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61. 发明专利

JPS63317271A CORED WIRE FOR WELDING 失效
公开(公告)号：JPS63317271A
公开(公告)日：1988-12-26
申请号：JP15324387
申请日：1987-06-22
申请人： KAWASAKI STEEL CO
发明人： SAKASHITA MIKIO , NAKANO SHOZABURO
IPC分类号： B23K35/02 , B23K35/40
摘要： PURPOSE:To improve moisture absorption resistance and arc stabiliity by using the metal strip whose short side on the cross section in the plate width direction is parallel each other and the angle made by the long side is specified as a sheath metal. CONSTITUTION:The metal strip becoming of a sheath metal and whose short side on the cross section in the plate width direction is parallel each other and whose angle alpha made with the long side is at 30-80 deg. is formed. After seaming it to the specified diameter with filling a flux by a forming roller by using that metal strip a cored wire is prepd. via a wire drawing stage. At the wire drawing stage, the force of Pcostheta of the rolling reduction force P is exerted vertically for the seaming face and a seaming part B becomes to be strongly joined extremely. As a result, even after completion of an expansion stage, the seaming part B is difficult to be opened by a springback force and the cored wire excellent in moisture absorption resistance is obtd.

62. 发明专利

JPS62254994A NON-SHIELDED ARC WELDING METHOD 失效
公开(公告)号：JPS62254994A
公开(公告)日：1987-11-06
申请号：JP9826786
申请日：1986-04-30
申请人： KAWASAKI STEEL CO
发明人： SAKASHITA MIKIO , NAKANO SHOZABURO , NISHIYAMA NOBORU
IPC分类号： B23K35/368
摘要： PURPOSE:To prevent the generation of weld defects by incorporating respectively specific weight % of Fe-Si, fluorite, etc., into a flux and controlling the content of diffusible hydrogen and content of total nitrogen in a weld metal according to the prescribed equation. CONSTITUTION:A cored wire is formed by filling a low melting point flux component consisting of 1-15% Fe-Si, 5-30% Fe-Mn and the balance iron powder into an inside housing chamber and a high melting point component flux contg. 15-50% fluorite, 5-40% CaCO3, 5-25% wollastonite, and 5-20% rutile, magnesia, and sodium silicofluoride, respectively into an outside housing chamber. Welding is executed by controlling the content of the diffusible hydrogen and content of the total nitrogen in the weld metal in such a manner as to satisfy equation I. The content of the N in the weld metal is decreased by controlling the component compsn. of the wire and the generation of blowholes in the weld metal is prevented by the adequate relation between the content of the diffusible hydrogen and the content of the total nitrogen.

63. 发明专利

JPS62158595A WELDING WIRE HAVING EXCELLENT WELDING WORKABILITY 失效
公开(公告)号：JPS62158595A
公开(公告)日：1987-07-14
申请号：JP5386
申请日：1986-01-06
申请人： KAWASAKI STEEL CO
发明人： MATSUMOTO TAKEO , NAKANO SHOZABURO , NISHIYAMA NOBORU
IPC分类号： B23K35/02 , B23K35/30 , B23K35/40
摘要： PURPOSE:To obtain a welding wire having good feeding property and welding workability by specifying the contents of C and Ti in wire components and specifying the ratio between the grain boundary oxide layer and crystal grains generated on the surface layer of the wire during intermediate annealing. CONSTITUTION:The ratio A between the grain boundary oxide layer and crystal grains formed on the surface of the welding wire contg. 0.02-0.06wt% C and 0.03-0.30wt% Ti is specified to 0.4

