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1. 发明公开

EP1826287A3 High strength steel sheet having excellent formability 有权
标题翻译：高强度钢板具有优异的加工性
公开(公告)号：EP1826287A3
公开(公告)日：2010-12-01
申请号：EP07250742.9
申请日：2007-02-22
申请人： KABUSHIKI KAISHA KOBE SEIKO SHO
发明人： Futamura, Yuichi , Yamamoto, Katsuhiro , Miura, Masaaki
IPC分类号： C22C38/02 , C22C38/06 , C22C38/22 , C22C38/34 , C22C38/38 , C23C8/46 , B32B15/01 , C22C38/04 , C22C38/12 , C22C38/18 , C21D8/02
CPC分类号： C22C38/38 , B32B15/013 , C21D6/008 , C21D8/0226 , C21D8/0236 , C21D2211/005 , C21D2211/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/18 , C22C38/22 , C22C38/34 , Y10T428/12799
摘要： A high strength steel sheet contains, in percent by mass, 0.03 to 0.2% of C, 0.5 to 2.5% of Si, 1 to 3.0% of Mn, 0.01 to 0.5% of Cr, 0.01 to 0.5% of Mo, 0.02 to 0.15% of Al, 0.15% or less of Ti, 0.15% or less of No, and 0.15% or less of V; wherein the remainder includes Fe and inevitable impurities, and the content of Si satisfies the following formula (1), α - 4.1 ≤ Si ≤ α - 2.4
provided, α = 6.9 × C + Mn / 6 + Cr / 5 + Mo / 4 + Ti / 15 + Nb / 17 + V / 14 1 / 2
is given, wherein [] shows the quantity (mass percent) of each element contained in the steel sheet. The high strength steel sheet is improved in formability (particularly, elongation), and excellent in balance between strength and elongation.

2. 发明授权

EP1826287B1 High strength steel sheet having excellent formability 有权
标题翻译：高强度钢板具有优异的加工性
公开(公告)号：EP1826287B1
公开(公告)日：2012-10-31
申请号：EP07250742.9
申请日：2007-02-22
申请人： KABUSHIKI KAISHA KOBE SEIKO SHO
发明人： Futamura, Yuichi , Yamamoto, Katsuhiro , Miura, Masaaki
IPC分类号： C22C38/02 , C22C38/06 , C22C38/22 , C22C38/34 , C22C38/38 , C23C8/46 , B32B15/01 , C22C38/04 , C22C38/12 , C22C38/18 , C21D8/02 , C21D6/00
CPC分类号： C22C38/38 , B32B15/013 , C21D6/008 , C21D8/0226 , C21D8/0236 , C21D2211/005 , C21D2211/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/18 , C22C38/22 , C22C38/34 , Y10T428/12799

3. 发明公开

EP2236638A1 High-strength cold-rolled steel sheet excellent in workability and shape freezing property 失效
标题翻译： Hochfestes kaltgepresstes Stahlblech mit ausgezeichneterBearbeitungsfähigkeitund Formgefriereigenschaften
公开(公告)号：EP2236638A1
公开(公告)日：2010-10-06
申请号：EP10158525.5
申请日：2010-03-30
申请人： Kabushiki Kaisha Kobe Seiko Sho
发明人： Tsunezawa, Michitaka , Futamura, Yuichi , Miura, Masaaki
IPC分类号： C22C38/00
CPC分类号： C22C38/00 , Y10T428/12799 , Y10T428/12972
摘要： A high-strength cold-rolled steel sheet according to the present invention: satisfies the requirement of a prescribed chemical composition; has a structure comprising a mother phase structure of ferrite and a second phase structure of retained austenite and martensite (the martensite may not be included); and satisfies the following expressions (1) and (2) when the volume fraction of the ferrite in the whole structure is represented by Vf (%), the volume fraction of the retained austenite in the whole structure is represented by Vy (%), the carbon content in the retained austenite is represented by Cγ (mass %), the shortest distance between the second phase structures is represented by dis (µm), and the average grain size of the second phase structures is represented by dia (µm), Vf × Vγ × Cγ × dis / dia ≥ 300 dis ≥ 1.0 μm
By such a configuration, the improvement of TS-EL balance and the reduction of a springback value are attained in a high strength region of about 550 to 900 MPa class and excellent workability and shape freezing property are obtained.
摘要翻译：本发明的高强度冷轧钢板满足规定的化学成分的要求，具有包含铁素体的母相结构和残留奥氏体和马氏体的第二相结构（可以不包括马氏体）的结构; 满足下列表达式（1）和（2）当整个结构中铁素体的体积分数用Vf（％）表示时，整个结构中的残留奥氏体的体积分数由Vy（％）表示，残留奥氏体中的碳含量以C 3（质量％）表示，第二相结构之间的最短距离由dis（μm）表示，第二相结构的平均粒径由dia（μm）表示， Vf×V 3×C 3×dis / dia‰¥300‰¥1.0¼m通过这样的结构，在约550〜900MPa级的高强度区域中获得TS-EL平衡的改善和回弹值的降低得到优异的加工性和形状冷冻性。

