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1. 发明专利

JP2011168867A Method for heat-treating welded part of martensitic high-chromium electric resistance welded steel pipe and method for manufacturing martensitic high-chromium electric resistance welded steel pipe 有权
标题翻译：马氏体高电阻焊接钢管焊接部分的热处理方法及制造马氏体高铬电阻焊钢管的方法
公开(公告)号：JP2011168867A
公开(公告)日：2011-09-01
申请号：JP2010036157
申请日：2010-02-22
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： ASAHI HITOSHI , SAWAMURA MITSURU
IPC分类号： C21D9/50 , B21C37/08 , B23K31/00 , C21D9/08 , C22C38/00 , C22C38/60
摘要： PROBLEM TO BE SOLVED: To surely prevent cold cracking in a welded part when a martensitic high-chromium steel pipe is manufactured by an electric resistance welded pipe manufacturing process.
SOLUTION: A martensitic high-chromium steel sheet which contains, by mass, 0.1-0.5% C, 7-18% Cr, ≤0.5% Si, ≤2% Mn, ≤0.03% P, ≤0.05% S, ≤0.1% Al, ≤0.1% N and the balance of Fe and inevitable impurities is subjected to roll molding, the roll-molded steel sheet is subjected to electric resistance welding to obtain an electric resistance welded steel pipe, the welded part of the electric resistance welded steel pipe is cooled to ≤100°C and the cooled welded part is reheated to the temperature that exceeds Ac
1 and is reheated so as to be equal to or lower than 1/2(Ac
1 +Ac
3 ).
COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：当通过电阻焊管制造工艺制造马氏体高铬钢管时，可靠地防止焊接部的冷裂纹。解决方案：一种马氏体高铬钢板，其特征在于，以质量计含有0.1〜0.5％的C，7〜18％的Cr，≤0.5％的Si，≤2％的Mn，≤0.03％的P，≤0.05％的S， ≤0.1％Al，≤0.1％N，余量为Fe和不可避免的杂质进行辊压成型，对该成型钢板进行电阻焊接，得到电阻焊钢管，焊接部分为电电阻焊钢管冷却至≤100℃，将被冷却的焊接部件再加热至超过Ac 1 的温度，再加热至1/2以下（Ac < SB> 1 + AC 3 ）。版权所有（C）2011，JPO＆INPIT

2. 发明专利

JP2011017048A Method for manufacturing electroseamed steel pipe having sour-gas resistance for line pipe 有权
标题翻译：制造线管的电阻钢丝管的方法
公开(公告)号：JP2011017048A
公开(公告)日：2011-01-27
申请号：JP2009161942
申请日：2009-07-08
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： SAWAMURA MITSURU , ASAHI HITOSHI
IPC分类号： C21D9/08 , B21C37/08 , C21D9/50 , C22C38/00 , C22C38/14 , C22C38/54
摘要： PROBLEM TO BE SOLVED: To provide a method for manufacturing an electroseamed steel pipe superior in sour-gas resistance and having a grade of API5L X65 or higher for a line pipe, which can reliably impart the sour-gas resistance and strength to the electroseamed steel pipe by heat treatment at a relatively low temperature.SOLUTION: The electroseamed steel pipe includes, by mass%, 0.001-0.004% Ca, and 0.0010% or less S and 0.0030% or less O which are limited, while the contents [mass%] of Ca, O and S satisfy expression 1
摘要翻译：要解决的问题：提供一种用于制造耐酸性优异且具有API5L X65或更高等级的管线管的电解钢管的方法，其可以可靠地赋予电选钢的耐酸气性和强度管子在相对低的温度下进行热处理。解决方案：电铸钢管以质量％计含有0.001-0.004％Ca和0.0010％以下的S和0.0030％以下的O，其含量[质量％ ]的Ca，O和S满足表达式1

