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1. 发明授权

US06767417B2 Steel sheet and method for manufacturing the same 有权
标题翻译：钢板及其制造方法
公开(公告)号：US06767417B2
公开(公告)日：2004-07-27
申请号：US10255349
申请日：2002-09-26
申请人： Takeshi Fujita , Kenichi Mitsuzuka , Nobuyuki Nakamura , Toshiaki Urabe , Katsutoshi Ito , Hideyuki Tsurumaru
发明人： Takeshi Fujita , Kenichi Mitsuzuka , Nobuyuki Nakamura , Toshiaki Urabe , Katsutoshi Ito , Hideyuki Tsurumaru
IPC分类号： C22C3814
CPC分类号： C22C38/02 , C21D1/42 , C21D9/46 , C21D2211/003 , C22C38/001 , C22C38/002 , C22C38/04 , C22C38/06 , C22C38/14 , Y02P10/253
摘要： The present invention relates to a steel sheet that consists essentially of 0.10 to 0.37% C, 1% or less Si, 2.5% or less Mn, 0.1% or less P, 0.03% or less S, 0.01 to 0.1% sol.Al, 0.0005 to 0.0050% N, 0.0003 to 0.0050% B, by mass, and balance of Fe, [14B/(10.8N)] being 0.5 or more, average particle size of precipitate BN being 0.1 &mgr;m or more, and grain size of prior austenite after the hardening treatment being 2 to 25 &mgr;m. The steel sheet according to the present invention allows an inexpensive hardening treatment method to be applied to improve the strength to a level required for the structural components and the functional components of automobiles, while providing excellent toughness after the hardening treatment.
摘要翻译：本发明涉及一种钢板，其主要由0.10〜0.37％的C，1％以下的Si，2.5％以下的Mn，0.1％以下的P，0.03％以下的S，0.01〜0.1％的溶胶， 0.0005〜0.0050％N，0.0003〜0.0050％B，质量％，余量为Fe，[14B /（10.8N）]为0.5以上，析出物BN的平均粒径为0.1μm以上，硬化处理后的奥氏体为2〜25μm。根据本发明的钢板允许采用便宜的硬化处理方法，以提高强度达到汽车的结构部件和功能部件所需的水平，同时在硬化处理之后提供优异的韧性。

2. 发明授权

US06695933B2 Ultra-high strength cold rolled steel sheet and method for manufacturing the same 有权
标题翻译：超高强度冷轧钢板及其制造方法
公开(公告)号：US06695933B2
公开(公告)日：2004-02-24
申请号：US10108749
申请日：2002-03-28
申请人： Kohei Hasegawa , Toshiaki Urabe , Akihide Yoshitake , Hideyuki Tsurumaru
发明人： Kohei Hasegawa , Toshiaki Urabe , Akihide Yoshitake , Hideyuki Tsurumaru
IPC分类号： C21D802
CPC分类号： C22C38/06 , C21D1/19 , C21D8/0273 , C21D9/52 , C21D2211/008 , C22C38/38
摘要： An ultra-high strength cold rolled steel sheet having a tensile strength of 880 to 1170 MPa, that consists essentially of 0.01 to 0.07% C, 0.3% or less Si, 0.1% or less P, 0.01% or less S, 0.01 to 0.1% sol.Al, 0.0050% or less N, 1.6 to 2.5% of the sum of at least one element selected from the group consisting of Mn, Cr, and Mo, by mass, and a balance of Fe, and that has an inner zone deeper than 10 &mgr;m from the surface of the steel sheet being substantially a martensitic single phase structure. Since the steel sheet has a hole expansion ratio of 75% or more, specified by the Standard of Japan Iron and Steel Federation, JFST1001-1996, the steel sheet has a tensile strength in a range of from 880 to 1170 MPa, and an excellent mechanically joining property, and is suitable for fabricating automobile seat frames.
摘要翻译：一种抗拉强度为880〜1170MPa的超高强度冷轧钢板，其基本上由0.01〜0.07％的C，0.3％以下的Si，0.1％以下的P，0.01％以下的S，0.01〜0.1 ％sol.Al，0.0050％以下N，选自Mn，Cr和Mo中的至少一种元素的总和的1.6〜2.5％，余量为Fe，并且具有内部距离钢板表面大于10um的区域基本上是马氏体单相结构。由于钢板具有75％以上的孔膨胀率，由日本钢铁联合会的标准JFST1001-1996规定，钢板的拉伸强度在880〜1170MPa的范围内，优异的机械接合性能，适用于制造汽车座椅框架。