4. 发明授权

EP2182080B1 High yield ratio and high-strength hot-dip galvanized steel sheet excellent in workability and production method thereof 有权
标题翻译：高屈服比的高强度热镀锌钢板及其加工性能及其生产方法
公开(公告)号：EP2182080B1
公开(公告)日：2017-11-29
申请号：EP09013313.3
申请日：2009-10-21
申请人： Kabushiki Kaisha Kobe Seiko Sho
发明人： Futamura, Yuichi , Miura, Masaaki
IPC分类号： C21D6/00 , C21D8/04 , C21D9/46 , C22C38/02 , C22C38/04 , C23C2/06 , C22C38/08 , C22C38/16 , C22C38/22
CPC分类号： C22C38/04 , C21D6/001 , C21D6/005 , C21D6/008 , C21D8/0405 , C21D8/0447 , C21D9/46 , C21D2211/005 , C21D2211/008 , C22C38/02 , C22C38/08 , C22C38/16 , C22C38/22 , C23C2/02 , C23C2/28
摘要： A high-strength hot-dip galvanized steel sheet excellent in workability according to the present invention: contains C, Si, Mn and other elements; has a dual phase structure containing ferrite and martensite as the metallographic structure; and, in the ferrite structure, satisfies the expression 0.2 ‰¤ (L b /L a ) ‰¤ 1.5 when the length per unit area of the grain boundaries of crystal grains the crystal orientation differences of which are 10 degrees or more is defined as L a and the length per unit area of the grain boundaries of crystal grains the crystal orientation differences of which are less than 10 degrees is defined as L b , and further satisfies the requirements that the average value of D is 25 µm or less and the area ratio of crystal grains satisfying the expression D ‰¤ 30 µm in the ferrite grains surrounded by the grain boundaries of crystal grains the crystal orientation differences of which are 10 degrees or more is 50% or more when the circle equivalent diameter of each of ferrite grains surrounded by the grain boundaries of crystal grains the crystal orientation differences of which are 10 degrees or more is defined as D; and has a tensile strength of 980 MPa or more.

5. 发明授权

EP2236638B1 High-strength cold-rolled steel sheet excellent in workability and shape freezing property 失效
标题翻译：高强度冷压钢板具有优良的加工性和形状冻结性
公开(公告)号：EP2236638B1
公开(公告)日：2016-12-14
申请号：EP10158525.5
申请日：2010-03-30
申请人： Kabushiki Kaisha Kobe Seiko Sho
发明人： Tsunezawa, Michitaka , Futamura, Yuichi , Miura, Masaaki
IPC分类号： C22C38/00
CPC分类号： C22C38/00 , Y10T428/12799 , Y10T428/12972

