Method for producing economic low-temperature heating oriented electrical steel

Abstract

The invention discloses a method for producing economic low-temperature heating oriented electrical steel, and belongs to the technical field of oriented electrical steel. The method comprises that: a casting blank is heated at a temperature of between 1,200 and 1,300DEG C and then is hot rolled; and the hot-rolled sheet is subjected to acid cleaning and secondary cold rolling with interannealing, and is rolled to the thickness of a finished product, wherein the interannealing is that heat preservation is carried out for 3 to 6min at a temperature of between 800 and 900DEG C, and the atmosphere in a furnace is a gas mixture of wet H2 and N2, wherein the volume percentage of the H2 is between 1 and 30 percent. Partial decarbonization is carried out in the interannealing stage, and a decarburizing annealing or recovery annealing process after the secondary annealing is saved; and complete decarbonization is realized in a high-temperature annealing heating stage. The method has the advantages of adopting a simplified process for preparing the low-temperature oriented electrical steel and reducing production cost.

Description

A method of producing economical low-temperature heating grain-oriented electrical steel technical field The invention belongs to the technical field of oriented electrical steel, and in particular provides a method for producing economical low-temperature heating oriented electrical steel. Background technique Grain-oriented electrical steel is mainly used as the iron core material of transformers and other electrical appliances, which requires high magnetic flux density (magnetic flux density in a magnetic field of 800A / m, represented by B800) and high iron loss (at the maximum magnetic flux density of 1.7T The 50Hz AC iron loss, represented by P17) is low. The excellent magnetic energy source of grain-oriented electrical steel sheet is its Goss texture formed by secondary recrystallization during the final high-temperature annealing process. The traditional production method of grain-oriented electrical steel is to heat the slab to 1350-1400°C in a special high-temper...

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Problems solved by technology

However, this production method has many disadvantages such as high energy consumption, low production efficiency, high requirements for equipment, and serious edge cracking of hot-rolled sheets.

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