公开(公告)号：US06635127B2

公开(公告)日：2003-10-21

申请号：US09919946

申请日：2001-08-02

申请人： Jeffery W Doonan ,  Peter Ivan Unicomb ,  Robert K Armstrong

发明人： Jeffery W Doonan ,  Peter Ivan Unicomb ,  Robert K Armstrong

IPC分类号： C22C3814

CPC分类号： C21D8/0247 ,  C21D8/0226 ,  C21D9/60 ,  C21D2211/003 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/04 ,  C22C38/12 ,  C22C38/14 ,  Y02P10/253

摘要： Steel strapping and a method of manufacturing steel strapping are disclosed. The steel strapping has the following composition in wt % and a microstructure including a matrix of recovery-annealed cold worked ferrite containing martensite and carbides dispersed through the matrix. C: up to 0.2 Mn: up to 2.0 Si: 0.2-0.4 Ti: 0.025-0.045 V: 0.05-0.07 Cr: up to 0.25 Ni: up to 0.30 Mo: up to 0.10 N: up to 0.005 Cu: up to 0.20 Al: up to 0.08 Nb: up to 0.005 P: up to 0.035 S: up to 0.020 Balance  iron and incidental impurities.

摘要翻译： 公开了钢带和钢带的制造方法。 钢带具有以下重量％的组成，并且包括通过基体分散的含有马氏体和碳化物的回收退火冷加工铁素体基体的组织。

公开(公告)号：US06797231B2

公开(公告)日：2004-09-28

申请号：US10295032

申请日：2002-11-15

申请人： Naoki Matsui ,  Koji Watari ,  Takayuki Nishi ,  Toru Kato ,  Hitoshi Matsumoto ,  Hiroaki Tahira

发明人： Naoki Matsui ,  Koji Watari ,  Takayuki Nishi ,  Toru Kato ,  Hitoshi Matsumoto ,  Hiroaki Tahira

IPC分类号： C22C3814

CPC分类号： C22C38/02 ,  C21C7/06 ,  C22C38/002 ,  C22C38/04 ,  C22C38/60

摘要： The invention provides a steel for machine structural use, which is excellent in machinability, comprising, in percent by mass, C: 0.1-0.6%. Si: 0.01-2.0%, Mn: 0.2-2.0%, S: 0.005-0.2%, Al: not more than 0.009%, Ti: not less than 0.001% but less than 0.04%, Ca: 0.0001-0.01%, O (oxygen): 0.0010-0.01%, and N: not more than 0.02% and satisfying the following relations (1) to (3): n0/S (%)≧2500  (1) n1/n0≦0.1  (2) n2≧10  (3) where n0: total number of sulfide inclusions not smaller than 1 &mgr;m per mm2 of a cross section parallel to the direction of rolling (number/mm2); n1: number of MnS inclusions having not smaller than 1 &mgr;m and containing not less than 1.0% of Ca per mm2 of a cross section parallel to the direction of rolling (number/mm2); n2: number, per mm2 of a cross section parallel to the direction of rolling, of oxide inclusions having a specific composition comprising CaO—Al2O3—SiO2—TiO2 and having a diameter of not less than 1 &mgr;m (number/mm2).

摘要翻译： 本发明提供一种机械加工性优良的机械结构用钢，以质量％计含有C：0.1-0.6％。 Si：0.01〜2.0％，Mn：0.2〜2.0％，S：0.005〜0.2％，Al：0.009％以下，Ti：0.001％〜0.04％，Ca：0.0001-0.01％ （氧）：0.0010-0.01％，N：不大于0.02％，满足以下关系式（1）〜（3）：其中n0：不小于1mum / mm 2的硫化物夹杂物的总数 横截面与轧制方向平行（数/ mm 2）; n1：不小于1um的MnS夹杂物的数量，并且含有不小于平均于轧制方向的截面的每mm 2的Ca的1.0％（数/ mm 2）; n2：具有包含CaO-Al 2 O 3 -SiO 2 -TiO 2并且直径不小于1μm的特定组成的氧化物夹杂物的平​​均于轧制方向的横截面的mm 2的数量（数/ mm 2） 2>）。

