lron Core

23QG080   B23P080 is non-scribed material

WISCO 23RK080   Baosteel B23R080 is scribed material

Corresponding English for scribed material: Baosteel R, WISCO RK

Laser Scribed refers to laser-scribed products

Grain-oriented silicon steel: An iron-silicon alloy with grain orientation achieved through deformation and recrystallization annealing. It contains approximately 3% silicon and very low carbon content. Products are cold-rolled sheets or strips with nominal thicknesses of 0.18, 0.23, 0.28, 0.30, and 0.35 mm.

This soft magnetic material is primarily used in manufacturing transformers, fluorescent lamp ballasts, and stator cores for steam turbine generators. When oriented silicon steel serves as a magnetic medium and is magnetized under alternating current conditions, part of the energy is converted into heat loss during electromagnetic conversion. This lost energy is termed iron loss.

For silicon steel materials, methods to reduce iron losses in grain-oriented silicon steel include: increasing silicon content, reducing sheet thickness, and refining magnetic domains.

Refining magnetic domains is another effective approach to lowering iron losses, with surface etching technology representing a classic method.

This technique involves etching parallel lines on the silicon steel surface to induce deformation and misalignment in the etched regions, creating residual stresses in non-etched areas. This process refines magnetic domains and reduces iron losses.

This technique involves etching parallel lines onto the surface of oriented silicon steel. This process induces deformation and misalignment in the etched microstructure while generating residual stresses in the non-etched regions. This achieves the objectives of refining magnetic domains and reducing iron loss. Silicon steel surface etching technology has evolved through three stages: mechanical etching, electrochemical etching, and laser etching.

Mechanical etching proved inefficient for industrial production and damaged surface coatings, leading to its rapid obsolescence.

Electrochemical etching also compromised coatings, necessitating post-etching recoating—limiting its adoption.

The advent of laser technology quickly drew attention to laser-based etching methods. Over the past three decades, this method has remained central to magnetic domain improvement research. Advanced foreign enterprises, such as Japan's Nippon Steel Corporation, have already implemented laser etching technology in actual production.

Laser surface etching technology is an effective means to improve the magnetic domain distribution of grain-oriented silicon steel, reduce iron losses, and thereby enhance the quality of grain-oriented silicon steel.

Laser scribing on the surface of grain-oriented silicon steel utilizes the laser's characteristic of localized rapid heating and cooling. This induces micro-plastic deformation and high-density dislocations in the heated zone, reducing the length of the main domain walls in the silicon steel. This achieves the objectives of refining magnetic domains and lowering iron losses.