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11. 发明授权

US06514359B2 Heat resistant steel 有权
标题翻译：耐热钢
公开(公告)号：US06514359B2
公开(公告)日：2003-02-04
申请号：US09818830
申请日：2001-03-28
申请人： Kaori Kawano
发明人： Kaori Kawano
IPC分类号： C22C3824
CPC分类号： C22C38/22 , C21D2211/003 , C21D2211/004 , C22C38/24 , C22C38/26
摘要： A heat resistant steel which comprises, by mass %, C: 0.01-0.25%, Cr: 0.5-8%, V: 0.05-0.5%, Si: not more than 0.7%, Mn: not more than 1%, Mo: not more than 2.5%, W: not more than 5%, Nb: not more than 0.2%, N: not more than 0.1%, Ti: not more than 0.1%, Ta: not more than 0.2%, Cu: not more than 0.5%, Ni: not more than 0.5%, Co: not more than 0.5%, B: not more than 0.1%, Al: not more than 0.05%, Ca: not more than 0.01%, Mg: not more than 0.01%, Nd: not more than 0.01%, with Fe and impurities accounting for the balance, the chemical composition of which satisfies the relations C−0.06×(Mo+0.5 W)≧0.01 and Mn+0.69×log(Mo+0.5 W+0.01)≦0.60 wherein the symbols for elements represent the contents, on the % by mass basis, of the elements in the steel, and in which, among precipitates inside grains, precipitates having an average diameter of not more than 30 nm are present at a density of not less than 1/&mgr;m3.
摘要翻译：一种耐热钢，以质量％计含有C：0.01-0.25％，Cr：0.5-8％，V：0.05-0.5％，Si：不大于0.7％，Mn：不大于1％，Mo：不大于2.5％，W：不大于5％，Nb：不大于0.2％，N：不大于0.1％，Ti：不大于0.1％，Ta：不大于0.2％，Cu：不大于 0.5％以下，Ni：不大于0.5％，Co：不大于0.5％，B：不大于0.1％，Al：不大于0.05％，Ca：不大于0.01％，Mg：不大于0.01 ％，Nd：不大于0.01％，Fe和杂质占平衡，其化学成分满足关系C-0.06x（Mo + 0.5W）> 0.01和Mn + 0.69xlog（Mo + 0.5W +0.01）<= 0.60其中元素符号表示钢中的元素的质量％，其中在晶粒内的析出物中，平均直径不大于30nm的析出物为以不小于1 / mum3的密度存在。

12. 发明申请

US20130269838A1 HOT-ROLLED, COLD ROLLED, AND PLATED STEEL SHEET HAVING IMPROVED UNIFORM AND LOCAL DUCTILITY AT A HIGH STRAIN RATE 有权
标题翻译：热轧，冷轧和镀层钢板具有改进的均匀性和局部强度在高应变率
公开(公告)号：US20130269838A1
公开(公告)日：2013-10-17
申请号：US13879074
申请日：2010-10-18
申请人： Kaori Kawano , Yasuaki Tanaka , Toshiro Tomida
发明人： Kaori Kawano , Yasuaki Tanaka , Toshiro Tomida
IPC分类号： C22C38/38 , C22C38/00 , C22C38/24 , C22C38/26 , C21D8/02 , C22C38/28
CPC分类号： C21D8/0221 , C21D8/04 , C21D8/0426 , C21D8/0436 , C21D8/0463 , C21D9/46 , C21D9/48 , C21D2211/001 , C21D2211/002 , C21D2211/005 , C21D2211/008 , C22C38/001 , C22C38/02 , C22C38/06 , C22C38/24 , C22C38/26 , C22C38/28 , C22C38/38 , C23C2/02 , C23C2/28
摘要： A multi-phase hot-rolled steel sheet has a metallurgical structure having a main phase of ferrite with an average grain diameter of at most 3.0 μm and a second phase including at least one of martensite, bainite, and austenite. In the surface layer, the average grain diameter of the second phase is at most 2.0 μm, the difference (ΔnHav) between the average nanohardness of the main phase (nHαav) and the average nanohardness of the second phase (nH2nd av) is 6.0-10.0 GPa, the difference (ΔσnH) of the standard deviation of the nanohardness of the second phase from the standard deviation of the nanohardness of the main phase is at most 1.5 GPa, and in the central portion, the difference (ΔnHav) between the average nanohardnesses is at least 3.5 GPa to at most 6.0 GPa and the difference (ΔσnH) between the standard deviations of the nanohardnesses is at least 1.5 GPa.
摘要翻译：多相热轧钢板具有冶金结构，其具有平均粒径为3.0μm以下的铁素体的主相，以及包含马氏体，贝氏体和奥氏体中的至少一种的第二相。在表面层中，第二相的平均粒径为2.0μm以下，主相的平均纳米硬度（nHalphaav）与第二相的平均纳米硬度（nH2nd av）之间的差（DeltanHav）为6.0〜 10.0 GPa，第二相纳米硬度的标准偏差与主相纳米硬度的标准偏差的差值（DeltasigmanH）为1.5GPa以下，中心部分的平均值（DeltanHav）纳米硬度至少为3.5GPa至至多6.0GPa，并且纳米硬度的标准偏差之间的差异（DeltasigmanH）至少为1.5GPa。

