公开(公告)号：US5948183A

公开(公告)日：1999-09-07

申请号：US947388

申请日：1997-10-08

申请人： Susumu Okada ,  Masahiko Morita ,  Fumimaru Kawabata

发明人： Susumu Okada ,  Masahiko Morita ,  Fumimaru Kawabata

IPC分类号： C21D8/02 ,  C22C38/02 ,  C22C38/04 ,  C22C38/12 ,  C22C38/14

CPC分类号： C22C38/04 ,  C21D8/0226 ,  C22C38/02 ,  C22C38/12 ,  C22C38/14 ,  C21D2211/002 ,  C21D2211/005

摘要： The present invention provides a hot-rolled steel sheet having a low yield ratio, a high specific strength, and excellent toughness. The hot-rolled steel sheet comprises: 0.005 to less than 0.030 weight percent of carbon, 1.5 weight percent or less of silicon, 1.5 weight percent or less of manganese, 0.020 weight percent or less of phosphorus, 0.015 weight percent or less of sulfur, 0.005 to 0.10 weight percent of aluminum, 0.0100 weight percent or less of nitrogen, 0.0002 to 0.0100 weight percent of boron, at least one element selected from the group consisting of 0.20 weight percent or less of titanium and 0.25 weight percent or less of niobium in an amount to satisfy (Ti+Nb/2)/C.gtoreq.4, and balance iron and incidental impurities. The metal structure is selected from the group consisting of ferrite and bainitic ferrite. The amount of carbon dissolved in grains ranges from 1.0 to 4.0 ppm. The present invention also provides a method for producing a hot-rolled steel sheet. The method includes hot-rolling a steel slab containing the above components, cooling at a rate of between 5 to not more than 20.degree. C./sec., and then coiling at a temperature ranging from over 550.degree. C. to 700.degree. C.

摘要翻译： 本发明提供一种低屈服比，高比强度，优异的韧性的热轧钢板。 该热轧钢板包括：0.005〜小于0.030重量％的碳，1.5重量％以下的硅，1.5重量％以下的锰，0.020重量％以下的磷，0.015重量％以下的硫， 0.005〜0.10重量％的铝，0.0100重量％以下的氮，0.0002〜0.0100重量％的硼，至少一种选自钛的0.20重量％以下和0.25重量％以下的铌的元素 满足（Ti + Nb / 2）/ C> / = 4的量，并平衡铁和杂质。 金属结构选自铁素体和贝氏体铁素体。 溶解在谷物中的碳的量为1.0至4.0ppm。 本发明还提供一种热轧钢板的制造方法。 该方法包括对含有上述成分的钢板进行热轧，以不超过20℃/秒的速度冷却，然后在550℃〜700℃的温度下卷取 。

公开(公告)号：US06699338B2

公开(公告)日：2004-03-02

申请号：US10236907

申请日：2002-09-09

申请人： Tatsumi Kimura ,  Kazuhiko Shiotani ,  Fumimaru Kawabata ,  Keniti Amano

发明人： Tatsumi Kimura ,  Kazuhiko Shiotani ,  Fumimaru Kawabata ,  Keniti Amano

IPC分类号： C21D802

CPC分类号： C22C38/42 ,  C22C38/002 ,  C22C38/004 ,  C22C38/04 ,  C22C38/08 ,  C22C38/16 ,  C22C38/20 ,  C22C38/32 ,  C22C38/38 ,  C22C38/52 ,  C22C38/54

摘要： A steel material excellent in weathering resistance by defining the chemical ingredients in the steel each to a predetermined range and setting an ingredient parameter formula in accordance with the working circumstance thereby reducing the flow rust and, particularly, forming stable rust with good protective property even in a salty circumstance such as in coast districts is provided. Further, also considering the amount of A type inclusions and B type inclusions according to JIS G 0555, a steel material of excellent earthquake proofness and weathering proofness also including weld heat affect zone is provided.

摘要翻译： 通过将钢中的化学成分定义为规定范围，设定成为根据工作环境的成分参数公式的耐候性优异的钢材，由此减少流动锈，特别是即使在 提供海岸地区等咸况。 此外，还考虑到根据JIS G 0555的A型夹杂物和B型夹杂物的量，还提供了具有优异的抗震性和耐候性的钢材料，其也包括焊接热影响区域。

