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31. 发明专利

JPH1099595A STAINLESS STEEL CLOTHES-DRYING BAR AND MANUFACTURE THEREOF 失效
公开(公告)号：JPH1099595A
公开(公告)日：1998-04-21
申请号：JP25801796
申请日：1996-09-30
申请人： NISSHIN STEEL CO LTD
发明人： NAKAKO TAKEFUMI , INOUE SHOJI , NAKAYASU KAZUHIKO , KITAOKA TAKEO , FUJIMOTO HIROSHI , MIYAKUSU KATSUHISA , MUNEI YOSHIO
IPC分类号： C21D6/00 , C22C38/00 , D06F57/00
摘要： PROBLEM TO BE SOLVED: To provide a stainless steel clothes-drying bar which is made very strong and has a good flexure resistance. SOLUTION: This clothes-drying bar is constituted of a high strength stainless steel pipe which includes 20-95vol.% of martensite which is made by cold-rolling chrome stainless steel and heating it to an (α+γ) two-phase region of Ac1 or above and then rapidly cooling it at the rate of at least I deg.C/second, with the rest part of it being substantially ferrite and which has a ferritet martensite multiphase structure of a 0.2% proof stress of at least 400MPa. As for a method for manufacturing the pole, a stainless steel band is formed into a pipe by a roll-less forming method after it is heat-treated and then the welded pipe is cut to size to obtain a wash-line pole. Due to the ferrite+martensite multiphase structure, the pipe can be made very strong without any deterioration in Young's modulus and flexural rigidity and therefore can be made thin for a clothes-drying bar.

32. 发明专利

JPH1052777A LASER BEAM WELDING OF PLATED STEEL SHEET AND STAINLESS STEEL SHEET 失效
公开(公告)号：JPH1052777A
公开(公告)日：1998-02-24
申请号：JP22583496
申请日：1996-08-07
申请人： NISSHIN STEEL CO LTD
发明人： INOUE SHOJI , FUKUMURA KATSUHIKO , NOBUTOKI TOMOKAZU
IPC分类号： B23K26/32 , B23K26/21 , B23K103/18 , C23C2/06 , B23K26/00
摘要： PROBLEM TO BE SOLVED: To form a weld zone capable of bending after welding at the case of laser beam welding a plated steel sheet and stainless steel sheet. SOLUTION: In the case of laser beam welding the plated steel sheet and stainless steel sheet without a filler wire, the end surfaces of the plated steel sheet and the austenitic stainless steel sheet, whose carbon equivalent Ceq of the original sheet calculated with the formula Ceq =%C+%Mn/6+%Si/24+%Ni/24+%Cr/5+%Mo/4 is

33. 发明专利

JPH09242391A FIXING TOOLS FOR MUTUAL BEAMS AND COLUMN AND BEAM IN BALUSTRADE AND PROTECTION FENCE 失效
公开(公告)号：JPH09242391A
公开(公告)日：1997-09-16
申请号：JP5035596
申请日：1996-03-07
申请人： NISSHIN STEEL CO LTD
发明人： NISHIO KATSUHIDE , AZUMA TSUTOMU , INOUE SHOJI
IPC分类号： E04F11/18 , E04H17/14
摘要： PROBLEM TO BE SOLVED: To fix columns and beams easily and attractively in looking, by providing brackets having a shape corresponding to the external form of the beams at the upper both sides of a fixing tools body inserted in the inside of pipe columns. SOLUTION: Holes 5 are formed at both sides of a square-cylindrical fixing tools body 3 and curved brackets 4 corresponding to the external shape of a beam are integrally formed at the upper end of the fixing tools body. Then, guide holes 5A are formed on the brackets 4. The fixing tools body 3 is inserted in the inside of a column and fixed thereto with fixing bolts. Subsequently, the beam is connected to respective brackets 4 through sleeves and fixing bolts are inserted to pierce the sleeves and the beams, the sleeves, and brackets 4 through the guide holes 5A and integrally fixed together. In this way, the external appearance is improved and the executing efficiency can be increased.

