Nippon Steel Corporation

Yoshitaka Hiromae

Kazuo Nakamura

Osamu Tanaka

Tomoji Kumano

Shozaburo Nakashima

Yoshiaki Shimoyama

Hidejiro Asano

Toshiya Wada

Kunisuke Miyoshi

Hajime Nitto

Hirotada Katoh

Takashi Nagano

Process for producing a non-oriented electromagnetic steel sheet having

The present invention provides an annealing separator comprising from 0.05 to 2.0 parts by weight of antimony sulfate based on 100 parts by weight of magnesium oxide, and at least one chloride selected from the group consisting of Sb, Sr, Ti, and Zr chlorides in a chlorine amount of from 5 to 20% by weight based on 100% of the chloride and antimony sulfate, and occasionally comprises Ti oxide in an amount of from 0.5 to 10 parts. The annealing separator is applied on the decarburization annealed strip, and improves both the magnetic properties and properties of glass film, in the production of a grain-oriented electrical steel sheet.

Process for producing grain-oriented electrical steel sheet having both

A coating composition including inorganic compounds dispersed in an organic material capable upon exposure to UV rays or electron beams of producing an adherent insulating film of high dielectric properties on the surfaces of electro-sheets of ferrous material. The coated electro-sheets are annealed after the forming, for example, cutting or punching operation in order to remove thereby imparted stresses without impairing the dielectric properties.

Insulating coating compositions applied on electrical steel sheets

An annealing separator useful for producing a grain oriented silicon steel strip having an excellent magnetic property, comprises non-hydrating magnesium oxide which has been calcined at a temperature of 1300.degree. C. or more, preferably, from 1300.degree. to 2100.degree. C., and which is in the form of fine particles, 70% by weight of which have a size of 5 microns or less, and optionally, magnesium hydroxide in an amount of 1 to 100% based on the weight of the magnesium oxide and/or an aluminium compound in an amount of 0.05 to 10% based on the weight of the magnesium oxide.

Annealing separator for grain oriented silicon steel strips

An oil-coated metal sheet coated with a surface coating oil in an amount of from 0.05 - 1.0 g/B.B., said surface coating oil comprising diisodecyl phthalate and 0.1 -5% of one or more of a fatty acid having 14-18 carbon atoms.

Oil-coated metal sheet

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Kitakyushu, Japan

Yoshitaka Hiromae