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1. 发明授权

US06524726B1 Cold-rolled steel sheet and galvanized steel sheet, which are excellent in formability, panel shapeability, and dent-resistance, and method of manufacturing the same 有权
标题翻译：成形性，面板成型性，耐凹陷性优异的冷轧钢板和镀锌钢板及其制造方法
公开(公告)号：US06524726B1
公开(公告)日：2003-02-25
申请号：US09446708
申请日：1999-12-23
申请人： Fusato Kitano , Masaya Morita , Yoshihiro Hosoya , Takeshi Fujita , Tadashi Inoue , Masahiro Iwabuchi , Takeo Ishii
发明人： Fusato Kitano , Masaya Morita , Yoshihiro Hosoya , Takeshi Fujita , Tadashi Inoue , Masahiro Iwabuchi , Takeo Ishii
IPC分类号： C22C3812
CPC分类号： C21D8/0426 , C21D8/0436 , C21D8/0473 , C21D8/0478 , C22C38/004 , C22C38/04 , C22C38/12 , C23C2/02 , Y10T428/12799
摘要： Disclosed is a cold-rolled steel sheet excellent in formability, panel shapeability and dent-resistance, comprising 0.005 to 0.015% by weight of C, 0.01 to 0.2% by weight of Si, 0.2 to 1.5% by weight of Mn, 0.01 to 0.07% by weight of P, 0.006 to 0.015% by weight of S, 0.01 to 0.08% by weight of sol. Al, not higher than 0.004% by weight of N (N≦0.004%), not higher than 0.003% by weight of O (O≦0.003%), 0.04 to 0.23% by weight of Nb, 1.0≦(Nb %×12)/(C %×93)≦3.0, and a balance of Fe and unavoidable impurities, said cold-rolled steel sheet meeting the relationship given below: exp(&egr;)×(5.29×exp(&egr;)−4.19)≦&sgr;/&sgr;0.2≦exp(&egr;)×(5.64×exp(&egr;)−4.49) where 0.002
摘要翻译：公开了一种成型性，面板成型性和耐摔性优异的冷轧钢板，其含有0.005〜0.015重量％的C，0.01〜0.2重量％的Si，0.2〜1.5重量％的Mn，0.01〜0.07 P，0.006〜0.015重量％的S，0.01〜0.08重量％的溶胶。 Al，不高于0.004重量％的N（N <0.004％），不高于0.003重量％的O（O <0.003％），0.04〜0.23重量％的Nb，1.0 <=（Nb ％x12）/（C％x93）<= 3.0，余量为Fe和不可避免的杂质，所述冷轧钢板满足下列关系：其中0.002 <= 0.096，εi表示真应变σσ。 2表示0.2％的屈服应力，σ表示相对于epsi的真实应力。

