公开(公告)号：US09765413B2

公开(公告)日：2017-09-19

申请号：US13809953

申请日：2011-07-12

申请人： Yoshiyasu Kawasaki ,  Tatsuya Nakagaito ,  Shinjiro Kaneko ,  Yasunobu Nagataki ,  Keisuke Fukushi

发明人： Yoshiyasu Kawasaki ,  Tatsuya Nakagaito ,  Shinjiro Kaneko ,  Yasunobu Nagataki ,  Keisuke Fukushi

IPC分类号： C21D6/00 ,  B05D3/12 ,  B05D3/02 ,  C21D9/46 ,  C22C38/00 ,  C22C38/06 ,  C23C2/40 ,  C22C1/02

CPC分类号： C21D6/005 ,  B05D3/0218 ,  B05D3/12 ,  B32B15/013 ,  C21D6/008 ,  C21D9/46 ,  C21D2211/005 ,  C21D2211/008 ,  C22C1/02 ,  C22C38/00 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C23C2/40 ,  Y10T428/12965

摘要： A high-strength galvanized steel sheet with high yield ratio having excellent ductility and stretch flange formability, the steel sheet having a chemical composition containing, by mass %, C: 0.04% or more and 0.13% or less, Si: 0.9% or more and 2.3% or less, Mn: 0.8% or more and 2.4% or less, P: 0.1% or less, S: 0.01% or less, Al: 0.01% or more and 0.1% or less, N: 0.008% or less, and the balance being Fe and inevitable impurities and a microstructure including, in terms of area ratio, 94% or more of a ferrite phase and 2% or less of a martensite ferrite phase, wherein mean grain size of ferrite is 10 μm or less, Vickers hardness of ferrite is 140 or more, mean grain size of carbide particles existing at grain boundaries of ferrite is 0.5 μm or less, and aspect ratio of carbide particles existing at the grain boundaries of ferrite is 2.0 or less.

公开(公告)号：US09157132B2

公开(公告)日：2015-10-13

申请号：US13254528

申请日：2010-02-19

申请人： Shinjiro Kaneko ,  Yoshiyasu Kawasaki ,  Tatsuya Nakagaito ,  Saiji Matsuoka

发明人： Shinjiro Kaneko ,  Yoshiyasu Kawasaki ,  Tatsuya Nakagaito ,  Saiji Matsuoka

IPC分类号： C21D9/46 ,  C21D6/00 ,  C21D8/02 ,  C21D9/48 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/34 ,  C22C38/38 ,  C23C2/02 ,  C23C2/06 ,  C23C2/28 ,  B32B15/01 ,  C22C38/00

CPC分类号： C21D9/46 ,  B32B15/013 ,  C21D6/005 ,  C21D8/0205 ,  C21D9/48 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/34 ,  C22C38/38 ,  C23C2/02 ,  C23C2/06 ,  C23C2/28

摘要： The high-strength galvanized steel sheet having excellent formability has a component composition containing, on the basis of mass percent, 0.05 to 0.2% C, 0.5 to 2.5% Si, 1.5 to 3.0% Mn, 0.001 to 0.05% P, 0.0001 to 0.01% S, 0.001 to 0.1% Al, and 0.0005 to 0.01% N, the balance being Fe and incidental impurities; and the steel sheet has a microstructure including a ferritic phase and a martensitic phase including a tempered-martensitic phase, the ferritic phase having an area fraction of 30% or more relative to an entirety of the microstructure, the martensitic phase having an area fraction of 30 to 50% relative to the entirety of the microstructure, and the tempered-martensitic phase having an area fraction of 70% or more relative to an entirety of the martensitic phase.