公开(公告)号：US06299710B1

公开(公告)日：2001-10-09

申请号：US09272572

申请日：1999-03-19

申请人： Noritsugu Itakura ,  Mitsuhiro Okatsu ,  Fumimaru Kawabata ,  Keniti Amano

发明人： Noritsugu Itakura ,  Mitsuhiro Okatsu ,  Fumimaru Kawabata ,  Keniti Amano

IPC分类号： C21D800

CPC分类号： C21D8/0226 ,  C21D8/0263 ,  C21D2211/002 ,  C22C38/04 ,  C22C38/12

摘要： A high-strength and high-toughness steel product having at least about 0.001% and less than about 0.030% by weight C, not more than about 0.60% by weight Si, from about 0.8% to 3.0% by weight Mn, from about 0.005 to 0.20% by weight Nb, from about 0.0003 to 0.0050% by weight B, and not more than about 0.005% by weight AL wherein at least 90% of the product has a bainite structure. A method of making this steel product is subject to less stringent production controls because of the nature of the composition.

摘要翻译： 具有至少约0.001％且小于约0.030％（重量）C，不超过约0.60％（重量）Si，约0.8％至3.0％（重量）的Mn，约0.005 至0.20重量％的Nb，约0.0003至0.0050重​​量％的B和不超过约0.005重量％的AL，其中至少90％的产物具有贝氏体组织。 由于组合物的性质，制造该钢产品的方法受到较不严格的生产控制。

公开(公告)号：US06537391B2

公开(公告)日：2003-03-25

申请号：US09878409

申请日：2001-06-12

申请人： Kengo Ishige ,  Tadashi Shibue ,  Tsutomu Kakinouchi ,  Fumimaru Kawabata ,  Osamu Tanigawa ,  Kiyoshi Uchida ,  Junichi Kudou

发明人： Kengo Ishige ,  Tadashi Shibue ,  Tsutomu Kakinouchi ,  Fumimaru Kawabata ,  Osamu Tanigawa ,  Kiyoshi Uchida ,  Junichi Kudou

IPC分类号： C23C3800

CPC分类号： C21D9/42 ,  C21D1/18 ,  C21D1/185 ,  C21D1/78

摘要： A steel has a tensile strength of 850 to 1700 MPa, a yield ratio of at most 80%, and a penetration border energy ratio of at least 2.0 relative to the penetration border energy of a reference steel JIS SS400 (corresponding to ASTM A36) of the same thickness. The steel can be produced by first effecting a heat treatment 1 on an unstable austenitic steel; then effecting, at least once, one or more or any combination of the heat treatment 1 and a heat treatment 2 on the steel; and then finally effecting the heat treatment 2 on the steel. Heat treatment 1 heats the unstable austenitic steel to at least the Ac3 transformation temperature and then water-cools the steel to a temperature below 350° C. Heat treatment 2 heats the steel to a temperature between Ac3 and Ac1 transformation temperatures and then water-cools the steel to a temperature below 350° C.

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：US6068712A

公开(公告)日：2000-05-30

申请号：US225503

申请日：1999-01-06

申请人： Yasuyashi Yamane ,  Kazuhiko Shiotani ,  Fumimaru Kawabata ,  Toshiyuki Hoshino ,  Keniti Amano ,  Kimihiro Nishimura

发明人： Yasuyashi Yamane ,  Kazuhiko Shiotani ,  Fumimaru Kawabata ,  Toshiyuki Hoshino ,  Keniti Amano ,  Kimihiro Nishimura

IPC分类号： C23C8/14 ,  C23C8/18 ,  C23C8/80

CPC分类号： C23C8/14 ,  C23C8/18

摘要： The invention provides a steel product having superior weathering which is coated with a rust layer containing 50 or more weight % of non-crystalline rust, a method of producing the steel product, and a method of forming weathering protective rust on a material surface of the steel product. A material of a steel product is placed in an atmosphere in which the dew point is kept constant and the temperature of the steel product material is repeatedly varied between a temperature range of 5.degree. C. or more higher than the dew point and a temperature range of 5.degree. C. or more lower than the dew point. Weathering protective rust is thereby formed on the material surface of the steel product and a steel product having superior weathering is obtained. Preferably, the atmosphere contains 15 to 50 volume % of oxygen gas, and the temperature of the steel product is varied at a rising rate of 0.1 to 2.degree. C./minute and a lowering rate of 0.01 to 2.degree. C./minute. Alternatively, a desired steel product can also be obtained by placing a material of the steel product in an atmosphere containing 15 to 50 volume % of oxygen gas, keeping constant the dew point in the atmosphere, and keeping the temperature of the steel product material in the atmosphere at a certain value in a temperature range between a temperature 5.degree. C. lower than the dew point and a temperature 20.degree. C. lower than the dew point; or by placing a material of the steel product in an atmosphere containing 15 to 50 volume % of oxygen gas, and forming and keeping a water film with a thickness not more than 500 .mu.m but not less than 50 .mu.m on a material surface of the steel product.

