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31. 发明专利

JPH08332501A MANUFACTURE OF HIGH DEPTH/HIGH HARDNESS RAIL 失效
公开(公告)号：JPH08332501A
公开(公告)日：1996-12-17
申请号：JP14043695
申请日：1995-06-07
申请人： NIPPON STEEL CORP
发明人： KUROKI TOSHIYA , UCHINO KOICHI , HIRAGAMI DAISUKE
IPC分类号： B21B1/085 , B21B1/08 , C21D8/00 , C21D9/04
摘要： PURPOSE: To manufacture a high-strength rail having higher hardness to the deep part of the rail head and excellent surface damage resistant property by starting rapid cooling after the finish rolling of a bloom for rails executed at prescribed drafts in two stages of the first half and second half. CONSTITUTION: First, in the finish rolling 1 of the first half, it is necessary to micronize structure to the deep part by applying pressurization as larger as possible and the bloom for rails is rolled at the draft of >=15% per pass. Next, in the finish rolling 3 in the second half, rolling of one pass or plural passes is executed at 950 deg.C where fine recrystallized grains are obtained at light draft of =6 deg.C/sec for 0.1-30sec interval and, further, when acceleration cooling is executed at the cooling rate of >=3 deg.C/sec, some degree of inside hardness is secured. Then, the high-strength rail having higher surface hardness and excellent in surface damage resistant property even when wear is progressed.

32. 发明专利

JPH08246100A PEARLITIC RAIL EXCELLENT IN WEAR RESISTANCE AND ITS PRODUCTION 失效
公开(公告)号：JPH08246100A
公开(公告)日：1996-09-24
申请号：JP4675395
申请日：1995-03-07
申请人： NIPPON STEEL CORP
发明人： UEDA MASAHARU , KAGEYAMA HIDEAKI , UCHINO KOICHI , BABAZONO KOUJI , KUTARAGI KEN
IPC分类号： C21D9/04 , C22C38/00 , C22C38/04 , C22C38/32
摘要： PURPOSE: To improve the wear resistance required for the curve territory rail of a heavy axis heavy railway. CONSTITUTION: This pearlitic rail excellent in wear resistance is the one in which the head of a steel rail reserving heat of high temp. having a compsn. contg. >0.85 to 1.20% C, 0.10 to 1.00% Si and 0.40 to 1.50% Mn and furthermore contg., at need, one or >= two kinds among Cr, Mo, V, Nb, Co and B and subjected to hot rolling or the head of a steel rail heated to a high temp. for the purpose of heat treatment is subjected to accelerated cooling from an austenitic temp. region to 700 to 500 deg.C, i.e., the cooling stopping temp. at 1 to 10 deg.C/sec, the head corner part of the steel rail and the range to a depth of 20mm as the surface of the head part as a starting point is made to show a pearlitic structure, and the hardness of the pearlitic structure in the same range is regulated to >=320Hv, and a method for producing the same is provided. In this rail steel, the content of carbon is increased, compared to that of the conventional rail steel, and simultaneously, its hardness is improved, by which its wear resistance can be improved, compared to that of the conventional rail.

33. 发明专利

JPH0847797A WELDING/TREATMENT DEVICE OF RAIL 失效
公开(公告)号：JPH0847797A
公开(公告)日：1996-02-20
申请号：JP18346494
申请日：1994-08-04
申请人： NIPPON STEEL CORP , HIGASHI NIPPON RYOKAKU TETSUDO , MISHIMA KOSAN CO LTD
发明人： UCHINO KOICHI , SUGINO KAZUO , OKUMURA MAKOTO , KONO KAZUHISA , SHIDARA HIDEKI , MUTA SHINJI
IPC分类号： B23K37/053 , B23K9/038 , B23K9/12 , B23K37/08 , B23K101/26
摘要： PURPOSE:To reduce a working time of rail welding by integrating a device to give tension to rail, a device to execute alignment and upward cambering, a torsion correcting device, a welding device and a removing device of reinforcement of weld on a base. CONSTITUTION:A base 1 is set parallel to rails R1, R2, the level of rails is appropriately set by adjusting an adjuster 10. The rails R1, R2 are approached each other by tensioners 4, 5, initial tension is given to the rails R1, R2. By operating an alignment device 6, the rails R1, R2 are aligned. Inclination of rails R1, R2 is corrected by operating a torsion correcting device 7. The Joining end side of rails R1, R2 is set upward a little bit to reduce the residual stress after welding. Joining part is welded by a welding equipment 9. Excessive reinforcement of weld is removed by an excessive reinforcement of weld removing device 8. By releasing the rails R1, R2 from restraint and dismantling the base 1, the work is completed.

