Specifications
1)centrifugal casting
2)ISO9001-2008
3)casting spare part for rolling mill
4)for finising stand
5)good preformance
Centrifugal casting high speed steel roll
1,Features
The Shell of Centrifugal casting High Speed Steel roll is a high carbon alloy steel containing Cr, Mo, W,V and Nb. The Microstructure consists of complex carbides embedded in a tempered martensitic martrix. Control of the carbon and a complex heat treatment allows the optimization of wear resistance, thermal fatigue resistance and oxide film formation, whilst maintaining low residual stress values.
2,Chemical composition
| Material Code | Chemical composition(%) |
| C | Si | Mn | W | V | Ni | Cr | Mo |
| HSS | 1.60~2.30 | 0.30~0.9 | 0.20~1.80 | 1.00~4.00 | 2.00~6.00 | 0.30~1.50 | 3.0~6.0 | 3.00~6.00 |
3,Physical Performance
| Material Code | Barrel hardness(HSD) | Tensile Strength( Mpa) |
| HSS | 75~90 | ≥450 |
4,Application scope
HSS rolls are mainly used as the work rolls in the hot strip mills and the finishing stands of bar mills; rings of the universal section mills and finishing stands of the high speed bar mills and so on.
5,Hardness
| 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 |
| 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 | __ | __ |