3. 发明授权

US07507307B2 Method for producing cold rolled steel plate of super high strength 有权
标题翻译：生产超高强度冷轧钢板的方法
公开(公告)号：US07507307B2
公开(公告)日：2009-03-24
申请号：US10485229
申请日：2003-06-06
申请人： Kohei Hasegawa , Nobuyuki Nakamura , Toshiaki Urabe
发明人： Kohei Hasegawa , Nobuyuki Nakamura , Toshiaki Urabe
IPC分类号： C21D8/02
CPC分类号： C22C38/02 , C21D1/19 , C21D8/0236 , C21D8/0273 , C21D9/52 , C22C38/04
摘要： The present invention provides a method for manufacturing an ultra high strength cold-rolled steel sheet, comprising the step of continuously annealing a cold-rolled steel sheet consisting essentially of, in terms of weight percentages, 0.07 to 0.15% C, 0.7 to 2% Si, 1.8 to 3% Mn, 0.02% or less P, 0.01% or less S, 0.01 to 0.1% Sol. Al, 0.005% or less N, 0.0003 to 0.003% B, and the balance being Fe, in which such continuous annealing comprises the steps of: heating the cold-rolled steel sheet at from 800° C. to 870° C. for 10 seconds or more; slowly cooling the heated steel sheet down to from 650° C. to 750° C.; rapidly cooling the slowly cooled steel sheet down to 100° C. or less at a cooling speed of over 500° C./sec; reheating the rapidly cooled steel sheet at from 325° C. to 425° C. for from 5 minutes to 20 minutes; cooling the reheated steel sheet down to room temperature; and coiling the cooled steel sheet. According to the invention, the ultra high strength cold-rolled steel sheet, for use in a structural member of automobile, which has a tensile strength of 980 MPa or more and is excellent in stretch-flangeability, ductility, and spot-weldability can be obtained.
摘要翻译：本发明提供一种超高强度冷轧钢板的制造方法，其特征在于，包括下述工序：对冷轧钢板进行连续退火，所述冷轧钢板主要由以重量％计，0.07〜0.15％，0.7〜2％ Si，1.8〜3％Mn，0.02％以下P，0.01％以下S，0.01〜0.1％Sol。 Al，0.005％以下的N，0.0003〜0.003％的B，余量为Fe，其中这种连续退火包括以下步骤：将冷轧钢板从800℃加热至870℃10 秒或以上; 将加热的钢板缓慢冷却至650℃至750℃; 在500℃/秒的冷却速度下将缓慢冷却的钢板快速冷却至100℃或更低。将快速冷却的钢板从325℃加热至425℃5分钟至20分钟; 将再热钢板冷却至室温; 并卷取冷却后的钢板。根据本发明，用于汽车结构部件的拉伸强度为980MPa以上且拉伸凸缘性，延展性，点焊性优异的超高强度冷轧钢板可以是获得。

