The outer layer is a optimized carbide structure of high-carbon steel alloys containing Cr、Mo、W、V、Ni and Nb, which is inlaid into the martensite structure.
Through carbon control and comprehensive heat treatment process, the roll shows optimal wear and thermal fatigue resistant properties and surface of the oxide assumes a film structure. The residual stress is also reduced to a minimum.
| MECHANICAL PROPERTIES | |
| Hardness of shell | HSD75-85 |
| Hardness of core | HSD35-48 |
| Tensile Strength of core | ≥450MPa |
| C | Si | Mn | Cr | Mo | W | V | Nb |
| 1.6/2.3 | 0.3/0.9 | 0.2/0.8 | 3.0/6.0 | 3.0/6.0 | 1.0/4.0 | 2.0/6.0 | 1.0/3.0 |
