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1. 发明专利

JP2006009141A Electric resistance welded tube having excellent cold workability and hardenability and its production method 有权
标题翻译：具有优异的冷加工性和可靠性及其生产方法的电阻焊管
公开(公告)号：JP2006009141A
公开(公告)日：2006-01-12
申请号：JP2005015320
申请日：2005-01-24
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： SAKAMOTO SHINYA , TERADA YOSHIO , NIIYAMA FUMIHIKO , SAWADA SHINYA
IPC分类号： C22C38/00 , C21D9/08 , C21D9/50 , C22C38/04 , C22C38/54
摘要： PROBLEM TO BE SOLVED: To provide an electric resistance welded tube having excellent workability and excellent hardenability by spheroidizing heat treatment in consideration of the fact that workability and the securance of sufficient strength (hardness) by hardening after working are required for a high carbon steel tube for automobiles and machine structures, and to provide its production method.
SOLUTION: The electric resistance welded tube having excellent cold workability and hardenability contains, by mass, 0.25 to 0.50% C, ≤0.35% Si, 0.60 to 1.50% Mn, ≤0.0025% S and ≤0.010% P, and in which the area ratio of cementite with the maximum length of ≤2 μm in the cross-section vertical to the direction of the tube axis is ≥60% to the whole cementite, and further, the diameter of the equivalent circle of the crystal grains of ferrite is ≥5 μm.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：考虑到需要加工性和加工后硬化足够的强度（硬度）以确保高的加工性和保证性，因此提供了通过球化热处理而具有优异的加工性和优异的淬透性的电阻焊管。用于汽车和机械结构的碳钢管，并提供其生产方法。解决方案：具有优异的冷加工性和淬透性的电阻焊管质量分别含有C：0.25〜0.50％C，≤0.35％Si，0.60〜1.50％Mn，≤0.0025％S，≤0.010％P，在垂直于管轴方向的横截面中，最大长度≤2μm的渗碳体的面积比对于整个渗碳体为≥60％，此外，晶粒的当量圆的直径铁氧体≥5μm。版权所有（C）2006，JPO＆NCIPI

2. 发明专利

JP2005330562A Hollow parts superior in fatigue characteristic 有权
标题翻译：中空部件超级疲劳特性
公开(公告)号：JP2005330562A
公开(公告)日：2005-12-02
申请号：JP2004151727
申请日：2004-05-21
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： SAKAMOTO SHINYA , TERADA YOSHIO , NIIYAMA FUMIHIKO
IPC分类号： C21D9/08 , C21D9/50 , C22C38/00 , C22C38/04 , C22C38/54
摘要： PROBLEM TO BE SOLVED: To provide hollow parts having superior fatigue characteristics after having been cold-worked from an electric resistance welded steel pipe into a predetermined shape and high-frequency-hardened, because the parts for automobiles and machine structures are required to have the fatigue characteristics.
SOLUTION: The hollow parts are manufactured by cold-working the electric resistance welded steel pipe including, by mass%, 0.25-0.50% C, 0.35% or less Si, 0.60-1.50% Mn, 0.0025% or less S and 0.010% or less P into the predetermined shape; and have a hardness Hv of 500 or higher over the whole area of the hollow parts after having been high-frequency-hardened, in a wall thickness direction and a circumferential direction. The hollow parts after having been high-frequency-hardened have a hardness difference of 150 or lower by Hv between an outer surface side and an inner surface side. The hollow parts after having been high-frequency-hardened have compression residual stresses of 50 MPa or higher on both of the outer surface and the inner surface.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：为了提供在从电阻焊钢管冷加工成预定形状和高频淬火后具有优异的疲劳特性的中空部件，因为需要汽车和机械结构部件具有疲劳特性。解决方案：中空部件是通过对电阻焊钢管进行冷加工而制造的，其质量比为，含有0.25-0.50％C，0.35％以下的Si，0.60-1.50％的Mn，0.0025％以下的S，以及 0.010％以下的P成为规定的形状; 并且在高频硬化后，在壁厚方向和圆周方向上，在空心部件的整个区域上的硬度Hv为500以上。高频硬化后的中空部分的外表面侧和内表面侧之间的硬度差为150以下Hv。高频淬火后的中空部分在外表面和内表面都具有50MPa以上的压缩残余应力。版权所有（C）2006，JPO＆NCIPI