4. 发明授权

US07252722B2 Steel sheet 有权
标题翻译：钢板
公开(公告)号：US07252722B2
公开(公告)日：2007-08-07
申请号：US10792546
申请日：2004-03-02
申请人： Katsumi Nakajima , Takeshi Fujita , Toshiaki Urabe , Yuji Yamasaki , Fusato Kitano
发明人： Katsumi Nakajima , Takeshi Fujita , Toshiaki Urabe , Yuji Yamasaki , Fusato Kitano
IPC分类号： C22C38/12 , C22C38/26 , C22C38/48
CPC分类号： C22C38/14 , C21D8/0226 , C21D8/0236 , C21D8/0273 , C21D8/0278 , C21D2211/004 , C21D2211/005 , C22C38/002 , C22C38/004 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12 , Y10T428/12799
摘要： A steel sheet containing 0.004 to 0.02% C, 1.0% or less Si, 0.7 to 3.0% Mn, 0.02 to 0.15% P, 0.02% or less S, 0.01 to 0.1% Al, 0.004% or less N, 0.2% or less Nb, by mass %, optionally Ti, Bi or at least one element selected from the group consisting of Cr Mo, Ni and Cu, and the balance being Fe; the Nb content satisfying a formula of (12/93)×Nb*/C≧1.0, wherein Nb*=Nb−(93/14)×N, and wherein C, N and Nb designate the content in mass % of carbon, nitrogen and niobium, respectively; and a yield strength and an average grain size of the ferritic grains which satisfy a formula of YP≦−120×d+1280, wherein YP designates yield strength in MPa, and d designates an average size of ferritic grains in μm.
摘要翻译：含有0.004〜0.02％的C，1.0％以下的Si，0.7〜3.0％的Mn，0.02〜0.15％的P，0.02％以下的S，0.01〜0.1％的Al，0.004％以下的N，0.2％以下的钢 Nb，以质量％计，任选为Ti，Bi或选自Cr Mo，Ni和Cu中的至少一种元素，余量为Fe; 满足公式<？in-line-formula description =“In-line Formulas”end =“lead”？>（12/93）xNb * / C> = 1.0的Nb含量， =“In-line Formulas”end =“tail”？>其中Nb * = Nb-（93/14）xN，其中C，N和Nb分别表示碳，氮和铌的质量％并且满足公式<β在线公式描述=“在线公式”中的铁素体晶粒的屈服强度和平均晶粒尺寸end =“lead”→> YP <= - 120×d + 1280， in-line-formula description =“In-line Formulas”end =“tail”？>其中YP表示屈服强度（MPa），d表示母体中铁素体晶粒的平均尺寸。

5. 发明申请

US20050121119A1 Steel plate subjected to heat treatment and process for producing the same 审中-公开
标题翻译：进行热处理的钢板及其制造方法
公开(公告)号：US20050121119A1
公开(公告)日：2005-06-09
申请号：US10505575
申请日：2003-02-28
申请人： Kohei Hasegawa , Takeshi Fujita , Toshiaki Urabe
发明人： Kohei Hasegawa , Takeshi Fujita , Toshiaki Urabe
IPC分类号： C21D9/46 , C21D8/02 , C21D8/04 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/14 , C22C38/38
CPC分类号： C22C38/06 , C21D9/46 , C22C38/04 , C22C38/14
摘要： The present invention provides a steel sheet for heat treatment consisting essentially of, by mass %, 0.05-0.09% C, below 1% Si, 1.6-2.4% Mn, 0.02% P or less, 0.02% S or less, 0.01-0.1% sol. Al, 0.005% N or less, 0.0003-0.003% B, Ti in a range satisfying (48/32)S+(48/14)N≦Ti≦2[(48/32)S+(48/14)N], and the rest of Fe, wherein the average diameter of iron carbides precipitating in steel is 2 μm or smaller. The steel sheet for heat treatment according to the present invention has high strength and excellent hydrogen embrittlement resistance after being press formed and quenched, so that the steel sheet is well suited for automobile construction members.
摘要翻译：本发明提供一种热处理钢板，其基本上以质量％计含有0.05％-0.09％的C，低于1％的Si，1.6-2.4％的Mn，0.02％的P以下，0.02％以下的锡，0.01-0.1 ％溶胶 Al，0.005％N以下，0.0003〜0.003％B，满足（48/32）S +（48/14）N≤Ti≤2[（48/32）S +（48/14）N ]，其余的Fe，其中在钢中沉淀的碳化铁的平均直径为2μm或更小。根据本发明的热处理钢板在压制成形和淬火后具有高强度和优异的耐氢脆性，使得钢板非常适合于汽车构造构件。

