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1. 发明专利

JP2011214145A Plated steel material and steel pipe having high corrosion resistance and excellent workability, and method for producing the same 有权
标题翻译：具有高耐腐蚀性和优异的可加工性的镀钢材和钢管及其制造方法
公开(公告)号：JP2011214145A
公开(公告)日：2011-10-27
申请号：JP2011056629
申请日：2011-03-15
申请人： Kowa Industry Co Ltd , Nippon Steel Corp , 新日本製鐵株式会社 , 株式会社興和工業所
发明人： TERADA YOSHIO , FUNATSU SHINICHI , HONDA KAZUHIKO , MIMURA HIROYUKI , KAYAZONO YOSHIHISA , YAMADA WATARU , SUEHIRO ATSUO , YASUDA KAZUO , TSUNODA HARUHIKO
IPC分类号： C23C2/06 , C22C18/00 , C22C18/04 , C22C38/00 , C22C38/06 , C23C2/02 , C23C2/12
摘要： PROBLEM TO BE SOLVED: To provide a hot-dip galvanized steel material which has high corrosion resistance and has excellent plating adhesion upon working by optimizing the structure of a plating layer and thickness of a lower layer in a two-step plating process where the surface of the steel is subjected to hot-dip galvanizing, and is thereafter subjected to hot-dip Zn-Al-Mg alloy plating, and to provide a method for producing the hot-dip galvanized steel material.SOLUTION: The surface of the steel material includes: an Fe-Al alloy layer having a thickness of 0.01-1.5 μm as a lower layer; an alloy layer as an intermediate layer formed on the Fe-Al alloy layer and comprising, by mass%, 4-20% Al, 0.1-15% Fe, 0.1-5% Mg and the balance Zn with inevitable impurities; and an alloy layer as an upper layer formed on the intermediate layer and comprising 4-20% Al, 0.1-5% Mg and the balance Zn with inevitable impurities.
摘要翻译：要解决的问题：提供一种具有高耐腐蚀性并且在两步电镀工艺中优化电镀层的结构和下层厚度的工作时具有优异的电镀附着力的热浸镀锌钢材，其中表面对钢进行热浸镀锌，然后进行热浸Zn-Al-Mg合金镀覆，并提供一种生产热浸镀锌钢材的方法。解决方案：钢材表面包括：作为下层的厚度为0.01〜1.5μm的Fe-Al合金层; 形成在Fe-Al合金层上的中间层的合金层，以质量％计含有4〜20％的Al，0.1〜15％的Fe，0.1〜5％的Mg，余量为的Zn含有不可避免的杂质; 以及形成在中间层上的合金层作为上层，其中含有4-20％的Al，0.1-5％的Mg，其余的Zn含有不可避免的杂质。

2. 发明专利

JP2006315045A Method for manufacturing strength member for automobile 审中-公开
标题翻译：制造汽车强度成员的方法
公开(公告)号：JP2006315045A
公开(公告)日：2006-11-24
申请号：JP2005140805
申请日：2005-05-13
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： SAKAMOTO SHINYA , TERADA YOSHIO , KOYUMIBA MOTOFUMI , NIIYAMA FUMIHIKO , SAWADA SHINYA
IPC分类号： B21C1/00 , C22C38/00 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a method for manufacturing a strength member for an automobile, having high bending reaction force at the initial stage of collision and having a cross section shape enabling the reduction of its manufacturing cost and weight. SOLUTION: The method is for manufacturing a square steel tube having a square cross section, wherein a square steel tube having a tensile strength of ≥690 MPa and a square cross section is manufactured by cold-drawing a round steel tube. In the method, a round steel tube having a tensile strength of ≥590 MPa is used, and the outer peripheral length reduction Or is 10-40%, as shown in the formula (1) as follows: 10≤Or=[(L 0 -L)/L 0 ]×100≤40 (wherein, L 0 is the outer peripheral length (mm) of the round steel tube before cold drawing; and L is the outer peripheral length (mm) of the square steel tube after cold drawing). COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：解决的问题：提供一种用于制造汽车强度部件的方法，在碰撞的初始阶段具有高的弯曲反作用力，并且具有能够降低其制造成本和重量的横截面形状。解决方案：该方法用于制造具有正方形横截面的方形钢管，其中通过冷拉圆钢管制造拉伸强度≥690MPa的正方形钢管和方形横截面。在该方法中，使用拉伸强度≥590MPa的圆钢管，如式（1）所示，外周长度的减小量为10-40％，如下所示：10≤Or= [（L 0 -L）/ L 0 ]×100≤40（其中，L 0 是圆钢的外周长冷拔前的管; L是冷拔后的方钢管的外周长（mm）。版权所有（C）2007，JPO＆INPIT

