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41. 发明专利

JPH05164475A AUTOMATIC POSITIONING CUTTER FOR MELTING METAL SAMPLING CHAMBER 失效
公开(公告)号：JPH05164475A
公开(公告)日：1993-06-29
申请号：JP35251091
申请日：1991-12-13
申请人： NIPPON STEEL CORP , OKUMURA MACH CORP
发明人： KUMAKURA MASANORI , IDE KAZUO , MATSUO SHINJI , KIMURA YOSHIHARU , TAKAI MASAO
IPC分类号： F27D21/00 , G01N1/10
摘要： PURPOSE:To cut a probe having a sampling chamber of molten metal samples extracted from a melting furnace at the lower end at a specified position and take out the sampling chamber. CONSTITUTION:A probe P is suspended with an alignment clamp 1 and its sampling chamber portion is placed at its cutting position. At that cutting position, the sampling chamber portion is clamped with a clamp 2. The upper end portion of the sampling chamber portion is cut with a cutter of a cutting device which is arranged to move forward.

42. 发明专利

JPH0559418A METHOD FOR PRE-TREATING MOLTEN IRON AND THIS LANCE 失效
公开(公告)号：JPH0559418A
公开(公告)日：1993-03-09
申请号：JP22003891
申请日：1991-08-30
申请人： NIPPON STEEL CORP
发明人： KUROKI SUMIICHI , KUMAKURA MASANORI , KASHIWABARA TSUKASA , MATSUO SHINJI
IPC分类号： C21C1/02 , C21C7/072 , F27D3/18
摘要： PURPOSE:To drastically improve the reaction efficiency by preventing damping caused by mutual interference between ascending and descending flows in molten iron developing by blowing treating agent or the treating agent and gaseous oxygen from the adjoining nozzles while circulating. CONSTITUTION:At the time of executing the pre-treatment to molten iron 5 by arranging a nozzle 12 at the lower part of a lance 4 immersed into the molten iron 5 in a reaction vessel and blowing the gaseous oxygen and the treating agent through this nozzle 12, the plural nozzles 12 are set in peripheral direction at the lower part of the lance 4. The treating agent or the treating agent and the gaseous oxygen passed through the adjoining nozzles are blown into the molten iron 5 while circulating in the mutually reverse direction.

43. 发明专利

JPH03180415A FREE BOARD FOR REFINING TREATMENT OF MOLTEN IRON 失效
公开(公告)号：JPH03180415A
公开(公告)日：1991-08-06
申请号：JP31760689
申请日：1989-12-08
申请人： NIPPON STEEL CORP
发明人： SAWADA IKUO , MATSUO SHINJI , KOMORI TOSHIYA
IPC分类号： C21C1/00
摘要： PURPOSE:To prevent lowering of iron yield caused by splashing and to improve uniformized mixing property by arranging the prescribed projecting part on inside wall of a free board and making suppression of shaking possible developed at the time of blowing refining gas, etc. CONSTITUTION:The lower part of free board F is submerged into molten iron in a molten iron ladle Y and a lance is descended from upper part in the free board F to blow refining gas and refining agent into the molten iron. At this time, the pre-scribed shaped projecting part T is arranged within the range bellow the height where the shaking exerts in the submerged zone in inner wall of the free board F. Then, the regulation is applied as follows, in the case of n=1 (n: number of projecting parts), b/a=0.2-2 (wherein, a: width of the projecting part, b: thickness of the projecting part), a/D=0.02-pi/2 (wherein, D: inner diameter of the free board), b/D=0.02-0.3, and in the case of n>=2, b/a>=0.2, a n/D=0.02-pi/2, b/D=0.02-0.3.