6. 发明授权

US06743306B2 Steel sheet and method for manufacturing the same 有权
标题翻译：钢板及其制造方法
公开(公告)号：US06743306B2
公开(公告)日：2004-06-01
申请号：US10043903
申请日：2002-01-11
申请人： Katsumi Nakajima , Takeshi Fujita , Toshiaki Urabe , Yuji Yamasaki , Fusato Kitano
发明人： Katsumi Nakajima , Takeshi Fujita , Toshiaki Urabe , Yuji Yamasaki , Fusato Kitano
IPC分类号： C22C3812
CPC分类号： C22C38/14 , C21D8/0226 , C21D8/0236 , C21D8/0273 , C21D8/0278 , C21D2211/004 , C21D2211/005 , C22C38/002 , C22C38/004 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12 , Y10T428/12799
摘要： The steel sheet comprises: a ferritic phase having ferritic grains of 10 or more grain size number and ferritic grain boundaries; and at least one kind of Nb precipitates and Ti precipitates. The ferritic grain has a low density region with a low precipitate density in the vicinity of grain boundary. The low density region has a precipitate density of 60% or less to the precipitate density at center part of the ferritic grain. The steel sheet consists essentially of 0.002 to 0.02% C, 1% or less Si, 3% or less Mn, 0.1% or less P, 0.02% or less S, 0.01 to 0.1% sol.Al, 0.007% or less N, at least one element of 0.01 to 0.4% Nb and 0.005 to 0.3% Ti, by mass %, and the balance being Fe.
摘要翻译：钢板包括：铁素体相，其具有10个以上的晶粒数的铁素体晶粒和铁素体晶界; 和至少一种Nb析出物和Ti沉淀物。铁素体晶粒在晶界附近具有低沉淀密度的低密度区域。低密度区域的铁素体晶粒的中央部的析出密度为60％以下。钢板基本上由0.002〜0.02％的C，1％以下的Si，3％以下的Mn，0.1％以下的P，0.02％以下的S，0.01〜0.1％的sol.Al，0.007％以下的N， 0.01〜0.4％的Nb和0.005〜0.3％的Ti中的至少1种元素，其余为Fe。

7. 发明申请

US20070144633A1 High-stiffness high-strength thin steel sheet and method for producing the same 审中-公开
标题翻译：高强度高强度薄钢板及其制造方法
公开(公告)号：US20070144633A1
公开(公告)日：2007-06-28
申请号：US10578524
申请日：2005-03-31
申请人： Taro Kizu , Kaneharu Okuda , Toshiaki Urabe , Hiromi Yoshida , Yoshihiro Hosoya
发明人： Taro Kizu , Kaneharu Okuda , Toshiaki Urabe , Hiromi Yoshida , Yoshihiro Hosoya
IPC分类号： C21D8/02
CPC分类号： C22C38/02 , C21D9/46 , C21D2211/005 , C21D2211/008 , C22C38/04 , C22C38/14
摘要： There is provided a high-stiffness high-strength thin steel sheet having a tensile strength of not less than 590 MPa and a Young's modulus of not less than 230 GPa, which comprises C: 0.02-0.15%, Si: not more than 1.5%, Mn: 1.0-3.5%, P: not more than 0.05%, S: not more than 0.01%, Al: not more than 1.5%, N: not more than 0.01% and Ti: 0.02-0.50% as mass %, provided that C, N, S and Ti contents satisfy Ti*=Ti−(47.9/14)×N−(47.9/32.1)×S≧0.01 and 0.01≦C−(12/47.9)×Ti*≧0.05 and the remainder being substantially iron and inevitable impurities, and has a texture comprising a ferrite phase as a main phase and having a martensite phase at an area ratio of not less than 1%.
摘要翻译：提供抗拉强度不低于590MPa，杨氏模量不小于230GPa的高刚度高强度薄钢板，其包含C：0.02-0.15％，Si：不大于1.5％，Mn：1.0-3.5％，P：不大于0.05％，S：0.01％以下，Al：1.5％以下，N：0.01％以下，Ti：0.02-0.50％条件是C，N，S和Ti含量满足Ti * = Ti-（47.9 / 14）xN-（47.9 / 32.1）xS> 0.01和0.01 <= C-（12 / 47.9）xTi *> = 0.05，余量基本上是铁和不可避免的杂质，并且具有包含铁素体相作为主相并且具有不小于1％的面积比的马氏体相的织构。

8. 发明授权

US5062906A Method of making non-oriented electrical steel sheets 失效
公开(公告)号：US5062906A
公开(公告)日：1991-11-05
申请号：US427108
申请日：1989-10-12
申请人： Akihiko Nishimoto , Yoshihiro Hosoya , Kunikazu Tomita , Toshiaki Urabe , Masaharu Jitsukawa
发明人： Akihiko Nishimoto , Yoshihiro Hosoya , Kunikazu Tomita , Toshiaki Urabe , Masaharu Jitsukawa
IPC分类号： C21D8/12 , C22C38/00 , C22C38/04
CPC分类号： C21D8/1222 , C21D8/12
摘要： The present invention is to produce non-oriented electrical steel sheet by a hot direct rolling. The slab is directly sent to the hot rolling without the brief soaking, whereby others than AlN inevitably precipitated check the precipitation of AlN, a roughing and a finish rolling are performed at determined reduction rates, and a delay time is taken between the roughing and the finish rolling, and besides a finish rolling is performed at not more than Ar.sub.3 so that precipitating nuclei of AlN are effectively introduced into the steel, and uniform and coarse AlN precipitation is formed by a coiling at temperature of more than 700.degree. C., thereby to enable to provide uniform and satisfied ferrite grain growth at the recrystallization annealing.

