Concerning how to find the reliable mill rolls manufacturers to meet the requirements of the buyer for high-quality adamite rolls, firstly, we need to learn basic knowledge of the adamite rolls.
What are Adamite Rolls?
The adamite rolls also called adamite steel rolls, have better strength and toughness than cast iron roll. It is widely used for work rolls in hot rolling mills. The adamite rolls are statically cast and go through a multi-stage heat treatment process followed by Tempering phases in order to develop the combination of hardness, toughness and wear resistance.
Adamite rolls chemical composition
The adamite roll materials can be considered as composite materials of two phases of coarse carbides and matrix. As a consequence, the hardness of these roll materials may be markedly affected by the amount and hardness of coarse carbides. The carbon content of the alloy adamite roll is usually between 1.2-2.3% and the rest alloy elements contain Cr, Ni, Mo V, etc. The free carbide mass fraction is generally about 6% to 10% with small hardness drop, good wear resistance, good toughness, significantly reduced consumption. The Standard includes ISO, GB, ASTM, DIN, JIS.
Applications of Adamite Rolls
work roll
back-up roll
vertical roll for large-class
medium-class rough rolling mill
intermediate rolling mill of section steel and wire rod
Wire rod and bar steel roughing
hot rolling steel strip
How to find a trustworthy Adamite rolls manufacturer
If you want to find a trustworthy manufacturer with long-term cooperation, maybe you need to concern about as the following
1.Mill rolls equipment
Mill rolls equipment plays an important role for the high quality mill rolls. Types of equipment matters from the beginning to the finished products. Compared with alloy cast steel roll, adamite roll has a good abrasion resistance through a special heat treatment process, so for the products, the equipment ever much more important.
2.Quality Control
Different stages of production have to follow controlling parameters to ensure that the production department is working with the required efficiency. To get the quality mill roll, quality is absolutely necessary
3. Technological Advancement of the manufacturer
A reliable manufacturer will focus on technological advancement for its long-lasting development. The advanced technology can guarantee the improvement of products. The best supplier not only can provide high-standard products but also is the steel solution provider. Before choosing the company you should ensure the manufacture has a professional team for advanced technology.
4. Delivery time and price of the company
Delivery time often is the main factor to choose the supplier. Delivery on-time is also the basis of next time cooperation. Checking out the place of the company and the delivery term is essential. Price is also an important element for a best-value mill roll manufacturer.
Basic knowledge about the adamite rolls has been introduced with the definition, the chemical composition, the application and how to find a reliable manufacturer. If you want to look for a reliable supplier for the high-quality adamite rolls, TINVO is worth for your choice.
Spheroidal graphite iron roll also known as ductile iron roll, can be considered one of the steel products with the most highly competitive market. Firstly, we introduce about the basic knowledge about the mill rolls.
What are the Spheroidal Graphite Cast Iron Roll
The Spheroidal graphite cast iron roll also called nodular cast iron roll or Ductile Iron Rolls are applied in hardness & composition mills producing different steel products. The cast iron roll is structurally made up of cementite and nodular graphite. Sufficient water cooling is a necessity for satisfactory performance. The matrix structure varies from Ferrito-Pearlitic, Pearlitic to Bainitic & Martensitic together with different carbide contents and graphite in the form of spheroids/nodules. Some critical grades are heat treated for higher strength.
The kinds of the Spheroidal Graphite Cast Iron Roll
There’re four kinds of alloy chilled cast iron rolls depending on the Physical Properties, wear resistance, hardness and strength.
Pearlitic Nodular Cast Iron Roll
Pearlitic nodular iron roll mixes cast iron with nickel, chromium, molybdenum nodular cast iron, through special heat treatment. The cast iron roll has good strength, high-temperature performance and anti accident performance, small hardness drop on the work layer with the standard of ISO, GB, ASTM, DIN, JIS.
Application
Large blanking machine.
Section steel tandem rolling.
Bar and wire rough rolling.
Intermediate rolling mill.
Centrifugal Composite Cast Iron Roll
The cast iron rolls are high-speed steel rolls, produced by horizontal centrifugal casting process, are all compound rolls with high-speed steel as the work layer and nodular iron as the core. The material of centrifugal composite cast 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.
Application
working roll for hot-rolled strip leveling rack.
Rack of tandem rolling mill for section, bar, wire rod and narrow strip.
Roll ring and roll of stretch reducing mill for seamless steel tube.
Work roll of hot-rolled strip tempering rack and medium plate mill rack.
