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Jfe Steel Corporation patents (2014 archive)


Recent patent applications related to Jfe Steel Corporation. Jfe Steel Corporation is listed as an Agent/Assignee. Note: Jfe Steel Corporation may have other listings under different names/spellings. We're not affiliated with Jfe Steel Corporation, we're just tracking patents.

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12/25/14 / #20140377584

High-strength hot-dipped galvanized steel sheet having excellent formability and impact resistance, and method for producing same

A galvanized steel sheet has a composition containing, by mass %, c: 0.05% or more and 0.5% or less, si: 0.01% or more and 2.5% or less, mn: 0.5% or more and 3.5% or less, p: 0.003% or more and 0.100% or less, s: 0.02% or less, al: 0.010% or more and 0.5% or less, b: 0.0002% or more and 0.005% or less, ti: 0.05% or less, a relationship of ti>4n being satisfied, and the balance comprising fe and inevitable impurities, and a microstructure containing 60% or more and 95% or less of tempered martensite in terms of area ratio and 5% or more and 20% or less of retained austenite in terms of area ratio, or further containing 10% or less (including 0%) of ferrite in terms of area ratio and/or 10% or less (including 0%) of martensite in terms of area ratio, the tempered martensite having an average grain diameter of 5 μm or less.. . ... Jfe Steel Corporation

12/25/14 / #20140377573

Directional electromagnetic steel sheet with coating, and method for producing same

A directional electromagnetic steel sheet with a coating includes a directional electromagnetic steel sheet; and a coating that is formed on the surface of the directional electromagnetic steel sheet and contains elements p, si, cr and o as well as at least one element that is selected from the group consisting of mg, al, ni, co, mn, zn, fe, ca and ba, with 5% by mass or more thereof being composed of a crystalline phase of a phosphate salt.. . ... Jfe Steel Corporation

12/18/14 / #20140366994

Steel sheet with excellent aging resistance property and method for producing the same

A steel sheet and a method for producing the same are disclosed. The steel sheet has a composition containing 0.015% to 0.05% c, less than 0.10% si, 0.1% to 2.0% mn, 0.20% or less p, 0.1% or less s, 0.01% to 0.10% al, 0.005% or less n, and 0.06% to 0.5% ti in percent by mass, c and ti satisfying the inequality ti*/c≧4, where ti* (mass percent)=ti-3.4n and ti, c, and n represent the content (mass percent) of each element. ... Jfe Steel Corporation








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