Cold-rolling roller produced in Dongbei Special Steel Group via ESR process has good purity, homogeneity in internal structure. The 86CrMoV7, 1.7m in length cold-rolling roller blank was awarded the Golden Prize in 1994 at the fifth Asian Pacific International Trade Exposition. Dongbei Special Steel Group developed MC3、MC5 and semi-high speed steel series of cold-rolling rollers, which have high hardenability, good abrasion resistant and comprehensive mechanical properties. The deep hardening cold rolling roller (MC5) was developed by the cooperation with Baosteel.

Dongbei Special Steel Group produces different kinds of rollers with fine, uniform microstructure for hot-rolling mill and continuous casting machine.

Specification for Cold/Hot Rolling Roller And Roller Blank

Classification

Roll Body
Diameter
(mm)

Grade

Finished Roller Performance

Manufacturer

Roller Body
Hardness

Depth of
Hardening Zone
(mm)

Noxious
Element

Micro-macro
Structure

Cold-rolling roller
and roller blank

working roller：Φ210~665

9Cr2、9Cr2Mo、9Cr2W、9SiCr、86CrMoV7、MC3A、MC3B、MC5、9Cr3Mo、9Cr2MoV、8CrMoV、8Cr5Mo2SiV

roller body：
90-96HS
homegeneity：
±1.5HS
roller neck：
30-60HS

Cr2系：13-16
Cr3系：20-30
Cr5系：30-40

[H]≤2PPm
[O]≤50 PPm
[N]≤200 PPm
S≤0.020％
P≤0.020％

structure 1-4
A inclusion≤1.5
B inclusion≤1.5
No crack, shrinkage、flake
General porosity≤3
Center porosity≤3
Segregation≤3

Beiman

middle roller：Φ300~700

backup roller：Φ400~750

smoothing roller：Φ400~850

Hot-rolling roller
and roller blank

Φ400~850

45Cr、55Cr、42CrMo、50CrMo、60CrMo、60CrNiMo、H13、0CrMnMo、60CrMoV、70Cr3Mo、70Cr3NiMo、50CrNiMoV

roller body：
50~75HS
homegeneity：
±2.0HS
roller neck：
40-60HS

Cr系：15-25
CrMo系：20-35

P≤0.25
S≤0.25
Cu≤0.25

Crack, shrinkage, flake and bubble without visualization

Continuous casting
roller and roller
blank

Φ180~500

Hz102f
R73
BCR01

20-41HS

[N]≤200ppm
[H]≤3ppm     
S、P≥0.020%

δb≥700MPa
σs≥600MPa 
δ5≥20％
ψ≥50％
аk≥150J/cm2