34. 发明专利

JPH07185881A COATED ELECTRODE FOR CR-MO-BASED RAIL 失效
公开(公告)号：JPH07185881A
公开(公告)日：1995-07-25
申请号：JP33372493
申请日：1993-12-27
申请人： NIPPON STEEL CORP
发明人： OKUMURA MAKOTO , KARIMINE KENICHI , NISHIMURA HITOSHI , UCHINO KOICHI
IPC分类号： B23K35/30 , B23K9/038 , B23K35/365
摘要： PURPOSE:To provide a coated electrode with which joint performance excellent in terms of wear resistance and surface flaw resistance is assured and which has good welding workability at the time of subjecting a Cr-Mo-based rail steel to enclosed arc butt welding and repair build-up welding at an on-site track. CONSTITUTION:A coating material contains, by weight % of the total weight of the coating material, 25 to 45% carbonate, 15 to 30% metal fluoride, 3 to 9% rutile and the balance a coating material and arc stabilizer. A welding electrode is coated with this coating material at 20 to 30% of the total weight of the welding electrode. The coated electrode which contains, by weight % of the respective components occupied in the total metal of the welding electrode, 0.1 to 0.39% C, 0.35 to 0.9% Si, 0.75 to 2.0% Mn, 0.9 to 2.5% Cr, 0.1 to 0.6% Mo or contains at least one : kinds of 0.02 to 0.15% V, 0.02 to 0.1% Nb, 0.2 to 0.5% Cu and 0.5 to 3% Ni in addition to the above and consists of the balance Fe with inevitable impurities is obtd.

35. 发明专利

JPH07126741A PRODUCTION OF HIGH DUCTILITY AND HIGH TOUGHNESS RAIL 失效
公开(公告)号：JPH07126741A
公开(公告)日：1995-05-16
申请号：JP27716493
申请日：1993-11-05
申请人： NIPPON STEEL CORP
发明人： KAGEYAMA HIDEAKI , UCHINO KOICHI , WAKATSUKI TERUYUKI
IPC分类号： B21B1/085 , B21B1/08 , C21D7/13 , C21D8/00 , C21D9/04 , C22C38/00 , C22C38/04
摘要： PURPOSE:To produce a high ductility and high toughness rail having a fine pearlitic structure by refining austenite into fine grains through rolling-down at a low temp. CONSTITUTION:At the time of subjecting a steel rail having a compsn. contg. 0.55 to 0.85% C, 0.15 to 0.85% Si and 0.50 to 1.50% Mn and contg., at need, one or >=two kinds among V, Nb and Ti and heated to a high temp. to rolling, rolling-down is executed at 900 to 1050 C at 10 to 20% reduction of area to produce a rail excellent in ductility and toughness. Moreover, in addition to controlled rolling at the time of the rail rolling, accelerated cooling is executed from a temp. of >=700 deg.C after the rail forming rolling at 1 to 5 deg.C/sec cooling rate between 700 to 500 deg.C to produce a high strength, high ductility and high toughness rail. By executing the same low temp. rolling, elongation value prescribed in Chinese specs can be satisfied.

36. 发明专利

JPH05345956A 失效
公开(公告)号：JPH05345956A
公开(公告)日：1993-12-27
申请号：JP8251792
申请日：1992-04-03
申请人： NIPPON STEEL CORP
发明人： UEDA MASAHARU , UCHINO KOICHI , SUGINO KAZUO
IPC分类号： C21D8/00 , C21D9/04 , C22C38/00 , C22C38/12 , C22C38/48
摘要： PURPOSE:To secure the wear resistance on the surface of the head of a rail and to improve the fracture toughness of the rail. CONSTITUTION:The wear resistant and high toughness rail is formed by a double layer structure in such a manner that, in the section of a rail axis, the surface part (a) of the head of the rail and the surface part on the head side are coated with a material in which the metallic structure of a layer to the depth of 5 to 40mm from the surface of the outer shell of the rail assumes a pearlitic one excellent in wear resistance and the other parts are coated with a high VN-added material 2 having a ferritic-pearlitic structure. In this rail, wear resistance equal to that of the conventional rail is secured on the surface part of the rail head and on the surface part on the head side, and furthermore, the fracture toughness of the rail can remarkably be improved.

37. 发明专利

JPH02104471A BUTT WELDING METHOD FOR RAIL 失效
公开(公告)号：JPH02104471A
公开(公告)日：1990-04-17
申请号：JP25330788
申请日：1988-10-07
申请人： NIPPON STEEL CORP
发明人： UCHINO KOICHI , OKAZAKI MUTSUMI , SUGINO KAZUO
IPC分类号： B23K9/038
摘要： PURPOSE:To form a flat rail joint without causing defects on a welded zone by bending a groove part of rails on which butt welding is to be performed to a specific shape and bringing a backing jig with a specific shape having a recessed part at the center into close contact with the rail bottoms to perform welding. CONSTITUTION:When the rails 1a and 1b are set up against each other and subjected to butt welding, the grove part of the rails 1a and 1b is bent in advance by the direction and size in which deformation caused by welding heat or soldification and shrinkage of weld metal is corrected. Meanwhile, the backing jig 2 which has a protuberant cross-sectional shape having slopes in the directions contrary to each other and is provided with the recessed part for the purpose of forming a back bead and storing slag is prepared. This backing jig 2 is arranged to the bottoms of the rails 1a and 1b and the groove part thereof is subjected to build-up by welding. By this method, the rails 1a and 1b bent in advance are corrected by performing welding and the straight rail joint without defects on the welded zone is formed.