3. 发明专利

JP2010240721A Method of manufacturing thick-walled electric resistance welded tube excellent in property of weld zone 有权
标题翻译：制造厚壁电阻焊管的方法在焊接区域优越
公开(公告)号：JP2010240721A
公开(公告)日：2010-10-28
申请号：JP2009094408
申请日：2009-04-08
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： HISHIDA HIROTOSHI , ASAHI HITOSHI
IPC分类号： B21C37/08 , B23K13/00 , B23K33/00
摘要： PROBLEM TO BE SOLVED: To provide a method of manufacturing a thick-walled electric resistance welded tube excellent in the properties of a weld zone, by which production of weld defects in the thick-walled electric resistance welded tube is stably suppressed without greatly increasing capacity of a power source.
SOLUTION: In the method of manufacturing the thick-walled electric resistance welded tube excellent in the properties of the weld zone, a groove in which the ratio α/t of the groove depth α [mm] of the groove to the thickness t is ≥0.03 and the taper angle θ [°] of the groove is 4-86° is provided on the end faces of the side parts of the thick steel plate or a steel strip of ≥15.4 mm in the plate thickness t and, the plate thickness t, the groove depth α and the taper angle θ of the groove satisfy: α/t
摘要翻译：要解决的问题：提供一种制造焊接区特性优异的厚壁电阻焊管的方法，通过该方法可以稳定地抑制厚壁电阻焊管中的焊接缺陷的产生而没有大大增加电源的容量。解决方案：在制造焊接区特性优异的厚壁电阻焊管的方法中，槽的槽深度α[mm]与厚度的比值α/ t 在厚钢板的侧面的端面或板厚t为≥15.4mm的钢带上，t为≥0.03，槽的锥角θ[°]为4-86°，板厚t，槽深度α和槽的锥角θ满足：α/ t <3.43 <θ。槽的锥角[°]优选<60°。版权所有（C）2011，JPO＆INPIT

4. 发明专利

JP2010189720A Method of manufacturing sheet steel for sour-resistant line pipe 有权
标题翻译：生产线路钢管的方法
公开(公告)号：JP2010189720A
公开(公告)日：2010-09-02
申请号：JP2009035659
申请日：2009-02-18
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： ASAHI HITOSHI , MURAKI TARO , SAWAMURA MITSURU , HARA TAKUYA
IPC分类号： C21D8/02 , B21B1/38 , B21B3/00 , C22C38/00 , C22C38/14 , C22C38/54
CPC分类号： C21D8/0226 , C21D8/0263 , C21D9/14 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04
摘要： PROBLEM TO BE SOLVED: To provide a method for manufacturing a sheet steel for a line pipe having excellent sour resistance, which copes with fluctuation in the heating temperature of hot rolling and plate thickness since the temperature is easily dropped during the hot rolling when the heating temperature of a steel slab is dropped, or when the thickness of the sheet steel is small. SOLUTION: A steel slab contains C, Si, Mn, Nb and Ti while limiting Al, P and N, and further contains 0.001-0.004% Ca while limiting S to be ≤0.0008% and O to be ≤0.0030%, wherein the contents of Ca, O and S satisfy an inequality [Ca](1-124[O])/1.25[S]>3.0. After re-heating the steel slab at a temperature of 1,000-1,250°C, the steel slab is subjected to the rough-rolling, the finish rolling and the accelerated cooling. The accelerated cooling starting temperature Tc and the ratio [C/Mn] of the C amount to the Mn amount satisfy the inequalities 4≤Tc×[C/Mn]≤32. The accelerated cooling rate is set to be 10-40°C/s, and the stop temperature of the accelerated cooling is set to be 200-500°C. COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：解决的问题：提供一种具有优异耐酸性的管线管用钢板的制造方法，其能够应对热轧时的热轧温度和板厚度的变动，因为在热轧期间温度容易下降当钢板的加热温度下降时，或者当钢板的厚度小时。
解决方案：钢板含有C，Si，Mn，Nb和Ti，同时限制Al，P和N，并且进一步含有0.001-0.004％的Ca，同时限制S为≤0.0008％，O为≤0.0030％其中Ca，O和S的含量满足不等式[Ca]（1-124 [O]）/ 1.25 [S]> 3.0。在1000-1,250℃的温度下对钢坯进行再加热后，对钢坯进行粗轧，精轧，加速冷却。加速冷却起始温度Tc和C量与Mn量的比[C / Mn]满足不等式4≤Tc×[C / Mn]≤32。将加速冷却速度设定为10-40℃/ s，将加速冷却的停止温度设定为200〜500℃。版权所有（C）2010，JPO＆INPIT