2. 发明授权

US06689229B2 High strength cold rolled steel sheet and method for manufacturing the same 有权
标题翻译：高强度冷轧钢板及其制造方法
公开(公告)号：US06689229B2
公开(公告)日：2004-02-10
申请号：US10122860
申请日：2002-04-15
申请人： Takeshi Fujita , Fusato Kitano , Yoshihiro Hosoya , Toru Inazumi , Yuji Yamasaki , Masaya Morita , Yasunobu Nagataki , Kohei Hasegawa , Hiroshi Matsuda , Moriaki Ono
发明人： Takeshi Fujita , Fusato Kitano , Yoshihiro Hosoya , Toru Inazumi , Yuji Yamasaki , Masaya Morita , Yasunobu Nagataki , Kohei Hasegawa , Hiroshi Matsuda , Moriaki Ono
IPC分类号： C21D802
CPC分类号： C22C38/12 , C21D8/0226 , C21D8/0236 , C21D8/0273 , C22C38/002 , C22C38/004 , C22C38/02 , C22C38/04 , C22C38/06
摘要： A high strength cold rolled steel sheet consists essentially of 0.0040 to 0.01% C, not more than 0.05% Si, 0.1 to 1.0% Mn, 0.01 to 0.05% P, not more than 0.02% S, 0.01 to 0.1% sol.Al, not more than 0.004% N, 0.01 to 0.14% Nb, by weight, and a balance of substantially Fe and inevitable impurities, and having an n value of not less than 0.21 calculated from two points (1% and 10%) of nominal strain determined by the uniaxial tensile test, and a method for manufacturing the cold rolled steel sheet. The high strength cold rolled steel sheet has excellent combined formability, resistance to embrittlement during secondary operation, formability at welded portions, and anti-burring performance, and has a desirable surface appearance and uniformity of material in a coil, and thus can be desirably used for automobile exterior panels.
摘要翻译：高强度冷轧钢板主要由0.0040〜0.01％的C，不大于0.05％的Si，0.1〜1.0％的Mn，0.01〜0.05％的P，不大于0.02％的S，0.01〜0.1％的溶胶，Al，不超过0.004％的N，0.01〜0.14％的Nb，以及余量基本上为Fe和不可避免的杂质，并且由标称应变的两个点（1％和10％）计算出的n值不小于0.21 通过单轴拉伸试验确定，以及冷轧钢板的制造方法。高强度冷轧钢板具有优异的组合成形性，二次加工中的脆性耐受性，焊接部的成形性和抗起毛性，并且具有优选的线圈材料的表面外观和均匀性，因此可以理想地使用用于汽车外部面板。

3. 发明授权

US06494969B1 High strength cold rolled steel sheet and method for manufacturing the same 有权
公开(公告)号：US06494969B1
公开(公告)日：2002-12-17
申请号：US09631600
申请日：2000-08-03
申请人： Takeshi Fujita , Fusato Kitano , Yoshihiro Hosoya , Toru Inazumi , Yuji Yamasaki , Masaya Morita , Yasunobu Nagataki , Kohei Hasegawa , Hiroshi Matsuda , Moriaki Ono
发明人： Takeshi Fujita , Fusato Kitano , Yoshihiro Hosoya , Toru Inazumi , Yuji Yamasaki , Masaya Morita , Yasunobu Nagataki , Kohei Hasegawa , Hiroshi Matsuda , Moriaki Ono
IPC分类号： C22C3840
CPC分类号： C22C38/12 , C21D8/0226 , C21D8/0236 , C21D8/0273 , C22C38/002 , C22C38/004 , C22C38/02 , C22C38/04 , C22C38/06
摘要： The present invention relates to a very low C—Nb cold rolled steel sheet giving 340 to 440 MPa of tensile strength. For example, the cold rolled steel sheet consists essentially of 0.0040 to 0.01% C, not more than 0.05% Si, 0.1 to 1.0% Mn, 0.01 to 0.05% P, not more than 0.02% S, 0.01 to 0.1% sol.Al, not more than 0.004% N, 0.01 to 0.14% Nb, by weight, and balance of substantially Fe and inevitable impurities, and has not less than 0.21 of n value calculated from two points (1% and 10%) of nominal strain determined by the uniaxial tensile test, and relates to a method for manufacturing the cold rolled steel sheet. The present invention provides a high strength cold rolled steel sheet for automobile exterior panels having excellent combined formability, resistance to embrittlement during secondary operation, formability at welded portions, anti-burring performance, good surface appearance, and uniformity of material in a coil.