13. 发明申请

US20110162760A1 METHOD OF PRODUCING COLD-ROLLED STEEL SHEET 有权
标题翻译：生产冷轧钢板的方法
公开(公告)号：US20110162760A1
公开(公告)日：2011-07-07
申请号：US13046869
申请日：2011-03-14
申请人： Toshirou TOMIDA , Norio Imai , Mitsuru Yoshida , Kaori Kawano , Masayuki Wakita , Tamotsu Toki , Masanori Yasuyama , Hitomi Nishibata
发明人： Toshirou TOMIDA , Norio Imai , Mitsuru Yoshida , Kaori Kawano , Masayuki Wakita , Tamotsu Toki , Masanori Yasuyama , Hitomi Nishibata
IPC分类号： C21D8/02 , C21D11/00 , C21D6/00
CPC分类号： C23C2/40 , B32B15/012 , B32B15/013 , C21D8/0205 , C21D8/0226 , C21D8/0263 , C21D8/0405 , C21D8/0463 , C21D9/46 , C21D9/50 , C21D2201/03 , C21D2211/002 , C21D2211/005 , C21D2211/009 , C22C18/04 , C22C38/02 , C22C38/04 , C22C38/06 , C23C2/06 , C23C2/28
摘要： A steel sheet excellent in mechanical strength, workability and thermal stability and suited for use as a raw material in such fields of manufacturing automobiles, household electric appliances and machine structures and of constructing buildings, and a manufacturing method thereof are provided.The steel sheet is a hot-rolled steel sheet of carbon steel or low-alloy steel, the main phase of which is ferrite, and is characterized in that the average ferrite crystal grain diameter D (μm) at the depth of ¼ of the sheet thickness from the steel sheet surface satisfies the relations respectively defined by the formulas (1) and (2) given below and the increase rate X (μm/min) in average ferrite crystal grain diameter at 700° C. at the depth of ¼ of the sheet thickness from the steel sheet surface and said average crystal grain diameter D (μm) satisfy the relation defined by the formula (3) given below: 1.2≦D≦7 formula (1) D≦2.7+5000/(5+350·C+40·Mn)2 formula (2) D·X≦0.1 formula (3) wherein C and Mn represent the contents (in % by mass) of the respective elements in the steel.
摘要翻译：提供了机械强度，可加工性和热稳定性优异且适用于制造汽车，家用电器和机器结构以及建筑物的领域中的原料的钢板及其制造方法。该钢板是碳素钢或低合金钢的热轧钢板，其主相是铁素体，其特征在于，在片材的1/4深度处的平均铁素体晶粒直径D（μm）从钢板表面的厚度满足下面给出的式（1）和（2）所定义的关系，并且在700℃的平均铁素体晶粒直径的增加速率X（μm/ min）在深度为1/4 钢板表面的平均厚度和所述平均晶粒直径D（μm）满足以下公式（3）所定义的关系：1.2＆nlE; D＆nlE; 7式（1）D＆nlE; 2.7 + 5000 /（5+ 350·C + 40·Mn）2式（2）D·X＆nlE; 0.1式（3）其中C和Mn表示钢中各元素的含量（质量％）。

