Centrifugal Composite Cast Iron Roll

Inquiry

Share to

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. The quality standards of TINVO cast iron roll includes ISO, GB, ASTM, DIN, JIS.

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

 

Chemical Composition

Roll name

C

Si

Mn

P

S

Ni

Cr

Mo

Mg

Ni-Cr-Mo semi-chilled cast iron centrifugal composite roll

2.90~3.60

0.30~0.80

0.20~0.50

≤0.40

≤0.10

3.01~4.50

0.50~1.70

0.20~0.60

/

Ni-Cr-Mo infinite chilled nodular cast iron centrifugal composite roll

2.90~3.60

0.60~1.00

0.50~1.00

≤0.20

≤0.10

3.01~5.00

1.00~2.00

0.20~0.60

/

Ni-Cr-Mo nodular cast iron centrifugal composite roll(II)

2.90~3.60

1.00~2.20

0.40~0.70

≤0.10

≤0.10

2.51~3.50

0.10~0.60

0.40~1.00

>0.04

Ni-Cr-Mo nodular cast iron centrifugal composite roll(III)

2.90~3.60

1.00~2.20

0.40~0.70

≤0.10

≤0.03

3.51~4.50

0.20~0.80

0.40~1.00

>0.04

Cr-Mo chilled nodular composite cast iron roll

3.20~3.70

0.50~1.20

0.50~1.00

≤0.40

≤0.03

/

0.20~0.80

0.20~0.60

>0.04

Ni-Cr-Mo chilled nodular composite cast iron roll

3.20~3.70

0.50~1.20

0.50~1.00

≤0.40

≤0.03

0.50~1.00

0.20~0.80

0.20~0.60

>0.04

Ferrite nodular composite cast iron roll

2.90~3.60

1.00~2.20

0.50~1.00

≤0.10

≤0.03

1.00~3.00

0.10~0.60

0.40~1.00

>0.04

Pearlite nodular composite cast iron roll

2.90~3.60

1.00~2.20

0.50~1.00

≤0.10

≤0.03

2.00~3.00

0.10~0.60

0.40~1.00

>0.04

 

Physical Properties

Roll name Roll-body outer-layer  hardness HSD Roll-neck  (spherical core) hardness HSD Tensile strength 
 (spherical core) Mpa
Ni-Cr-Mo semi-chilled cast iron centrifugal composite roll 70-85 35-48 >300
Ni-Cr-Mo infinite chilled nodular cast iron centrifugal composite roll 65-85 35-48 >300
Ni-Cr-Mo nodular cast iron centrifugal composite roll(II) 55-75 35-48 >400
Ni-Cr-Mo nodular cast iron centrifugal composite roll(III) 60-80 35-48 >400
Cr-Mo chilled nodular composite cast iron roll 58-70 35-48 >300
Ni-Cr-Mo chilled nodular composite cast iron roll 60-72 35-48 >300
Ferrite nodular composite cast iron roll 45-55 35-48 >400
Pearlite nodular composite cast iron roll 55-65 35-48 >400

 

Metallographic Structure

Roll name Metallographic Structure
Ni-Cr-Mo semi-chilled cast iron centrifugal composite roll Martensite + a little bainite +cementite
Ni-Cr-Mo infinite chilled nodular cast iron centrifugal composite roll Bainite + a little martensite +cementite + a little graphite
Ni-Cr-Mo nodular cast iron centrifugal composite roll(II) Bainite + a little austenite +cementite + nodular graphite
Ni-Cr-Mo nodular cast iron centrifugal composite roll(III) Bainite + a little austenite +cementite + nodular graphite
Cr-Mo chilled nodular composite cast iron roll Pearlite + cementite + a little graphite
Ni-Cr-Mo chilled nodular composite cast iron roll Pearlite + cementite + a little graphite
Ferrite nodular composite cast iron roll Pearlite + a little ferrite + cementite + a little graphite
Pearlite nodular composite cast iron roll Pearlite + cementite + a little graphite

 

Enquiry