4. 发明授权

US06273971B1 Method of manufacturing cold rolled steel sheet excellent in resistance of natural aging and panel properties 有权
标题翻译：生产耐老化性和面板性能优异的冷轧钢板的方法
公开(公告)号：US06273971B1
公开(公告)日：2001-08-14
申请号：US09446702
申请日：2000-04-10
申请人： Fusato Kitano , Takeshi Fujita , Tadashi Inoue , Michihiro Hiasa , Takeo Ishii
发明人： Fusato Kitano , Takeshi Fujita , Tadashi Inoue , Michihiro Hiasa , Takeo Ishii
IPC分类号： C21D800
CPC分类号： C22C38/04 , C21D8/0226 , C21D8/0436 , C21D8/0473 , C21D8/0478 , C22C38/004 , C22C38/12 , C22C38/14
摘要： The present invention provides a method of manufacturing a cold rolled steel sheet and a hot-dip zinc-coated steel sheet having excellent surface properties, an excellent resistance to natural aging and an excellent dent resistance of panel and, thus, adapted to the manufacture of steel sheet for outer panels of vehicles. The method comprises the steps of preparing steel consisting of 0.005 to 0.012% by weight of C, 0.01 to 0.4% by weight of Si, 0.15 to 1.0% by weight of Mn, 0.01 to 0.08% by weight of P, at most 0.02% by weight of S, 0.01 to 0.1% by weight of sol. Al, at most 0.004% by weight of N, and at least one element selected from the group consisting of 0.01 to 0.2% by weight of Nb and 0.04 to 0.1% by weight of Ti, and satisfying the condition 1.2≦(12/93) (Nb%/C%)+(12/48) (Ti*%/C%)≦2.5, applying a hot rolling and a cold rolling to the steel, soaking the cold rolled steel sheet at T(° C.) meeting a formula Ac3≧T(° C.)≧157log(X)+737, and cooling the steel sheet after the soaking step at a cooling rate meeting a formula R(° C./sec)≦−35+162/X. Ti*% (noted above)=Ti%−(48/14)N%−(48/32)S%. When Ti* in the above equation is not larger than 0, Ti* is regarded as 0.
摘要翻译：本发明提供一种制造冷轧钢板和热浸镀锌钢板的方法，所述冷轧钢板和热浸镀锌钢板具有优异的表面性能，优异的耐老化性和优异的耐面板耐凹陷性，因此适用于制造车辆外板用钢板。该方法包括以下步骤：制备由0.005至0.012重量％的C，0.01至0.4重量％的Si，0.15至1.0重量％的Mn，0.01至0.08重量％的P，至多0.02重量％的S，0.01〜0.1重量％的溶胶。 Al，0.004重量％以下的N，和选自0.01〜0.2重量％的Nb和0.04〜0.1重量％的Ti中的至少一种元素，满足条件1.2 <=（12 / 93）（Nb％/ C％）+（12/48）（Ti *％/ C％）<= 2.5，对钢进行热轧和冷轧，将冷轧钢板在T 。）满足公式Ac3> = T（°C。）> = 157log（X）+737，并且在均热步骤后以符合公式R（℃/ sec） 35 + 162 / X。 Ti *％（上述）= Ti％ - （48/14）N％ - （48/32）S％。当上述等式中的Ti *不大于0时，Ti *被认为是0。

5. 发明授权

US5853903A Steel sheet for excellent panel appearance and dent resistance after panel-forming 失效
标题翻译：板材外观优异，板材成型后耐凹陷性好
公开(公告)号：US5853903A
公开(公告)日：1998-12-29
申请号：US847896
申请日：1997-04-28
申请人： Yoshihiro Hosoya , Fusato Kitano , Yasunobu Nagataki
发明人： Yoshihiro Hosoya , Fusato Kitano , Yasunobu Nagataki
IPC分类号： C22C38/12 , C22C38/14 , B32B15/01
CPC分类号： C22C38/12 , C22C38/14 , Y10T428/12868
摘要： A cold-rolled steel sheet or a zinc or zinc alloy layer coated steel sheet containing 0.0010 to 0.01 wt % of C and having a steel composition containing one or two kinds of 0.005 to 0.08 wt % of Nb and 0.01 to 0.07 wt % of Ti in the ranges given by {(12/93)Nb+(12/48)Ti*} .gtoreq.0.0005, 0.ltoreq.C-{(12/93)Nb+(12/48)Ti*}.ltoreq.0.0015, and Ti*=Ti-{(48/32)S+(48/14)N } , in which a bake hardenability BH f the steel sheet at 170.degree. C..times.20 min after 2% tensile prestrain is 10 to 35 MPa and the BH (MPa) and a yield strength YP (MPa) of the steel sheet satisfy the ranges given by BH.gtoreq.exp(-0.115.multidot.YP+23.0) and 0.67.multidot.BH+160.ltoreq.YP.ltoreq.-0.8.multidot.BH+280.
摘要翻译：含有0.0010〜0.01重量％的C，含有Nb或0.005〜0.08重量％的Nb和0.01〜0.07重量％的Ti的钢组合物的冷轧钢板或锌或锌合金层被覆钢板在{（12/93）Nb +（12/48）Ti *}> = 0.0005,0.0- =（（12/93）Nb +（12/48）Ti *} = 0.0015的范围内，Ti * = Ti-{（48/32）S +（48/14）N}，其中在2％拉伸预应变之后，170℃×120分钟钢板的烘烤淬透性BH f为10〜35MPa，钢板的BH（MPa）和屈服强度YP（MPa）满足由BH> / = exp（-0.115×YP + 23.0）和0.67×BH + 160