3. 发明专利

JPH04319022A FORMATION OF HIGH TENSION WELDED STEEL TUBE 失效
公开(公告)号：JPH04319022A
公开(公告)日：1992-11-10
申请号：JP8558791
申请日：1991-04-17
申请人： NIPPON STEEL CORP
发明人： HANEDA KENJI , KIMIYA YASUO , SUMIMOTO DAIGO , NIIYAMA FUMIHIKO
IPC分类号： B21C37/08 , B21D5/12
摘要： PURPOSE:To provide a forming method to stably manufacture a high tension welded tube in a manufacturing line of a welded tube for continuously rolling and welding a strip metal having a prescribed width. CONSTITUTION:In a breakdown roll being a rough forming process an edge part of a steel strip being a material to be formed is bent to the curvature more than a curvature of a product tube and in a breakdown roll on a cluster roll being an intermediate forming process the center part is bent to the cuvature near the curvature of the tube. The forming loading in the fin pass forming being the finish forming process is reduced as small as possible to dissolve the problem of a roll mark. A remarkable improvement of quality of a welded part can be expected by regulating an amount of squeeze of the squeeze rolls to an adequate amount.

4. 发明专利

JPH02249823A AUTOMATIC ALIGNER 失效
公开(公告)号：JPH02249823A
公开(公告)日：1990-10-05
申请号：JP6927289
申请日：1989-03-23
申请人： NIPPON STEEL CORP
发明人： KONDO TETSUMI , ASANUMA TORU , MINAMI HIDEYASU , NIIYAMA FUMIHIKO
IPC分类号： B65G47/06 , B65G47/08 , B65G65/36
摘要： PURPOSE:To solve the problem of overlapping or entangling of object materials as well as to feed them smoothly piece by piece by installing an upper conveyor so as to keep off any advance of these object materials in a state of being overlapped each other or entangled in the upper part of a belt conveyor. CONSTITUTION:A strip body (chain) 1 is hoisted by a hoisting device, and each object material (steel pipe) 7 is hung up by the strip body 1, thereby delivering it to a belt conveyor 16. Next, overlapping and entangling of these object materials themselves during conveyance of the belt conveyor 16 are corrected by rotation of an upper conveyor 17, and the object materials 7 are aligned at each piece.

5. 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

6. 发明专利

JPH05294435A 失效
公开(公告)号：JPH05294435A
公开(公告)日：1993-11-09
申请号：JP10124892
申请日：1992-04-21
申请人： NIPPON STEEL CORP , MISHIMA KOSAN CO LTD
发明人： MINAMI HIDEYASU , OBINATA SHIZUO , NIIYAMA FUMIHIKO , TOKUGAWA HIROSHI , TANAKA TOMOYUKI
IPC分类号： B21B39/00 , B65G19/02 , B65G23/26 , B65G43/08 , B65G47/30 , B65G47/57 , B65G47/78
摘要： PURPOSE:To ensure storage of pipes one by one in dogs and prevent collision and oblique run of the pipes by setting up a speed reducer to allow the pawls of a lift conveyer and the dogs of a ducking conveyer to be always in the same phase. CONSTITUTION:A ducking conveyer 2 and a drive away device such as a lift conveyer 1 right therebefore are driven in mechanical connection and a speed reducer 14 is set up to allow the dogs 4 of the ducking conveyer 2 and the pawls 7 of the lift conveyer 1 to be always in the same phase. A detection plate 17 which has protrusions in number corresponding to the dog pitch and a detector 18 to detect the protrusions are arranged at the end of a lift conveyer drive shaft 6 so that a clutch brake on the ducking conveyer can be controlled timings of detecting the protrusions of the detection plate 17 by the detector 18 when the lift conveyer is actuated.