44. 发明专利

JP2002001401A METHOD FOR DETERMINING STANDBY POSITION OF SPLICING MACHINE 失效
公开(公告)号：JP2002001401A
公开(公告)日：2002-01-08
申请号：JP2000181012
申请日：2000-06-16
申请人： NIPPON STEEL CORP
发明人： MATSUO SHINJI , NITTA HIROYUKI , KATO DAIKI
IPC分类号： B21B1/26 , B21B15/00
摘要： PROBLEM TO BE SOLVED: To restrain an endless rolling from discontinuing or a rolling speed from lowering for the catch-up by splicing a top end of the following steel plate to a back end of the preceding steel plate with splicing machine without simply discontinuing the endless rolling nor adjusting the jointing speed for the catch-up. SOLUTION: In a method wherein an interval where the top end of the following steel plate catches up with the back end of the preceding steel plate is provided and an interval where, the back end and the top end of both steel plates are splicing, are provided and making the splicing machine which travels the splicing interval wait in the splicing interval, the splicing machine begins to run when the back end of the preceding steel plate and the top end of the following steel plate enter the splicing machine, and then the splicing begins at the time of the back end and the top end of both steel plates make contact with each other, the standby position of the splicing machine is determined so that the relationship among a standby position X, a distance LA required for the top end of the following steel plate catching up with the back end of the preceding steel plate at the time of going into the splicing machine, a distance for catching up interval LB, a distance for splicing interval LC and a distance LD required for splicing satisfies LA-LB

45. 发明专利

JP2001047107A METHOD FOR WELDING STEEL SHEET 失效
公开(公告)号：JP2001047107A
公开(公告)日：2001-02-20
申请号：JP22744399
申请日：1999-08-11
申请人： NIPPON STEEL CORP
发明人： MATSUO SHINJI , MAEDA KATSUHIRO , ASO YOSUKE
IPC分类号： B23K9/23 , B21B15/00 , B23K9/025 , B23K26/21 , B23K26/00
摘要： PROBLEM TO BE SOLVED: To prevent melt down of molten metal from an edge part at the time of joining the width edge parts of rough bars by welding by making welding speed in an early stage after starting welding by laser or arc faster than the welding speed at the steady time. SOLUTION: By butting together steel sheets, for example, plural slabs (rough bars) 1 after hot rough rolling, the hot rough bars are joined to continuously execute continuous hot rolling for finishing in a field of hot rolling. At this time, in the early stage after starting welding, the welding speed in the early stage is made faster than the welding speed at the steady time so that the molten part of the steel sheet with the laser 5 or the arc is not reached a bottom surface and does not penetrate the steel sheet. It is necessary to secure distance L where the joining speed is made faster from a starting position of welding as 5-50 mm and, when the distance L is a proper value, because penetrating force of the laser does not become excessive in the early stage of welding and the rough bar 1 is not penetrated, flow down of the molten metal is prevented, the molten metal is successively solidified, role of joining metal is sufficiently played and a joining part 6 is strengthened.

46. 发明专利

JPH10263609A METHOD FOR JOINING STEEL FOR CONTINUOUS HOT ROLLING 失效
公开(公告)号：JPH10263609A
公开(公告)日：1998-10-06
申请号：JP6961697
申请日：1997-03-24
申请人： NIPPON STEEL CORP
发明人： MATSUO SHINJI , MAEDA KATSUHIRO , NAKAMURA TAKAAKI , ASO YOSUKE
IPC分类号： B21B15/00 , B21B1/26 , B23K26/21 , B23K26/00
摘要： PROBLEM TO BE SOLVED: To provide a joining method of steel by which joining time is shortened while maintaining the continuity of joining and preventing the generation of defective joining in the case that laser beam welding is used as joining means in the flying joining of a preceding steel and succeeding steel for a continuous hot rolling. SOLUTION: Welding speed is periodically changed in the width direction so that the speed ratio of a high-speed region to a constant-speed region is 2-7 and the depth of joining is periodically changed in the width direction. In such a case, it is effective to periodically change the welding speed in the width direction so that the relation of (b)

47. 发明专利

JPH10137806A MANUFACTURE OF HOT ROLLED STEEL SHEET AND DEVICE THEREFOR 失效
公开(公告)号：JPH10137806A
公开(公告)日：1998-05-26
申请号：JP30748496
申请日：1996-11-05
申请人： NIPPON STEEL CORP
发明人： NAKAMURA TAKAAKI , ARISUMI SEIJI , KATO DAIKI , ASO YOSUKE , MATSUO SHINJI
IPC分类号： B21B13/14 , B21B1/26 , B21B15/00 , B23K20/04
摘要： PROBLEM TO BE SOLVED: To manufacture a hot rolled steel sheet by hot rolling continuing process high in productivity by joining the rear end part and tip part of rough bars and rolling it so that breaking is not generated, at the time of rolling. SOLUTION: In this manufacturing method of the hot rolled steel sheet, after cutting the rear end part of the preceding material 1 and the tip part of the succeeding material 2 of the rough bars, both ends are butted and welding is executed from the upper surface toward the back surface and rolled. In such a case, rolling is executed imparting difference to the respective diameters of the upper and lower rolling rolls 5, 6 or imparting the shaft-center difference in the vertical direction to the upper and lower rolls 5, 6 so that the upper surface of the succeeding material is brough into contact with the upper rolling roll 5 on the inlet side of the rolling mill with which the initial rolling is executed.

