With the development of steel product market, more and more suppliers spend much time with the desire for advanced standard quality steel products. Spheroidal graphite cast iron roll can be considered the one of steel products with the most highly Competitive market.we should learn about the basic knowledge about the cast iron rolls
What are the Spheroidal Graphite Cast Iron roll(Nodular 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(Nodular 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 a 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 is 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 TINVO mill rolls are often used for rest energy casting.
China manufacturers 