Process for preparing unidirectional silicon steel sheet having

Details Process for preparing unidirectional silicon steel sheet having Process for preparing unidirectional silicon steel sheet having

1990-09-27

1991-09-17

Dean, R.

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

148112, 148113, 148307, H01F 1047

Patent

active

050492055

ABSTRACT:
The present invention relates to a process for preparing a unidirectional silicon steel sheet having a high magnetic flux density which comprises heating a silicon steel slab comprising by weight 0.025 to 0.075% of carbon, 2.5 to 4.5% of silicon, 0.015% or less of sulfur, 0.010 to 0.050% of acid-soluble aluminum, 0.0010 to 0.012% of nitrogen, 0.050 to 0.45% of manganese and 0.01 to 0.10% of tin and optionally 0.0005 to 0.0080% of boron with the balance being iron and unavoidable impurities, at 1200.degree. C. or below; hot-rolling the slab; subjecting the slab to rolling once or two or more times wherein intermediate annealing is provided, thereby attaining a percentage final rolling of 80% or more; subjecting the resultant steel sheet to decarburizing annealing in a wet hydrogen atmosphere; coating the steel sheet with an annealing separator; conducting finishing annealing for secondary recrystallization and purification of the steel; and subjecting the steel sheet to a nitriding treatment between after the ignition for decarburizing annealing and before the initiation of the secondary recrystallization in the finishing annealing.

REFERENCES:
patent: 4863532 (1989-09-01), Kuroki et al.
patent: 4938807 (1990-07-01), Takahashi et al.
J. E. May and D. Turnbull, (Trans. Met Soc. AIME 212(1958), pp. 769-781.

Affiliated with

Also associated with

Rating

Process for preparing unidirectional silicon steel sheet having does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for preparing unidirectional silicon steel sheet having , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for preparing unidirectional silicon steel sheet having will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1914673