34. 发明专利

JPH09122915A WELDING METHOD TO PREVENT DUCTILE FRACTURE OF FERRITIC STAINLESS STEEL 失效
公开(公告)号：JPH09122915A
公开(公告)日：1997-05-13
申请号：JP30848395
申请日：1995-11-02
申请人： NISSHIN STEEL CO LTD
发明人： OKU MANABU , FUJIMURA YOSHIYUKI , UEMATSU YOSHIHIRO , INOUE SHOJI , FUKUMURA KATSUHIKO
IPC分类号： B23K9/23 , B23K9/095 , B23K31/00 , B23K103/04 , C22C38/00 , C22C38/28
摘要： PROBLEM TO BE SOLVED: To prevent generation of ductile fracture with excellent reproducibility, in welding ferritic stainless steel. SOLUTION: In welding a ferritic stainless steel which contains, in mass percentage 0.03% or less C, 2.0% or less Si, 2.0% or less Mn, 5.0-30.0% Cr, and 0.03% or less N, and which contains one or more kind of 0.05-1.0% Nb, 0.05-1.0% Ti, 0.05-3.0 Mo, and 0.02-1.0% Cu, with the balance Fe and impurities, the highest achievable temperature on the rear of a weld zone during welding is set lower than the melting point of that steel by 100 deg.C or more, and also, the penetration ratio (%) defined in the following equation is set in the range of 20-80%: penetration ratio (%) = penetration depth/thickness of base stock to be welded × 100.

35. 发明专利

JPH07286239A FERRITIC STAINLESS STEEL EXCELLENT IN LASER WELDABILITY 失效
公开(公告)号：JPH07286239A
公开(公告)日：1995-10-31
申请号：JP10448394
申请日：1994-04-20
申请人： NISSHIN STEEL CO LTD
发明人： ASADA HIROSHI , SOGA SATOSHI , INOUE SHOJI
IPC分类号： C22C38/00 , B23K26/32 , B23K103/04 , C22C38/18 , C22C38/22 , C22C38/28 , C22C38/38
摘要： PURPOSE:To suppress the formation of nonmetallic inclusions such as oxides and nitrides precipitated in the laser-weld zone and to improve the toughness of the weld zone by regulating the contents of C, N and O in the base metal in specified correlation. CONSTITUTION:This steel is a ferritic stainless steel contg., by weight, pieces/mm or below. Moreover, as for the contents of Si, Mn, Ti and Nb in the steel,

36. 发明专利

JPH04197517A MANUFACTURE OF WELDED PLATED STEEL PIPE 失效
公开(公告)号：JPH04197517A
公开(公告)日：1992-07-17
申请号：JP32645090
申请日：1990-11-28
申请人： NISSHIN STEEL CO LTD
发明人： INOUE SHOJI , FUKUMURA KATSUHIKO , NAKAKO TAKEFUMI
IPC分类号： B21C37/08 , B21D5/12
摘要： PURPOSE:To obtain a plated steel pipe having excellent surface characteristic by executing bending work to a plated steel strip to give bending stress in width-wise direction, curling this to the width-wise direction to make cylindrical- state and butt-welding both end parts. CONSTITUTION:The plated steel strip subjected to Zn plating is used to a stainless steel strip, and pressing force is applied with a bending roll 3a to execute plastic bending. Successively, the Zn plated stainless steel strip subjected to the bending work, is curled to the width-wise direction while restricting deformation to the longitudinal direction and formed to pipe-state with shape holding rolls 4 and side rolls. Then, micro-plasma welding is executed to both end parts in the width-wise direction to manufacture the stainless steel pipe. By this method, the welded steel pipe having excellent surface characteristic and corrosion resistance can be obtd.

37. 发明专利

JPH0394992A CONTINUOUS WELDING TUBE MAKING METHOD 失效
公开(公告)号：JPH0394992A
公开(公告)日：1991-04-19
申请号：JP23410989
申请日：1989-09-08
申请人： NISSHIN STEEL CO LTD
发明人： INOUE SHOJI , FUKUMURA KATSUHIKO , TAKEZOE AKINOBU
IPC分类号： B23K31/00 , B23K9/025
摘要： PURPOSE:To attain the complete elimination of a plating metal by spraying an injection flow of a liquid containing abrasive grains to the surface of each edge part before executing cylindrical forming of a plating steel plate. CONSTITUTION:A band-like plating steel plate S is transferred continuously, and the plating steel plate S is formed to a cylindrical shape. By bringing an edge part of the formed plating steel plate to butt welding, continuous welding tube making is executed. In this state, before forming the plating steel plate S to a cylindrical shape, a nozzle 11 is directed to the surface of each edge part of its right and left. Subsequently, an injection flow of a liquid containing abrasive grains is sprayed to the edge part of the plating steel plate S from the nozzle 11. Next, a metal elimination processing for grinding and eliminating the plating metal on the surface of the edge part is executed. In such a way, a sound tube quality can be guaranteed.

