27QG095 Grain-Oriented Steel
Description
Technical Parameters
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Grain-oriented silicon steel Description
Grain-oriented silicon steel, also known as cold-rolled transformer steel, is an important silicon-iron alloy primarily used in the manufacturing of transformer cores. Characterized by its complex production process and stringent manufacturing techniques, it is mainly categorized into conventional grain-oriented silicon steel (CGO) and high-permeability grain-oriented silicon steel (HiB).
cold-rolled transformer steel video
27QG095 Grain-oriented Steel parameter
| Thickness (mm) |
Trademark | Theoretical density (Kg/dm2) | Iron loss(W/Kg ) | Magnetic induction (T) |
| 0.23 | 23Q110 | 7.65 | 1.10 | 1.81 |
| 0.27 | 27Q120 | 1.20 | 1.82 | |
| 27Q130 | 1.30 | 1.81 | ||
| 0.30 | 30Q120 | 1.30 | 1.82 | |
| 0.23 | 23QG090 | 0.90 | 1.88 | |
| 23QG095 | 0.95 | |||
| 23QG100 | 1.00 | |||
| 0.27 | 27QG095 | 0.95 | 1.89 | |
| 27QG100 | 1.00 | |||
| 27QG120 | 1.20 | |||
| 0.30 | 30QG105 | 1.05 | ||
| 30QG120 | 1.20 |
The production process of cold-rolled grain-oriented silicon steel
1.HiB steel with MnS inhibitor
hot-rolled coil normalization and pickling (CP) → cold rolling (CM/ZR) → coil welding and rewinding (CW) → decarburization annealing with isolation coating (CA) → high-temperature recrystallization annealing (ROF/CB) → thermal flattening and insulation coating (CT) → laser grooving (GS) → edge trimming and slitting (CS) → packaging and storage (PA).
This comprehensive process ensures the development of optimal magnetic properties through controlled grain orientation, with each stage carefully designed to achieve the characteristic Goss texture ({110}<001>) that gives HiB steel its superior performance in transformer core applications. The MnS inclusion control throughout the process plays a critical role in facilitating proper secondary recrystallization during the high-temperature annealing phase.
2.Conventional grain-oriented steel (CGO) with MnS inhibitor
hot-rolled coil pickling (CP) → primary cold rolling (CM/ZR/TCM) → coil welding and rewinding (CW) → intermediate decarburization annealing (CA) → secondary cold rolling (ZR) → (optional rewinding) → final decarburization annealing with MgO coating (CA) → high-temperature recrystallization annealing (ROF/CB) → thermal flattening and insulation coating (CT) → edge trimming and slitting (CS) → final packaging and storage (PA).
This optimized process route, particularly featuring the two-stage cold rolling with intermediate annealing and controlled MnS precipitation, enables the development of {110}<001> Goss texture while maintaining cost-effectiveness compared to HiB steel production. The MgO coating application before final high-temperature annealing serves dual purposes of providing isolation and promoting secondary recrystallization during the ROF/CB process.
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