6. 发明授权

US06869691B2 High strength hot-dip galvanized steel sheet and method for manufacturing the same 有权
标题翻译：高强度热浸镀锌钢板及其制造方法
公开(公告)号：US06869691B2
公开(公告)日：2005-03-22
申请号：US10273052
申请日：2002-10-17
申请人： Yasunobu Nagataki , Fusato Kitano , Kentaro Sato , Masahiro Iwabuchi , Akira Gamou
发明人： Yasunobu Nagataki , Fusato Kitano , Kentaro Sato , Masahiro Iwabuchi , Akira Gamou
IPC分类号： C21D9/46 , C21D8/02 , C22C38/00 , C22C38/02 , C22C38/26 , C22C38/38 , C23C2/02 , C23C2/06 , C23C2/40 , B32B15/00 , C21D8/00
CPC分类号： C22C38/02 , C21D8/0205 , C21D8/0278 , C21D2211/002 , C21D2211/005 , C21D2211/008 , C22C38/26 , C22C38/38 , C23C2/02 , C23C2/06 , C23C2/40 , Y10T428/12799
摘要： The invention relates to a high strength hot-dip galvanized steel sheet consisting essentially of 0.03 to 0.25% C, 0.7% or less Si, 1.4 to 3.5% Mn, 0.05% or less P, 0.01% or less S, 0.05 to 1% Cr, 0.005 to 0.1% Nb, by mass, and balance of Fe, and being made of a composite structure of ferrite and secondary phase, and having an average grain size of the composite structure of 10 μm or smaller. Since the high strength hot-dip galvanized steel sheet of the present invention hardly induces softening at HAZ during welding, it is applicable to structural members of automobiles for “Tailor Welded Blanks” (TWB).
摘要翻译：本发明涉及基本上由0.03-0.25％C，0.7％或更少的Si，1.4到3.5％的Mn，0.05％或更少的P，0.01％或更少的S，0.05到1％ Cr，0.005〜0.1％Nb，余量为Fe，由铁素体和二次相的复合结构构成，复合结构的平均粒径为10μm以下。由于本发明的高强度热浸镀锌钢板在焊接时在HAZ几乎不发生软化，因此适用于“裁缝焊接坯料”（TWB）的汽车结构件。

