公开(公告)号：US20140241933A1

公开(公告)日：2014-08-28

申请号：US14130552

申请日：2012-06-27

申请人： Jun Haga ,  Takuya Nishio ,  Masayuki Wakita ,  Yasuaki Tanaka ,  Norio Imai ,  Toshiro Tomida

发明人： Jun Haga ,  Takuya Nishio ,  Masayuki Wakita ,  Yasuaki Tanaka ,  Norio Imai ,  Toshiro Tomida

IPC分类号： C22C38/38 ,  C22C38/14 ,  C22C38/00 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/26 ,  C22C38/12

CPC分类号： C22C38/38 ,  C21D1/673 ,  C21D9/48 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/26

摘要： A high-strength cold-rolled steel sheet excellent in ductility, work hardenability, and stretch flangeability, and having tensile strength of 780 MPa or more includes: a chemical composition containing, in mass percent, C: more than 0.020% to less than 0.30%, Si: more than 0.10% to 3.00% or less, Mn: more than 1.00% to 3.50% or less; and metallurgical structure whose main phase is a low-temperature transformation product, and whose secondary phase contains retained austenite. The retained austenite has a volume fraction relative to overall structure of more than 4.0% to less than 25.0% and an average grain size of less than 0.80 μm, and of the retained austenite, the number density of retained austenite grains whose grain size is 1.2 μm or more is 3.0×10−2 grains/μm2 or less.

摘要翻译： 具有优异的延展性，工作淬透性和拉伸凸缘性的拉伸强度为780MPa以上的高强度冷轧钢板包括：以质量％计含有C：大于0.020％至小于0.30的化学组成 ％，Si：大于0.10％〜3.00％以下，Mn：大于1.00％〜3.50％以下; 主要相为低温相变产物，二相为残余奥氏体的冶金结构。 残余奥氏体相对于总体结构的体积分数大于4.0％至小于25.0％，平均粒径小于0.80μm，残余奥氏体的晶粒尺寸为1.2的残余奥氏体晶粒的数量密度 μm以上为3.0×10 -2个/μm2以下。

公开(公告)号：US10774412B2

公开(公告)日：2020-09-15

申请号：US14130530

申请日：2012-06-29

申请人： Norio Imai ,  Masayuki Wakita ,  Takuya Nishio ,  Jun Haga ,  Kengo Hata ,  Yasuaki Tanaka ,  Mitsuru Yoshida ,  Hiroshi Takebayashi ,  Suguhiro Fukushima ,  Toshiro Tomida

发明人： Norio Imai ,  Masayuki Wakita ,  Takuya Nishio ,  Jun Haga ,  Kengo Hata ,  Yasuaki Tanaka ,  Mitsuru Yoshida ,  Hiroshi Takebayashi ,  Suguhiro Fukushima ,  Toshiro Tomida

IPC分类号： C21D8/02 ,  C22C38/12 ,  C22C38/02 ,  C22C38/06 ,  C22C38/04 ,  C22C38/00 ,  C21D9/46 ,  C23C2/02 ,  C23C2/04

摘要： A hot-dip galvanized cold-rolled steel sheet has a tensile strength of 750 MPa or higher, a composition consisting, in mass percent, C: more than 0.10% and less than 0.25%, Si: more than 0.50% and less than 2.0%, Mn: more than 1.50% and 3.0% or less, and optionally containing one or more types of Ti, Nb, V, Cr, Mo, B, Ca, Mg, REM, and Bi, P: less than 0.050%, S: 0.010% or less, sol. Al: 0.50% or less, and N: 0.010% or less, and a main phase as a low-temperature transformation product and a second phase as retained austenite. The retained austenite volume fraction is more than 4.0% and less than 25.0% of the whole structure, and has an average grain size of less than 0.80 μm. A number density of retained austenite grains having a grain size of 1.2 μm or more is 3.0×10−2/μm2 or less.

