straightening roller
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straightening roller
roller:the high degree of hardness
high wear-resisting of roller
long work life of roller
iso9001
straightening roller
The steel roller has the high degree of hardness , the high resistance to wear, bears wearily, anti-corrosive, the outstanding anti-linking, the especially qualify stainless steel pipe production, and succeeds applies in the cold stamping, the cold pillar, stretches the mold.
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 | __ | __ |