公开(公告)号：US06755919B2

公开(公告)日：2004-06-29

申请号：US10089035

申请日：2002-03-26

申请人： Takaaki Toyooka ,  Akira Yorifuji ,  Makoto Kitazawa ,  Yoshikazu Kawabata ,  Motoaki Itadani ,  Masatoshi Aratani ,  Takatoshi Okabe

发明人： Takaaki Toyooka ,  Akira Yorifuji ,  Makoto Kitazawa ,  Yoshikazu Kawabata ,  Motoaki Itadani ,  Masatoshi Aratani ,  Takatoshi Okabe

IPC分类号： C22C3818

CPC分类号： C21D8/10 ,  C21D8/105 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/002 ,  C22C38/004 ,  C22C38/02 ,  C22C38/04 ,  C22C38/18

摘要： A stainless steel tube having excellent formability for secondary operation comprises: a chemical composition including not more than 0.20 mass % of C; not more than 1.5 mass % of Si; not more than 2.0 mass % of Mn; 10-18 mass % of Cr; not more than 0.03 mass % of N; or further at least one type of element selected from the group of: not more than 0.6 mass % of Cu; not more than 0.6 mass % of Ni; not more than 2.5 mass % of Mo; not more than 1.0 mass % of Nb; not more than 1.0 mass % of Ti; and not more than 1.0 mass % of V; Fe as the remainder and the inevitable impurities; and a structure constituted of ferrite or ferrite and martensite, wherein the TE value defined by the following formula exceeds 25,000 Mpa·%, TE=TS×(El+21.9) TS represents the tensile strength in the tube axial direction, and El represents the elongation in such direction.

摘要翻译： 对于二次操作具有优异成形性的不锈钢管包括：不超过0.20质量％的C的化学组成; 不超过1.5质量％的Si; 不大于2.0质量％的Mn; 10-18质量％Cr; 不大于0.03质量％的N; 或另外至少一种选自以下的元素中的至少一种：不大于0.6质量％的Cu; 不大于0.6质量％的Ni; 不大于2.5质量％的Mo; 不大于1.0质量％的Nb; 不大于1.0质量％的Ti; 不大于1.0质量％的V; Fe作为剩余部分和不可避免的杂质; 以及由铁素体或铁素体和马氏体组成的结构，其中由下式定义的TE值超过25,000Mpa％，TE = TSx（E1 + 21.9）TS表示管轴向的拉伸强度，E1表示伸长率 在这个方向。

公开(公告)号：US07591914B2

公开(公告)日：2009-09-22

申请号：US10258982

申请日：2001-06-14

申请人： Takaaki Toyooka ,  Yoshikazu Kawabata ,  Akira Yorifuji ,  Masanori Nishimori ,  Motoaki Itadani ,  Takatoshi Okabe ,  Masatoshi Aratani

发明人： Takaaki Toyooka ,  Yoshikazu Kawabata ,  Akira Yorifuji ,  Masanori Nishimori ,  Motoaki Itadani ,  Takatoshi Okabe ,  Masatoshi Aratani

IPC分类号： C21D9/08 ,  C22C38/00

CPC分类号： B21C37/08 ,  B21B17/14 ,  B21C37/06 ,  C21D8/10 ,  C21D9/08 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06

摘要： A steel pipe is produced by a method including performing diameter-reducing rolling on a steel pipe in a temperature range of from 600° C. to Ac3 with a reduction in diameter of not less than 30%, preferably after heating the steel pipe to temperatures of not lower than Ac1, the steel pipe being produced by seam-welding strip steel, or a method further including the step of performing heat treatment of holding the rolled steel pipe in a temperature range of from 600° C. to 900° C. for a time of 1 second or longer during cooling subsequent to the diameter-reducing rolling or by reheating the rolled steel pipe after the cooling.