公开(公告)号：US06228183B1

公开(公告)日：2001-05-08

申请号：US09123791

申请日：1998-07-28

申请人： Narasimha-Rao V. Bangaru ,  Jayoung Koo ,  Michael J. Luton ,  Clifford W. Petersen ,  Hiroshi Tamehiro ,  Hitoshi Asahi ,  Takuya Hara ,  Yoshio Terada

发明人： Narasimha-Rao V. Bangaru ,  Jayoung Koo ,  Michael J. Luton ,  Clifford W. Petersen ,  Hiroshi Tamehiro ,  Hitoshi Asahi ,  Takuya Hara ,  Yoshio Terada

IPC分类号： C22C3814

CPC分类号： C22C38/06 ,  C21D1/19 ,  C21D8/00 ,  C21D2211/002 ,  C21D2211/008 ,  C22C38/04 ,  C22C38/12 ,  C22C38/14

摘要： An ultra-high strength boron-containing steel having a tensile strength of at least about 900 MPa (130 ksi), a toughness as measured by Charpy V-notch impact test at −40° C. (−40° F.) of at least about 120 joules (90 ft-lbs), and a microstructure comprising predominantly fine-grained lower bainite, fine-grained lath martensite, or mixtures thereof, transformed from substantially unrecrystallized austenite grains and comprising iron and specified weight percentages of the additives: carbon, silicon, manganese, copper, nickel, niobium, vanadium, molybdenum, chromium, titanium, aluminum, calcium, Rare Earth Metals, and magnesium, is prepared by heating a steel slab to a suitable temperature; reducing the slab to form plate in one or more hot rolling passes in a first temperature range in which austenite recrystallizes; further reducing said plate in one or more hot rolling passes in a second temperature range below said first temperature range and above the temperature at which austenite begins to transform to ferrite during cooling; quenching said plate to a suitable Quench Stop Temperature; and stopping said quenching and allowing said plate to air cool to ambient temperature.

摘要翻译： 具有至少约900MPa（130ksi）拉伸强度的超高强度含硼钢，在-40℃（-40°F）下通过夏比V-缺口冲击试验测得的韧性 至少约120焦耳（90ft-lbs），以及由基本上未再结晶的奥氏体晶粒转化并且包含铁和特定重量百分比的添加剂的主要包含细粒度的下贝氏体，细粒状板条马氏体或其混合物的微观结构：碳 通过将钢坯加热到合适的温度来制备硅，锰，铜，镍，铌，钒，钼，铬，钛，​​铝，钙，稀土金属和镁， 在奥氏体重结晶的第一温度范围内，在一个或多个热轧道中将板坯还原成板; 在低于所述第一温度范围的第二温度范围内并且高于在冷却期间奥氏体开始转变为铁素体的温度的一个或多个热轧道中进一步减少所述板; 将所述板淬火至合适的淬火停止温度; 并停止所述淬火并允许所述板空气冷却至环境温度。

公开(公告)号：US06669789B1

公开(公告)日：2003-12-30

申请号：US09945185

申请日：2001-08-31

申请人： Daniel Geoffrey Edelman ,  Steven Leonard Wigman

发明人： Daniel Geoffrey Edelman ,  Steven Leonard Wigman

IPC分类号： C22C3814

CPC分类号： C21C7/0006 ,  C21C7/06 ,  C21C7/064 ,  C21D1/19 ,  C21D8/0215 ,  C21D8/0226 ,  C21D2211/005 ,  C22C38/04 ,  C22C38/14

摘要： A composition and method of making a high-strength low-alloy hot-rolled steel sheet, strip, or plate bearing titanium as the principal or only microalloy strengthening element. The steel is substantially ferritic and has a microstructure that is at least 20% acicular ferrite. The steel has a minimum yield strength of at least 345 MPa (50 ksi) and even over 621 MPa (90 ksi) adding titanium as the lone microalloy element for strengthening, with elongation of 15% and more. Addition of vanadium, niobium, or a combination thereof can result in yield strengths exceeding 621 MPa (90 ksi). Effective titanium content, being the content of titanium in the steel not in the form of nitrides, oxides, or sulfides, is in the range of 0.01 to 0.12% by weight. The manufacturing process includes continuously casting a thin slab and reducing the slab thickness using thermomechanical controlled processing, including dynamic recrystallization controlled rolling.

