Centrifugal casting mill roll for hot rolling machine
Properties
Thanks to its higher content of Ni and Mo alloys, pearlite, basinite and martensite matrixes with excellent performance are produced. The graphite si spherical form, demonstraing good heat transfer property and high tensile strength. Through changing the struture into basinite of marensite matrix, chemical compostion of needly-like spherical iron of heat treatment, a dense reticular primary cementite with high wear-resistance is produced
Chemical Analysis
| Designation of rolls | C | Si | Mn | P | S | Ni | Cr | Mo | Mg |
| CrMo semi-chilled SG cast iron rolls | 2.9/3.6 | 0.8/2.5 | 0.4/1.2 | ≤0.25 | ≤0.03 |
| 0.2/0.6 | 0.2/0.6 | >0.04 |
| CrMo indefinite chilled SG cast iron rolls | 2.9/3.6 | 0.8/2.5 | 0.4/1.2 | ≤0.25 | ≤0.03 |
| 0.2/0.6 | 0.2/0.6 | >0.04 |
| NiCrMo indefinite chilled SG cast iron rolls (I) | 2.9/3.6 | 0.8/2.5 | 0.4/1.2 | ≤0.25 | ≤0.03 | 0.5/1.0 | 0.2/0.6 | 0.2/0.6 | >0.04 |
| NiCrMo indefinite chilled SG cast iron rolls (II) | 2.9/3.6 | 0.8/2.5 | 0.4/1.2 | ≤0.25 | ≤0.03 | 1.0/2.0 | 0.3/1.2 | 0.2/0.8 | >0.04 |
| Pearlitic nodular cast iron rolls (I) | 2.9/3.6 | 1.4/2.2 | 0.4/1.0 | ≤0.15 | ≤0.03 | 1.5/2.0 | 0.1/0.6 | 0.2/0.8 | >0.04 |
| Pearlitic nodular cast iron rolls (II) | 2.9/3.6 | 1.2/2.0 | 0.4/1.0 | ≤0.15 | ≤0.03 | 2.0/2.5 | 0.2/1.0 | 0.2/0.8 | >0.04 |
| Pearlitic nodular cast iron rolls (III) | 2.9/3.6 | 1.0/2.0 | 0.4/1.0 | ≤0.15 | ≤0.03 | 2.5/3.0 | 0.2/1.2 | 0.2/0.8 | >0.04 |
| bainitic nodular cast iron rolls (I) | 2.9/3.6 | 1.2/2.2 | 0.2/0.8 | ≤0.10 | ≤0.03 | 3.0/3.5 | 0.2/1.0 | 0.5/1.0 | >0.04 |
| bainitic nodular cast iron rolls (II) | 2.9/3.6 | 1.2/2.0 | 0.2/0.8 | ≤0.10 | ≤0.03 | 3.5/4.5 | 0.3/1.5 | 0.5/1.0 | >0.04 |
Physical Properties
| Designation of rolls | Barrel hardness (HSD) | Neck hardness (HSD) | Tensile strength (MPa) |
| CrMo semi-chilled SG cast iron rolls | 40~55 | 32~50 | >300 |
| CrMo indefinite chilled SG cast iron rolls | 55~70 | 35~55 | >300 |
| NiCrMo indefinite chilled SG cast iron rolls (I) | 48~70 | 35~55 | >320 |
| NiCrMo indefinite chilled SG cast iron rolls (II) | 48~70 | 35~55 | >320 |
| Pearlitic nodular cast iron rolls (I) | 45~55 | 35~55 | >450 |
| Pearlitic nodular cast iron rolls (II) | 55~65 | 35~55 | >450 |
| Pearlitic nodular cast iron rolls (III) | 62~72 | 35~55 | >450 |
| bainitic nodular cast iron rolls (I) | 55~78 | 32~45 | >350 |
| bainitic nodular cast iron rolls (II) | 60~80 | 32~45 | >350 |
Microstructure
| Designation of rolls | Microstructure |
| CrMo semi-chilled SG cast iron rolls | Pearlite + cementite + SG + small percentage fermite |
| CrMo indefinite chilled SG cast iron rolls | Pearlite + cementite + SG |
| NiCrMo indefinite chilled SG cast iron rolls (I) | Pearlite + cementite + SG |
| NiCrMo indefinite chilled SG cast iron rolls (II) | Fine pearlite + cementite + SG |
| Pearlitic nodular cast iron rolls (I) | pearlite + cementite + small percentage fermite |
| Pearlitic nodular cast iron rolls (II) | pearlite + cementite + small percentage fermite |
| Pearlitic nodular cast iron rolls (III) | pearlite + cementite + small percentage fermite |
| bainitic nodular cast iron rolls (I) | bainite + cementite + SG |
| bainitic nodular cast iron rolls (II) | bainite + cementite + SG |
Application
| Designation of rolls | Application |
| CrMo semi-chilled SG cast iron rolls | Section mill, bar mill, roughing stands of wire-rod mill, work roll of rail mill |
| CrMo indefinite chilled SG cast iron rolls | Section mill, bar mill, intermediate and finishing stands of wire-rod mill |
| NiCrMo indefinite chilled SG cast iron rolls (I) | Section mill, bar mill, intermediate and finishing stands of wire-rod mill |
| NiCrMo indefinite chilled SG cast iron rolls (II) | Section mill, bar mill, intermediate and finishing stands of wire-rod mill |
| Pearlitic nodular cast iron rolls (I) | roughing stands of bar mill and wire-rod mill |
| Pearlitic nodular cast iron rolls (II) | roughing stands of bar mill and wire-rod mill |
| Pearlitic nodular cast iron rolls (III) | roughing stands of bar mill and wire-rod mill |
| bainitic nodular cast iron rolls (I) | roughing stands of bar mill and wire-rod mill |
| bainitic nodular cast iron rolls (II) | roughing stands of bar mill and wire-rod mill |
Depending on the excellent leadership, stable and professional employees, perfect management system and rapidly developing business, Camet Metallurgical Technologies Co., Ltd. Has developed into the one of the Chinese professional providers destined for offering cost-effective products and value added trading service in the field of metallurgical engineering. We are looking forward to establishing a win-win situation between you and Camet.
We have been supplied to more than 40 steel factories from USA, Mexico, Brazil, Argentina, Thailand, India, UK, Italy, Russia, Turkey, Kenya, Kuwait, such as Mittal, V&M, US steel, Corus Euro, etc. We have achieved excellent reputation from our customers.
Camet Metallurgical Technologies Co., Ltd. Has already certificated under ISO9001: 2000 quality control system since 2006, at the same time, recorded in DUNS global credit standing system (DUNS No.: 52794-3626). We will do our best to build an effective bridge between you and China under the condition of global trade integration.