摘要翻译： 钢管通过以下方法制造，该方法包括在600℃至300℃的温度范围内对钢管进行直径减小轧制，直径减小至少30％，优选在将钢管加热至温度 不低于Ac1的钢管，通过缝焊带钢生产的钢管，或者还包括在600℃〜900℃的温度范围内进行热轧处理的方法。 在直径减小轧制之后的冷却期间或通过在冷却之后再加热轧制钢管，持续1秒或更长时间。

公开(公告)号：US06736910B2

公开(公告)日：2004-05-18

申请号：US10048322

申请日：2002-01-29

申请人： Takaaki Toyooka ,  Yoshikazu Kawabata ,  Akira Yorifuji ,  Masanori Nishimori ,  Motoaki Itadani ,  Takatoshi Okabe ,  Masatoshi Aratani ,  Yasue Koyama

发明人： Takaaki Toyooka ,  Yoshikazu Kawabata ,  Akira Yorifuji ,  Masanori Nishimori ,  Motoaki Itadani ,  Takatoshi Okabe ,  Masatoshi Aratani ,  Yasue Koyama

IPC分类号： C22C3802

CPC分类号： B21C37/30 ,  B21B17/14 ,  B21C37/06 ,  B21C37/08 ,  B21C37/16 ,  C21D8/10 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  Y10S148/909

摘要： The invention provides a high-carbon steel pipe having superior cold workability and induction hardenability, and a method of producing the steel pipe. The method comprises the steps of heating or soaking a base steel pipe having a composition containing C: 0.3 to 0.8%, Si: not more than 2%, and Mn: not more than 3%, and then carrying out reducing rolling on the base steel pipe at least in the temperature range of (Ac1, transformation point −50° C.) to Ac1, transformation point with an accumulated reduction in diameter of not less than 30%. A structure in which the grain size of cementite is not greater than 1.0 &mgr;m is obtained, thus resulting in improved cold workability and induction hardenability.

摘要翻译： 本发明提供一种具有优异的冷加工性和感应淬透性的高碳钢管，以及钢管的制造方法。 该方法包括以下步骤：加热或浸泡含有C：0.3〜0.8％，Si：2％以下，Mn：3％以下的组成的基础钢管，然后在基材上进行还原轧制 钢管至少在（Ac1，相变点-50℃）至Ac1的温度范围内，相变点的直径累积减小不小于30％。 获得了渗碳体的粒径不大于1.0μm的结构，从而提高了冷加工性和感应淬透性。

公开(公告)号：US07018488B2

公开(公告)日：2006-03-28

申请号：US10049510

申请日：2001-06-14

申请人： Takaaki Toyooka ,  Masanori Nishimori ,  Yoshikazu Kawabata ,  Akira Yorifuji ,  Motoaki Itadani ,  Takatoshi Okabe ,  Masatoshi Aratani

发明人： Takaaki Toyooka ,  Masanori Nishimori ,  Yoshikazu Kawabata ,  Akira Yorifuji ,  Motoaki Itadani ,  Takatoshi Okabe ,  Masatoshi Aratani

IPC分类号： C22C38/02 ,  C22C38/06 ,  C21D8/06

CPC分类号： C22C38/38 ,  C21D8/10 ,  C21D8/105 ,  C21D2211/002 ,  C21D2211/008 ,  C22C38/002 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14

摘要： A steel tube having a composition which contains: 0.05 to 0.30% of C; 1.8 to 4.0% of Mn; Si; and Al is subjected to a diameter-reducing rolling process in which the total diameter-reduction rate is no less than 20% and the temperature at which the diameter-reducing rolling process is finished is no higher than 800° C., whereby a structure constituted of martensite and/or bainite or further of ferrite is obtained as a transformation product from the deformed γ. As a result, a steel tube having tensile strength of 1000 MPa or more and excellent three-point-bending property can be obtained. The composition of the steel tube of the present invention may further include at least one type of element selected from the group consisting of Cu, Ni, Cr and Mo, or at least one type of element selected from the group consisting of Nb, V, Ti and B, or at least of one type selected from the group consisting of REM and Ca.

摘要翻译： 一种钢管，其组成为：0.05〜0.30％的C; 1.8〜4.0％的Mn; 硅; 对Al进行直径缩径率为20％以上，直径缩径轧制加工结束温度为800℃以下的直径缩径轧制加工， 由马氏体和/或贝氏体构成的铁素体或其它铁素体由变形的γ得到。 结果，可以得到拉伸强度为1000MPa以上且具有优异的三点弯曲性的钢管。 本发明的钢管的组成还可以包括选自由Cu，Ni，Cr和Mo组成的组中的至少一种元素，或者选自Nb，V， Ti和B，或至少一种选自REM和Ca.

