The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 23, 2017
Filed:
Aug. 15, 2012
Toshio Murakami, Kobe, JP;
Elijah Kakiuchi, Kobe, JP;
Hideo Hata, Kobe, JP;
Naoki Mizuta, Kakogawa, JP;
Tatsuya Asai, Kakogawa, JP;
Toshio Murakami, Kobe, JP;
Elijah Kakiuchi, Kobe, JP;
Hideo Hata, Kobe, JP;
Naoki Mizuta, Kakogawa, JP;
Tatsuya Asai, Kakogawa, JP;
Kobe Steel, Ltd., Kobe-shi, JP;
Abstract
This high-strength steel plate has a component composition including, by mass %, C: 0.02-0.3%, Si: 1-3%, Mn: 1.8-3%, P: 0.1% or less, S: 0.01% or less, Al: 0.001-0.1%, N: 0.002-0.03%, the rest consisting of iron and impurities. Said steel plate has a microstructure including, in terms of area ratio relative to the entire microstructure, each of the following phases: bainitic ferrite: 50-85%; retained γ: 3% or greater; martensite+the aforementioned retained γ: 10-45%; and ferrite: 5-40%. The C concentration (CγR) in the aforementioned retained austenite is 0.3-1.2 mass %, part or all of the N in the aforementioned component composition is solid solution N, and the amount of said solid solution N is 30-100 ppm.