摘要翻译： 具有优异成形性的高强度镀锌钢板具有以质量％计含有0.05〜0.2％C，0.5〜2.5％Si，1.5〜3.0％Mn，0.001〜0.05％P，0.0001〜0.01 ％S，0.001〜0.1％Al，0.0005〜0.01％N，余量为Fe和附带杂质; 并且钢板具有包括铁素体相和包含回火 - 马氏体相的马氏体相的组织，所述铁素体相相对于整个微结构具有30％以上的面积分率，所述马氏体相的面积分数为 相对于整个微观结构为30〜50％，相对于整个马氏体相的面积率为70％以上的回火 - 马氏体相。

公开(公告)号：US20140360634A1

公开(公告)日：2014-12-11

申请号：US14241256

申请日：2012-08-09

申请人： Yoshiyasu Kawasaki ,  Shinjiro Kaneko ,  Yasunobu Nagataki

发明人： Yoshiyasu Kawasaki ,  Shinjiro Kaneko ,  Yasunobu Nagataki

IPC分类号： C22C38/18 ,  C21D9/46 ,  C22C38/16 ,  C22C38/14 ,  C22C38/00 ,  C22C38/08 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C21D8/02 ,  C22C38/12

CPC分类号： C22C38/18 ,  B32B15/013 ,  C21D6/005 ,  C21D8/02 ,  C21D8/0263 ,  C21D9/46 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/58 ,  C23C2/02 ,  C23C2/06

摘要： A hot rolled steel sheet having a chemical composition containing, by mass %, C: 0.04% or more and 0.20% or less, Si: 0.7% or more and 2.3% or less, Mn: 0.8% or more and 2.8% or less, P: 0.1% or less, S: 0.01% or less, Al: 0.1% or less, N: 0.008% or less, and the balance being Fe and inevitable impurities. The microstructure of the hot rolled steel sheet includes ferrite and pearlites, in which the area ratio of the ferrite is 75% or more and less than 95%, the mean grain size of the ferrite is 5 μm or more and 25 μm or less, the area ratio of pearlite is 5% or more and less than 25%, the mean grain size of pearlite is 2.0 μm or more, and the mean free path of pearlite is 5 μm or more.

摘要翻译： 1.一种化学成分含有C：0.04％以上且0.20％以下，Si：0.7％以上且2.3％以下，Mn：0.8％以上且2.8％以下的化学组成的热轧钢板 ，P：0.1％以下，S：0.01％以下，Al：0.1％以下，N：0.008％以下，余量为Fe和不可避免的杂质。 热轧钢板的微细结构包括铁素体和珠光体，其中铁素体的面积比为75％以上且小于95％，铁素体的平均粒径为5μm以上且25μm以下， 珠光体的面积比为5％以上且小于25％，珠光体的平均粒径为2.0μm以上，珠光体的平均自由程为5μm以上。

公开(公告)号：US08815026B2

公开(公告)日：2014-08-26

申请号：US12864766

申请日：2008-12-12

申请人： Shinjiro Kaneko ,  Yoshiyasu Kawasaki ,  Saiji Matsuoka ,  Yoshitsugu Suzuki ,  Koji Maitake

发明人： Shinjiro Kaneko ,  Yoshiyasu Kawasaki ,  Saiji Matsuoka ,  Yoshitsugu Suzuki ,  Koji Maitake

IPC分类号： C22C38/32 ,  C22C38/38 ,  C22C38/28 ,  C23C30/00 ,  C23C2/02 ,  C23C2/06 ,  C22C38/02 ,  C21D9/48 ,  C22C38/06 ,  C22C38/00 ,  C23C2/28

CPC分类号： C23C2/06 ,  B32B15/013 ,  C21D9/48 ,  C22C18/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/06 ,  C22C38/22 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/34 ,  C22C38/38 ,  C22C38/42 ,  C22C38/50 ,  C22C38/54 ,  C22C38/58 ,  C23C2/02 ,  C23C2/28 ,  Y10T428/12799

摘要： A high strength galvanized steel sheet having a TS of 780 MPa or more and exhibiting excellent stretch frangeability and bendability and a method for manufacturing the same are provided. The component composition contains C: 0.05% to 0.15%, Si: 0.8% to 2.5%, Mn: 1.5% to 3.0%, P: 0.001% to 0.05%, S: 0.0001% to 0.01%, Al: 0.001% to 0.1%, N: 0.0005% to 0.01%, Cr: 0.1% to 1.0%, Ti: 0.0005% to 0.1%, B: 0.0003% to 0.003%, and the remainder composed of iron and incidental impurities, on a percent by mass basis. The microstructure includes 30% or more of ferrite phase and 30% or more, and 70% or less of martensite phase on an areal fraction basis, wherein regarding the above-described martensite phase, the proportion of a tempered martensite phase is 20% or more relative to the whole martensite phase and the proportion of a martensite phase having a grain diameter of 1 μm or less is 10% or less relative to the whole martensite phase.