5. 发明专利

JP2009084598A Method for manufacturing steel sheet superior in deformability and low-temperature toughness for ultrahigh-strength line pipe, and method for manufacturing steel pipe for ultrahigh-strength line pipe 审中-公开
标题翻译：用于制造超高强度线管的可变形性和低温韧性的钢板超导体的制造方法以及用于制造用于超强度线管的钢管的方法
公开(公告)号：JP2009084598A
公开(公告)日：2009-04-23
申请号：JP2007252350
申请日：2007-09-27
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： HARA TAKUYA , TERADA YOSHIO , ASAHI HITOSHI
IPC分类号： C21D8/02 , B21C37/08 , B23K9/00 , B23K9/025 , B23K9/18 , B23K101/06 , C21D9/08 , C21D9/50 , C22C38/00 , C22C38/14 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a method for manufacturing a steel sheet of which the base metal has superior strength, low-temperature toughness and deformability, for an ultrahigh-strength line pipe that can be easily welded on the actual place and has a tensile strength of 900 MPa or higher (X120 or higher in the API standards), and to provide a method for manufacturing a steel pipe for an ultrahigh-strength line pipe.
SOLUTION: The steel material comprises, by mass%, 0.03 to 0.07% C, 0.01 to 0.50% Si, 1.5 to 2.5% Mn, ≤0.01% P, ≤0.0030% S, 0.0001 to 0.2% Nb, 0.0005 to 0.03% Al, 0.003 to 0.030% Ti, 0.0001 to 0.0050% B, and the balance iron with unavoidable impurities. The method for manufacturing the steel sheet superior in deformability and low-temperature toughness for the ultrahigh-strength line pipe comprises the steps of: heating the steel material; hot-rolling it; cooling it with water to the γ/α transformation starting point or higher; reheating it; and subsequently cooling it with water.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：提供一种用于制造具有优异强度，低温韧性和变形性的钢板的方法，对于能够容易地焊接到实际位置的超高强度管线管，以及具有900MPa以上的拉伸强度（API标准中的X120以上），并且提供一种用于制造超高强度管线管的钢管的方法。钢材以质量％计含有0.03〜0.07％的C，0.01〜0.50％的Si，1.5〜2.5％的Mn，≤0.01％的P，≤0.0030％的S，0.0001〜0.2％的Nb，0.0005〜 0.03％Al，0.003〜0.030％Ti，0.0001〜0.0050％B，余量为不可避免杂质的铁。超高强度线管的变形性和低温韧性优异的钢板的制造方法包括以下步骤：加热钢材; 热轧用水冷却至γ/α转化起点或更高; 重新加热然后用水冷却。版权所有（C）2009，JPO＆INPIT

6. 发明专利

JP2008307594A Uoe steel tube for line pipe excellent in deformability 有权
标题翻译： UOE钢管用于线管优良的可变性
公开(公告)号：JP2008307594A
公开(公告)日：2008-12-25
申请号：JP2007160136
申请日：2007-06-18
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： TSURU EIJI , SHINOHARA YASUHIRO , HARA TAKUYA , ASAHI HITOSHI
IPC分类号： B21C37/08
摘要： PROBLEM TO BE SOLVED: To provide a UOE steel pipe for line pipe, which is suitable for a steel pipe for high strength line pipe which is laid in a discontinuous permafrost zone and is excellent in deformability.
SOLUTION: The UEO steel pipe for line pipe excellent in deformability is characterized in that the tensile strength in the axial direction of pipe is ≥620 MPa and the relationship of a strain-hardening coefficient n from the strain of 1% and uniform elongation in the axial direction of the pipe, a nominal tube diameter D, a nominal thickness t and the coefficient of variation α of the outside diameter of the pipe satisfies expression (1): α=ΔG/D×100, wherein ΔG is difference between the maximum value and the minimum value of the outside diameter of the pipe from the pipe end to 0.7D on the same base line, a=0.0255, b=-0.1476, c=0.2607, d=-0.0217, e=0.0007 and f=-0.0085.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：提供一种用于线管的UOE钢管，其适用于铺设在不连续的永久冻土区并且变形能力优异的用于高强度管线的钢管。
解决方案：可变形性优良的管线用UEO钢管的特征在于，管材的轴向拉伸强度≥620MPa，应变硬化系数n与应变1％的关系均匀管的轴向延伸率，标称管径D，标称厚度t和管的外径的变异系数α满足式（1）：α=ΔG/ D×100，其中ΔG为差在相同的基线上从管端到管道的外径的最大值和最小值之间，a = 0.0255，b = -0.1476，c = 0.2607，d = -0.0217，e = 0.0007， F = -0.0085。版权所有（C）2009，JPO＆INPIT