公开(公告)号：US06749954B2

公开(公告)日：2004-06-15

申请号：US10161407

申请日：2002-05-31

申请人： Takaaki Toyooka ,  Masatoshi Aratani ,  Yoshikazu Kawabata ,  Yuji Hashimoto ,  Akira Yorifuji ,  Takatoshi Okabe ,  Takuya Nagahama ,  Mitsuo Kimura

发明人： Takaaki Toyooka ,  Masatoshi Aratani ,  Yoshikazu Kawabata ,  Yuji Hashimoto ,  Akira Yorifuji ,  Takatoshi Okabe ,  Takuya Nagahama ,  Mitsuo Kimura

IPC分类号： B32B1518

CPC分类号： B21D26/047 ,  B21B3/02 ,  B21B17/14 ,  B21B45/004 ,  B21C37/06 ,  B21D26/039 ,  B21D26/043 ,  C21D8/10 ,  Y10T428/12965

摘要： A welded steel pipe is formed by heating or soaking an untreated welded steel pipe having a steel composition containing, on the basis of mass percent: about 0.03% to about 0.2% C, about 2.0% or less of Si, not less than about 1.0% to about 1.5% Mn, about 0.1% or less of P, about 0.01% or less of S, about 1.0% or less of Cr, about 0.1% or less of Al, about 0.1% or less of Nb, about 0.1% or less of Ti, about 0.1% or less of V, and about 0.01% or less of N; and by reduction-rolling the treated steel pipe at a cumulative reduction rate of at least about 35% and a final rolling temperature of about 500° C. to about 900° C. The welded steel pipe exhibits excellent hydroformability, i.e., has a tensile strength of at least about 590 MPa and an n×r product of at least about 0.22. The treated steel pipe is preferably reduction-rolled at a cumulative reduction rate of at least about 20% below the Ar3 transformation point.

摘要翻译： 焊接钢管是通过加热或浸渍具有钢质组成的未经处理的焊接钢管形成的，所述钢组合物基于质量百分比：约0.03％至约0.2％C，约2.0％或更少的Si，不小于约1.0 至约1.5％的Mn，约0.1％或更少的P，约0.01％或更少的S，约1.0％或更少的Cr，约0.1％或更少的Al，约0.1％或更少的Nb，约0.1％ 或更少的Ti，约0.1％或更少的V和约0.01％或更少的N; 并且通过将处理后的钢管以至少约35％的累积压下率和约500℃至约900℃的最终轧制温度进行还原轧制。焊接钢管表现出优异的加氢成形性，即具有拉伸强度 至少约590MPa的强度和至少约0.22的nxr产物。 经处理的钢管优选以低于Ar 3相变点至少约20％的累积压缩率进行还原轧制。

公开(公告)号：US06682829B2

公开(公告)日：2004-01-27

申请号：US10160820

申请日：2002-05-31

申请人： Takaaki Toyooka ,  Masatoshi Aratani ,  Yoshikazu Kawabata ,  Yuji Hashimoto ,  Akira Yorifuji ,  Takatoshi Okabe ,  Takuya Nagahama ,  Mitsuo Kimura

发明人： Takaaki Toyooka ,  Masatoshi Aratani ,  Yoshikazu Kawabata ,  Yuji Hashimoto ,  Akira Yorifuji ,  Takatoshi Okabe ,  Takuya Nagahama ,  Mitsuo Kimura

IPC分类号： B32B1518

CPC分类号： C22C38/02 ,  C21D8/10 ,  C22C38/06 ,  C22C38/28 ,  C22C38/38 ,  Y10T428/12965

摘要： A welded steel pipe is formed by heating or soaking an untreated welded steel pipe having a steel composition comprising, on the basis of mass percent: about 0.05% to about 0.3% C; about 2.0% or less of Si; more than about 1.5% to about 5.0% Mn; about 0.1% or less of P; about 0.01% or less of S; about 0.1% or less of Cr; about 0.1% or less of Al; about 0.1% or less of Nb; about 0.3% or less of Ti; and about 0.01% or less of N; and by diameter-reduction-rolling the treated steel pipe at a accumulated diameter reduction rate of at least about 35% and a finish rolling temperature of about 500° C. to about 900° C. The welded steel pipe exhibits excellent hydroformability, i.e., has a tensile strength of about 780 MPa or more and a n×r product of at least about 0.15. The treated steel pipe is preferably diameter-reduction-rolled at a accumulated diameter reduction rate of at least about 20% below the Ar3 transformation point.