摘要翻译： 提供TS为780MPa以上且具有优异的伸缩性和弯曲性的高强度镀锌钢板及其制造方法。 组分组成包含C：0.05％至0.15％，Si：0.8％至2.5％，Mn：1.5％至3.0％，P：0.001％至0.05％，S：0.0001％至0.01％，Al：0.001％至0.1 ％，N：0.0005〜0.01％，Cr：0.1〜1.0％，Ti：0.0005〜0.1％，B：0.0003〜0.003％，余量由铁和杂质构成 。 微结构包含30％以上的铁素体相，30％以上，70％以下的马氏体相，其中，对于上述马氏体相，回火马氏体相的比例为20％， 更相对于整个马氏体相，并且相对于整个马氏体相，具有1μm以下的粒径的马氏体相的比例为10％以下。

公开(公告)号：US20130048155A1

公开(公告)日：2013-02-28

申请号：US13522050

申请日：2011-01-18

申请人： Shinjiro Kaneko ,  Tatsuya Nakagaito ,  Yoshiyasu Kawasaki ,  Yasunobu Nagataki

发明人： Shinjiro Kaneko ,  Tatsuya Nakagaito ,  Yoshiyasu Kawasaki ,  Yasunobu Nagataki

IPC分类号： B32B15/01 ,  C21D8/02 ,  C23C2/02

CPC分类号： C23C2/06 ,  B32B15/013 ,  C21D8/0205 ,  C21D9/46 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/009 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C23C2/02 ,  C23C2/28

摘要： A high-strength galvanized steel sheet contains C: 0.04% or more and 0.10% or less, Si: 0.7% or more and 2.3% or less, Mn: 0.8% or more and 2.0% or less, P: 0.03% or less, S: 0.003% or less, Al: 0.1% or less, and N: 0.008% or less on a mass percent basis, and the remainder of iron and incidental impurities. The C content [C%] (% by mass) and the Si content [Si%] (% by mass) satisfy [C%]×[Si%]≦0.20. A ferrite phase constitutes 75% or more, a bainitic ferrite phase constitutes 1% or more, a pearlite phase constitutes 1% or more and 10% or less, and a martensite phase constitutes less than 5% on an area ratio basis. The area ratio of the martensite phase/(the area ratio of the bainitic ferrite phase + the area ratio of the pearlite phase) is 0.6 or less.

摘要翻译： 高强度镀锌钢板的C：0.04％以上且0.10％以下，Si：0.7％以上且2.3％以下，Mn：0.8％以上且2.0％以下，P：0.03％以下 ，S：0.003％以下，Al：0.1％以下，N：0.008％以下，剩余的铁和杂质。 C含量[C％]（质量％）和Si含量[Si％]（质量％）满足[C％]×[Si％]＆nlE; 0.20。 铁素体相构成75％以上，贝氏体铁素体相为1％以上，珠光体相为1％以上10％以下，马氏体相占面积比为5％以下。 马氏体相的面积比（贝氏体相的面积比+珠光体相的面积比）为0.6以下。

公开(公告)号：US20120118438A1

公开(公告)日：2012-05-17

申请号：US13378501

申请日：2010-06-07

申请人： Tatsuya Nakagaito ,  Yoshiyasu Kawasaki ,  Shinjiro Kaneko ,  Saiji Matsuoka ,  Yoshitsugu Suzuki

发明人： Tatsuya Nakagaito ,  Yoshiyasu Kawasaki ,  Shinjiro Kaneko ,  Saiji Matsuoka ,  Yoshitsugu Suzuki

IPC分类号： C23C2/02 ,  C21D1/26 ,  B32B15/00 ,  C21D6/00

CPC分类号： C23C2/02 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0263 ,  C21D8/0273 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C23C2/06 ,  C23C2/28