摘要翻译： 本发明提供一种具有优良耐候性的钢制品，其涂有含有50重量％以上非结晶锈的锈层，该钢制品的制造方法以及在该材料表面上形成耐候性锈蚀的方法 钢制品。 将钢材的材料放置在露点保持恒定的气氛中，并且钢产品材料的温度在5℃以上的温度范围内反复变化，并且温度范围 比露点低5℃或更高。 由此，在钢材的材料表面形成耐候性保护锈，得到耐候性优异的钢制品。 优选气氛含有15〜50体积％的氧气，钢产品的温度以0.1〜2℃/分钟的升高速度变化，0.01〜2℃/分钟的降低速度。 或者，也可以通过将钢材的材料放置在含有15〜50体积％的氧气的气氛中，使大气中的露点保持恒定，并将钢材的温度保持在 在一定温度范围内的气氛在比露点低5℃的温度和比露点低20℃的温度范围内; 或通过将钢制品的材料放置在含有15〜50体积％的氧气的气氛中，在其材料表面上形成并保持厚度不大于500μm〜50μm的水膜 钢铁产品。

公开(公告)号：US06358335B1

公开(公告)日：2002-03-19

申请号：US09515654

申请日：2000-02-29

申请人： Akio Ohmori ,  Fumimaru Kawabata ,  Keniti Amano

发明人： Akio Ohmori ,  Fumimaru Kawabata ,  Keniti Amano

IPC分类号： C22C3842

CPC分类号： C22C38/14 ,  C21D8/021 ,  C21D8/0226 ,  C22C38/04 ,  C22C38/12

摘要： N—V(nitrogen-vanadium) containing continuous casting slab with no surface cracks suitable for the manufacture of non-tempered high tensile steel materials has a tensile strength of 490 MPa or more and excellent toughness. A method of manufacturing non-tempered high tensile steel materials uses the casting slab as the raw material. Compatibility between the desired properties of the materials utilizing VN and inhibition of the surface cracks of test pieces, can be attained by controlling the steel composition and the relationship between each of components of the steel thereby controlling precipitation of VN and MnS. A continuous casting slab with no surface cracks contains C, Si, Mn, P, S, Al, V, N, Ti, B, Ca and REM each within a specified range, and satisfies an equation for the relationship between V and N and a relationship between Mn and S.

摘要翻译： 含有适合于制造非回火高强度钢材料的没有表面裂纹的连续铸造板的N-V（氮 - 钒）的拉伸强度为490MPa以上，韧性优异。 制造非回火高强度钢材的方法以铸坯为原料。 利用VN的材料的期望性质和试样的表面裂纹的抑制之间的相容性可以通过控制钢组成和钢各组分之间的关​​系来实现，从而控制VN和MnS的析出。 没有表面裂纹的连续铸造板坯在规定范围内含有C，Si，Mn，P，S，Al，V，N，Ti，B，Ca，REM，满足V与N之间的关系式 Mn和S之间的关系

公开(公告)号：US6007644A

公开(公告)日：1999-12-28

申请号：US257185

申请日：1999-02-25

申请人： Akio Ohmori ,  Tatsumi Kimura ,  Fumimaru Kawabata ,  Keniti Amano

发明人： Akio Ohmori ,  Tatsumi Kimura ,  Fumimaru Kawabata ,  Keniti Amano

IPC分类号： C22C38/00 ,  C21D8/00 ,  C22C38/04 ,  C22C38/12 ,  C22C38/14 ,  C22C38/58 ,  C21D7/13 ,  C22C38/06

CPC分类号： C21D8/00 ,  C22C38/04 ,  C22C38/12 ,  C22C38/14

摘要： A high-strength heavy-wall H-shaped steel is excellent in Z-direction toughness at the flange thickness center. The heavy-wall H-shaped steel is comprised of by weight from about 0.05 to 0.18% C, up to about 0.60% Si, from about 1.00% to about 1.80% Mn, up to about 0.020% P, under 0.004% S, from 0.016% to 0.050% Al, from 0.04% to 0. 15% V, and from 0.0070% to 0.0200% N, and one or more of from about 0.02% to about 0.60% Cu, from about 0.02% to about 0.60% Ni, from about 0.02% to about 0.50% Cr, and from about 0.01% to about 0.20% Mo; and the balance being Fe and incidental impurities. Also, (V.times.N)/S.gtoreq.0.150; the Ti content is within a range satisfying 0.002.ltoreq.Ti.ltoreq.1.38.times.N-8.59.times.10.sup.-4 ; Ceq (=C+Si/24+Mn/6+Ni/40+Cr/5+Mo/4+V/14) is within a range of from about 0.36 wt % to about 0.45 wt %, and the yield strength is at least 325 MPa.