7. 发明专利

JPH05116738A AUTOMATIC LINE-UP DEVICE 失效
公开(公告)号：JPH05116738A
公开(公告)日：1993-05-14
申请号：JP12394791
申请日：1991-05-28
申请人： NIPPON STEEL CORP
发明人： NIIYAMA FUMIHIKO , KUMANO SHIGERU , MINAMI HIDEYASU
IPC分类号： B65G11/20 , B65G47/04 , B65G47/14 , B65G47/88 , B65G57/18
摘要： PURPOSE:To automatically line up a number of object members such as steel pipes each having a circular section without intervention of human power. CONSTITUTION:A vibration skid 3 for applying vibration to a material 1 by means of a vibrator 2 and a turn-down type stopper 4 for pressing the material 1 are provided so that the material 1 can be delivered by several pieces at a time while eliminating mutual entanglement of the material 1. Further, in the rear of them, a transport conveyor 6 and an upper conveyor 12 or a roller are provided for correcting stacking of the material 1 so that several pieces of delivered materials can be lined up one by one. Human power has been conventionally required for eliminating mutual entanglement of materials, however, this work can be thereby automated to eliminate dangerous manual work.

8. 发明专利

JPH02173562A METHOD AND DEVICE FOR ULTRASONIC FLAW DETECTION FOR STEEL PIPE 失效
公开(公告)号：JPH02173562A
公开(公告)日：1990-07-05
申请号：JP32794288
申请日：1988-12-27
申请人： NIPPON STEEL CORP , NITTETSU TEKUNOSU KK
发明人： HORIKOSHI KIYOMI , NIIYAMA FUMIHIKO , KAWAMURA KOJI
IPC分类号： G01N29/04
摘要： PURPOSE:To efficiently execute the flaw detection of electric resistance welded tubes having the same outside diameter and different wall thickness by allowing and ultrasonic wave to be made incident from the outside wall surface of the tube and propagating it in the tangential direction. CONSTITUTION:Ultrasonic wave generators U1, U2, U3 and U4 of a flaw detector are housed in an enveloped body filled with water, and an ultrasonic wave is made incident from the outer wall surface of an electric resistance welded tube 28. Subsequently, the incident angle is set so that the propagation direction at the time of refraction becomes the tangential direction of the tube 28, and the arrangement interval is set so that the tube 28 is irradiated by an ultrasonic wave at an equal interval along a weld zone W of the tube 28. In this state, a receiving means receives a reflected echo of the ultrasonic wave, a comparing means compares the reflected echo by a prescribed threshold, a recording means records the result of comparison, and a sensitivity changing means changes sensitivity of the receiving means in accordance with wall thickness of the tube. According to such a constitution, even if a droplet of soluble oil adheres to the inside surface of the tube, it does not occur that the adhering part is misconceived as a defective part, and also, even if wall thickness of the tube is different, if the outside diameter is the same, the flaw detection is executed without necessitating to change setting a position of the ultrasonic wave generator and the work efficiency of flaw detective can be improved.

9. 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

10. 发明专利

JP2004144176A Cap for protecting pipe end and pipe having it 审中-公开
公开(公告)号：JP2004144176A
公开(公告)日：2004-05-20
申请号：JP2002308908
申请日：2002-10-23
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： NIIYAMA FUMIHIKO , ENOMOTO KUNIHIRO , TAKAHATA ISAO
IPC分类号： F16L57/00 , F16L55/00
摘要： PROBLEM TO BE SOLVED: To provide a cap for protecting a pipe end that is tightly mounted during mounting to the pipe, does not easily remove during midway transportation, and can tightly close the inside of the pipe to some extent.
SOLUTION: The cup-type cap for protecting the pipe end is mounted so as to cover the outside of the end of the pipe while disposing a part corresponding to an opening of the cap on the pipe center side and a part corresponding to the bottom on the pipe end side. Thanks to one of the following structures [1] to [3], mounting force is increased and removal is facilitated. [1] A cut line is previously formed from the opening toward the bottom in a peripheral wall of the cap, and a seal tape is adhered to the outside of the peripheral wall so as to cover the cut line. [2] On the peripheral wall of the cap, thickness of the part is thinned so as to cut the part by manually pulling it outward from the opening to the bottom. [3] A perforation is formed in the peripheral wall of the cap so as to cut the part by manually pulling it outward from the opening to the bottom.
COPYRIGHT: (C)2004,JPO

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