14. 发明授权

US07731808B2 Hot-rolled steel sheet and cold-rolled steel sheet and manufacturing method thereof 有权
标题翻译：热轧钢板和冷轧钢板及其制造方法
公开(公告)号：US07731808B2
公开(公告)日：2010-06-08
申请号：US12068045
申请日：2008-02-01
申请人： Toshirou Tomida , Norio Imai , Mitsuru Yoshida , Kaori Kawano , Masayuki Wakita , Tamotsu Toki , Masanori Yasuyama , Hitomi Nishibata
发明人： Toshirou Tomida , Norio Imai , Mitsuru Yoshida , Kaori Kawano , Masayuki Wakita , Tamotsu Toki , Masanori Yasuyama , Hitomi Nishibata
IPC分类号： C22C38/00 , C21D8/02 , C21D8/04
CPC分类号： C23C2/40 , B32B15/012 , B32B15/013 , C21D8/0205 , C21D8/0226 , C21D8/0263 , C21D8/0405 , C21D8/0463 , C21D9/46 , C21D9/50 , C21D2201/03 , C21D2211/002 , C21D2211/005 , C21D2211/009 , C22C18/04 , C22C38/02 , C22C38/04 , C22C38/06 , C23C2/06 , C23C2/28
摘要： A steel sheet excellent in mechanical strength, workability and thermal stability and suited for use as a raw material in such fields of manufacturing automobiles, household electric appliances and machine structures and of constructing buildings, and a manufacturing method thereof are provided. The steel sheet is a hot-rolled steel sheet of carbon steel or low-alloy steel, the main phase of which is ferrite, and is characterized in that the average ferrite crystal grain diameter D (μm) at the depth of ¼ of the sheet thickness from the steel sheet surface satisfies the relations respectively defined by the formulas (1) and (2) given below and the increase rate X (μm/min) in average ferrite crystal grain diameter at 700° C. at the depth of ¼ of the sheet thickness from the steel sheet surface and said average crystal diameter D (μm) satisfy the relation defined by the formula (3) given below: 1.2≦D≦7 formula (1) D≦2.7+5000/(5+350·C+40·Mn)2 formula (2) D·X≦0.1 formula (3) wherein C and Mn represent the contents (in % by mass) of the respective elements in the steel.
摘要翻译：提供了机械强度，可加工性和热稳定性优异且适用于制造汽车，家用电器和机器结构以及建筑物的领域中的原料的钢板及其制造方法。该钢板是碳素钢或低合金钢的热轧钢板，其主相是铁素体，其特征在于，在片材的1/4深度处的平均铁素体晶粒直径D（μm）从钢板表面的厚度满足下面给出的式（1）和（2）所定义的关系，并且在700℃的平均铁素体晶粒直径的增加速率X（μm/ min）在深度为1/4 钢板表面的板厚和所述平均晶体直径D（μm）满足以下公式（3）定义的关系：1.2＆nlE; D＆nlE; 7式（1）D＆nlE; 2.7 + 5000 /（5 + 350 ·C + 40·Mn）2式（2）D·X＆nlE; 0.1式（3）其中C和Mn表示钢中各元素的含量（质量％）。

