Silicon steel

23QG080 B23P080 is a non scored material

Wuhan Steel 23RK080 Baosteel B23R080 This is a scratch material

The corresponding English for the scratch material: Baosteel R, Wuhan Iron and Steel RK

Laser Scribed refers to laser engraved products

Oriented silicon steel: It is a silicon iron alloy that produces grain preferred orientation through deformation and recrystallization annealing, with a silicon content of about 3% and a very low carbon content. The product is cold-rolled sheet or strip, with nominal thicknesses of 0.18, 0.23.0.28, 0.30, and 0.35mm.

This soft magnetic material is mainly used to manufacture various transformers, fluorescent lamp ballasts, and stator iron cores of steam turbine generators. When oriented silicon steel is magnetized as a magnetic medium in an alternating current working environment, a part of the energy will be converted into heat loss during the electromagnetic conversion process, and this lost energy is called iron loss. As for silicon steel materials, methods to reduce the iron loss of oriented silicon steel include increasing silicon content, reducing plate thickness, and refining the magnetic domains of silicon steel.

Refining the magnetic domains of silicon steel is another effective method to reduce iron loss, and the surface etching technique of oriented silicon steel is a typical representative of this method. By carving parallel lines on the surface of oriented silicon steel, the structure on the indentation is deformed and misaligned, and residual stress is generated in non scored areas, thereby achieving the goal of refining magnetic domains and reducing iron loss. The surface etching technology of silicon steel has gone through three stages: mechanical etching, electrochemical etching, and laser etching.

The mechanical etching method is too inefficient and not suitable for industrial production, and it can cause damage to the surface coating of silicon steel, so it was quickly phased out.

Electrocorrosion scratches can also damage the silicon steel coating, so the coating needs to be reattached after the scratches. Therefore, this method has not been widely used.

With the emergence and development of laser technology, the method of using laser to scratch silicon steel quickly attracted people's attention. In the past 30 years, this method has been the main focus of research on magnetic domain improvement technology. And some advanced foreign companies have already applied laser engraving technology to actual production, such as Nippon Steel in Japan. Laser surface etching technology is an effective means to improve the magnetic domain distribution of oriented silicon steel, reduce iron loss, and thus improve the quality of oriented silicon steel.

Laser engraving on the surface of oriented silicon steel can promote the generation of small plastic deformation and high-density dislocations in the heated area by utilizing the characteristics of rapid local heating and cooling of laser, reduce the wall length of the main domain of oriented silicon steel, and achieve the goal of refining magnetic domains and reducing iron loss.