摘要： The present invention provides a high-strength galvanized steel sheet having excellent ductility, stretch flangeability, and fatigue resistance, and a method for manufacturing the same. A high-strength galvannealed steel sheet having excellent formability and fatigue resistance is characterized in that the steel sheet is composed of steel having a composition containing, by % by mass, C: 0.05% to 0.3%, Si: 0.5% to 2.5%, Mn: 1.0% to 3.5%, P: 0.003% to 0.100%, S: 0.02% or less, Al: 0.010% to 0.1%, and the balance including iron and unavoidable impurities, and the steel sheet has a microstructure containing 50% or more of ferrite, 5% to 35% of martensite, and 2% to 15% of pearlite in terms of an area ratio, the martensite having an average gain size of 3 μm or less and an average distance of 5 μm or less between adjacent martensite grains.

摘要翻译： 本发明提供一种延展性，拉伸凸缘性，耐疲劳性优异的高强度镀锌钢板及其制造方法。 优异的成形性和耐疲劳性的高强度合金化热浸镀锌钢板的特征在于，钢板由以质量％计含有C：0.05〜0.3％，Si：0.5〜2.5％的组成的钢构成， Mn：1.0〜3.5％，P：0.003〜0.100％，S：0.02％以下，Al：0.010〜0.1％，余量包括铁和不可避免的杂质，钢板的组织含有50％ 以上的铁素体，5〜35％的马氏体和2〜15％的珠光体的面积比，马氏体的平均增益尺寸为3μm以下，平均距离为5μm以下， 相邻的马氏体颗粒。

公开(公告)号：US20100112377A1

公开(公告)日：2010-05-06

申请号：US12594018

申请日：2008-03-27

申请人： Shinjiro Kaneko ,  Hiroshi Matsuda ,  Yoshiyasu Kawasaki ,  Tatsuya Nakagaito ,  Yoshitsugu Suzuki ,  Yusuke Fushiwaki ,  Takashi Kawano ,  Saiji Matsuoka

发明人： Shinjiro Kaneko ,  Hiroshi Matsuda ,  Yoshiyasu Kawasaki ,  Tatsuya Nakagaito ,  Yoshitsugu Suzuki ,  Yusuke Fushiwaki ,  Takashi Kawano ,  Saiji Matsuoka

IPC分类号： B32B15/01

CPC分类号： C23C2/06 ,  B32B15/013 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C23C2/28 ,  Y10T428/12799 ,  Y10T428/12951 ,  Y10T428/12972

摘要： A high-strength galvanized steel sheet is provided which has a tensile strength of a level of about 590 MPa and superior formability, including a coating with good appearance. The galvanized steel sheet includes a base steel and a galvanized coating layer formed over the surface of the base steel. The galvanized steel sheet has a chemical composition containing 0.005% to 0.12% of C, 0.7% to 2.7% of Si, 0.5% to 2.8% of Mn, 0.1% or less of P, 0.07% or less of S, 1.0% or less of Al, 0.008% or less of N, and the balance being Fe and inevitable impurities on a mass basis, and a microstructure constituted of at least 90% of ferrite and 2% to 10% of martensite on an area basis. The ferrite has a Vickers hardness of 120 or more on average, and an inclusion is precipitated from the grain boundary with a length of 50% or less relative to the entire length of the grain boundary in the surface layer of the base steel with a depth of 3 μm from the interface between the coating layer and the base steel.

摘要翻译： 提供了具有约590MPa的拉伸强度和优异的成形性的高强度镀锌钢板，包括具有良好外观的涂层。 镀锌钢板包括基体钢和形成在基体钢表面上的镀锌层。 镀锌钢板具有C：0.005〜0.12％，Si：0.7〜2.7％，Mn：0.5〜2.8％，P：0.1％以下，S：0.07％以下，1.0％以下 少量的Al，0.008％以下的N，余量为Fe和不可避免的杂质，基于面积的至少90％的铁素体和2〜10％的马氏体构成。 铁素体的维氏硬度平均为120以上，相对于基体钢的表层的晶界的全长为50％以下，从晶界析出的夹杂物的深度为深度 距涂层和基体钢之间的界面为3微米。

