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41. 发明专利

JP2004122153A The method for enhancing fatigue strength of spot welded joint of high strength steel sheet 审中-公开
公开(公告)号：JP2004122153A
公开(公告)日：2004-04-22
申请号：JP2002287213
申请日：2002-09-30
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： OIKAWA HATSUHIKO , KOBAYASHI JUNICHI
IPC分类号： B23K11/16 , B23K11/11 , B23K11/24
摘要： PROBLEM TO BE SOLVED: To provide a welding method for enhancing fatigue strength of welded joint while ensuring good workability in a spot welding of high strength steel sheet.
SOLUTION: In the method for enhancing the fatigue strength of the welded joint formed by spot welding the high strength steel sheet, the spot welding is carried out specifying bearing pressure at the forward end of electrode when welding, electrode holding time after finishing power supply, and the diameter of nugget.
COPYRIGHT: (C)2004,JPO

42. 发明专利

JP2004122152A Method for enhancing fatigue strength of spot welded joint by ultrasonic shock treatment 有权
公开(公告)号：JP2004122152A
公开(公告)日：2004-04-22
申请号：JP2002287173
申请日：2002-09-30
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： OIKAWA HATSUHIKO , MIYASAKA AKIHIRO , KOBAYASHI JUNICHI
IPC分类号： B23K11/11 , C21D7/00
摘要： PROBLEM TO BE SOLVED: To provide a treating method for enhancing fatigue strength of welded joint while ensuring good workability in a spot welded joint of metal sheet, particularly in the spot welded joint of high strength steel sheet.
SOLUTION: In the method for enhancing the fatigue strength of the welded joint formed by spot welding the metal sheet (the high strength steel sheet), ultrasonic shock treatment is applied to one or both of a nugget portion and a portion around the nugget from both surface or one surface of the welded joint.
COPYRIGHT: (C)2004,JPO

43. 发明专利

JP2003290952A Laser welding method 有权
标题翻译：激光焊接方法
公开(公告)号：JP2003290952A
公开(公告)日：2003-10-14
申请号：JP2002098772
申请日：2002-04-01
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： MIYAZAKI YASUNOBU , KODAMA SHINJI , HAMAYA HIDEKI , FURUSAKO SEIJI , MIYASAKA AKIHIRO , KOBAYASHI JUNICHI
IPC分类号： B23K26/00 , B23K26/04 , B23K26/06 , B23K26/067 , B23K26/14 , B23K26/32 , B23K103/04 , B23K103/16
摘要： PROBLEM TO BE SOLVED: To provide a laser welding method for galvanized steel sheets, a method that enables steel sheets to be welded in a closely stuck state, that prevents explosion of molten metal or generation of weld defect due to vaporization of galvanizing component at the time of laser welding, and that excels in the shape and quality of weld beads. SOLUTION: A laser beam 1 to be emitted to a steel sheet is divided into three beams comprising a front beam 3 on the front side in a welding direction 9 along a weld line 39, a center beam 4 and a rear beam 5 on the rear side in the welding direction. This laser welding method for galvanized steel sheets is characterized in that the power of the front beam 3 is designed to be in a penetration range not less than 25% of the thickness of the first steel sheet but not more than penetration of the entire steel sheet at the time of emission singly by the front beam, and in that the power of the rear beam 5 is decreased by a factor of 0.1 to 1.0 of the power of the center beam 4. The focal position 26 of the beam is arranged at a position either inside or outside the steel sheet from its surface 29 by 0.5-2.5% of the focal distance. COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：为了提供镀锌钢板的激光焊接方法，能够使钢板以紧密卡住的状态进行焊接，防止熔融金属的爆炸或由于镀锌的蒸发而产生焊接缺陷的方法激光焊接时的部件，焊珠的形状和质量优异。解决方案：将要发射到钢板的激光束1分为三个光束，其包括沿着焊接线39在焊接方向9的前侧上的前光束3，中心光束4和后光束5 在焊接方向的后侧。这种镀锌钢板的激光焊接方法的特征在于，前梁3的功率设计成不小于第一钢板的厚度的25％的渗透范围，但不超过整个钢板的穿透在由前梁单独发射的时候，后射束5的功率以中心光束4的功率的0.1至1.0的比例减小。光束的焦点位置26被布置在从钢板表面29的内侧或外侧将焦距定位在0.5-2.5％。版权所有（C）2004，JPO

