Coating material, oriented silicon steel sheet having coating formed from coating material, and manufacturing method therefor

Abstract

The present invention relates to a coating material for surface coating of oriented silicon steel. The coating material comprises: phosphate; colloidal silica; and at least one vanadate selected from vandates of Ce, Mn, Co, Cu, or Fe. The coating material does not comprise Cr. The present invention further relates to oriented silicon steel having a surface coating formed from the coating material. The present invention further relates to a manufacturing method for oriented silicon steel having a surface coating formed from the coating material. The coating material of the present invention does not comprise chromium. The coating formed from the coating material can still provide sufficient moisture absorption resistance and apply sufficient tension to the oriented silicon steel sheet while protecting the environment, so that iron loss and magnetostriction of the oriented silicon steel are further reduced, and a high-quality transformer iron core material is obtained.

Dependencies are inferred from the claim text.