Forging Steel Roll
Forged steel rolls have toughness, surface hardness uniformity and fatigue resistance and widely used to the cold rolling mill. The mill rolls are made from steel ingots by forging. Forging can solve metallurgical defects such as loose and shrinkage holes in the ingot, and crush the coarse cast structure to obtain a high-quality roll with dense structure and uniform composition. The production process of forged steel rolls includes smelting, ingot casting, forging, post-forging heat treatment, rough processing, final heat treatment and finishing. The rolls are heat-treated differently depending on the material and application. They are mainly used as strip rolling mill working roll and backup roll, H-type steel universal–shaft, High-speed roll(HSS roll), Cr4 steel backup roll, Cr5 forged steel roll. The forged steel rolls produced by TINVO which is a professional rolling mill roll manufacturer in China, have the standards of ISO, GB, ASTM, DIN, JIS, OEM and ODM available.
Forged steel rolls have better toughness, surface hardness uniformity and fatigue resistance than similar casting rolls. In order to meet the specific requirements of different rolling mills and rolling conditions, different alloy elements can be added into the steel for improving the performance of rolls.
Application
Cold rolling mill work roll and strip rolling mill working roll and backup roll
H-type steel universal –shaft
Hi-speed steel mill roll
Cr4 steel backup roll
Cr5 forged steel roll
86CrMoV7 forged steel roll
42CrMo forged steel roll
MC2, MC3, MC5, MC6 forged steel roll
Chemical Composition
| Roll name | C | Si | Mn | Cr | Mo | V |
| 42CrMo | 0.38~0.45 | 0.17~0.37 | 0.50~0.80 | 0.90~1.20 | 0.15~0.25 | / |
| 3%Cr | 0.3~0.55 | 0.2~0.5 | 0.2~1.0 | 2.5~3.5 | 0.2~0.6 | 0.05~0.2 |
| 5%Cr | 0.3~0.55 | 0.2~0.5 | 0.2~1.0 | 4.5~5.5 | 0.2~0.6 | 0.05~0.2 |
| 9Cr2Mo | 0.85~0.95 | 0.25~0.45 | 0.2~0.35 | 1.7~2.1 | 0.2~0.4 | / |
Physical Properties
| Roll name | Roll-body hardness HSD | Tensile strength Mpa |
| 42CrMo | 30~42 | 1080 |
| 3%Cr | 56~69 | 1100~1470 |
| 5%Cr | 60~75 | 1200~1500 |
| 9Cr2Mo | 65~105 | 1100~1400 |