44. 发明专利

JPH09273221A METHOD OF JOINTING STEEL PILLAR BEAM JOINT HARDLY SUSCEPTIBLE TO BRITTLE FRACTURE 失效
公开(公告)号：JPH09273221A
公开(公告)日：1997-10-21
申请号：JP11055196
申请日：1996-04-08
申请人： NIPPON STEEL CORP
发明人： FURUYA HITOSHI , SHIMANUKI HIROSHI , INOUE TAKEHIRO , KOBAYASHI JUNICHI
IPC分类号： E04B1/24
摘要： PROBLEM TO BE SOLVED: To provide a countermeasure except a method depending upon scallops because brittle fracture resisting characteristic obtained only by improving the scalloped shape is insufficient, in a method joining a long beam to a pillar with a beam connection part fitted with particularly short beam by shop welding at site, in joint of steel pillar with beam of a building steel construction. SOLUTION: In this joint method for a steel pillar with a beam, after constituting a connection part by welding the one end face of a first H-shaped steel beam 4 to the side of a steel pillar 3, the other end face of the first H-shaped steel beam 4 is butted against the one end face of a second H-shaped steel beam 6, the upper and lower faces of both H-shaped steel beam flanges are respectively joined together through spline plates 5 and bolts. In this case, in the length dimension of the flange face of the first H-shaped steel beam 4, the length dimension from the side to the pillar side end face of the splice plate 5 is set over the width dimension of the flange face of the first H-shaped steel beam 4, and joint of the connection part of the steel pillar 3 with the H-shaped steel beam is performed.

45. 发明专利

JPH08247908A CORROSION FATIGUE TEST PIECE AND TESTING METHOD 失效
公开(公告)号：JPH08247908A
公开(公告)日：1996-09-27
申请号：JP5139895
申请日：1995-03-10
申请人： NIPPON STEEL CORP
发明人： OUCHI HIROSHI , KOBAYASHI JUNICHI , KAYAMORI YOICHI
IPC分类号： G01N1/28 , G01N3/32 , G01N3/34
摘要： PURPOSE: To make the coat thickness of a stress concentration part controllable, and to calculate quantitatively the degree of stress concentration of a coated surface test part by a method wherein one groove-shaped through-notch is provided perpendicularly to the length direction in the center in the length direction of one surface of a rectangle and a coating material is applied on the whole of the opposite surface. CONSTITUTION: While a coated test surface 1 is made planar so that a coating material be applied uniformly on a test part 1, one groove-shaped through notch 2 is provided in one surface of a flat plate on the opposite side of the coated surface 1, for the purpose of evaluating corrosion fatigue characteristics of a stress concentration part. Any of an oily material, resin, organic zinc and others may be used as the coating material. Coating may be conducted by any of a brush method, a roller method and the like. A coat thickness (tp) is made to be in the range of 10μm to 10mm generally. The notch 2 is made to be of a U type, a V type, a circular-arc type or the like and the dimension is made to be in the range of 1.5 to 5.0 generally so that a stress concentration factor corresponding to the purpose of an experiment be obtained. A notch depth (d) is made to be in the range of 5 to 90% of the thickness (ts) of a test piece and the radius ρ of curvature of the the fore end in the range of 1mm to a plate thickness. The maximum value of a repeated load is made a yield stress of a material or below so as to prevent plastic deformation. Pins 3 and 3' for four-point bending loading are provided for giving a bending load.

46. 发明专利

JPH06306541A STEEL PLATE FOR GAS-CLEANING EQUIPMENT FOR AMINE ENVIRONMENT USE 失效
公开(公告)号：JPH06306541A
公开(公告)日：1994-11-01
申请号：JP9989393
申请日：1993-04-26
申请人： NIPPON STEEL CORP
发明人： OUCHI HIROSHI , KOBAYASHI JUNICHI , HASHIMOTO KATSUKUNI , TAKEDA TETSUJIRO
IPC分类号： C22C38/00 , C22C38/08 , C22C38/54
摘要： PURPOSE:To provide a steel plate for gas-cleaning equipment, having superior environmentaly propagated craking resistance in an amine environment. CONSTITUTION:This steel plate has a composition consisting of, by weight, 0.05-0.35% C, 0.05-1.0% Si, 0.2-1.5% Mn, =0.035% P, 0.01-0.2% Ni, and the balance Fe with inevitable impurities and further containing, if necessary, one or >=2 kinds among 0.05-0.4% Cu, 0.01-O.5% Mo, 0.01-0.2% V, 0.01-0.1% Ti, 0.01-0.1% Nb, 0.05-0.7% Cr, and 0.0003-0.005% B.

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