摘要翻译： 制造高强度低合金热轧钢板，带状或带有钛作为主要或仅有微合金强化元素的板的组合物和方法。 钢基本上是铁素体的，并且具有至少20％针状铁素体的微结构。 钢的最小屈服强度至少为345MPa（50ksi），甚至超过621MPa（90ksi），作为用于强化的单一微合金元素钛，其伸长率为15％以上。 添加钒，铌或其组合可导致屈服强度超过621MPa（90ksi）。 作为不是氮化物，氧化物或硫化物形式的钢中钛的含量的有效钛含量在0.01〜0.12重量％的范围内。 制造工艺包括使用热机械控制加工（包括动态再结晶控制轧制）连续铸造薄板坯并减少板坯厚度。

公开(公告)号：US06666932B2

公开(公告)日：2003-12-23

申请号：US10108691

申请日：2002-03-28

申请人： Yoshimasa Funakawa ,  Tsuyoshi Shiozaki ,  Kunikazu Tomita ,  Takanobu Saito ,  Hiroshi Nakata ,  Kaoru Sato ,  Minoru Suwa ,  Tetsuo Yamamoto ,  Yasuhiro Murao ,  Eiji Maeda

发明人： Yoshimasa Funakawa ,  Tsuyoshi Shiozaki ,  Kunikazu Tomita ,  Takanobu Saito ,  Hiroshi Nakata ,  Kaoru Sato ,  Minoru Suwa ,  Tetsuo Yamamoto ,  Yasuhiro Murao ,  Eiji Maeda

IPC分类号： C22C3814

CPC分类号： C23C2/40 ,  B32B15/013 ,  C21D8/0226 ,  C21D2211/004 ,  C21D2211/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/12 ,  C22C38/14 ,  Y10T428/12799

摘要： The present invention relates to a high strength hot rolled steel sheet containing 0.15% or less C, 0.02 to 0.35% Ti, and 0.05 to 0.7% Mo by weight percentage and consisting essentially of a matrix of ferrite structure single phase and fine precipitates with a grain size of smaller than 10 nm dispersed in the matrix, for example, a high strength hot rolled steel sheet which consists essentially of 0.06% or less C, 0.5% or less Si, 0.5 to 2.0% Mn, 0.06% or less P, 0.005% or less S, 0.1% or less Al, 0.006% or less N, 0.02 to 0.10% Ti, 0.05 to 0.6% Mo by weight percentage, and the balance being Fe, wherein fine precipitates with a grain size of smaller than 10 nm are dispersed in a matrix of ferrite structure single phase at a number per unit volume of 5×104/&mgr;m3 or higher. This steel sheet, which has tensile strength of not lower than 550 MPa, high elongation and excellent stretch flangeability, is suitable for intricately shaped automotive chassis parts such as a suspension arm.

摘要翻译： 本发明涉及含有0.15％以下的C，0.02〜0.35％Ti和0.05〜0.7％Mo的高强度热轧钢板，主要由铁素体结构单相和微细析出物组成， 分散在基体中的小于10nm的晶粒尺寸，例如基本上由0.06％以下的C，0.5％以下的Si，0.5〜2.0％的Mn，0.06％以下的P组成的高强度热轧钢板， 0.005％以下的S，0.1％以下的Al，0.006％以下的N，0.02〜0.10％的Ti，0.05〜0.6％的Mo，余量为Fe，其中微细析出的晶粒尺寸小于10 nm以5×10 4 / m 3以上的单位体积数分散在铁素体结构单相的基体中。 该拉伸强度不低于550MPa，伸长率高，拉伸凸缘性优异的钢板适用于悬挂臂等复杂形状的汽车底盘部件。

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。

公开(公告)号：US06579385B2

公开(公告)日：2003-06-17

申请号：US09931093

申请日：2001-08-17

申请人： Hiroshi Yaguchi ,  Yosuke Shindo ,  Takehiro Tsuchida ,  Takahiro Kudou ,  Masato Kaiso ,  Masami Somekawa