3. 发明专利

JP2006281303A Submerged arc welding method for high strength steel sheet 有权
标题翻译：用于高强度钢板的焊接弧焊方法
公开(公告)号：JP2006281303A
公开(公告)日：2006-10-19
申请号：JP2005107989
申请日：2005-04-04
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： MORIMOTO YUTAKA , SHINADA KOICHI , YOSHIDA TATSUYA , TERADA YOSHIO , HARA TAKUYA
IPC分类号： B23K9/18 , B23K35/30 , B23K35/362 , B23K103/04 , C22C38/00 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a submerged arc welding method for a high strength steel sheet where, when a high strength steel sheet having a tensile strength of 700 to 1,200 MPa is subjected to submerged arc welding, a weld metal having high strength satisfying the tensile strength of 700 to 1,200 MPa which is equal to that of the steel sheet can be obtained, and also, a weld joint in which the defect of cracks generated at the toe parts of a weld bead is prevented, and which is free from defects, is sound and has excellent mechanical strength such as strength and fatigue strength can be obtained.
SOLUTION: In the method where a high strength steel sheet having the tensile strength of 700 to 1,200 MPa is subjected to submerged arc welding using filling flux and a welding wire, using the flux having a particle distribution in which fine particles with the particle diameter of ≤210 μm are comprised by 5 to 60 mass%, a weld metal in which the ratio of the volume of a deposited metal (Vd) to the volume in a bevel per unit length of a weld bead (Vg), (Vd/Vg) is 1.05 to 3.00, and also having the tensile strength of 700 to 1,200 MPa is formed in the bevel.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：为了提供一种高强度钢板的埋弧焊接方法，其中当对具有700至1200MPa的拉伸强度的高强度钢板进行埋弧焊时，具有高的可以获得满足与钢板相同的700〜1200MPa的拉伸强度的强度，也可以获得防止在焊缝的趾部产生的裂纹的缺陷的焊接接头，无缺陷，声音良好，机械强度优异，可获得强度和疲劳强度。解决方案：使用具有700〜1200MPa的拉伸强度的高强度钢板，使用填充焊剂和焊丝进行埋弧焊的方法中，使用具有粒子分布的助熔剂，其中微粒与 ≤210μm的粒径为5〜60质量％，焊接金属（其中沉积金属的体积比（Vd））与焊道单位长度的斜面（Vg）的比例（Vg），（ Vd / Vg）为1.05〜3.00，在斜面上也形成了拉伸强度为700〜1200MPa。版权所有（C）2007，JPO＆INPIT

