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1. 发明专利

JP2005112031A Reinforcing member for automobile 有权
标题翻译：加固汽车会员
公开(公告)号：JP2005112031A
公开(公告)日：2005-04-28
申请号：JP2003345626
申请日：2003-10-03
申请人： Nippon Steel Corp , Nissan Motor Co Ltd , 新日本製鐵株式会社 , 日産自動車株式会社
发明人： SAKAMOTO SHINYA , TERADA YOSHIO , KOYUMIBA MOTOFUMI , NIIYAMA FUMIHIKO , NAKANISHI EIZABURO , ONO KIMIMOTO
IPC分类号： B60J5/00 , B60J5/04 , B60R21/02 , B62D21/15 , B62D29/00 , C21D8/06
CPC分类号： B60J5/0444 , B60R21/02 , B62D21/157 , B62D29/007 , Y10T29/49622
摘要： PROBLEM TO BE SOLVED: To provide a reinforcing member for an automobile, having high bending reaction force at the initial stage of collision and also having a sectional form to reduce the manufacturing cost and the weight. SOLUTION: This reinforcing member for an automobile is a square steel pipe having a square section, satisfying the following expressions (1) to (3) and having strength such as tensile strength of 690 MPa or more. The expression (1) is R 1 ≤1.5t, the expression (2) is t R ≥1.1t, and R 1 ≥R 2 , wherein t is the board thickness (mm) of a side, t R is the board thickness of the corner, R 1 is an outside corner (mm), and R 2 is an inner corner R(mm). Further, preferably the maximum value and the minimum value of hardness in the section of the square steel pipe are both in the range of ±30% of the average value in the whole section. COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：提供一种在碰撞的初始阶段具有高弯曲反作用力的汽车用增强构件，并且还具有降低制造成本和重量的截面形状。解决方案：该汽车用增强构件是具有正方形截面的方钢管，满足下列表达式（1）至（3），并具有690MPa以上的拉伸强度等强度。表达式（1）为R ≤1.5t，表达式（2）为t R ≥1.1t，R 1 ≥R 2 ，其中t是侧面的板厚度（mm），t R 是角部的板厚度，R SB = 1 外角（mm），R 2 是内角R（mm）。此外，优选方形管的截面中的最大值和最小值的硬度都在整个区段的平均值的±30％的范围内。版权所有（C）2005，JPO＆NCIPI

2. 发明专利

JP2002284033A STRENGTH MEMBER FOR AUTOMOBILE 失效
公开(公告)号：JP2002284033A
公开(公告)日：2002-10-03
申请号：JP2001089080
申请日：2001-03-27
申请人： NIPPON STEEL CORP , NISSAN MOTOR
发明人： SAKAMOTO SHINYA , SUMIMOTO DAIGO , TERADA YOSHIO , KURIYAMA YUKIHISA , SAKURAI HIROSHI , NAKANISHI EIZABURO
IPC分类号： B21C1/22 , B21C37/15 , B21D26/033 , B21D53/88 , B62D21/00 , B62D21/09 , B62D21/15 , B62D25/00 , B62D25/20 , F16F7/12 , B21D26/02
摘要： PROBLEM TO BE SOLVED: To provide a strength member for an automobile being light in weight, having excellent shaft collapse performance and high bending strength performance, and capable of preventing the occurrence of a crack even when using a high strength steel plate. SOLUTION: This long strength member 1 for the automobile is constituted such that it has cutout parts 3 at four corners of a basic rectangular cross section 2 and a cross-shaped closed cross section on the whole, a plate thickness of the cutout part 3 is thicker than a plate thickness of parts other than the cutout part, namely, a side wall 4 and a top wall 5 by 5 to 30%, and a hardness of the cutout part 3 is larger than a hardness of parts other than the cutout part, namely, the side wall 4 and the top wall 5 by 5% or more. Furthermore, the strength member 1 is formed by drawing or hydroforming.

3. 发明专利

JP2005112032A Reinforcing member for automobile 有权
标题翻译：加固汽车会员
公开(公告)号：JP2005112032A
公开(公告)日：2005-04-28
申请号：JP2003345627
申请日：2003-10-03
申请人： Nippon Steel Corp , Nissan Motor Co Ltd , 新日本製鐵株式会社 , 日産自動車株式会社
发明人： SAKAMOTO SHINYA , TERADA YOSHIO , KOYUMIBA MOTOFUMI , NAKANISHI EIZABURO , ONO KIMIMOTO
IPC分类号： B60J5/00
摘要： PROBLEM TO BE SOLVED: To provide a reinforcing member for an automobile, exhibiting bending characteristic more excellent than before.
SOLUTION: This reinforcing member for an automobile is a square pipe, which is characterized in that the outer sectional form is square or oblong, the outside of the corner part is not rounded, or rounded equal to or smaller than five times as large as the thickness, and the inner sectional form is a complete round concentric with the outer section, or an ellipse concentric with the outer section and having a central axis parallel to a side of the outer section.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：提供一种汽车用增强件，具有比以前更优异的弯曲特性。解决方案：用于汽车的该加强构件是方管，其特征在于，外截面形状是正方形或长方形，角部的外侧不是圆形，或者圆形等于或小于五倍内部截面形状与外部部分同心的完整圆形，或与外部部分同心且具有平行于外部部分侧面的中心轴线的椭圆形。版权所有（C）2005，JPO＆NCIPI

4. 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

5. 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

6. 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

7. 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

8. 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

9. 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

10. 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

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