fushun

Work Roll Backup Roll Step Shaft Mian Shaft Forged Steel Roller

Group Steel Forgings
Min. Order 1 metric ton
Terms of Payment L/C, D/A, D/P, Western Union, T/T
Update Time 2019-06-10
Item specifics
OD200mm-2000mm
WeightMAX 85 Tons
working roll for hot rolled strip leveling rackRack of tandem rolling mill for section, bar, wire rod and narrow strip
Roll ring and roll of stretch reducing mill for seWork roll of hot rolled strip tempering rack and medium plate mill rack
Introduce:

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 HSS contains plenty of alloyed 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 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.

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