Tandem rolling bar and rack of high-speed wire mill.
Alloy Ductile Cast Iron Roll
The alloy ductile cast iron roll is made of acicular nodular cast iron mixing with nickel, chromium, molybdenum through a special heat treatment to obtain the ductile iron rolls.
Application
Blanking rolling mills roughing mills
Rolling mills before finishing rolling for section steel, bar, wire rod, narrow strips and plate steels
.
work roll for seamless steel tube rolling mill
Bainitic Nodular Cast Iron Roll
Bainite ductile cast iron roll is made of Ni, Mn, CrH, Mo, etc with acicular structure(Bainite and a few Martensite) and would be higher strength and better toughness than pearlite ductile iron roller, besides, the wear resistance is improved much obviously.
Due to the high alloy content and high casting stress, the acicular bainite ductile iron roll can obtain the ideal comprehensive performance by a centrifugal composite casting process.
The feature of bainitic nodular cast roll is that it shaped into graphite ball and its performance can be compared with that of alloy indefinite chilled roll, and its intensity is higher than that of infinite chilled one.
Application
This kind of cast iron rolls is often used for rest energy casting.
How to find a reliable supplier for spheroidal graphite cast iron roll
To find a supplier for spheroidal graphite cast Iron roll is easy, but to find a trustworthy mill roll manufacturer with advanced technology and high quality, the things need to consider as below for your references.
1. composition and hardness for spheroidal graphite cast iron roll
nodular graphite material with excellent strength and hardness can withstand heavy loads, so the cast iron rolls require a wide range of composition and hardness with advanced technology. The manufacturer can provide superior heated technology for the ductile Iron Roll. So check the composition technology for the alloy spheroidal graphite cast Iron roll is necessary.
2. Product range
The spheroidal graphite cast iron roll can be used in hardness & composition for a variety of applications including wire rod roughing and intermediate rolling, slabbing and blooming mills and rail and structural mills with high tensile strength and deep hardness penetration. A nodular cast iron roll manufacturer will have the ability to provide a wide range of products to meet the different requirements and applications of customers.
3. Qualification Certification
The qualification certification for a steel plant is essential. As a mill roll requiring high-standard technology, the spheroidal graphite cast iron roll needs a different quality standard. Often the ISO is the most common standard. The other quality certification like GB, ASTM, DIN, JIS also need to be considered for choosing the supplier.
4.Deals and Discounts
The buyer for alloy spheroidal graphite cast iron roll often quote from several suppliers. The best deals and discounts offered by the manufacturer also need to be considered for best-value products.
5. Delivery Time and Method
Delivery on-time is on the basis of cooperation and important for trade. Before choosing a trustworthy supplier, checking out the delivery term about the address of the factory and distribution, shipping method and time is necessary.
Find more professional information about the spheroidal graphite cast iron roll, please visit the website of TINVO.
A steel shaft forged to near net shape will benefit from the forging process and can be used in any application that endures high stress, impact strength, long fatigue life and high temperatures. TINVO manufactures forged shafts in an assortment of geometries and a wide range of materials. Forged shafts have economical and quality advantages as opposed to machining shafts from bar stock. A shaft has varying geometries saving on material cost and machining time. Additionally, a shaft has a grain flow following the forged configuration of the shaft thereby yielding outstanding grain structure and the best combination of mechanical properties.
Capability:
Max Diameter: 1000 mm
Max Length: 9000 mm
Max Weight: 40 T
Tolerance: 0.01mm
Material:
Carbon Steel: ASTM A105, ASTM A350 LF2 :
ASTM A694 F42/F50/F60/65/F70 S355J2G3
Alloy Steel: F1,F5,F9，F11, 4130, 4140,8620, 20CrMnMo, 42CrMo4,34CrNiMo6, 18CrNiMo7-6 etc.
Stainless Steel: F321，F304,F304L,F316, F316L, F312L,F321, F347, F347H.
Double Stainless Steel: 1.4462, F51, S31803; F60, S32205; F53, S32750
Hastelloy: Inconel 625 & Monel K500
Process:
Raw Material Inspection →Cutting→ Inspection → Preheat → Forging → Heat Treatment → Inspection → Rough Machining → NDT →Testing → Finishing Machining →NDT →Inspection → Packing→ Delivery.