7. 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。

8. 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。

9. 发明授权

US06440584B1 Hot-dip galvanized steel sheet and method for producing the same 有权
标题翻译：热浸镀锌钢板及其制造方法
公开(公告)号：US06440584B1
公开(公告)日：2002-08-27
申请号：US09953788
申请日：2001-09-17
申请人： Yasunobu Nagataki , Toshiaki Urabe , Fusato Kitano , Akio Kobayashi , Kunikazu Tomita , Shunsaku Node , Kozo Harada , Shogo Sato , Toru Inazumi
发明人： Yasunobu Nagataki , Toshiaki Urabe , Fusato Kitano , Akio Kobayashi , Kunikazu Tomita , Shunsaku Node , Kozo Harada , Shogo Sato , Toru Inazumi
IPC分类号： B32B1518
CPC分类号： C21D8/0263 , C21D8/0278 , C21D9/56 , C21D2211/005 , C21D2211/008 , C22C38/02 , C22C38/04 , C22C38/12 , C22C38/24 , C22C38/38 , C23C2/02 , C23C2/40 , Y10S428/939 , Y10T428/12799
摘要： A hot-dip galvanized steel sheet is produced by rough rolling a steel, finish rolling the rough rolled steel at a temperature of Ar3 point or more, coiling the finish rolled steel at a temperature of 700° C. or less, and hot-dip galvanizing the coiled steel at a pre-plating heating temperature of Ac1 to Ac3. A continuous hot-dip galvanizing operation is performed by soaking a pickled strip at a temperature of 750 to 850° C., cooling the soaked strip to a temperature range of 600° C. or less at a cooling rate of 1 to 50° C. per second, hot-dip galvanizing the cooled strip, and cooling the galvanized strip so that the residence time at 400 to 600° C. is within 200 seconds. The steel sheet has a structure consisting essentially of ferrite and martensite.
摘要翻译：热轧镀锌钢板通过粗轧制造，在Ar3点以上的温度下对粗轧制品进行精轧，在700℃以下的温度下卷取精轧辊，热浸镀锌钢板以预镀层加热温度Ac1〜Ac3镀锌钢卷。通过在750〜850℃的温度下浸渍酸洗条，进行连续热浸镀锌作业，将浸渍后的钢带以1〜50℃的冷却速度冷却至600℃以下的温度范围每秒，对冷却的条进行热浸镀锌，并冷却镀锌带，使得在400至600℃的停留时间在200秒内。钢板具有由铁素体和马氏体组成的结构。

10. 发明申请

US20060037677A1 High strength cold rolled steel sheet and method for manufacturing the same 审中-公开
标题翻译：高强度冷轧钢板及其制造方法
公开(公告)号：US20060037677A1
公开(公告)日：2006-02-23
申请号：US11050362
申请日：2005-02-03
申请人： Yoshihiko Ono , Fusato Kitano , Yasunobu Nagataki , Yasushi Tanaka , Hisanori Ando
发明人： Yoshihiko Ono , Fusato Kitano , Yasunobu Nagataki , Yasushi Tanaka , Hisanori Ando
IPC分类号： C21D8/00
CPC分类号： C22C38/06 , C21D8/0426 , C21D8/0436 , C21D8/0473 , C21D8/0478 , C22C38/02 , C22C38/04
摘要： The present invention relates to a high strength cold rolled steel sheet consisting of 0.015% or less of C, 1.5% or less of Si, 0.4 to 3% of Mn, 0.15% or less of P, 0.02% or less of S, 0.1 to 1% of sol.Al, 0.01% or less of N, 0.2% or less of Ti, by mass %, and the balance of Fe and inevitable impurities. In this steel sheet, 1≦([Ti]/48)/([C]/12+[N]/14) is satisfied, in which [M] represents the content of the element M. Since having the superior deep drawability and the TS of 340 to 590 MPa, the high strength cold rolled steel sheet of the present invention is preferably used for automobiles parts difficult to be press formed, such as a side outer panel and a door inner panel.
摘要翻译：本发明涉及由C：0.015％以下，Si：1.5％以下，Mn：0.4〜3％，P：0.15％以下，S：0.02％以下的高强度冷轧钢板至1％的Al，0.01％以下的N，0.2％以下的Ti，以质量％计，余量为Fe和不可避免的杂质。在该钢板中，满足1 <=（[Ti] / 48）/（[C] / 12 + [N] / 14），其中[M]表示元素M的含量。拉伸性和TS为340〜590MPa，本发明的高强度冷轧钢板优选用于难以压制成型的汽车零件，例如侧面板和门内板。

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