15. 发明授权

US10538823B2 Steel sheet and a method for its manufacture 有权
公开(公告)号：US10538823B2
公开(公告)日：2020-01-21
申请号：US13699845
申请日：2010-05-27
申请人： Yasuaki Tanaka , Toshiro Tomida , Kaori Kawano
发明人： Yasuaki Tanaka , Toshiro Tomida , Kaori Kawano
IPC分类号： C22C38/00 , C22C38/02 , C22C38/06 , C22C38/28 , C22C38/38 , C22C38/22 , C22C38/24 , C22C38/26 , C21D8/02
摘要： A high-strength steel sheet has a chemical composition comprising C: 0.05-0.20%, Si: 0.02-3.0%, Mn: 0.5-3.0%, P: at most 0.5%, S: at most 0.05%, Cr: 0.05-1.0%, sol. Al: 0.01-1.0%, one or more elements selected from the group consisting of Ti, Nb, Mo, V, and W: a total of 0.002-0.03%, and a remainder of Fe and impurities. The sheet has an average grain diameter of ferrite of at most 3.0 μm at least in a region of 100-200 μm in the sheet thickness direction from the surface of the steel sheet. The average spacing in the sheet thickness direction of the remaining structure in this region is at most 3.0 μm. Mechanical properties include at least 750 MPa tensile strength and at least 13,000 MPa·% (tensile strength×elongation).

16. 发明授权

US10041158B2 Multi-phase hot-rolled steel sheet having improved dynamic strength and a method for its manufacture 有权
公开(公告)号：US10041158B2
公开(公告)日：2018-08-07
申请号：US13643696
申请日：2011-04-07
申请人： Yasuaki Tanaka , Toshiro Tomida , Kaori Kawano
发明人： Yasuaki Tanaka , Toshiro Tomida , Kaori Kawano
IPC分类号： C22C38/58 , C22C38/00 , C22C38/38 , C22C38/04 , C22C38/28 , C22C38/02 , C21D8/02 , C21D6/00 , C21D9/46 , C22C38/06 , C22C38/20 , C22C38/22 , C22C38/24 , C22C38/40 , C22C38/50
摘要： A multi-phase hot-rolled steel sheet having improved strength in an intermediate strain rate region has a chemical composition comprising, in mass percent, C: 0.07-0.2%, Si+Al: 0.3-1.5%, Mn: 1.0-3.0%, P: at most 0.02%, S: at most 0.005%, Cr: 0.1-0.5%, N: 0.001-0.008%, at least one of Ti: 0.002-0.05% and Nb: 0.002-0.05%, and a remainder of Fe and impurities. The area fraction of ferrite is 7-35%, the grain diameter of ferrite is in the range of 0.5-3.0 μm, and the nanohardness of ferrite is in the range of 3.5-4.5 GPa. A second phase which is the remainder other than ferrite contains martensite and bainitic ferrite and/or bainite. The average nanohardness of the second phase is 5-12 GPa, and the second phase contains a high-hardness phase of 8-12 GPa with an area fraction of 5-35% based on the overall structure.

17. 发明授权

US08404060B2 Method for manufacturing hot-rolled sheet having fine-grained ferrite, and hot-rolled sheet 有权
标题翻译：具有细粒铁素体的热轧板的制造方法和热轧板
公开(公告)号：US08404060B2
公开(公告)日：2013-03-26
申请号：US12525094
申请日：2007-02-02
申请人： Suguhiro Fukushima , Manabu Eto , Tamotsu Sasaki , Kaori Kawano , Masayuki Wakita
发明人： Suguhiro Fukushima , Manabu Eto , Tamotsu Sasaki , Kaori Kawano , Masayuki Wakita
IPC分类号： C21D8/00
CPC分类号： C22C38/06 , B21B1/38 , B21B3/00 , C21D8/02 , C22C38/001 , C22C38/02 , C22C38/04
摘要： A method for manufacturing a hot-rolled sheet is provided, wherein the method attains grain refinement of the steel sheet containing C, Si, and Mn, wherein the grain size thereof is set to particularly below average of 2 μm, which has ferrite grain with equiaxed morphology, which has high formability in forming, and the ferrite grain-size deviation in the thickness direction is uniformed down to the level not higher than a predetermined amount whereby uniform formability in forming is high. The method includes a first rolling for rolling the sheet such that the total rolling reduction is 80% or more or the average grain size is 30 μm or less in a form of single phase of austenite, a second rolling of a single-pass, a third rolling being conducted thereafter, and a following cooling.
摘要翻译：提供了一种制造热轧板的方法，其中该方法对含有C，Si和Mn的钢板进行晶粒细化，其中其晶粒尺寸设定为特别低于2μm的平均值，其具有铁素体晶粒与等轴形状，其形成成形性高，并且厚度方向的铁素体晶粒尺寸偏差均匀化到不高于预定量的水平，从而均匀成形性高。该方法包括第一次轧制，以使得总的轧制压下量为80％以上，或平均粒径为30μm以下，奥氏体的单相，单程次的第二轧制，此后进行第三次轧制，并进行随后的冷却。