公开(公告)号：US20140238557A1

公开(公告)日：2014-08-28

申请号：US14130568

申请日：2012-07-02

申请人： Jun Haga ,  Takuya Nishio ,  Masayuki Wakita ,  Yasuaki Tanaka ,  Norio Imai ,  Toshiro Tomida ,  Mitsuru Yoshida ,  Kengo Hata

发明人： Jun Haga ,  Takuya Nishio ,  Masayuki Wakita ,  Yasuaki Tanaka ,  Norio Imai ,  Toshiro Tomida ,  Mitsuru Yoshida ,  Kengo Hata

IPC分类号： C21D8/02

CPC分类号： C21D8/0236 ,  C21D8/0247 ,  C21D8/0273 ,  C21D8/1261 ,  C21D2211/003 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12

摘要： A method for producing a high-tensile cold-rolled steel sheet includes subjecting a slab having a composition containing C: more than 0.020% and less than 0.30%, Si: more than 0.10% and 3.00% or less, and Mn: more than 1.00% and 3.50% or less to hot rolling wherein the roll draft of the final one pass is higher than 15%, and rolling is finished in the temperature region of Ar3 point or higher, optionally annealing wherein the hot-rolled steel sheet is heated to 300° C. or higher after being cooled to 780° C. or lower, coiling higher than 400° C. or lower than 400° C., cold rolling the hot-rolled steel sheet or the annealed steel sheet, and annealing wherein the cold-rolled steel sheet is soaked in the temperature region of (Ac3 point−40° C.) or higher, cooling to 500° C. or lower and 300° C. or higher, and holding in that temperature region for 30 seconds or longer.

摘要翻译： 一种高张力冷轧钢板的制造方法，其特征在于，将含有C：大于0.020％且小于0.30％的组成的钢坯，Si：0.10％以上且3.00％以下，Mn：超过 1.00％和3.50％以下，其中最终一次的轧制通过率高于15％，并且在Ar3点以上的温度区域中进行轧制，任选地进行热轧钢板的退火 冷却至780℃以下后，将其回收至300℃以上，卷取高于400℃或低于400℃，对该热轧钢板或退火钢板进行冷轧，退火， 将冷轧钢板浸渍在（Ac3-40℃）以上的温度区域，冷却至500℃以上且300℃以上，并在该温度区域保持30秒钟 或更长。

公开(公告)号：US20140212686A1

公开(公告)日：2014-07-31

申请号：US14130530

申请日：2012-06-29

申请人： Norio Imai ,  Masayuki Wakita ,  Takuya Nishio ,  Jun Haga ,  Kengo Hata ,  Yasuaki Tanaka ,  Mitsuru Yoshida ,  Hiroshi Takebayashi ,  Suguhiro Fukushima ,  Toshiro Tomida

发明人： Norio Imai ,  Masayuki Wakita ,  Takuya Nishio ,  Jun Haga ,  Kengo Hata ,  Yasuaki Tanaka ,  Mitsuru Yoshida ,  Hiroshi Takebayashi ,  Suguhiro Fukushima ,  Toshiro Tomida

IPC分类号： C23C2/02 ,  C21D8/02

摘要： A hot-dip galvanized cold-rolled steel sheet has a tensile strength of 750 MPa or higher, a composition consisting, in mass percent, of C: more than 0.10% and less than 0.25%, Si: more than 0.50% and less than 2.0%, Mn: more than 1.50% and 3.0% or less, and optionally containing one or more types of Ti, Nb, V, Cr, Mo, B, Ca, Mg, REM, and Bi, P: less than 0.050%, S: 0.010% or less, sol. Al: 0.50% or less, and N: 0.010% or less, and a main phase as a low-temperature transformation product and a second phase as retained austenite. The retained austenite volume fraction is more than 4.0% and less than 25.0% of the whole structure, and has an average grain size of less than 0.80 □m. A number density of retained austenite grains having a grain size of 1.2 □m or more is 3.0□10−2/□m2 or less.