6. 发明公开

EP2182080A1 High yield ratio and high-strength hot-dip galvanized steel sheet excellent in workability and production method thereof 有权
标题翻译：高强度热镀锌钢板，具有高屈服比和优异的可加工性及其制造方法
公开(公告)号：EP2182080A1
公开(公告)日：2010-05-05
申请号：EP09013313.3
申请日：2009-10-21
申请人： Kabushiki Kaisha Kobe Seiko Sho
发明人： Futamura, Yuichi , Miura, Masaaki
IPC分类号： C21D6/00 , C21D8/04 , C21D9/46 , C22C38/02 , C22C38/04 , C23C2/06 , C22C38/08 , C22C38/16 , C22C38/22
CPC分类号： C22C38/04 , C21D6/001 , C21D6/005 , C21D6/008 , C21D8/0405 , C21D8/0447 , C21D9/46 , C21D2211/005 , C21D2211/008 , C22C38/02 , C22C38/08 , C22C38/16 , C22C38/22 , C23C2/02 , C23C2/28
摘要： A high-strength hot-dip galvanized steel sheet excellent in workability according to the present invention: contains C, Si, Mn and other elements; has a dual phase structure containing ferrite and martensite as the metallographic structure; and, in the ferrite structure, satisfies the expression 0.2 ≤ (L b /L a ) ≤ 1.5 when the length per unit area of the grain boundaries of crystal grains the crystal orientation differences of which are 10 degrees or more is defined as L a and the length per unit area of the grain boundaries of crystal grains the crystal orientation differences of which are less than 10 degrees is defined as L b , and further satisfies the requirements that the average value of D is 25 µm or less and the area ratio of crystal grains satisfying the expression D ≤ 30 µm in the ferrite grains surrounded by the grain boundaries of crystal grains the crystal orientation differences of which are 10 degrees or more is 50% or more when the circle equivalent diameter of each of ferrite grains surrounded by the grain boundaries of crystal grains the crystal orientation differences of which are 10 degrees or more is defined as D; and has a tensile strength of 980 MPa or more.
摘要翻译：一种高强度热浸镀锌钢板的可加工性优异gemäß了本发明：含有C，Si，Mn和其他元素; 具有二相组织含铁素体和马氏体为金相结构; 并且，在铁素体组织，SATIS外资企业表达0.2‰¤（L B /升的）‰¤1.5当每晶粒的晶界的每单位面积的长度的晶体取向差为10°以上的定义为升的和晶粒的晶体取向差为被定义为L b减少大于10度，并且进一步SATIS外资企业的晶界的每单位长度的面积的要求没有D的平均值为25微米或更小和满足表达式ð‰¤在通过晶粒的晶界包围的铁素体晶粒30微米的晶体取向差为10度或更多的是50％或更多的晶粒的面积比当每个铁素体的当量圆直径晶粒由晶粒的晶体取向差为10°以上的定义为D的晶界包围; 并且具有980MPa以上的拉伸强度。

7. 发明公开

EP1826287A2 High strength steel sheet having excellent formability 有权
标题翻译： Hochfestes Stahlblech mit ausgezeichneter Formbarkeit
公开(公告)号：EP1826287A2
公开(公告)日：2007-08-29
申请号：EP07250742.9
申请日：2007-02-22
申请人： KABUSHIKI KAISHA KOBE SEIKO SHO
发明人： Futamura, Yuichi , Yamamoto, Katsuhiro , Miura, Masaaki
IPC分类号： C22C38/02 , C22C38/06 , C22C38/22 , C22C38/34 , C22C38/38 , C23C8/46
CPC分类号： C22C38/38 , B32B15/013 , C21D6/008 , C21D8/0226 , C21D8/0236 , C21D2211/005 , C21D2211/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/18 , C22C38/22 , C22C38/34 , Y10T428/12799
摘要： A high strength steel sheet contains, in percent by mass, 0.03 to 0.2% of C, 0.5 to 2.5% of Si, 1 to 3.0% of Mn, 0.01 to 0.5% of Cr, 0.01 to 0.5% of Mo, 0.02 to 0.15% of Al, 0.15% or less of Ti, 0.15% or less of No, and 0.15% or less of V; wherein the remainder includes Fe and inevitable impurities, and the content of Si satisfies the following formula (1),

provided,

is given, wherein [] shows the quantity (mass percent) of each element contained in the steel sheet. The high strength steel sheet is improved in formability (particularly, elongation), and excellent in balance between strength and elongation.
摘要翻译：高强度钢板以质量计含有0.03〜0.2％的C，0.5〜2.5％的Si，1〜3.0％的Mn，0.01〜0.5％的Cr，0.01〜0.5％的Mo，0.02〜0.15 ，Al：0.15％以下，No：0.15％以下，V：0.15％以下，其余为Fe和不可避免的杂质，Si含量满足下列公式（1）：±4.1‰¤Si‰±2.4提供，±6.9×C + Mn / 6 + Cr / 5 + Mo / 4 + Ti / 15 + Nb / 17 + V / 14 1/2，其中[]表示钢板中所含的各元素的量（质量％）。高强度钢板的成型性（特别是伸长率）提高，强度和伸长率之间的平衡优异。

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