18. 发明授权

US08257517B2 Method of producing cold-rolled steel sheet 有权
标题翻译：生产冷轧钢板的方法
公开(公告)号：US08257517B2
公开(公告)日：2012-09-04
申请号：US13046869
申请日：2011-03-14
申请人： Toshirou Tomida , Norio Imai , Mitsuru Yoshida , Kaori Kawano , Masayuki Wakita , Tamotsu Toki , Masanori Yasuyama , Hitomi Nishibata
发明人： Toshirou Tomida , Norio Imai , Mitsuru Yoshida , Kaori Kawano , Masayuki Wakita , Tamotsu Toki , Masanori Yasuyama , Hitomi Nishibata
IPC分类号： C21D8/02 , C21D9/46
CPC分类号： C23C2/40 , B32B15/012 , B32B15/013 , C21D8/0205 , C21D8/0226 , C21D8/0263 , C21D8/0405 , C21D8/0463 , C21D9/46 , C21D9/50 , C21D2201/03 , C21D2211/002 , C21D2211/005 , C21D2211/009 , C22C18/04 , C22C38/02 , C22C38/04 , C22C38/06 , C23C2/06 , C23C2/28
摘要： A steel sheet excellent in mechanical strength, workability and thermal stability and suited for use as a raw material in such fields of manufacturing automobiles, household electric appliances and machine structures and of constructing buildings, and a manufacturing method thereof are provided.The steel sheet is a hot-rolled steel sheet of carbon steel or low-alloy steel, the main phase of which is ferrite, and is characterized in that the average ferrite crystal grain diameter D (μm) at the depth of ¼ of the sheet thickness from the steel sheet surface satisfies the relations respectively defined by the formulas (1) and (2) given below and the increase rate X (μm/min) in average ferrite crystal grain diameter at 700° C. at the depth of ¼ of the sheet thickness from the steel sheet surface and said average crystal grain diameter D (μm) satisfy the relation defined by the formula (3) given below: 1.2≦D≦7 formula (1) D≦2.7+5000/(5+350·C+40·Mn)2 formula (2) D·X≦0.1 formula (3) wherein C and Mn represent the contents (in % by mass) of the respective elements in the steel.
摘要翻译：提供了机械强度，可加工性和热稳定性优异且适用于制造汽车，家用电器和机器结构以及建筑物的领域中的原料的钢板及其制造方法。该钢板是碳素钢或低合金钢的热轧钢板，其主相是铁素体，其特征在于，在片材的1/4深度处的平均铁素体晶粒直径D（μm）从钢板表面的厚度满足下面给出的式（1）和（2）所定义的关系，并且在700℃的平均铁素体晶粒直径的增加速率X（μm/ min）在深度为1/4 钢板表面的平均厚度和所述平均晶粒直径D（μm）满足以下公式（3）所定义的关系：1.2＆nlE; D＆nlE; 7式（1）D＆nlE; 2.7 + 5000 /（5+ 350·C + 40·Mn）2式（2）D·X＆nlE; 0.1式（3）其中C和Mn表示钢中各元素的含量（质量％）。

