Nippon Steel Corporation

Nippon Steel Sumitomo Metal Corporation

Akihito Kiyose

Takeshi Kubota

Masafumi Miyazaki

Wataru Yamada

Wataru Ohashi

Shingo Yamasaki

Takashi Sawai

Yousuke Kurosaki

Hideaki Yamamura

Yoshihiro Arita

Hajime Hasegawa

Jiro Kondo

Shinji Tokumaru

Yasuhiko Otani

Haruo Shimada

Tooru Matsumiya

Ryuji Watanabe

Atsushi Nogami

Toshiyuki Kajitani

Ken-ichiro Miyamoto

Mineo Niizuma

Kouichi Kudou

A continuous cast slab includes the following component: by mass %, C: 0.01&#x2dc;0.3%, Si: 0.05&#x2dc;0.5%, Mn: 0.4&#x2dc;2%, P: 0.03% or less, S: 0.03 or less, Al: 0.005&#x2dc;0.03%, Ni: 0.2&#x2dc;2%, O: 0.006% or less, and N: 0.006% or less; wherein the balance is composed of Fe and inevitable impurities; wherein a structure in steel in a region within at least 2 mm from a broad surface is composed of ferrite and pearlite and a equivalent circular diameter of ferrite grains in the region is equal to or shorter than 30 &#x3bc;m.

Continuous cast slab and producing method therefor

A steel product for welding includes the following component: by mass %, C: 0.3% or less, Si: 0.5% or less, Mn: 0.3&#x2dc;2%, P: 0.03% or less, S: 0.03% or less, Al: 0.3&#x2dc;5%, O: 0.003&#x2dc;0.01%, and N: 0.006% or less; wherein the balance is composed of Fe and inevitable impurities; wherein Al-containing oxides having a size of 0.005 to 0.05 &#x3bc;m are dispersed in steel at a ratio of 1&#xd7;10/mmor more.

Steel product for welding

A non-oriented electrical steel sheet is characterized in that the number density of inclusions with an equivalent volume diameter of less than 100 nm contained in the steel sheet is 1&#xd7;10[/mm] or less, and that the steel sheet contains, by mass %, C: up to 0.01%, Si: 0.1% to 7.0%. Al: 0.1% to 3.0%. Mn: 0.1% to 2.0%, REM: 0.0003% to 0.05%. Ti: up to 0.02%. S: up to 0.005%. and N: up to 0.005%. the balance Fe and inevitable impurities and the mass % of Al represented by [Al] and the mass % of Ti represented by [Ti] satisfy the equation log([Ti]&#xd7;[N])&#x2212;1.19&#xd7;log([Al]&#xd7;[N])+1.84&#x3e;0 . . . (1).

Non-oriented electrical steel sheet excellent in core loss and manufacturing method thereof

It is possible to produce high purity Si by heating solid SiO at a temperature of at least 1000&deg; C. and lower than 1730&deg; C., for a disproportionation reaction in which the SiO solid is decomposed to liquid or solid Si and solid SiO , and the produced Si is separated from the SiO and/or SiO. The SiO solid can be obtained by a process whereby a starting mixture of carbon C, silicon Si or ferrosilicon, or a combination thereof, with SiO is heated to generate SiO gas-containing gas, and the SiO-containing gas is cooled to produce SiO solid.

Production process and apparatus for high purity silicon

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Tokyo, Japan

Akihito Kiyose