38. 发明专利

JPH02160169A METHOD OF WELDING JOINT PART OF DIFFERENT DIAMETR TUBES 失效
公开(公告)号：JPH02160169A
公开(公告)日：1990-06-20
申请号：JP31598888
申请日：1988-12-14
申请人： NISSHIN STEEL CO LTD
发明人： FUKUMURA KATSUHIKO , INOUE SHOJI , OZAWA HIRONORI , SHIMADA YOSHIAKI
IPC分类号： B23K33/00 , B23K9/028 , B23K37/00
摘要： PURPOSE:To efficiently weld the joint part by fitting the end face of an open end of a thin metallic ring and the end edge of a metallic pipe previously formed with a circumferential groove in such a manner as to coincide approxi mately with the end edge of the circumferential groove and welding the fitted parts. CONSTITUTION:The circumferential groove 11 is previously formed on the outside peripheral surface of the metallic pipe 10 to be fitted with a thin metallic ring 30 and the open end 31 of the ring 30 is fitted onto the pipe 10. The aiming position of a welding arc is pointed to the circumferential edge of the side wall of the groove 11 from the groove 11 side and the fitted parts are welded. Namely, the fitted parts are welded over the entire part in the circumferential while the pipe 10 is rotated around the pipe axis together with the metallic ring 30. A weld metal 12 is build up in the groove 11 by which the welding and joining of the open end 31 of the metal ring 30 to the pipe 10 are executed. Welding of the overlapped part of the open end 32 on the other end side of the ring 30 and the end face of the metallic pipe 20 may be executed under the same conditions as for ordinary welding.

39. 发明专利

JPH11254032A METAL TUBE HAVING A PLURALITY OF FLOW PASSAGES AND ITS MANUFACTURE 失效
公开(公告)号：JPH11254032A
公开(公告)日：1999-09-21
申请号：JP5690398
申请日：1998-03-09
申请人： NISSHIN STEEL CO LTD
发明人： NAKAHARA NORIYUKI , NAKAKO TAKEFUMI , INOUE SHOJI
IPC分类号： B21C37/15 , B21D17/02 , B21D17/04 , F28F1/00
摘要： PROBLEM TO BE SOLVED: To obtain a metal tube whose inside is partitioned with partition walls extending in the axial direction of a tube. SOLUTION: In this metal tube, the inside of the tube is partitioned into plural flow passages D1 , D2 with partition walls t2 , t3 extending in the axial direction of the tube. The partition walls t2 , t3 are formed by closing an extending part t1 and welding t5 it. When the extending part t1 is welded with a facing internal surface, the flow passages D1 , D2 are formed into mutually closed flow passages. The flow passages D1 , D2 are also formed by extending the wall t0 of the tube from the opposite direction, forming plural extending parts t1 toward the center of the tube and mutually welding the tip of the extending part t1 .

40. 发明专利

JPH1190529A MANUFACTURE OF METALLIC PIPE WITH INTERNAL PARTITION WALL AND DEVICE THEREFOR 失效
公开(公告)号：JPH1190529A
公开(公告)日：1999-04-06
申请号：JP26022697
申请日：1997-09-25
申请人： NISSHIN STEEL CO LTD
发明人： NAKAKO TAKEFUMI , INOUE SHOJI
IPC分类号： B21C37/15 , B21D5/12
摘要： PROBLEM TO BE SOLVED: To manufacture a metallic pipe with internal partition walls with high productivity by forming in a cylindrical shape through roll-less forming and subsequently welding a metallic band for pipe welded into a T-shape out of a metallic band for partition walls. SOLUTION: When pipe forming is executed by giving to a metallic band 10 for pipe a residual stress which tends to bend in the width direction through bending/ unbending by small diametered bending rolls 15, a metallic band 20 for partition walls is sent into the interior of the metallic band for pipe formed in a circular arc shape, and the lowest end bending part of the metallic band 20 for partition wall is welded to the metallic band 10 for pipe, and after that the metallic band 10 for pipe is formed into a cylindrical shape, and both the ends in the width direction of the metallic band for pipe are welded to the upper end bending part of the metallic band 20 for partition walls into an one body. A bending device 13 with built-in bending rolls 15 is arranged at the lower part of a pass line so as not to interfere with a group of rolls 22 forming both the ends in the width direction of the metallic band 20 for partition walls. Thereby, with a symplified structural constitution, the welded pipes partitioned in the interior with partition walls are continuously manufactured.

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