摘要翻译： 热浸镀锌冷轧钢板的拉伸强度为750MPa以上，以质量％计，C：0.10以上且小于0.25％的Si：超过0.50％以下 2.0％，Mn：大于1.50％和3.0％以下，并且任选地含有一种或多种Ti，Nb，V，Cr，Mo，B，Ca，Mg，REM和Bi，P：小于0.050％ ，S：0.010％以下，溶胶。 Al：0.50％以下，N：0.010％以下，作为低温相变产物的主相和作为残留奥氏体的第二相。 残留奥氏体体积分数大于整个结构的4.0％以上且小于25.0％，平均粒径小于0.80μm。 晶粒尺寸为1.2μm以上的残留奥氏体晶粒的数密度为3.0×10 -2 /□m 2以下。

公开(公告)号：US10174392B2

公开(公告)日：2019-01-08

申请号：US14130568

申请日：2012-07-02

申请人： Jun Haga ,  Takuya Nishio ,  Masayuki Wakita ,  Yasuaki Tanaka ,  Norio Imai ,  Toshiro Tomida ,  Mitsuru Yoshida ,  Kengo Hata

发明人： Jun Haga ,  Takuya Nishio ,  Masayuki Wakita ,  Yasuaki Tanaka ,  Norio Imai ,  Toshiro Tomida ,  Mitsuru Yoshida ,  Kengo Hata

IPC分类号： C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C21D8/12

摘要： A method for producing a high-tensile cold-rolled steel sheet includes subjecting a slab having a composition containing C: more than 0.020% and less than 0.30%, Si: more than 0.10% and 3.00% or less, and Mn: more than 1.00% and 3.50% or less to hot rolling wherein the roll draft of the final one pass is higher than 15%, and rolling is finished in the temperature region of Ar3 point or higher, optionally annealing wherein the hot-rolled steel sheet is heated to 300° C. or higher after being cooled to 780° C. or lower, coiling higher than 400° C. or lower than 400° C., cold rolling the hot-rolled steel sheet or the annealed steel sheet, and annealing wherein the cold-rolled steel sheet is soaked in the temperature region of (Ac3 point−40° C.) or higher, cooling to 500° C. or lower and 300° C. or higher, and holding in that temperature region for 30 seconds or longer.

公开(公告)号：US09523139B2

公开(公告)日：2016-12-20

申请号：US14130552

申请日：2012-06-27

申请人： Jun Haga ,  Takuya Nishio ,  Masayuki Wakita ,  Yasuaki Tanaka ,  Norio Imai ,  Toshiro Tomida

发明人： Jun Haga ,  Takuya Nishio ,  Masayuki Wakita ,  Yasuaki Tanaka ,  Norio Imai ,  Toshiro Tomida

IPC分类号： C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/26 ,  C22C38/38 ,  C22C38/00 ,  C21D9/48 ,  C21D1/673

CPC分类号： C22C38/38 ,  C21D1/673 ,  C21D9/48 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/26

摘要： A high-strength cold-rolled steel sheet excellent in ductility, work hardenability, and stretch flangeability, and having tensile strength of 780 MPa or more includes: a chemical composition containing, in mass percent, C: more than 0.020% to less than 0.30%, Si: more than 0.10% to 3.00% or less, Mn: more than 1.00% to 3.50% or less; and metallurgical structure whose main phase is a low-temperature transformation product, and whose secondary phase contains retained austenite. The retained austenite has a volume fraction relative to overall structure of more than 4.0% to less than 25.0% and an average grain size of less than 0.80 μm, and of the retained austenite, the number density of retained austenite grains whose grain size is 1.2 μm or more is 3.0×10−2 grains/μm2 or less.

摘要翻译： 具有优异的延展性，工作淬透性和拉伸凸缘性的拉伸强度为780MPa以上的高强度冷轧钢板包括：以质量％计含有C：大于0.020％至小于0.30的化学组成 ％，Si：大于0.10％〜3.00％以下，Mn：大于1.00％〜3.50％以下; 主要相为低温相变产物，二相为残余奥氏体的冶金结构。 残余奥氏体相对于总体结构的体积分数大于4.0％至小于25.0％，平均粒径小于0.80μm，残余奥氏体的晶粒尺寸为1.2的残余奥氏体晶粒的数量密度 μm以上为3.0×10 -2个/μm2以下。

公开(公告)号：US09340860B2

公开(公告)日：2016-05-17

申请号：US12554365

申请日：2009-09-04

申请人： Seiji Furuhashi ,  Jun Haga ,  Takayuki Nishi

发明人： Seiji Furuhashi ,  Jun Haga ,  Takayuki Nishi

IPC分类号： C22C38/12 ,  C23C2/06 ,  C22C38/04 ,  C22C38/14 ,  C23C2/28

CPC分类号： C22C38/14 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C23C2/06 ,  C23C2/28