Tungsten carbide roll is an important part of the steel bar with a mass diameter ≤480mm and thickness ≤130mm. It is primarily applied in high-speed wire 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 rings 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, instrument and so on. TINVO is your trustworthy manufacturer in China with an annual production capacity of 200 tons, which fully meets the steel bar and wire rod manufacturers' demand for the tungsten carbide roll. TINVO carbide roll bushing has the standards of ISO, GB, ASTM, DIN, JIS, OEM and ODM available.
The Facts about The Carbide Ring:
1. The carbide 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 rings can keep their shape and luminescence time for any other ring on the market for a long time.
4.Carbide ring, known as the "permanent polishing ring"
5. Carbide rings do not bend.
Application
bar & wire rod mill, hot strip mill, cold strip mill, PC mill, section mill, plate rolling mill, non-ferrous mill, seamless pipe rolling mill carbide ring, high-speed finishing mill roll sleeve, etc.
High-performance high-speed steel roll rings (HSS ring)
Material characteristics
High-speed steel roll ring material (HSS roll ring): The HSS roll ring is a steel-based roll ring that implements the national cast steel roll standard GB / T1503-2008. Its main alloy components are vanadium, nickel, tungsten, molybdenum, niobium, cobalt, etc., The carbon content is less than 1.6%, the phosphorus content must be controlled below 0.03%, the chromium content must be controlled below 5%, and the sulfur content must be controlled below 0.03%, so that its wear resistance and impact toughness are fully guaranteed, as well as ensure that the roller ring will not appear micro-cracks, block loss, ring burst phenomenon in use. In particular, the tungsten content is strictly controlled, and segregation will not occur during centrifugal casting, so the hardness drop after each re-grinding is small, and the amount of steel passing will not decrease significantly.
Manufacturing process
Tooling design – modeling - smelting - centrifugal casting - thermal insulation – unpacking - flaw detection - heat treatment after roughing - flaw detection-hardness testing - semi-finishing & testing - finishing & testing - metallographic inspection - factory inspection - wrap up and store.
All roll rings of TINVO are inspected 3 times one by one to ensure the inherent quality of the roll rings. All roll rings are tempered 3 times to obtain the best metallographic structure to ensure the best performance of mill rolls.
Spheroidal graphite iron roll also 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
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.
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.
Centrifugal Composite Cast Iron Roll
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.
Thanks to its higher content of Ni and Mo alloys, basanite and martensite matrixes with excellent performance are produced. There are small changes in hardness. It is extremely efficient in toughness, preserving heat split, preserving surface coarse and abrasion-resistant.
Application
working roll for hot-rolled strip leveling rack;
Rack of tandem rolling mill for section, bar, wire rod and narrow strip
Roll ring and roll of stretch reducing mill for seamless steel tube
Work roll of hot-rolled strip tempering rack and medium plate mill rack
Tandem rolling bar and rack of high-speed wire mill
Bainitic Nodular Cast Iron Roll
Bainitic nodular cast iron roll is made of Ni, Mn, CrH, Mo, etc. It has an acicular structure and would be higher strength and better toughness than pearlite iron. Due to the high alloy content and high casting stress, the acicular bainite ductile iron roll can obtain the ideal comprehensive performance by a centrifugal composite casting process. The feature of bainitic nodular cast roll is that it shaped into graphite ball and its performance can be compared with that of alloy indefinite chilled roll. Its intensity is higher than that of indefinite chilled one, so it is usually used for rest energy casting. Based on the analysis of the macro and microstructures of conventional Ni-Mo bainite ductile cast iron rolls used in bar finishing mills, we have found that the main cause of the spalling failure of the roll surface layer is the low bainite mass fraction in the roll structure, Irrational distribution of carbide morphology, and non-round graphite morphology.
On this basis, by optimizing the mass fraction of alloying elements of conventional bainite nodular cast iron composite rolls (nickel, copper, niobium composite alloying), the purpose of optimizing the structure and properties of the rolls is achieved. The structure of the improved roll is finer, and its carbide morphology has been significantly improved; meanwhile, the addition of alloying elements has significantly improved the bainite strength in the material, and its impact toughness, deflection, section shrinkage, and elongation after fracture are significantly improved compared with conventional Ni-Mo ductile iron, so it can significantly extend the service life of rolls and effectively reduce the production cost of steel.
Alloy Ductile Cast Iron Roll
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 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.
Application
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, Mill rolls for seamless steel tube Intermediate and finishing roll rack of rolling mill for section steel, bar, wire rod and narrow stripFor more detailed information, please visit the page of TINVO rolling mill rolls.