Cold Rolled Grain Oriented Electrical Steel

Grain-oriented electrical steel is a soft magnetic alloy of silicon and iron, produced through deformation and recrystallization annealing to achieve preferential grain orientation. It is typically supplied in cold-rolled sheet or strip form.

Characteristics of Grain-Oriented Silicon Steel:

1. High Grain Orientation: The internal grains are basically aligned neatly along the rolling direction, resulting in excellent magnetic properties in that direction.
2. High Magnetic Induction Intensity: Higher magnetic flux density can be achieved under the same magnetic field.
3. Extremely Low Iron Loss: Low hysteresis and eddy current losses, significantly reducing transformer no-load losses.
4. High Silicon Content: Silicon content is typically greater than 3% to improve resistivity and reduce iron loss.
5. Complex Manufacturing Process: Complex manufacturing process with high technical barriers, earning it the nickname "steel craftsmanship."

The fundamental difference between grain-oriented and non-oriented silicon steel lies in their grain distribution. Grain-oriented silicon steel has neatly aligned grains along the rolling direction and is specifically used in static electromagnetic conversion equipment such as transformers. Non-oriented silicon steel, on the other hand, has randomly distributed grains with uniform magnetic properties in all directions and is mainly used in rotating equipment such as motors.

Differences between Grain-Oriented Silicon Steel and Non-Oriented Silicon Steel

Advantages of Cold Rolled Grain Oriented Silicon Steel

There are several advantages to using cold rolled grain-oriented silicon steel in electrical equipment:
High efficiency: The low core loss and high magnetic permeability of this type of steel allow for efficient energy transfer, reducing waste and increasing overall efficiency.
Precision: The low coercivity and remanence of the steel allow for precise control over the magnetic field, enabling voltage regulation and current control.
Durability: Cold rolled grain-oriented silicon steel is highly resistant to corrosion, making it an ideal choice for use in harsh environments.

Applications of Grain-Oriented Silicon Steel

Grain-oriented silicon steel is a metallic material characterized by its high silicon content. Due to its unique physical properties and chemical composition, it has a variety of applications.

1. Power Transmission and Generation Equipment: Grain-oriented silicon steel is mainly used in the production of power transmission and generation equipment such as transformers, generators, motors, and frequency converters. Its low hysteresis and low iron loss characteristics make it an ideal material for manufacturing high-efficiency motors and generators.
2. Automotive and Aerospace Industries: Grain-oriented silicon steel is also widely used in the automotive and aerospace industries to manufacture components such as generators, electric motors, and transmissions. Its high permeability and low iron loss characteristics improve the efficiency of engines and transmissions, reducing energy consumption.
3. Home Appliances and Electronics: Grain-oriented silicon steel is widely used in home appliances and electronics, such as air conditioner compressors, refrigerator compressors, and washing machine motors. Its low energy consumption and high efficiency characteristics improve the performance of home appliances and reduce energy consumption.
4. Industrial Machinery and Equipment: Grain-oriented silicon steel is also used to manufacture various industrial machinery and equipment, such as wind turbines, water pumps, fans, and compressors. Its high permeability and low iron loss characteristics improve the efficiency of equipment and extend its service life.
5. Magnetic Field Sensors and Electromagnetic Devices: Grain-oriented silicon steel can also be used to manufacture magnetic field sensors and electromagnetic devices, such as magnetic sensors, electric door locks, and electromagnetic commutators. Its high permeability and low hysteresis characteristics improve the sensitivity and response speed of sensors and electromagnetic devices.

In summary, grain-oriented silicon steel is a functional material of great significance, with wide applications in various fields such as power transmission, automotive, aerospace, home appliances, electronics, and industrial machinery. Its unique physical properties and chemical composition make it a key material for manufacturing high-efficiency, energy-saving, and environmentally friendly products, playing a crucial role in improving equipment performance and reducing energy consumption.

The following are the Chinese, British, American and Japanese national standards for cold-rolled grain-oriented silicon steel:

Chinese standard:
GB/T2521-2008 "Full Process Cold-rolled Electrical Steel Part 1: Grain Non-Oriented Steel Strip (Sheet)", GB/T 2521.2-2016 "Full Process Cold-Rolled Electrical Steel Part 2: Grain Oriented Steel Strip ( piece)"

British Standard:
BS EN 10107:2005 "Grain-oriented electrical steel sheets and strips. Technical delivery conditions"

American standard:
ASTM A677 / A677M - 15 "Oriented Electrical Steel Sheet"

Japanese standard:
JIS C 2553:2016 "Oriented シリコン steel plate and steel band"
The standard stipulates terms and definitions, classification, symbols and grades, general requirements, technical requirements, inspection and testing, judgment and re-inspection rules, packaging, signs and quality certificates, and ordering content.

Grain-oriented silicon steel is the "heart material" of the power industry and is hailed as the crown jewel of the steel industry. Its grains are highly uniformly aligned along the rolling direction and possess excellent magnetic properties in a specific direction. It is an irreplaceable core material for manufacturing transformer cores, and its performance directly determines the transformer's energy efficiency and power transmission losses.

Parameters of grain-oriented silicon steel

Cold-rolled grain-oriented silicon steel, also known as cold-rolled transformer steel, is an important ferrosilicon alloy used in the transformer (iron core) manufacturing industry.
Dimensional specification of cold-rolled grain-oriented silicon steel:
Thickness: 0.23mm-0.35mm
Width: 20mm-1250mm