摘要： A high strength cold-rolled steel sheet and a high strength plated steel sheet which have an excellent surface appearance required for outer panels of automobiles and which have an extremely high r value in a direction at 45° with respect to the rolling direction and which have excellent press formability and a tensile strength of at least 340 MPa and a process for their manufacture are provided. The steel sheets have a chemical composition consisting essentially of, in mass %, C: 0.0005-0.025%, Si: at most 0.2%, Mn: 0.3-2.5%, P: at most 0.15%, S: at most 0.02%, N: at most 0.006%, sol. Al: less than 0.005%, Ti: 0.005-0.05%, and Nb: 0.020-0.200% with the mass ratio (Nb/Ti) of the contents of Nb and Ti being at least 2, and a remainder of Fe and impurities, and they have an r value in a direction at 45° with respect to the rolling direction (r45) of at least 1.80 and/or a mean r value (rm) of at least 1.60, and a tensile strength of at least 340 MPa.

摘要翻译： 具有汽车外面板所需的表面外观优异的高强度冷轧钢板和高强度电镀钢板，其相对于轧制方向在45°的方向上具有极高的r值， 提供优异的压制成形性和至少340MPa的拉伸强度及其制造方法。 钢板的化学组成基本上以质量％计含有C：0.0005-0.025％，Si：0.2％以下，Mn：0.3〜2.5％，P：0.15％以下，S：0.02％以下， N：最多0.006％，溶胶。 Al：Nb和Ti的含量的质量比（Nb / Ti）为2以上，余量为Fe和杂质的Al：小于0.005％，Ti：0.005〜0.05％，Nb：0.020〜0.200％ 并且它们在相对于轧制方向（r45）为45°的方向上的r值为至少1.80和/或至少1.60的平均r值（rm）和至少340MPa的拉伸强度。

公开(公告)号：US20080202638A1

公开(公告)日：2008-08-28

申请号：US12003945

申请日：2008-01-03

申请人： Jun Haga ,  Nobusato Kojima

发明人： Jun Haga ,  Nobusato Kojima

IPC分类号： C21D7/00 ,  C22C38/00 ,  C22C38/04 ,  C21D7/13 ,  C21D7/02 ,  C22C38/02

CPC分类号： C22C38/18 ,  C21D7/02 ,  C21D7/13 ,  C21D8/0405 ,  C21D8/0463 ,  C21D9/48 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/02 ,  C22C38/04 ,  C23C2/06 ,  C23C2/28 ,  C23C2/40

摘要： A high-strength cold-rolled steel sheet providing a product with a good surface condition after press forming, having excellent bake hardenability and anti room temperature aging property, and having a dual phase structure with a tensile strength of at least 340 MPa is provided.A high-strength cold-rolled steel sheet has a structure comprising a main phase which is a ferrite and a secondary phase which is a low temperature transformation product including a martensite and has a hardness distribution of the ferrite phase in an arbitrary cross section having a length of 10 mm in the widthwise direction of the sheet which satisfies the relationship prescribed by (Hv(max)−Hv(ave))

摘要翻译： 提供一种高压冷轧钢板，其提供压制成型后具有良好表面状态的产品，具有优异的烘烤淬透性和抗室温时效性，并且具有拉伸强度至少为340MPa的双相结构。 高强度冷轧钢板具有包括作为铁素体的主相和作为包含马氏体的低温相变产物的第二相的结构，并且具有在任意截面的铁素体相的硬度分布，其具有 满足由（Hv（max）-Hv（ave））规定的关系的片材的宽度方向上的长度为10mm的高度（< （ave）Hv（max）是在厚度方向（1/8）t至（¼）t的距离处的区域中的铁素体晶粒的最大维氏硬度 当高强度冷轧钢板的厚度为t时，从表面出发，Hv（ave）是该区域的铁素体晶粒的平均维氏硬度。

公开(公告)号：US08828153B2

公开(公告)日：2014-09-09

申请号：US12962950

申请日：2010-12-08

申请人： Jun Haga ,  Nobusato Kojima

发明人： Jun Haga ,  Nobusato Kojima

IPC分类号： C22C38/32 ,  C21D9/46 ,  C23C2/06 ,  C21D7/02 ,  C21D9/48 ,  C22C38/18 ,  C21D8/04 ,  C21D7/13 ,  C23C2/28 ,  C23C2/40 ,  C22C38/02