7. 发明专利

JP2006144037A High strength steel pipe for pipe line having excellent deformation property after aging and its production method 有权
标题翻译：高强度钢管线高强度钢管及其生产方法
公开(公告)号：JP2006144037A
公开(公告)日：2006-06-08
申请号：JP2004332246
申请日：2004-11-16
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： SHINOHARA YASUHIRO , TSURU EIJI , HARA TAKUYA , ASAHI HITOSHI , TERADA YOSHIO , DOI NAOKI , MURATA MASAHIKO
IPC分类号： C22C38/00 , B21B1/26 , B21B1/38 , B21B3/00 , B21C37/08 , B23K9/025 , B23K101/06 , C21D8/10 , C21D9/08 , C22C38/16 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a high strength steel pipe for a pipe line having excellent strength, and further having sufficient deformability even after being subjected to aging by heating in coating treatment or the like, and to provide its production method.
SOLUTION: The high strength steel pipe for a pipe line having excellent deformation properties after aging satisfying an X70 to X100 class in the API standards is obtained by subjecting a steel sheet containing, by mass, 0.02 to 0.09% C, 0.001 to 0.8% Si, 0.5 to 2.5% Mn, ≤0.02% P, ≤0.005% S, 0.005 to 0.03% Ti, 0.005 to 0.3% Nb, 0.001 to 0.1% Al and 0.001 to 0.008% N, and further two or more kinds selected from 0.1 to 1.0% Ni, 0.1 to 1.0% Cu and 0.05 to 0.6% Mo, wherein (Ni+Cu)-Mo>0.5 is satisfied, and the balance iron with inevitable impurities to cold forming into a cylindrical shape, and subjecting the edge faces to seam welding each other. In the steel pipe, after heating at 200 to 300°C, the difference between the flow stress of 2% and the flow stress of 0.5% in the pipe axis direction is ≥30 MPa.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：为了提供一种具有优异强度的管线的高强度钢管，并且即使在涂布处理等中通过加热进行老化之后，还具有足够的变形能力，并提供其制造方法。解决方案：通过在API标准中满足X70至X100等级的具有优异的老化变形特性的管线用高强度钢管，通过将含有0.02〜0.09％C，0.001〜 0.8％Si，0.5〜2.5％Mn，≤0.02％P，≤0.005％S，0.005〜0.03％Ti，0.005〜0.3％Nb，0.001〜0.1％Al和0.001〜0.008％N，还有两种以上选择0.1〜1.0％的Ni，0.1〜1.0％的Cu和0.05〜0.6％的Mo，其中（Ni + Cu）-Mo> 0.5，余量为铁，不可避免的杂质冷成型为圆筒状，边缘面对缝焊。在钢管中，在200〜300℃下加热后，管轴方向的流动应力为2％，流动应力为0.5％的差为≥30MPa。版权所有（C）2006，JPO＆NCIPI