4. 发明专利

JP2005305459A Method for working welded joint comprising weld metal having satisfactory low temperature toughness 审中-公开
标题翻译：焊接接头焊接接头的方法具有满意的低温韧性焊接金属
公开(公告)号：JP2005305459A
公开(公告)日：2005-11-04
申请号：JP2004122239
申请日：2004-04-16
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： MORIMOTO YUTAKA , OKITA SHIGERU , TERADA YOSHIO , HARA TAKUYA
IPC分类号： B23K9/23 , B23K31/00 , B23K35/30 , B23K103/04 , C21D9/50 , C22C38/00 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a method for working a welded joint comprising a weld metal having satisfactory low temperature toughness, after the performance of welding applied in the case an actual welded structure is produced, by forming a welded joint as well, thus suppressing the strain age hardening of a weld metal generated in a welded joint to be subjected to heat treatment, and reducing deterioration in its toughness caused thereby.
SOLUTION: In the method for working a welded joint comprising a weld metal having satisfactory low temperature toughness, a weld metal having a composition comprising, by mass, 0.03 to 0.09% C, 0.08 to 0.4% Si, 1.0 to 2.3% Mn, 0.005 to 3.3% Ni, 0.005 to 1.5% Cr and 0.005 to 2% Mo, and in which Pcw value defined by formula (1) satisfies 0.2 to 0.8, and the balance Fe with inevitable components is formed on the weld zone in a welded joint, the welded joint is subjected to heating treatment under the conditions satisfying a heating temperature of 50 to 450°C and a holding time of ≥1 s, and thereafter, the welded joint is formed, and is heat-treated.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：为了提供一种包括具有令人满意的低温韧性的焊接金属的焊接接头的方法，在制造实际焊接结构的情况下施加焊接之后，还通过形成焊接接头从而抑制在要进行热处理的焊接接头中产生的焊接金属的应变时效硬化，并减少由此引起的韧性的劣化。解决方案：在包括具有令人满意的低温韧性的焊接金属的焊接接头的加工方法中，具有质量为0.03〜0.09％的C，0.08〜0.4％的Si，1.0〜2.3％ Mn，0.005〜3.3％的Ni，0.005〜1.5％的Cr和0.005〜2％的Mo，其中由式（1）定义的Pcw值满足0.2〜0.8，在焊接区上形成余量为不可避免的成分焊接接头，在满足加热温度为50〜450℃，保持时间≥1s的条件下对焊接接头进行加热处理，然后形成焊接接头，进行热处理。版权所有（C）2006，JPO＆NCIPI

5. 发明专利

JP2004332083A Method for producing high-strength bent pipe excellent in low-temperature toughness 有权
公开(公告)号：JP2004332083A
公开(公告)日：2004-11-25
申请号：JP2003132593
申请日：2003-05-12
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： TERADA YOSHIO , DOI NAOKI
IPC分类号： B21D7/00 , C21D8/10 , C22C38/00 , C22C38/14 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a method for producing a bent pipe having a high strength of X80 to X100 and being excellent in low-temperature toughness at a welded metallic part.
SOLUTION: The method comprises heating a steel pipe having a low-C, low-Si, trace Nb, trace T base material and a welded metallic part with a considered balance among Al, N, oxygen, and Ti amounts to 850 to 950°C, hardening the pipe while bending it, and tempering the hardened pipe at the Ac1 temperature or lower. According to this method, it is possible to stably produce a high-strength bent pipe (X80-X100 or higher as measured according to API specification) excellent in the low-temperature toughness of the base material and the welded metallic part and to improve the transportation efficiency of pipelines.
COPYRIGHT: (C)2005,JPO&NCIPI