CPC分类号： C22C38/18 ,  C21D7/02 ,  C21D7/13 ,  C21D8/0405 ,  C21D8/0463 ,  C21D9/48 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/02 ,  C22C38/04 ,  C23C2/06 ,  C23C2/28 ,  C23C2/40

摘要： A high-strength cold-rolled steel sheet providing a product with a good surface condition after press forming, having excellent bake hardenability and anti room temperature aging property, and having a dual phase structure with a tensile strength of at least 340 MPa is provided. A high-strength cold-rolled steel sheet has a structure comprising a main phase which is a ferrite and a secondary phase which is a low temperature transformation product including a martensite and has a hardness distribution of the ferrite phase in an arbitrary cross section having a length of 10 mm in the widthwise 10 direction of the sheet which satisfies the relationship prescribed by (HV(max)−HV(ave))

摘要翻译： 提供一种高压冷轧钢板，其提供压制成型后具有良好表面状态的产品，具有优异的烘烤淬透性和抗室温时效性，并且具有拉伸强度至少为340MPa的双相结构。 高强度冷轧钢板具有包括作为铁素体的主相和作为包含马氏体的低温相变产物的第二相的结构，并且具有在任意截面的铁素体相的硬度分布，其具有 满足（HV（max）-HV（ave））规定的关系的片材的宽度方向10方向的长度为10mm（Hv（ave））HV（max）是铁素体晶粒的最大维氏硬度 在高强度冷轧钢板的厚度为t时，从表面的厚度方向距离（⅛）t〜（¼）t的距离的区域中，Hv（ave）为平均维氏硬度 的铁素体晶粒。

公开(公告)号：US20100084057A1

公开(公告)日：2010-04-08

申请号：US12554365

申请日：2009-09-04

申请人： Seiji Furuhashi ,  Jun Haga ,  Takayuki Nishi

发明人： Seiji Furuhashi ,  Jun Haga ,  Takayuki Nishi

IPC分类号： C21D8/02 ,  C22C38/04 ,  C22C38/00 ,  C22C38/16 ,  C22C38/22 ,  C22C38/42

CPC分类号： C22C38/14 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C23C2/06 ,  C23C2/28

摘要： A high strength cold-rolled steel sheet and a high strength plated steel sheet which have an excellent surface appearance required for outer panels of automobiles and which have an extremely high r value in a direction at 45° with respect to the rolling direction and which have excellent press formability and a tensile strength of at least 340 MPa and a process for their manufacture are provided. The steel sheets have a chemical composition consisting essentially of, in mass %, C: 0.0005-0.025%, Si: at most 0.2%, Mn: 0.3-2.5%, P: at most 0.15%, S: at most 0.02%, N: at most 0.006%, sol. Al: less than 0.005%, Ti: 0.005-0.05%, and Nb: 0.020-0.200% with the mass ratio (Nb/Ti) of the contents of Nb and Ti being at least 2, and a remainder of Fe and impurities, and they have an r value in a direction at 45° with respect to the rolling direction (r45) of at least 1.80 and/or a mean r value (0 of at least 1.60, and a tensile strength of at least 340 MPa.

摘要翻译： 具有汽车外面板所需的表面外观优异的高强度冷轧钢板和高强度电镀钢板，其相对于轧制方向在45°的方向上具有极高的r值， 提供优异的压制成形性和至少340MPa的拉伸强度及其制造方法。 钢板的化学组成基本上以质量％计含有C：0.0005-0.025％，Si：0.2％以下，Mn：0.3〜2.5％，P：0.15％以下，S：0.02％以下， N：最多0.006％，溶胶。 Al：Nb和Ti的含量的质量比（Nb / Ti）为2以上，余量为Fe和杂质的Al：小于0.005％，Ti：0.005〜0.05％，Nb：0.020〜0.200％ 并且它们在相对于轧制方向（r45）为45°的方向上的r值为至少1.80和/或平均r值（0至少为1.60，抗拉强度为至少340MPa）具有r值。