摘要翻译： 高强度重型H型钢在法兰厚度中心的Z方向韧性优异。 重壁H型钢的重量为约0.05至0.18％C，至多约0.60％Si，约1.00％至约1.80％Mn，至多约0.020％P，0.004％S， 从0.016％至0.050％的Al，0.04％至0.15％的V，以及0.0070％至0.0200％的N，以及一种或多种约0.02％至约0.60％的Cu，约0.02％至约0.60％ Ni，约0.02％至约0.50％的Cr和约0.01％至约0.20％的Mo; 余量为Fe和杂质。 另外，（VxN）/ S> / = 0.150; Ti含量在满足0.002

公开(公告)号：US5989366A

公开(公告)日：1999-11-23

申请号：US816418

申请日：1997-03-14

申请人： Tohru Hayashi ,  Mitsuhiro Okatsu ,  Fumimaru Kawabata ,  Keniti Amano

发明人： Tohru Hayashi ,  Mitsuhiro Okatsu ,  Fumimaru Kawabata ,  Keniti Amano

IPC分类号： C21D8/00 ,  C21D8/02 ,  C22C38/00 ,  C22C38/04 ,  C22C38/14 ,  C22C38/58

CPC分类号： C22C38/04 ,  C21D8/0226

摘要： A method of manufacturing a thick steel product of high strength and high toughness having excellent weldability with minimal variation of material properties, comprises heating a steel raw material to the temperature of Ac.sub.3 to 1350.degree. C., hot rolling and then cooling at the cooling rate of 10.degree. C./sec. or less. The steel raw material has the following composition:C: 0.001-0.25 wt %;Mn: 1.0-3.0 wt %;Ti: 0.005-0.20 wt %;Nb: 0.005-0.20 wt %;B: 0.0003-0.0050 wt %; andAl: 0.01-0.100 wt %balance substantially Fe and incidental impurities. The composition has a transformation start temperature (Bs) of 670.degree. C. or less. Since the steel product obtained by the method has no variation in physical properties regardless of variation in cooling rate, it is possible to supply steel products of high strength and high toughness which have uniform microstructure and properties along their thickness direction and are excellent in weldability.

摘要翻译： 一种制造具有优异的焊接性和优异的材料特性的高强度和高韧性的粗钢产品的方法包括将钢原料加热至Ac 3至1350℃的温度，然后以冷却速度冷却，然后冷却 为10℃/秒。 或更少。 钢原料具有以下组成：C：0.001-0.25重量％; Mn：1.0-3.0重量％ Ti：0.005〜0.20重量％ Nb：0.005-0.20重量％ B：0.0003-0.0050重​​量％ 和Al：0.01-0.100重量％，基本上为Fe和附带的杂质。 组合物的转变开始温度（Bs）为670℃以下。 由于通过该方法获得的钢产品与冷却速度的变化无关，物理性质没有变化，因此可以提供具有均匀的组织和性能的厚度方向的高强度，高韧性的钢产品，并且焊接性优异。

公开(公告)号：US06521057B1

公开(公告)日：2003-02-18

申请号：US09929057

申请日：2001-08-15

申请人： Noritsugu Itakura ,  Mitsuhiro Okatsu ,  Fumimaru Kawabata ,  Keniti Amano

发明人： Noritsugu Itakura ,  Mitsuhiro Okatsu ,  Fumimaru Kawabata ,  Keniti Amano

IPC分类号： C22C3812

CPC分类号： C21D8/0226 ,  C21D8/0263 ,  C21D2211/002 ,  C22C38/04 ,  C22C38/12

摘要： A high-strength and high-toughness steel product having at least about 0.001% and less than about 0.030% by weight C, not more than about 0.60% by weight Si, from about 0.8 to 3.0% by weight Mn, from about 0.005 to 0.20% by weight Nb, from about 0.0003 to 0.0050% by weight B, and not more than about 0.005% by weight Al, wherein at least 90% of the product has a bainite structure. A method of making this steel product is subject to less stringent production controls because of the nature of the composition.

摘要翻译： 一种高强度和高韧性的钢产品，其具有至少约0.001％且小于约0.030％（重量）的C，不超过约0.60％（重量）的Si，约0.8至3.0％（重量）的Mn，约0.005至 0.20重量％的Nb，约0.0003〜0.0050重​​量％的B，不超过约0.005重量％的Al，其中至少90％的产物具有贝氏体结构。 由于组合物的性质，制造该钢产品的方法受到较不严格的生产控制。