发明人： Hiroshi Yaguchi ,  Yosuke Shindo ,  Takehiro Tsuchida ,  Takahiro Kudou ,  Masato Kaiso ,  Masami Somekawa

IPC分类号： C22C3814

CPC分类号： C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/60

摘要： Free machining steel for use in machine structures capable of stably and reliably providing excellent machinability (chip disposability and tool life) and mechanical characteristics (transverse direction toughness) comparable, in a Pb free state, with existent Pb-added steels the machining steel being manufactured so as to contain 0.0005 to 0.02 mass % of Mg and provide a distribution index F1 for the sulfide particles defined by the following equation (1) of 0.4 to 0.65 or a distribution index for the sulfide particles defined by the following equation (2) of 1 to 2.5: F1=X1/(A/n)½  (1), or F2=&sgr;F/X2  (2) as described in the specification.

摘要翻译： 用于能够稳定可靠地提供优良机械加工性（切屑可处理性和刀具寿命）和机械特性（横向韧性）的机器结构的自由加工钢在无铅状态下与现有的Pb添加钢相当，制造的加工钢 含有0.0005〜0.02质量％的Mg，并且由下式（1）定义的硫化物粒子的分布指数F1为0.4〜0.65，或者由下述式（2）定义的硫化物粒子的分布指数为 1至2.5：如说明书中所述。

公开(公告)号：US06364968B1

公开(公告)日：2002-04-02

申请号：US09586421

申请日：2000-06-02

申请人： Eiko Yasuhara ,  Akio Tosaka ,  Osamu Furukimi ,  Takao Uchiyama ,  Nobuo Yamada

发明人： Eiko Yasuhara ,  Akio Tosaka ,  Osamu Furukimi ,  Takao Uchiyama ,  Nobuo Yamada

IPC分类号： C22C3814

CPC分类号： C21D1/20 ,  C21D8/0226 ,  C21D2211/002 ,  C22C38/04 ,  C22C38/12 ,  C22C38/14

摘要： The invention provides a thin high-strength hot-rolled steel sheet with a thickness of not more than 3.5 mm which has excellent stretch flangeability and high uniformity in both shape and mechanical properties of the steel sheet, as well as a method of producing the hot-rolled steel sheet. A slab containing C: 0.05-0.30 wt %, Si: 0.03-1.0 wt %, Mn: 1.5-3.5 wt %, P: not more than 0.02 wt %, S: not more than 0.005 wt %, Al: not more than 0.150 wt %, N: not more than 0.0200 wt %, and one or two of Nb: 0.003-0.20 wt % and Ti: 0.005-0.20 wt % is heated at a temperature of not higher than 1200° C. The slab is hot-rolled at a finish rolling end temperature of not lower than 800° C., preferably at a finish rolling start temperature of 950-1050° C. A hot-rolled sheet is started to be cooled within two seconds after the end of the rolling, and then continuously cooled down to a coiling temperature at a cooling rate of 20-150° C./sec. The hot-rolled sheet is coiled at a temperature of 300-550° C., preferably in excess of 400° C. A fine bainite structure is obtained in which the mean grain size is not greater than 3.0 &mgr;m, the aspect ratio is not more than 1.5, and preferably the maximum size of the major axis is not greater than 10 &mgr;m.

摘要翻译： 本发明提供一种厚度不大于3.5mm的薄的高强度热轧钢板，其在钢板的形状和机械性能方面具有优异的拉伸凸缘性和高均匀性，以及制造热 卷钢板 含有C：0.05-0.30重量％，Si：0.03-1.0重量％，Mn：1.5-3.5重量％，P：不大于0.02重量％的S：不大于0.005重量％的Al：不大于 0.150重量％，N：不大于0.0200重量％，Nb：0.003-0.20重量％和Ti：0.005-0.20重量％中的一个或两个在不高于1200℃的温度下加热。 在终轧温度不低于800℃，优选在950-1050℃的精轧起始温度下进行。在轧制结束后2秒钟内开始冷轧热轧板 ，然后以20-150℃/秒的冷却速度连续冷却至卷取温度。 热轧板在300-550℃，优选超过400℃的温度下卷绕。得到平均粒径不大于3.0μm的细贝氏体组织，纵横比不是 大于1.5，优选长轴的最大尺寸不大于10um。