摘要翻译： 焊接钢管是通过加热或浸渍具有钢质组成的未经处理的焊接钢管形成的，所述焊接钢管基于质量百分比：约0.05％至约0.3％C; 约2.0％以下的Si; 大于约1.5％至约5.0％的Mn; 约0.1％以下的P; 约0.01％以下的S; 约0.1％以下的Cr; 约0.1％以下的Al; 约0.1％以下的Nb; 约0.3％以下的Ti; 和约0.01％以下的N; 并且以约至少约35％的累积直径减小率和约500℃至约900℃的精轧温度对经处理的钢管进行直径缩小轧制。焊接钢管显示出优异的加氢性能， 具有约780MPa或更高的拉伸强度和至少约0.15的nxr产品。 经处理的钢管优选以低于Ar 3相变点至少约20％的累积直径减小率进行直径减小轧制。

公开(公告)号：US06723453B2

公开(公告)日：2004-04-20

申请号：US10160798

申请日：2002-05-31

申请人： Takaaki Toyooka ,  Masatoshi Aratani ,  Yoshikazu Kawabata ,  Yuji Hashimoto ,  Akira Yorifuji ,  Takatoshi Okabe ,  Takuya Nagahama ,  Mitsuo Kimura

发明人： Takaaki Toyooka ,  Masatoshi Aratani ,  Yoshikazu Kawabata ,  Yuji Hashimoto ,  Akira Yorifuji ,  Takatoshi Okabe ,  Takuya Nagahama ,  Mitsuo Kimura

IPC分类号： B32B1518

CPC分类号： C21D8/10 ,  C22C38/04 ,  Y10T428/12965

摘要： A welded steel pipe is formed by heating or soaking an untreated welded steel pipe having a steel composition containing, on the basis of mass percent: about 0.05% to about 0.2% C; about 0.2% or less of Si; about 1.5% or less of Mn; about 0.1% or less of P; about 0.01% or less of S; about 0.1% or less of Al; and about 0.01% or less of N; and by reduction-rolling the treated steel pipe at a cumulative reduction rate of at least about 35% and a final rolling temperature of about 500° C. to about 900° C. The welded steel pipe exhibits excellent hydroformability, i.e., has a tensile strength of at least about 400 MPa and an n×r product of at least about 0.22. The treated steel pipe is preferably reduction-rolled at a cumulative reduction rate of at least about 20% below the Ar3 transformation point. The welded steel pipe is suitable for forming structural components.

摘要翻译： 焊接钢管是通过加热或浸渍含有基于质量％：约0.05％至约0.2％C的钢组合物的未处理焊接钢管形成的; 约0.2％以下的Si; 约1.5％以下的Mn; 约0.1％以下的P; 约0.01％以下的S; 约0.1％以下的Al; 和约0.01％以下的N; 并且通过将处理后的钢管以至少约35％的累积压下率和约500℃至约900℃的最终轧制温度进行还原轧制。焊接钢管表现出优异的加氢成形性，即具有拉伸强度 至少约400MPa的强度和至少约0.22的nxr产物。 经处理的钢管优选以低于Ar 3相变点至少约20％的累积压缩率进行还原轧制。 焊接钢管适用于形成结构件。

公开(公告)号：US06949728B2

公开(公告)日：2005-09-27

申请号：US10476800

申请日：2001-08-02

申请人： Takaaki Toyooka ,  Takatoshi Okabe ,  Motoaki Itadani ,  Masatoshi Aratani ,  Osamu Kondo

发明人： Takaaki Toyooka ,  Takatoshi Okabe ,  Motoaki Itadani ,  Masatoshi Aratani ,  Osamu Kondo

IPC分类号： B23K13/08 ,  B23K13/02 ,  B23K31/02 ,  H05B6/10 ,  B23K13/01 ,  B21D39/00

CPC分类号： B23K13/025 ,  B23K31/02 ,  B23K2101/06

摘要： An impeder, for manufacturing a welded pipe, including an insulating case 4 containing laminations 10 having coated steel sheets 8 formed by providing an insulating coating on untreated steel sheets having a thickness of 0.3 mm or less and an insulating case 8 containing the laminations, wherein the steel sheets contain 1.5-20% of Cr, 2.5-10% of Si, and 100 ppm or less of C and N in total, or further contain one or more of Al, Mn, and P, where the content of Al is 5% or less and the content of each of Mn and P is 1% or less, the remainder being Fe and unavoidable impurities; and preferably have a resistivity of 60 μΩ·cm or more.