公开(公告)号：US09340859B2

公开(公告)日：2016-05-17

申请号：US14119656

申请日：2012-06-01

申请人： Mai Miyata ,  Yoshitsugu Suzuki ,  Yoshiyasu Kawasaki ,  Tatsuya Nakagaito ,  Shinjiro Kaneko ,  Yasunobu Nagataki

发明人： Mai Miyata ,  Yoshitsugu Suzuki ,  Yoshiyasu Kawasaki ,  Tatsuya Nakagaito ,  Shinjiro Kaneko ,  Yasunobu Nagataki

IPC分类号： C21D1/76 ,  C22C38/02 ,  C23C2/06 ,  C23C2/02 ,  C21D9/46 ,  C22C38/06 ,  C22C38/58 ,  C23C2/40 ,  C21D1/74 ,  B32B15/01 ,  C22C38/00 ,  C22C38/04 ,  C22C38/24 ,  C22C38/34 ,  C22C38/38 ,  C23C2/28

CPC分类号： C23C2/02 ,  B32B15/013 ,  C21D1/74 ,  C21D1/76 ,  C21D9/46 ,  C21D2211/005 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/24 ,  C22C38/34 ,  C22C38/38 ,  C22C38/58 ,  C23C2/06 ,  C23C2/285 ,  C23C2/40

摘要： A method of manufacturing a high strength galvanized steel sheet has a first heating step including heating to 400° C. to 750° C. in an atmosphere containing O2: 0.1 to 20 percent and H2O: 1 to 50 percent and heating to 600° C. to 850° C. in an atmosphere containing O2: 0.01 to less than 0.1 percent and H2O: 1 to 20 percent is applied to a steel sheet, a second heating step includes holding the steel sheet in an atmosphere containing H2: 1 to 50 percent and having a dew point of 0° C. or lower at 750° C. to 900° C. for 15 to 600 s, cooling to a temperature of 450° C. to 550° C., and holding is performed at that temperature for 10 to 200 s, and a galvanization treatment is applied.

摘要翻译： 制造高强度镀锌钢板的方法具有第一加热步骤，包括在含有O 2的气氛中加热至400℃至750℃：0.1至20％，H 2 O：1至50％并加热至600℃ 在含有O 2：0.01〜小于0.1％，H 2 O：1〜20％的气氛中在850℃下进行加热，第2加热工序包括将钢板保持在含有H2的气氛中：1〜50 并且在750℃至900℃露点为0℃或更低的温度为15至600秒，冷却至450℃至550℃的温度，并在该温度下进行保持 温度为10〜200秒，进行镀锌处理。

公开(公告)号：US20140230971A1

公开(公告)日：2014-08-21

申请号：US14342550

申请日：2012-09-10

申请人： Yoshiyasu Kawasaki ,  Hiroshi Hasegawa ,  Tatsuya Nakagaito ,  Yasunobu Nagataki

发明人： Yoshiyasu Kawasaki ,  Hiroshi Hasegawa ,  Tatsuya Nakagaito ,  Yasunobu Nagataki

IPC分类号： C22C38/38 ,  C23C2/02 ,  C22C38/24 ,  C22C38/14 ,  C22C38/00 ,  C22C38/08 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C21D8/02 ,  C22C38/12

CPC分类号： C22C38/38 ,  B21B3/00 ,  B21B2001/221 ,  B21B2001/225 ,  B21B2265/14 ,  B32B15/013 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0247 ,  C21D8/0263 ,  C21D9/46 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/24 ,  C22C38/58 ,  C22C38/60 ,  C23C2/02 ,  C23C2/06 ,  C23C2/28 ,  C23C2/40