公开(公告)号：US06344093B1

公开(公告)日：2002-02-05

申请号：US09566989

申请日：2000-05-09

申请人： Akio Ohmori ,  Fumimaru Kawabata ,  Keniti Amano

发明人： Akio Ohmori ,  Fumimaru Kawabata ,  Keniti Amano

IPC分类号： C22C3814

CPC分类号： C22C38/14 ,  C21D2211/004 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/04 ,  C22C38/12

摘要： A high tensile strength steel product for high heat input welding having excellent toughness in the heat-affected zone and having a tensile strength of at least 490 MPa contains, in terms of percent by weight, from about 0.05% to about 0.18% of C, 0.6% or less of Si, from about 0.80% to about 1.80% of Mn, 0.005% or less of Al, 0.030% or less of P, 0.004% or less of S, 0.005% or less of Nb, from about 0.04% to about 0.15% of V, from about 0.0050% to about 0.00150% of N, and from about 0.010% to about 0.050% of Ti, the ratio of the Ti content to the Al content, Ti/Al, satisfying 5.0 or more, and further contains at least one of from about 0.0010% to about 0.0100% of Ca and from about 0.0010% to about 0.0100% of REM, and the balance being Fe and incidental impurities. In the steel product, oxide inclusions containing, in terms of percent by weight, 20% to about 95% of a titanium oxide, 70% or less of Al2O3, 5% to about 50% in total of at least one of calcium oxide and a REM oxide, and 15% or less of MnO are dispersed.

摘要翻译： 用于高热输入焊接的高抗拉强度钢产品在热影响区具有优异的韧性并且拉伸强度至少为490MPa，以重量百分比计包含约0.05％至约0.18％的C， 0.6％以下的Si，约0.80％〜约1.80％的Mn，0.005％以下的Al，0.030％以下的P，0.004％以下的S，0.005％以下的Nb，约0.04％ 至约0.15％的V，约0.0050％至约0.00150％的N和约0.010％至约0.050％的Ti，Ti含量与Al含量的比例Ti / Al满足5.0以上， 并且还包含约0.0010％至约0.0100％的Ca和约0.0010％至约0.0100％的REM中的至少一种，余量为Fe和附带的杂质。 在钢产品中，氧化物夹杂物含有以重量百分比计，20％至约95％的氧化钛，70％或更少的Al 2 O 3，5％至约50％的总量中的至少一种氧化钙和 REM氧化物和15％以下的MnO分散。

公开(公告)号：US06203630B1

公开(公告)日：2001-03-20

申请号：US09616362

申请日：2000-07-13

申请人： Yasushi Matsumura ,  Yutaka Kurebayashi ,  Sadayuki Nakamura

发明人： Yasushi Matsumura ,  Yutaka Kurebayashi ,  Sadayuki Nakamura

IPC分类号： C22C3814

CPC分类号： C22C38/50 ,  C22C38/04 ,  C22C38/06 ,  C22C38/54

摘要： A steel product contains, by mass %, C: 0.45 to 0.60%, Si: 0.01 to 0.15%, Mn: 0.20 to 0.60%, S: 0.012% or lower, Al: 0.015 to 0.040%, Ti: 0.005 to 0.050%, B: 0.0005 to 0.0050%, N: 0.010% or lower, O: 0.0010% or lower, and balance being Fe and unavoidable impurities. Limitations are provided to allowable maximum sizes per each sort of contained non-metallic inclusions and the number per unit area thereof. This steel may contains one kind or two kinds or more of Cr: 1.00% or lower, Mo: 0.50% or lower and Ni: 1.50 or lower.

摘要翻译： 钢材以质量％计含有C：0.45〜0.60％，Si：0.01〜0.15％，Mn：0.20〜0.60％，S：0.012％以下，Al：0.015〜0.040％，Ti：0.005〜0.050％ ，B：0.0005〜0.0050％，N：0.010％以下，O：0.0010％以下，余量为Fe和不可避免的杂质。 限制被提供给每种包含的非金属夹杂物的允许最大尺寸及其每单位面积的数量。 该钢可以含有Cr：1.00％以下，Mo：0.50％以下，Ni：1.50以下的一种以上。