Invention Grant
- Patent Title: Steel sheet having high young's modulus, hot-dip galvanized steel sheet using the same, alloyed hot-dip galvanized steel sheet, steel pipe having high young's modulus, and methods for manufacturing the same
- Patent Title (中): 具有高年龄模量的钢板，使用该钢板的热浸镀锌钢板，合金化热浸镀锌钢板，具有较高模量的钢管及其制造方法
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Application No.: US13245295Application Date: 2011-09-26
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Publication No.: US08802241B2Publication Date: 2014-08-12
- Inventor: Natsuko Sugiura , Naoki Yoshinaga , Shunji Hiwatashi , Manabu Takahashi , Koji Hanya , Nobuyoshi Uno , Ryoichi Kanno , Akihiro Miyasaka , Takehide Senuma
- Applicant: Natsuko Sugiura , Naoki Yoshinaga , Shunji Hiwatashi , Manabu Takahashi , Koji Hanya , Nobuyoshi Uno , Ryoichi Kanno , Akihiro Miyasaka , Takehide Senuma
- Applicant Address: JP Tokyo
- Assignee: Nippon Steel & Sumitomo Metal Corporation
- Current Assignee: Nippon Steel & Sumitomo Metal Corporation
- Current Assignee Address: JP Tokyo
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: JP2004-218132 20040727; JP2004-330578 20041115; JP2005-019942 20050127; JP2005-207043 20050715
- Main IPC: C22C38/04
- IPC: C22C38/04 ; C22C38/12 ; C22C38/14 ; B32B15/18
Abstract:
In an embodiment of a steel sheet having high Young's modulus, the steel can include in terms of mass %, e.g., C: 0.0005 to 0.30%, Si: 2.3% or less, Mn: 2.7 to 5.0%, P: 0.15% or less, 0.015% or less, Mo: 0.15 to 1.5%, B: 0.0006 to 0.01%, and Al: 0.15% or less, with the remainder being Fe and unavoidable impurities. One or both of {110} pole density and {110} pole density in the ⅛ sheet thickness layer can be 10 or more, and a Young's modulus in a rolling direction can be more than 230 GPa. Other embodiments can include, e.g., Mn: 0.1 to 5.0%, N: 0.01% or less, and one or more of Mo: 0.005 to 1.5%, Nb: 0.005 to 0.20%, Ti: at least 48/14×N (mass %) and 0.2% or less, and B: 0.0001 to 0.01%, at a total content of 0.015 to 1.91 mass %.
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