work rollers of continous rolling mill
good quality of work roller
reasonable price
good after-services
HRC60-63
work rollers of continous rolling mill
1. Material: Alloy Steel, Carbon Steel
2. Best Quality, Competitive Price
3. Process: Free Forging
4. Full set Q.A Document
1. Material: 9Cr2MoV, Carbon Steel and Stainless Steel
2. Standard: ASTM, DIN, JID, EN
3. Process
LF+VD→electroslag remelting →steelingot→heating→forging→heat treatment→inspection→testing→submission→roughing processing→testing→submission→ roughing processing→ quenching and tempering→ testing→submission.
4. Types and specifications of forgings
Shape | Diameter(m) | Length(m) | Weight(MT) | Material |
Shafts | ≤ 1.5 | ≤ 12 | ≤ 40 | Alloy Steel: 4145 H , 4130, 4140, 4340 etc.
Carbon Steel: CK35 , CK45 etc.
Stainless Steel: 1Cr13, 2Cr13
Tool Steel: H11 , H13 etc. |
Blocks &Bars | ≤ 1 | ≤ 11 | ≤ 25 | |
Pipe | ≤ 1.5 | ≤ 12 | ≤ 40 | |
module | ≤ 1.5 | ≤ 12 | ≤ 20 | |
Sleeves | ≤ 1.5 | ≤ 2 | ≤ 10 |
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 | __ | __ |