38. 发明专利

JPH01180780A BUTT WELDING METHOD FOR RAIL 失效
公开(公告)号：JPH01180780A
公开(公告)日：1989-07-18
申请号：JP33608387
申请日：1987-12-28
申请人： NIPPON STEEL CORP
发明人： UCHINO KOICHI , OKAZAKI MUTSUMI , SUGINO KAZUO
IPC分类号： B23K9/035 , B23K9/02 , B23K9/038
摘要： PURPOSE:To suppress crater cracking and to obtain a welded joint with high performance by starting a welding current value at a specific value and changing over it immediately to a specific value at the time of performing enclosed arc welding extending over the heads from the bellies of rails after multi-layer welding of the rail legs is completed. CONSTITUTION:In butt welding of the rails using a coated arc electrode containing 0.4-1.0% C, after the rail feet 1 are subjected to multi-layer welding, craters 3 of the multi-layer welding end of a rising part 2 are overlapped on lower layers 4 to form reinforcements of weld which are extended to the outside from rail cross sections. Further, with an enclosed arc weld zone 5 extending over the heads from the bellies of the rails, a welding current at the time of starting is made to 240-280A and immediately after corners of four rounds of a final layer of the feet are deposited sufficiently, the current value is lowered to 190-240A to perform continuous welding. By this method, the size of an electrode joint or the final crater can be reduced and the crater cracking can be suppressed.

39. 发明专利

JPS61130420A Manufacture of high toughness flange material 失效
标题翻译：高韧性法兰材料的制造
公开(公告)号：JPS61130420A
公开(公告)日：1986-06-18
申请号：JP25179584
申请日：1984-11-30
申请人： Nippon Steel Corp
发明人： UCHINO KOICHI , ONO TAKAHIDE
IPC分类号： C22C38/00 , C21D6/00 , C21D9/00 , C22C38/12 , C22C38/58
摘要： PURPOSE: To manufacture flange material superior in strength and toughness, by forging steel material contg. specified quantities of V, N to flange state, the quenching and tempering said material.
CONSTITUTION: Steel contg. by weight, 0.05W0.20% C, 0.01W0.60% Si, 1.10W1.60% Mn, 0.03W0.20% V,
摘要翻译：目的：制造强度和韧性优异的法兰材料，锻造钢材。指定数量的V，N到法兰状态，淬火回火所述材料。构成：钢铁，0.05-0.20％C，0.01-0.60％Si，1.10-1.60％Mn，0.03-0.20％V，<0.003％P，<0.01％S，0.001-0.06％Al，0.009-0.02％N或 0.05-0.30％Cu，0.05-0.5％Mo，0.05-0.5％Ni，0.05-0.3％Cr，0.005-0.05％Nb中的一种或> = 2种锻造成法兰形状，然后将钢淬火回火治疗。在钢中使用VN的析出晶粒细化效果，淬火期间奥氏体晶粒细化。由此，淬火回火后的结构均匀，可以制造强度和韧性优异的凸缘材料。

40. 发明专利

JP2008149379A Cast slab with excellent solidification structure 有权
标题翻译：具有优异的固结结构的铸造板
公开(公告)号：JP2008149379A
公开(公告)日：2008-07-03
申请号：JP2008063010
申请日：2008-03-12
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： SEZE AKIFUMI , MOROHOSHI TAKASHI , UCHINO KOICHI
IPC分类号： B22D11/115 , B22D11/04 , B22D11/16
摘要： PROBLEM TO BE SOLVED: To provide a cast slab with excellent solidification structure in which an equiaxed crystal ratio in the solidified cast slab is enhanced by applying a stirring flow in molten steel by means of electromagnetic stirring to prevent occurrence of internal defects such as center segregation and center porosity and also generation of a negative segregation band in the inside of the cast slab, and improve hardness and wear resistance etc. of steel products, and to provide steel material made by processing the cast slab.
SOLUTION: In continuous casting of the molten steel 12 containing not less than 0.15 mass% carbon for use as railroads or thick steel plates which is poured into a mold 11, electromagnetic stirring apparatus 16a and 16b are used to apply a stirring thrust to the molten steel with variations, so that a negative segregation band 20, which is formed when the molten steel 12 solidifies, is divided into a stripe shape with a thickness of 2.6-8.1 mm.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供一种具有优异的凝固组织的铸坯，其中通过电磁搅拌在钢水中施加搅拌流动来提高固化的铸坯中的等轴晶比，以防止内部缺陷的发生作为中心偏析和中心孔隙度，并在铸坯内部产生负偏析带，提高钢产品的硬度和耐磨性等，并提供通过加工铸造板材制成的钢材。解决方案：在连续铸造含有不少于0.15质量％碳的钢水12中，用作浇注到模具11中的铁路或厚钢板，电磁搅拌装置16a和16b用于施加搅拌推力与钢水变化，使得当钢水12固化时形成的负偏析带20被分割成厚度为2.6-8.1mm的条状。版权所有（C）2008，JPO＆INPIT

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