, intermediate stand and finishing stand for section steel, bar, wire rod and narrow strip and rolling mills before finishing rolling for various sections and plate steels. The finished spheroidal graphite iron roll can also be used in the case of a low load. When the finished roll is subjected to a heavy load, it is preferable to use as a nodular cast iron chill roll with high strength and wear resistance. The TINVO mill rolls conform to the standards of ISO, GB, ASTM, DIN, and JIS, high quality with the best price guaranteed Alloy spheroidal graphite iron roll has a lot of usage following as: Blooming roll rack of rolling mills for section steel, bar, wire rod and narrow strip, Rolling mill work roll for seamless steel tube

Alloy Cast Steel Roll materials are eutectoid steel and hypereutectoid steel. Adding alloy content such as Cr, Ni, Mo, and V up to more than 0.8%, carbon content 0.4~1.3%. The matrix structure, after heat treatment of normalizing and tempering, becomes sorbite and tempered sorbite. This type of steel mill roll possesses high strength, good toughness, good resistance to hot cracking, and strong impact resistance. The cast steel roll employs monoblock casting process (single pour): Melting-Casting-Heat Treatment-Machining-Flaw Detection-Finished Products. It can be work rolls for blooming and slab mills, section roughing mill rolls, as well as backup rolls for hot-strip steel rolling mills. TINVO's alloy cast steel mill rolls conform to international standards, including ISO, GB, ASTM, DIN, and JIS.

The cast iron roll is produced by a horizontal centrifugal casting process with high-speed steel as the work layer and nodular iron as the core. The material of centrifugal casting iron roll contains plenty of alloying elements such as Mo, Ni, Cr, etc. The high hardened eutectic carbides & second carbides, evenly distributed in tempered martensitic matrix, make the wear and thermal cracking resistance very excellent. Besides, the resistance to surface roughing is also good. In a condition of hot rolling, the contact points between steel strip and the work rolls can form a thin adherent oxide film on the roll surface, which plays a good role in the wear features and the quality of the strip surface. The main application is as a working roll for hot-rolled strip leveling rack and rack of high-speed wire mill.

Tungsten carbide roll ring is an important part of the steel roll with a mass diameter ≤480mm and thickness ≤130mm. The tungsten carbide rolls for rolling mills is primarily applied in high-speed wire rod mill production lines, seamless pipe stretch reducing mill, three-dimensional rolls for cold-rolled ribbed steel bar, and composite roll for hot-rolled bar screw thread steel, etc. Carbide rolls are made of the hardest metal on earth, they are harder than titanium rings and longer than gold rings. This ring is usually used as a seal, disc cone, and so on. The Facts about The Tungsten Carbide Roll: 1. The carbide roll ring is the most wearable ring on earth. 2. tungsten is about 10 times harder than gold, 5 times harder than tool steel, 4 times harder than titanium. 3. Due to its extremely high hardness, tungsten carbide roll rings can keep their shape and luminescence time for any other ring on the market for a long time. 4.