摘要翻译： 一种用于制造焊接管的阻碍物，包括：绝缘壳体4，其包含通过在厚度为0.3mm以下的未处理钢板上提供绝缘涂层而形成的具有镀覆钢板8的叠片10和包含所述叠片的绝缘壳体8， 钢板含有1.5-20％的Cr，2.5-10％的Si和100ppm或更少的C和N，或者还包含Al，Mn和P中的一种或多种，​​Al的含量为 5％以下，Mn和P的含量为1％以下，余量为Fe和不可避免的杂质; 并且优选具有60μΩa.cm以上的电阻率。

公开(公告)号：US20150275339A1

公开(公告)日：2015-10-01

申请号：US14410264

申请日：2012-06-28

申请人： Masatoshi Aratani ,  Shunsuke Toyoda ,  Takatoshi Okabe ,  Yoshikazu Kawabata ,  Kenichi Iwazaki

发明人： Masatoshi Aratani ,  Shunsuke Toyoda ,  Takatoshi Okabe ,  Yoshikazu Kawabata ,  Kenichi Iwazaki

IPC分类号： C22C38/16 ,  C21D9/08 ,  C21D6/00 ,  C22C38/00 ,  C22C38/12 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C21D8/10 ,  C22C38/14

CPC分类号： C22C38/16 ,  B21B17/14 ,  B23K11/08 ,  B23K11/16 ,  B23K13/025 ,  B23K2101/06 ,  B23K2103/04 ,  C21D6/005 ,  C21D6/008 ,  C21D8/105 ,  C21D9/08 ,  C21D2211/003 ,  C21D2211/005 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14

摘要： A raw steel tube has a composition containing, by mass, 0.25% to 0.60% carbon, 0.01% to 2.0% silicon, 0.2% to 3.0% manganese, 0.001% to 0.1% aluminum, 0.001% to 0.05% phosphorus, 0.02% or less sulfur, 0.0010% to 0.0100% nitrogen, 0.0003% to 0.0050% boron, and 0.0001% to 0.0050% calcium, the balance being iron and incidental impurities. The raw steel tube is heated to and soaked at an Ac3 transformation point or higher and is then subjected to stretch-reducing rolling at a finishing temperature of rolling of 900° C. to (Ac1 transformation point) with a cumulative reduction in diameter of 30% to 70% within the temperature range of 900° C. or lower.

摘要翻译： 生钢管具有以质量计含有0.25％至0.60％的碳，0.01％至2.0％的硅，0.2％至3.0％的锰，0.001％至0.1％的铝，0.001％至0.05％的磷，0.02％或 较少的硫，0.0010％至0.0100％的氮，0.0003％至0.0050％的硼和0.0001％至0.0050％的钙，余量为铁和附带的杂质。 将粗钢管在Ac 3相变点以上加热浸渍，然后在900℃〜（Ac1相变点）的轧制终轧温度下进行拉伸缩径轧制，累积直径减小30 在900℃以下的温度范围内为70％以下。

公开(公告)号：US20130126036A1

公开(公告)日：2013-05-23

申请号：US13699190

申请日：2011-05-23

申请人： Masatoshi Aratani ,  Yoshikazu Kawabata ,  Takatoshi Okabe ,  Yukinori Iizuka ,  Hiromichi Hori ,  Gunji Makio ,  Kenichi Iwazaki

发明人： Masatoshi Aratani ,  Yoshikazu Kawabata ,  Takatoshi Okabe ,  Yukinori Iizuka ,  Hiromichi Hori ,  Gunji Makio ,  Kenichi Iwazaki

IPC分类号： F16L9/02 ,  B23K9/00

CPC分类号： F16L9/02 ,  B23K9/00 ,  B23K11/0873 ,  C21D9/08 ,  C21D9/50 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/14

摘要： A base material portion of an electric resistance welded steel pipe has a composition including C at 0.25 to 0.55%, Si at 0.01 to 1.0%, Mn at 0.2 to 3.0%, Al at not more than 0.1% and N at 0.0010 to 0.0100%, with the balance being represented by Fe and inevitable impurities, and the weld defect area, which is a projected area of a weld defect in an electric resistance weld zone, is less than 40000 μm2.

摘要翻译： 电阻焊钢管的基材部分具有C为0.25〜0.55％，Si为0.01〜1.0％，Mn为0.2〜3.0％，Al为0.1％以下，N为0.0010〜0.0100％ ，余量由Fe和不可避免的杂质表示，作为电阻焊接区域的焊接缺陷的投影面积的焊接缺陷面积小于40000mum2。