6. 发明专利

JP2004315858A Steel member with excellent impact characteristic 审中-公开
公开(公告)号：JP2004315858A
公开(公告)日：2004-11-11
申请号：JP2003108859
申请日：2003-04-14
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： SAKAMOTO SHINYA , TERADA YOSHIO , HIWATARI SHUNJI
IPC分类号： B62D25/04 , B60J5/00 , B62D21/02 , B62D25/20 , C22C38/00
摘要： PROBLEM TO BE SOLVED: To provide a steel member which is subjected to impacts from specific directions and has excellent impact characteristics. SOLUTION: The steel member with excellent impact characteristics has ≥1.0 Lankford value (r-value) in an impact direction 2. In the steel member with excellent impact characteristics, the r-value in the impact direction 2 takes a value higher by ≥0.2 than the average r-value. In the case where a direction 3 from which an impact comes is an axial direction 4 of the steel member 1, the impact direction 2 is the axial direction 4 of the steel member 1. In the case where the direction 3 from which an impact comes is a direction perpendicular to the axial direction 4 of the steel member 1, the impact direction 2 is a peripheral direction 5 of the steel member 1. The r-value in the impact direction 2 can be elevated by regulating a rolling direction 18 of a rolled steel sheet 11 constituting the steel member 1 so that it obliques with respect to the axial direction 4 of the steel member 1. COPYRIGHT: (C)2005,JPO&NCIPI

7. 发明专利

JP2004314102A Tailored tube, and method for manufacturing the same 审中-公开
公开(公告)号：JP2004314102A
公开(公告)日：2004-11-11
申请号：JP2003108860
申请日：2003-04-14
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： SAKAMOTO SHINYA , TERADA YOSHIO , OSAWA TAKASHI , SAWADA SHINYA
IPC分类号： B21C37/06 , B21C37/14 , B21D53/88
摘要： PROBLEM TO BE SOLVED: To provide a tailored tube capable of eliminating the instability of a butt welding and also eliminating a sudden change in the material in the axial direction of a pipe, and to provide a method for manufacturing the tailored tube.
SOLUTION: This tailored tube is obtained by performing the tailored welding of a plurality of steel plates different in one or both of material and thickness and has at least two tailored weld lines. The first tailored weld line 4 is inclined in the axial direction of the tube, the second tailored weld line 5 is parallel to the axial direction of the tube and the ends of every two tailored weld lines are situated at a tube end 11. In the manufacturing method, the base stock 9 for the steel tube having the first tailored weld line 4 is made by performing the tailored welding of the plurality of the steel plates which are different in one or both of the material and the quality, the base stock 9 for the steel tube is formed into a tubular shape by pressing and roll bending and the steel tube having the second tailored weld line 5 is made by welding butting parts 10.
COPYRIGHT: (C)2005,JPO&NCIPI

8. 发明专利

JP2004148384A Manufacturing method of uoe steel tube having excellent seam welding strength characteristic and internal pressure fatigue characteristic 有权
公开(公告)号：JP2004148384A
公开(公告)日：2004-05-27
申请号：JP2002318082
申请日：2002-10-31
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： TSURU EIJI , HARA TAKUYA , ASAHI HITOSHI , TERADA YOSHIO
IPC分类号： B21C37/08 , B23K31/00 , C21D7/06
摘要： PROBLEM TO BE SOLVED: To provide a method for manufacturing a UOE steel tube of excellent seam welding strength characteristic and internal pressure fatigue characteristic for stabilizing the strength of a seam-welded portion and a HAZ of the high strength UOE steel tube, and enhancing the internal pressure fatigue strength of the UOE steel tube for general purpose use.
SOLUTION: In a UOE steel tube manufacturing method in which a steel plate is successively subjected to C-forming, U-forming, and O-forming, end portions of the steel plate are seam-welded to each other, and a tube is expanded, at least a seam-weld toe portion after the expansion is subjected to peening by the ultrasonic vibration.
COPYRIGHT: (C)2004,JPO