摘要： A method for manufacturing the high strength steel sheet having excellent formability includes hot-rolling a steel slab having a chemical composition containing, by mass %, C: 0.03% or more and 0.35% or less, Si: 0.5% or more and 3.0% or less, Mn: 3.5% or more and 10.0% or less, P: 0.1% or less, S: 0.01% or less, N: 0.008% or less and the balance comprising Fe and inevitable impurities, coiling the hot-rolled steel sheet at a temperature range of the Ar1 transformation point to the Ar1 transformation point+(the Ar3 transformation point−the Ar1 transformation point)/2, cooling the coiled steel sheet down to 200° C. or lower, heating and holding the cooled steel sheet at a temperature range of the Ac1 transformation point−200° C. to the Ac1 transformation point for 30 minutes or more, pickling the heated steel sheet, cold-rolling the pickled steel sheet under the condition that the rolling reduction is 20% or more, and heating and holding the cold-rolled steel sheet at a temperature range of the Ac1 transformation point to the Ac1 transformation point+(the Ac3 transformation point−the Ac1 transformation point)/2 for 30 seconds or more.

摘要翻译： 制造成型性优异的高强度钢板的制造方法包括：将以质量％计含有C：0.03％以上且0.35％以下的化学组成的钢坯热轧，Si：0.5％以上3.0％ 以下，Mn：3.5％以上且10.0％以下，P：0.1％以下，S：0.01％以下，N：0.008％以下，剩余部分含有Fe和不可避免的杂质，卷取热轧钢 在Ar1相变点到Ar1相变点+（Ar3相变点-Ar1相变点）/ 2的温度范围内，将盘卷钢板冷却至200℃以下，加热保持冷却后的钢板 在Ac1相变点-200℃到Ac1相变点的温度范围为30分钟以上的条件下，对加热后的钢板进行酸洗，在轧制压下率为20％以上的条件下冷轧酸洗钢板 ，并且对该冷轧钢板进行加热保持 Ac1变换点的范围为Ac1变换点+（Ac3变换点 - Ac1变换点）/ 2为30秒以上。

公开(公告)号：US08430975B2

公开(公告)日：2013-04-30

申请号：US12864586

申请日：2009-01-19

申请人： Tatsuya Nakagaito ,  Saiji Matsuoka ,  Shinjiro Kaneko ,  Yoshiyasu Kawasaki ,  Yoshitsugu Suzuki

发明人： Tatsuya Nakagaito ,  Saiji Matsuoka ,  Shinjiro Kaneko ,  Yoshiyasu Kawasaki ,  Yoshitsugu Suzuki

IPC分类号： C22C38/02 ,  C22C38/06 ,  B32B15/18

CPC分类号： C21D8/0263 ,  C21D1/25 ,  C21D8/0436 ,  C21D8/0447 ,  C21D9/48 ,  C21D2211/001 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C22C38/38 ,  C23C2/02 ,  Y10T428/12799

摘要： A high-strength galvanized steel sheet has a TS of at least 590 MPa and excellent ductility and stretch flangeability and a method for manufacturing the high-strength galvanized steel sheet. The galvanized steel sheet contains, on the basis of mass percent, C: 0.05% to 0.3%, Si: 0.01% to 2.5%, Mn: 0.5% to 3.5%, P: 0.003% to 0.100% or less, S: 0.02% or less, and Al: 0.010% to 1.5%. The total of Si and Al is 0.5% to 2.5%. The remainder are iron and incidental impurities, contain 20% or more of ferrite phase, 10% or less of martensite phase, and 10% to 60% of tempered martensite, on the basis of area percent, and 3% to 10% of retained austenite phase on the basis of volume fraction. The retained austenite has an average grain size of 2.0 μm or less.

摘要翻译： 高强度镀锌钢板的TS为至少590MPa，延展性和拉伸凸缘性优异，高强度镀锌钢板的制造方法。 镀锌钢板以质量％计含有C：0.05〜0.3％，Si：0.01〜2.5％，Mn：0.5〜3.5％，P：0.003〜0.100％以下，S：0.02 ％以下，Al：0.010〜1.5％。 Si和Al的总和为0.5％至2.5％。 剩余部分为铁和杂质，基于面积百分比含有20％以上的铁素体相，10％以下的马氏体相和10％〜60％的回火马氏体，3％〜10％的保留 基于体积分数的奥氏体相。 残留奥氏体的平均粒径为2.0μm以下。