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US 3,969,162 AGranted
Method of producing silicon steel strip
OwnerRobert H. Henkeinventor
Life of this patent
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Abstract
A method of producing silicon steel strip from slabs is provided which includes the steps of reducing the slabs in a planetary mill to a thickness of 0.060 to 0.10 inch at a temperature above that at which MnS will precipitate, cooling to between 300.degree.F to 1500.degree.F and reducing the strip at that temperature to a thickness of 0.020 to 0.030.
Claims3
The method of producing oriented silicon steel strip of improved physical properties having a silicon content in the range 2.5 to 4.0 percent comprising the steps of:
- a. bringing hot rolled strip having a thickness in the range 0.060 to 0.150 inch following normalizing to a temperature below 1500.degree.F. and above 600.degree.F.,
- b. reducing the strip in thickness to final finish thickness prior to recrystallize normalizing to about 0.020 to 0.030 inch while in said temperature range 600.degree.F. to 1500.degree.F.,
- c. normalizing at about 1725.degree.F. to recrystallize grain strength, and
- d. cold rolling to a selected thickness without further heating.
1 more element
Dependencies are inferred from the claim text.