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Cold Rolling Mill Rolls
The Cr5 series is a super-deep hardened layer cold rolling roll material with a Cr content of about 5%. The hardened layer depth can reach more than 45mm. Through the scientific matching of chemical components and reasonable production processes, compared with the traditional Cr2 material and deep-hardened Cr3 material, it has excellent technical characteristics and is the preferred material for current cold continuous rolling mills.
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Material Characteristics
High Cr content, and the carbide type changes from M3C of Cr2 and Cr3 materials to M7C3, which improves the wear resistance of the roll;
The carbides are more refined and dispersed, with a deep hardened layer and improved fracture resistance;
It can ensure that the roll is used up to the scrap diameter without re-hardening.
Application Scope
Suitable for work rolls, intermediate rolls, backup rolls and leveling rolls of various specifications of cold rolling mills, as well as rolls for foil rolling mills and non-ferrous metal rolling mills such as copper and aluminum.
Roll Performance Parameters
|
Roll Application |
Hardened Layer Depth (mm) |
Roll Body Hardness (HSD) |
Roll Body Hardness Uniformity (HSD) |
Roll Neck Hardness (HSD) |
|
Work Roll / Intermediate Roll |
45 |
70-103 |
≤3 |
35-85 |
|
Backup Roll |
≥100 |
60-80 |
≤3 |
30-50 |
Chemical Composition
|
Material |
C |
Si |
Mn |
P |
S |
Cr |
Ni |
Mo |
V |
|
Cr5 |
0.82-0.90 |
0.5-0.8 |
0.2-0.5 |
≤0.015 |
≤0.015 |
4.8-5.2 |
0.3-0.5 |
0.2-0.4 |
0.1-0.2 |
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