64. 发明专利

JPH07155972A METHOD FOR LASER BEAM BUTT WELDING OF TUBE AND LASER BEAM BUTT WELDING MACHINE OF OUTER SURFACE OF TUBE 失效
公开(公告)号：JPH07155972A
公开(公告)日：1995-06-20
申请号：JP30408793
申请日：1993-12-03
申请人： KAWASAKI STEEL CO
发明人： NAKANO SHOZABURO , SUEDA AKIRA , AKAHIDE KOZO
IPC分类号： B23K37/00 , B23K26/064 , B23K26/082 , B23K26/21 , B23K37/02 , B23K26/00 , B23K26/06 , B23K26/08
摘要： PURPOSE:To realize the welding at a high speed and with low heat input by continuously executing the butt welding of tubes by making use of the laser beam welding along the butt part while the position of the tubes is fixed. CONSTITUTION:In the end surface butt welding of tubes, a tube 2b to be welded is supported by a plurality of frames 21, 22 in executing the laser beam welding of the outer circumferential surface of the tube at the butt part 2c, and these frames are constituted to be expandable in the vertical direction. On the other hand, a laser beam welding nozzle 1 0 which is extended in the direction of the generating line of the outer circumferential surface of this tube 2b to be welded is provided on the tip of the tube. In the constitution of a welding arm 9 revolving around the circumferential surface, a bend part capable of detouring this arm at the position opposite to either of the frames is provided. Welding is executed by the interaction of the bend part provided in the middle of the welding arm and the expandable frames according to the welding position of the outer circumferential surface of the tube 2b to be welded while the laser beam welding nozzle 10 is continuously revolved along the outer circumferential surface of the tube 2b to be welded.

65. 发明专利

JPH07124769A METHOD AND EQUIPMENT FOR BUTT LASER WELDING OF TUBE 失效
公开(公告)号：JPH07124769A
公开(公告)日：1995-05-16
申请号：JP27215293
申请日：1993-10-29
申请人： KAWASAKI STEEL CO
发明人： SUEDA AKIRA , NAKANO SHOZABURO , AKAHIDE KOZO
IPC分类号： B23K37/02 , B23K26/064 , B23K26/067 , B23K26/082 , B23K26/21 , B23K26/00 , B23K26/06 , B23K26/08
摘要： PURPOSE:To automatically execute the butt welding of a tube along the butted part with fixing the attitude of tube by butting end faces of tubes and simultane ously laser welding the butted part from both the inside and outside of the tube. CONSTITUTION:A reflection mirror 12 is arranged at the joint part of a duct 4, laser beam is transmitted as parallel beam in a main arm 1. Next, the laser beam is distributed to an inside sub-arm 7 and outside sub-arm 10 by a half mirror 13 arranged at a branching part 9. One of the laser beam is transmitted into the inside sub-arm by a reflection mirror 14 arranged at the joint part between a main arm 1 and inside sub-arm 7. Further, it is transmitted to a collective mirror 16 by a reflection mirror 15, a butted part 2c of tube inside face is irradiated with the collected laser beam from a nozzle 8. Other laser beam is transmitted into the inside sub-arm 7 by a reflecting mirror 17 and is led a collective mirror, the butted part 2c of tube outside is irradiated with the collected laser beam from a nozzle 11. Deep penetration welding becomes possible with the tube fixed.

66. 发明专利

JPH05209223A PRODUCTION OF REINFORCING BAR HAVING LOW YIELD RATIO AND HIGH YIELD ELONGATION 失效
公开(公告)号：JPH05209223A
公开(公告)日：1993-08-20
申请号：JP7721191
申请日：1991-03-18
申请人： KAWASAKI STEEL CO
发明人： KAWASAKI MITSUSANE , HOSHINO TOSHIYUKI , AMANO KENICHI , NAKANO SHOZABURO
IPC分类号： C21D8/08 , C22C38/00 , C22C38/46 , C22C38/58
摘要： PURPOSE:To produce a reinforcing bar having high strength, low yield ratio, and high yield elongation by subjecting a steel stock having a specific composition consisting of C, Si, Mn, V, Al, N, Cr, Ni, Mo, Cu, and Fe to respectively specified rolling and cooling. CONSTITUTION:A stock of a steel having a composition consisting of, by weight, 0.10-0.60% C, 0.01-1.50% Si, 0.50-2.00% Mn, 0.20-0.60% V, 0.01-0.10% Al, =10% per pass. Then, the rolled stock is cooled, if necessary, down to >=400 deg.C at >5.0 deg.C/sec cooling rate, cooled down to ordinary temp. at 0.01-5.0 deg.C/sec cooling rate, and further subjected, preferably, to tempering at 400-700 deg.C.