8. 发明专利

JP2005288514A Liquid phase diffusion joining method for steel member with hollow shape having excellent tensile strength and liquid phase diffusion-bonded joint 审中-公开
标题翻译：具有良好拉伸强度和液相扩张接头的中空型钢组件的液相扩散加工方法
公开(公告)号：JP2005288514A
公开(公告)日：2005-10-20
申请号：JP2004109308
申请日：2004-04-01
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： SHINOHARA YASUHIRO , TSURU EIJI , ASAHI HITOSHI
IPC分类号： B23K20/00 , B23K101/06 , B23K103/04
摘要： PROBLEM TO BE SOLVED: To provide a liquid phase diffusion bonding method for steel members with a hollow shape applied to a machine structural component such as a cylinder, and to provide a joint.
SOLUTION: In the liquid phase diffusion bonding method for steel members with a hollow shape having excellent tensile strength, steel members comprising ≥0.3 mass% C, and in which at least either has a hollow shape are subjected to liquid phase diffusion bonding in such a manner that bonding foil comprising, by mass, 2.0 to 4.5% B and 0.1 to 1.0% C, and the balance Fe with impurities is used, and is melted by heating as the parts to be bonded in the steel members are pressurized and held, thereafter, the bonded parts are again heated to the temperature range from an Ac
1 point to (an Ac
1 point+an Ac
3 point)/2 and are held for ≥3 s, so as to be subjected to liquid phase diffusion bonding.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供一种用于机器结构部件如圆筒的中空形状的钢构件的液相扩散接合方法，并提供接头。解决方案：在具有优异拉伸强度的中空型钢构件的液相扩散接合方法中，包括≥0.3质量％C的钢构件，其中至少具有中空形状的钢构件进行液相扩散接合以使用质量分数为2.0〜4.5％，C为0.1〜1.0％的余量的Fe和杂质的接合箔，通过加热而使钢中的待接合部件加压而熔融然后保持接合部分再次被加热至从Ac 1 点到（Ac 1 点+ Ac 3 点）/ 2，并保持≥3秒，以进行液相扩散接合。版权所有（C）2006，JPO＆NCIPI

9. 发明专利

JP2004359991A Method of manufacturing high-strength low-alloy boiler steel of excellent creep characteristic 有权
公开(公告)号：JP2004359991A
公开(公告)日：2004-12-24
申请号：JP2003158137
申请日：2003-06-03
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： MURAKI TARO , ASAHI HITOSHI
IPC分类号： C21D8/02 , C22C38/00 , C22C38/14 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a method for manufacturing boiler steel which has excellent creep characteristics and is used under high-temperature and high-pressure environment with any heat treatment step omitted from the method.
SOLUTION: In the method for manufacturing high-strength low-alloy boiler steel which has excellent creep characteristics, a steel slab containing C, Si, Mn, P, S, O, N and Al of an adequate amount and further containing one or two or more kinds of Nb, V and Ti with the balance Fe with inevitable impurities is heated at 1,100 to 1,280°C, subjected to hot rolling at a temperature of 850 to 1,080°C with the accumulated draft of ≥ 80%, and wound at the temperature of 450 to 630°C after water cooling or air cooling. The steel may further contain one or two or more kinds of Cr, Cu, Ni, Co, Mo, W, B, La, Ca, Y, Ce, Zr, Ta, Hf, Re, Pt, Ir, Pd and Sb.
COPYRIGHT: (C)2005,JPO&NCIPI

10. 发明专利

JP2004298961A Method for manufacturing electric resistance welded steel tube excellent in quality of weld zone 有权
公开(公告)号：JP2004298961A
公开(公告)日：2004-10-28
申请号：JP2004049729
申请日：2004-02-25
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： HAMAYA HIDEKI , FUKAMI SHUNSUKE , MIZUHASHI NOBUO , ISHIZUKA TETSUO , ASAHI HITOSHI , TOKUNAMI YOSHIFUMI , NAKAJI TOMOHIRO , TANIMOTO MICHITOSHI , TAKASHIMA FUTOSHI , OSAWA TAKASHI
IPC分类号： B21C37/08 , B23K13/00
摘要： PROBLEM TO BE SOLVED: To provide a method for manufacturing an electric resistance welded steel tube which can stably and securely decrease defective welding caused by the production of oxides on a weld zone without deteriorating productivity so that the manufactured electric resistance welded steel tube is excellent in the characteristics of the weld zone such as low temperature toughness, corrosion resistance and cold workability.
SOLUTION: In the method for manufacturing the electric resistance welded steel tube, a steel plate is formed into a tubular shape and the end faces to be butted are subjected to electric resistance welding. At the time of the electric resistance welding, high-temperature reducing combustion flame or high-temperature non-oxidizing plasma is blown against the end faces to be butted throughout an area at least from the point of welding to a position 1/5 of the power supplying distance off toward the upstream of welding. The blow velocity is 200 m/s or higher for the high-temperature reducing combustion flame or 30-230 m/s for the high-temperature non-oxidizing plasma.
COPYRIGHT: (C)2005,JPO&NCIPI

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