19. 发明申请

US20100089505A1 METHOD FOR MANUFACTURING HOT-ROLLED SHEET HAVING FINE-GRAINED FERRITE, AND HOT-ROLLED SHEET 有权
公开(公告)号：US20100089505A1
公开(公告)日：2010-04-15
申请号：US12525094
申请日：2007-02-02
申请人： Suguhiro Fukushima , Manabu Eto , Tamotsu Sasaki , Kaori Kawano , Masayuki Wakita
发明人： Suguhiro Fukushima , Manabu Eto , Tamotsu Sasaki , Kaori Kawano , Masayuki Wakita
IPC分类号： C21D8/02 , C22C38/00 , C22C38/04
CPC分类号： C22C38/06 , B21B1/38 , B21B3/00 , C21D8/02 , C22C38/001 , C22C38/02 , C22C38/04
摘要： The present invention provides a method for manufacturing the hot-rolled sheet, which includes: a step A including a first rolling in which a steel sheet containing 0.04-0.20% C, 0.01-2.0% Si, 0.5-3.0% Mn by mass, and the reminder being Fe and inevitable impurities, is rolled by successive multi-pass rolling at a total rolling reduction of 80% or more while keeping the steel sheet at temperatures not lower than the para-equilibrium transformation temperature Ae3; a step B including a second rolling in which a single-pass rolling is carried out at a rolling reduction of 30-55% when an entry side temperature is not lower than the para-equilibrium transformation temperature Ae3; a step C including a third rolling in which a single-pass rolling is carried out at a rolling reduction of 35-70% when an entry side temperature is set within a predetermined range; and a step D in which within 0.2 seconds after the third rolling, the rolled sheet is cooled at a cooling rate of 600 degree C./sec or higher to a temperature not higher than {(the para-equilibrium transformation temperature Ae3)−130 degree C.}, in the step C, the third rolling being carried out: within 0.6 seconds after the second rolling when the predetermined temperature range is {(the para-equilibrium transformation temperature Ae3)−60 degree C.} or more and below {(the para-equilibrium transformation temperature Ae3)−30 degree C.}; within 0.5 seconds after the second rolling when the predetermined temperature range is {(the para-equilibrium transformation temperature Ae3)−30 degree C.} or more and below {(the para-equilibrium transformation temperature Ae3)−5 degree C.}; and within 0.3 seconds after the second rolling when the predetermined temperature range is {(the para-equilibrium transformation temperature Ae3)−5 degree C.} or more and below {(the para-equilibrium transformation temperature Ae3)+20 degree C.}.

20. 发明申请

US20140086787A1 METHOD FOR MANUFACTURING HOT-ROLLED SHEET HAVING FINE-GRAINED FERRITE, AND HOT-ROLLED SHEET 审中-公开
标题翻译：用于制造具有细粒铁粉的热轧板和热轧板的方法
公开(公告)号：US20140086787A1
公开(公告)日：2014-03-27
申请号：US13792458
申请日：2013-03-11
申请人： Suguhiro Fukushima , Manabu Eto , Tamotsu Sasaki , Kaori Kawano , Masayuki Wakita
发明人： Suguhiro Fukushima , Manabu Eto , Tamotsu Sasaki , Kaori Kawano , Masayuki Wakita
IPC分类号： C22C38/06 , C22C38/02 , C22C38/00 , C22C38/04
CPC分类号： C22C38/06 , B21B1/38 , B21B3/00 , C21D8/02 , C22C38/001 , C22C38/02 , C22C38/04
摘要： A method for manufacturing a hot-rolled sheet attains grain refinement of the steel sheet whose grain size is extremely fine. In particular, a ferrite grain size of less than average 2 μm is obtained, which is not laminar but has ferrite grains with equiaxed morphology and exhibits high formability in forming. The method comprises the steps of rolling and cooling, wherein the rolling reductions, cooling steps, and temperature are closely regulated. A hot rolled sheet made from the method of manufacturing has a controlled ferrite grain in different regions of sheet thickness.
摘要翻译：热轧板的制造方法可以获得晶粒细化的钢板的晶粒细化。特别地，得到小于2μm的铁素体晶粒尺寸，其不是层状的，而是具有等轴形态的铁素体晶粒，并且在成型时表现出高的成形性。该方法包括滚动和冷却的步骤，其中滚动减少，冷却步骤和温度被严格地调节。由制造方法制成的热轧板在板厚不同的区域具有受控的铁素体晶粒。

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