9. 发明申请

US20070122554A1 Method for manufacturing galvannealed steel sheet 审中-公开
标题翻译：合金化热镀锌钢板的制造方法
公开(公告)号：US20070122554A1
公开(公告)日：2007-05-31
申请号：US10575054
申请日：2004-12-16
申请人： Hiroshi Matsuda , Shoichiro Taira , Keisuke Ono , Toshiaki Urabe , Yasunobu Nagataki , Yasushi Tanaka , Michitaka Sakurai , Yoshiharu Sugimoto
发明人： Hiroshi Matsuda , Shoichiro Taira , Keisuke Ono , Toshiaki Urabe , Yasunobu Nagataki , Yasushi Tanaka , Michitaka Sakurai , Yoshiharu Sugimoto
IPC分类号： B05D3/02
CPC分类号： C22C38/18 , B32B15/013 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/14 , C22C38/38 , C23C2/06 , C23C2/28
摘要： A galvannealed steel sheet is manufactured by preparing a hot-dip galvanized steel sheet, alloying the steel sheet, and controlling time and temperature for alloying thereof depending on Si and Al contents. The hot-dip galvanized steel sheet contains 0.05 to 0.30% C, 0.01 to 2.0% Si, 0.08 to 3.0% Mn, 0.003 to 0.1% P, 0 to 0.07% S, 0.01 to 2.5% Al, 0 to 0.007% N, by mass, and the balance being Fe and inevitable impurities. Alloying time and temperature are controlled by the formula [Si+Al≧1.5×10−7×t0.75×(T−465)3+0.117], where t is the total time (sec) of holding the sheet at 465° C. or more on alloying the coating layer thereon, and T is the average temperature (° C.) of the sheet during the total time t (sec) of holding the steel sheet at 465° C. or more on alloying the coating layer thereon.
摘要翻译：通过制备合金化钢板的热镀锌钢板，根据Si和Al含量控制其合金化的时间和温度来制造合金化热浸镀锌钢板。该热镀锌钢板含有0.05〜0.30％的C，0.01〜2.0％的Si，0.08〜3.0％的Mn，0.003〜0.1％的P，0〜0.07％的S，0.01〜2.5％的Al，0〜0.007％的N，，余量为Fe和不可避免的杂质。合金时间和温度由公式[Si + Al> = 1.5×10 -7 -7×0.75×（T-465）3 + 0.117]，其中t是在465℃或更高的时间将片材保持在其上的涂层上的总时间（秒），T是在总时间t内的片材的平均温度（℃）（℃）秒），使钢板在其上合金化时为465℃以上。

10. 发明授权

US5116435A Method for producing non-oriented steel sheets 失效
标题翻译：生产非面向钢板的方法
公开(公告)号：US5116435A
公开(公告)日：1992-05-26
申请号：US330926
申请日：1989-03-27
申请人： Akihiko Nishimoto , Yoshihiro Hosoya , Toshiaki Urabe
发明人： Akihiko Nishimoto , Yoshihiro Hosoya , Toshiaki Urabe
IPC分类号： B21B3/02 , C21D8/12 , C22C38/00 , C22C38/02 , C22C38/06
CPC分类号： C22C38/02 , C21D8/1222 , C22C38/06
摘要： A method for producing a non-oriented electrical steel sheet with precise thickness and homogeneous magnetic property comprising the steps of: making a steel ingot which has: 0.01 wt. % or less C, 0.003 wt. % or less N, 0.01 to 1.0 wt. % Mn, Al and Si satisfying, in wt. %, the formulas of: ##EQU1## provided that (Si %) represents the Si (wt. %) and (Al %) represents Al content (wt. %), and the balance being Fe and inevitable impurities to produce a steel slab; hot-rolling the slab at a finishing temperature of 700.degree. to 900.degree. C. into a steel strip and coiling the hot rolled strip; and cold-rolling the hot-rolled strip into a cold-rolled strip, followed by annealing the cold-rolled strip.

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