Method for forming surface {100} plane in iron and iron-based alloy, method for producing non-oriented electrical steel sheet using the same, and non-oriented electrical steel sheet produced using the same

摘要

An iron or iron-base alloy sheet having high proportion of {100} texture and a method of manufacturing the same. A method of forming grains having {100} plane parallel to the sheet surface is disclosed. A Fe or Fe-base alloy sheet is annealed at austenite () temperature while minimizing an effect of oxygen in the sheet or on surfaces of the sheet or a heat treatment atmosphere, and then the above sheet is subject to phase transformation to ferrite (). On surfaces of the resulting sheet, a high proportion of {100} texture develops. A method of manufacturing electrical steel sheet is disclosed. The grains with {100} texture on surfaces grow to have a grain size of at least half the thickness of the sheet by a transformation. By adopting the above disclosed methods, an iron or iron-base alloy sheet with excellent texture can be simply manufactured within short time.