tubing work roll
work roll:long work life
high strength of work roll
high wear-resisting of work roll
ISO9001
tubing work roll
1)Jinyu is specilized in metallurgical spare parts, possessing spare parts research, development and fabrication. It has full capacity to manufacture shear blades of different materials, Including high-grade alloy tool steel, High speed steel, carbide alloy, Overlay welded steel with different profiles, rectangular, V-shaped, Circular, Curved and section, Metallurgical cold and hot rolling mill rolls, Sendzimir rolls, Slim rolls for different kinds of plate levelling rolls, casting rolls assembly etc.
2)The materials of work roll for heavy plate leveller mainly include X40CrMoV51 and 56CrNiMoV7 which have been proved with very good heat-resistant and long life.
The materials of work roll for sheet leveller has been used with advanced technology and new materaisl which has been proved with very good wear-resistant and long life.
| Rough Cylindrical | Φ65±0.5 |
| Thermal Refining | HB200-250 |
| Finish Turning Cylindrical | Φ57.50+0.2 |
| To stress tempering,and straightening | The Curvature<0.3 |
| Coarse grinding cylindrical | Φ55±0.1- Φ56.20+0.1 , Φ350-0.02-Φ36.2±0.1 |
| Barrel surface hardening | HRC62-64, Depth>3mm |
| Grinding roller boby | Φ54.940+0.02 |
| Both sides of the cylindrical | Φ350-0.02-Φ35.080+0.02, Φ300-0.02-Φ30.60+0.02 |
| Cylindrical | Φ200-0.02-Φ20.20+0.02, Φ270+0.02- Φ27.50-0.02 |
technical data
| GB | Chemical composition(mass fraction)/% | |||||||||
| C | Si | Mn | Cr | Mo | V | Ni | Cu | S | P | |
| 9Cr2 | 0.80~0.95 | ≤0.40 | ≤0.40 | 1.30~1.70 | __ | __ | __ | __ | ≤0.030 | |
| 8Cr2MoV | 0.80~0.90 | 0.15~0. 40 | 0.30~0.50 | 1.80~2.40 | 0.20~0.40 | 0.05~0.15 | ≤0.25 | ≤0.25 | ||
| 9Cr2Mo | 0.85~0.95 | 0.25~0.45 | 0.20~0.35 | 1.70~2.10 | 0.20~0.40 | __ | ||||
| 9Cr2MoV | 0.20~0.30 | 0.10~0.20 | ||||||||
| 9Cr3Mo | 2.50~3.50 | 0.20~0.40 | __ | |||||||
| 8Cr3MoV | 0.78~1.10 | 0.40~1.10 | 0.20~0.50 | 2.80~3.20 | 0.20~0.60 | 0.05~0.15 | ≤0.80 | ≤0.25 | ≤0.025 | |
| 8Cr5MoV | 0.78~0.90 | 0.40~1.10 | 0.20~0.50 | 4.80~5.50 | 0.20~0.60 | 0.10~0.20 | ≤0.020 | |||
surface hardness of barrel roll
| serial number | surface hardness of barrel roll(HSD) | Recommended for |
| 1 | ≥95 | work roll of pinch pass mill and finishing mill |
| 2 | 90~98 | cold work roll of metal plate and strip |
| 3 | 75~90 | cold work roll of metal plate and strip |
hardening layer hardness of cold barrel roll
| barrel roll diameter/mm | surface hardness of barrel roll(HSD) | hardening layer hardness/mm | ||
| 2%Cr | 3%Cr | 5%Cr | ||
| ≤300 | ≥95 | 6 | 15 | 15 |
| ≤300 | 90~96 | 8 | 20 | 20 |
| ≤300 | 75~90 | 10 | __ | __ |
| 301~500 | ≥95 | 7 | 20 | 25 |
| 301~500 | 90~96 | 12 | 25 | 30 |
| 301~500 | 75~90 | 14 | __ | __ |
| >500 | ≥95 | 8 | 20 | 25 |
| >500 | 90~96 | 13 | 25 | 35 |
| >500 | 75~90 | 15 | __ | __ |