9. 发明专利

JP2003306742A 490 N/mm2 CLASS STEEL HAVING EXCELLENT FIRE RESISTANCE AND PRODUCTION METHOD THEREOF 有权
标题翻译： 490 N / mm2级钢，具有良好的耐火性及其生产方法
公开(公告)号：JP2003306742A
公开(公告)日：2003-10-31
申请号：JP2002115704
申请日：2002-04-18
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： CHIJIIWA RIKIO , TERADA YOSHIO , MIZUTANI YASUSHI
IPC分类号： C21D8/02 , C22C38/00 , C22C38/28
摘要： PROBLEM TO BE SOLVED: To provide 490 N/mm
2 class steel which has excellent fire resistance at 700°C and 800°C and is used for various buildings in the field of civil engineering and construction, and to provide a production method thereof.
SOLUTION: In Mo-Nb-V based steel, the other alloy elements are controlled, and the microstructure is formed of ferrite-pearlite, so that its strength at ordinary temperatures, 700°C and 800°C is secured. At first, for forming the microstructure of ferrite-pearlite, Ceq* as a newly found parameter shown by the following formula is controlled to 0.2 to 0.4, equivalent amounts of Mo, Nb and V are added, and the steel is subjected to high temperature heating and high temperature rolling to form into the steel in the invention: Ceq*=C +1/8.6Si+1/6.1Mn+1/8Mo+1/1.6Nb+1/1.8V+1/2.9Ti+1/2.4Al-31.4N.
COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：提供在700℃和800℃下具有优异耐火性的490N / mm 2 级钢，用于土木工程领域的各种建筑物并提供其制造方法。解决方案：在Mo-Nb-V基钢中，其他合金元素被控制，微结构由铁素体 - 珠光体形成，从而确保其在700℃和800℃的常温下的强度。首先，为了形成铁素体 - 珠光体的微观结构，将Ceq *作为下述公式所示的新发现参数控制在0.2〜0.4，加入等量的Mo，Nb和V，并对钢进行高温加热和高温轧制形成本发明的钢：Ceq * = C + 1 / 8.6Si + 1 / 6.1Mn + 1 / 8Mo + 1 / 1.6Nb + 1 / 1.8V + 1 / 2.9Ti + 1 / 2.4Al-31.4N。版权所有（C）2004，JPO

10. 发明专利

JP2003293078A Steel pipe having excellent weld heat affected zone toughness and deformability and method of producing steel sheet for steel pipe 有权
标题翻译：具有优良焊接热影响区域韧性和可变性的钢管以及钢管钢板生产方法
公开(公告)号：JP2003293078A
公开(公告)日：2003-10-15
申请号：JP2002096552
申请日：2002-03-29
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： TERADA YOSHIO , HARA TAKUYA
IPC分类号： C21D8/02 , C22C38/00 , C22C38/14 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a high strength steel pipe of ≥X100 which has satisfactory HAZ (heat affected zone) toughness and excellent deformability, and to provide a production method thereof.
SOLUTION: As a base metal of the steel pipe, in the amounts of alloy elements to be added, Pb value defined by the formula of Pb=2.7C+0.4Si+Mn+0.8Cr+0.45(Ni+Cu)+Mo+V is controlled to the range of 2.5 to 4.0 to extra low C-Nb-Ti based components. Also, as a weld metal, the content of C is controlled to 0.035 to 0.09% from the viewpoint of preventing high temperature craking, and, in the amounts of alloy elements to be added satisfying strength, Pw value defined by the formula of Pw=C+0.11Si+0.03Mn+0.02Ni+0.04Cr+0.07Mo+1.46Nv is controlled to the range of 0.2 to 0.35.
COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：提供具有令人满意的HAZ（热影响区）韧性和优异的变形性的≥X100的高强度钢管，并提供其制造方法。
解决方案：作为钢管的基体金属，以添加的合金元素的量，Pb = 2.7C + 0.4Si + Mn + 0.8Cr + 0.45（Ni + Cu）定义的Pb值， + Mo + V控制在2.5〜4.0的范围内，成为超低C-Nb-Ti成分。此外，作为焊接金属，从防止高温断裂的观点来看，将C的含量控制在0.035〜0.09％，并且在合金元素的添加量满足强度的情况下，由Pw = C + 0.11Si + 0.03Mn + 0.02Ni + 0.04Cr + 0.07Mo + 1.46Nv控制在0.2〜0.35的范围内。版权所有（C）2004，JPO

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