According to the different production process, electrical steel is divided into hot rolled electrical steel and cold rolled electrical steel two, cold rolled sheet thickness uniform, good surface quality, high magnetic properties are better than hot rolled sheet, therefore, hot rolled sheet is facing the trend of being gradually eliminated by cold rolled sheet.

To this end, with the support of the "13th Five-Year Plan" national key research and development Plan and the major project of the State Grid Corporation, the project team has broken through the basic theory and core technology of medium frequency ultra-thin oriented electrical steel from the base metal to the finished product, and achieved independent research and development and engineering application of high-end materials.

The classification of electrical steel sheet is roughly hot-rolled electrical steel sheet, and the relevant departments have forced the elimination of electrical steel sheet in recent years.

The first contact with metal composite materials, there must be doubts, different metals, how they are "stuck" together? Common metal composite methods have the following several, together to understand.

There is a difference between steel and iron, the so-called steel, mainly composed of two elements, that is, iron and carbon, generally carbon and element iron to form a compound, called iron-carbon alloy.

Eddy current loss The alternating magnetic flux generates induced electromotive force in the iron core and causes a circulation called eddy current, which circulates in the plane perpendicular to the magnetic flux, and the power loss generated by eddy current;

Hot-rolled steel plates are produced at high temperatures, usually at temperatures above 1000 degrees Celsius; Cold-rolled steel is produced at room temperature. In terms of surface finish, because the hot rolled steel plate is produced at high temperature, the surface is rough and there are defects such as oxide skin.

The reason for the cold stamping cracking of the steel sheet is mainly that there is a non-equilibrium structure (granular bainite, block transformation products, etc.) in the metallographic structure, rather than the previously known ferrite + pearlite structure.