67. 发明专利

JPH04318146A MACHINE STRUCTURAL STEEL EXCELLENT IN HARDENING PROPERTY 失效
公开(公告)号：JPH04318146A
公开(公告)日：1992-11-09
申请号：JP10826291
申请日：1991-04-15
申请人： KAWASAKI STEEL CO
发明人： KAWASAKI MITSUSANE , HOSHINO TOSHIYUKI , AMANO KENICHI , NAKANO SHOZABURO
IPC分类号： C22C38/00 , C22C38/18
摘要： PURPOSE:To obtain a steel excellent in shear cutting property, cold working property and induction hardening property. CONSTITUTION:This steel material has excellent in shear cutting property, cold working property and high torsional strength after induction hardening since it contains a proper range of C and a combination of low Si and proper amts. of Cr and Mo. Namely, this steel is a machine structural steel excellent in hardening property and contains 0.45-0.60wt.% C, 0.15 and

68. 发明专利

JPH04218641A STEEL FOR HIGH STRENGTH SHAFT PARTS 失效
公开(公告)号：JPH04218641A
公开(公告)日：1992-08-10
申请号：JP9070891
申请日：1991-04-22
申请人： KAWASAKI STEEL CO
发明人： HOSHINO TOSHIYUKI , KAWASAKI MITSUSANE , AMANO KENICHI , NAKANO SHOZABURO
IPC分类号： C22C38/00 , C22C38/14 , C22C38/38
摘要： PURPOSE:To obtain a steel for high strength shaft parts high in torsional strength and excellent in induction hardenability and cold workability by specifying a compsn. constituted of C, Si, Mn, P, S, Ti, B, N, O and Fe. CONSTITUTION:A steel for high strength shaft parts contg., by weight, 0.35 to 0.60%, 0.65 to 1.80% Mn, -145.6C -27.6C+0.01Si+4.10 Mn>=10.0 and IT=78.7C+17.7Si+24.9Mn+4.19

69. 发明专利

JPH04173921A PRODUCTION OF STEEL WIRE ROD OR BAR STEEL HAVING SPHEROIDIZED STRUCTURE 失效
公开(公告)号：JPH04173921A
公开(公告)日：1992-06-22
申请号：JP29553090
申请日：1990-11-02
申请人： KAWASAKI STEEL CO
发明人： HOSHINO TOSHIYUKI , AMANO KENICHI , NAKANO SHOZABURO
IPC分类号： C21D8/06
摘要： PURPOSE:To produce a steel wire rod or bar steel having spheroidized structure in an as-hot-rolled state by specifying heating hysteresis and working conditions at the time of hot-rolling a stock of steel having specific C content. CONSTITUTION:A stock of steel containing >=0.20wt.% C is subjected to first stage heating consisting of holding at a temp. between the Ac1 point and the Acm or Ac3 point for 1min- =30% draft, followed by holding at 660-740 deg.C for >=30min. By this method, spheroidized structure can be formed in the as-rolled state and the necessity of heat treatment stage can be obviated.

70. 发明专利

JPH0475707A WORKING ROLL FOR COLD OR SKIN PASS ROLLING EXCELLENT IN MAINTAINABILITY OF ROUGHNESS 失效
公开(公告)号：JPH0475707A
公开(公告)日：1992-03-10
申请号：JP18713490
申请日：1990-07-17
申请人： KAWASAKI STEEL CO
发明人： KIMURA TATSUKI , ISHII MASATAKE , NAKANO SHOZABURO
IPC分类号： B21B27/00 , B23K26/00
摘要： PURPOSE:To increase the life of roll by specifying the height of the recessed and projection part on the surface of roll for cold rolling where is roughened by radiating a laser beam and occupancy area ratio to projecting part. CONSTITUTION:A working roll for cold rolling on which roughening work is applied by radiating the high-energy density laser beam on the surface is constituted so that the occupancy area ratio of these projecting parts at the height of >= 5 mum from the flat surface of roll where isn't irradiated with the laser beam is 7 - 30% in the recessed and projection part of which its surface roughness is constituted. In this way, the elongation of the life of roll for cold rolling excellent in the maintainability of roughness and productivity can be improved.

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