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Conventional Grain Oriented Silicon Steel refers to cold-rolled grain-oriented silicon steel. Ferrosilicon alloy cold-rolled oriented silicon steel, commonly known as cold-rolled transformer steel, is widely used in manufacturing transformers (iron cores). Its manufacturing process is complex and requires strict manufacturing technology.
Silicon steel is a soft magnetic material used in power transformers, motors and generators. It has a high silicon concentration, approximately 3.2 mass%, which increases the electrical resistivity of the iron and reduces eddy current losses. Grain-oriented silicon steel is characterized by a stable preferred crystal orientation in non-rotating applications such as transformers.
| Varieties | Common type | High induction type | Domain refined high induction type |
|---|---|---|---|
| Large motors | √ | √ | |
| Large transformers | √ | √ | √ |
| Medium and small transformers | √ | √ | √ |
| Distributing transformers | √ | √ | |
| Voltage regulator | √ | √ | √ |
| Reactor and magnetic amplifier | √ | √ | |
| IF transformer | √ | ||
| Mutual inductor | √ | √ | |
| TV transformer | √ | √ | |
| Radio transformer | √ | √ | |
| Radio broadcast transformer | √ |
| Type | Nominal thickness (mm) | Tensile strength L (N/mm2) | Yield strength L (N/mm2) | Elongation L (%) | Hardness HV1 | Number of bends | Lamination factor (%) |
|---|---|---|---|---|---|---|---|
| Common series | 0.27 | 335 | 305 | 12 | 190 | 25 | 97.5 |
| 0.30 | 345 | 310 | 12 | 190 | 20 | 98.0 | |
| High induction series | 0.23 | 351 | 316 | 10 | 197 | 22 | 96.5 |
| 0.27 | 350 | 325 | 12 | 195 | 20 | 97.5 | |
| 0.30 | 350 | 310 | 11 | 195 | 17 | 98.0 | |
| Domain refined high induction series | 0.23 | 353 | 326 | 12 | 195 | 19 | 96.5 |
| 0.27 | 355 | 330 | 10 | 200 | 18 | 97.5 |
The crystal orientation is the direction in which iron is most easily magnetized. Gaussian orientation is achieved in grain-oriented silicon steel through technology to minimize magnetic losses in power transformers. This product is an iron-silicon alloy that provides high magnetic permeability and minimal core losses for power transformers. Therefore, it is often used as the core of power transformers and is considered the most energy-efficient steel. Therefore, this product is also known as transformer steel around the world. These are the key factors that are likely to boost the global oriented silicon steel market in the coming years.
The conventional grain-oriented silicon steel is a soft magnetic material that is used as the core material in electrical transformers. It is characterized by a pronounced Goss texture, i.e a 110 <001> preferred crystal orientation.3 The grain structure of NGO silicon steel is disorderly, mixed with a large number of messy and different textures. At present, most of the core components of Permanent Magnet Synchronous Machine (PMSM) are laminated by NGO silicon steel sheets. Therefore, with the development trend of miniaturization and high density of electric motors system, the main requirements for iron-core silicon steel materials in the future will be high saturated flux density and low iron loss. However, due to the low silicon content of the NGO silicon steel itself (silicon content lower than 3.5%) and the limitations of metallographic structure, NGO silicon steel will become increasingly difficult to meet the design requirements of new motors.
Key characteristics of Conventional Grain Oriented Silicon Steel include:
Grain Orientation: The grains in CGO steel are carefully oriented during the manufacturing process to maximize magnetic properties along a specific direction. This allows for efficient energy transfer in transformers.
Low Core Loss: CGO steel exhibits low core loss, meaning it experiences minimal energy loss when subjected to alternating magnetic fields. This is crucial for the efficiency of transformers.
High Magnetic Permeability: It has a high magnetic permeability, allowing magnetic fields to easily pass through it. This is important for the performance of transformers and other electromagnetic devices.
Applications: CGO steel is widely used in the construction of power transformers, where efficiency and low core losses are critical factors.
Team style:
Processing of Silicon Steel, Customized to Precision According to Blueprint Specifications!
Please Note:
a. Testing conforms to GB/T3655-2008 standards.
b. Testing samples in both vertical and horizontal halves.
c. Magnetic property testing of high-efficiency non-oriented electrical steel AR series post stress relief annealing is exclusively applicable to samples in the state after 2 hours of stress relief annealing at 750°C.
d. P15/50 signifies the core loss per kilogram of sample at a maximum magnetic induction intensity of 1.5T and a frequency of 50Hz. P10/400 indicates the core loss per kilogram of sample at a maximum magnetic induction intensity of 1.0T and a frequency of 400Hz.
e. B5o represents the magnetic induction corresponding to a magnetic field strength of 5000A/m.
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