48. 发明专利

JPH10128406A MANUFACTURE OF CONTINUOUS HOT ROLLED STEEL PLATE 失效
公开(公告)号：JPH10128406A
公开(公告)日：1998-05-19
申请号：JP30080396
申请日：1996-10-28
申请人： NIPPON STEEL CORP
发明人： NAKAMURA TAKAAKI , ASO YOSUKE , MATSUO SHINJI
IPC分类号： B21B15/00 , B21B1/26 , B23K20/04
摘要： PROBLEM TO BE SOLVED: To enable continuous hot rolling of different thickness of crude bars having high productivity by welding after setting the height of the contacting endmost part so that a succeeding stock becomes a specified quantity higher in the welding side than a preceding stock. SOLUTION: When the bar thickness T2 of the succeeding stock is thicker than the bar thickness T1 of the preceding stock in the shape of cut part (T2 >T1 ), the front end surface of the succeeding stock 2 is butted to the rear end surface of the preceding stock 1, the endmost part wherein both come into contact is set a difference (h) in level high in the welding side (upper side) so as to satisfy the condition that the succeeding stock is at least >=1mm, preferably (h)>=T2 -T1 >=1mm higher the preceding stock, and welding is executed. Whereby, the upper side front end part of the succeeding stock in the welding side is brought into contact with a rolling roll at first. And the crude bar joining in this order is composed. By this way, the part being non-contact part is also pressed to stick by rolling, and the breakdown in the joined part is eliminated.

49. 发明专利

JPH09174108A CONTINUOUS HOT ROLLING METHOD OF HOT STEEL 失效
公开(公告)号：JPH09174108A
公开(公告)日：1997-07-08
申请号：JP35116495
申请日：1995-12-27
申请人： NIPPON STEEL CORP
发明人： TOKIDA HIROSHI , NAKAMURA TAKAAKI , MATSUO SHINJI , MAEDA KATSUHIRO
IPC分类号： B21B15/00 , B21B1/26 , B21J1/02 , B23K31/00 , C21D7/00
摘要： PROBLEM TO BE SOLVED: To provide a method for stably manufacturing a hot rolled steel sheet without breaking the sheet during joining, finish rolling and coiling in the method by which finish rolling is continuously executed after joining the rear end part of a preceding material of the hot steel sheet with the top end part of the succeeding material. SOLUTION: In this continuous hot rolling method of the hot steel, the rear end part of the preceding material is butted against the top end part of the succeeding material, joining is executed while adding strain of >=0.5% in the joined part and its peripheral part just before joining or during joining and, after that, the hot rolling is executed. Further, in the continuous hot rolling method of the hot steel, as necessary, finish rolling is executed after adding strain of >=0.2% after joining.

50. 发明专利

JPH06287032A RECEIVING APPARATUS FOR MOLTEN STEEL-MAKING SLAG AND TREATING METHOD 失效
公开(公告)号：JPH06287032A
公开(公告)日：1994-10-11
申请号：JP7413793
申请日：1993-03-31
申请人： NIPPON STEEL CORP
发明人： HORII KAZUHIRO , OBANA YASUO , TABUCHI SATOSHI , MATSUO SHINJI , KASHIWABARA TSUKASA , KUDO TOSHIAKI , IMI TETSUO , HORI SUMIHIRO
IPC分类号： C04B5/00 , C21B3/06
摘要： PURPOSE:To provide an apparatus for receiving molten steel-making slag and a stag-treating method effective for remarkably reducing the load on the work for separating the solidified slag from molten iron. CONSTITUTION:The objective apparatus for receiving a partially solidified molten steel-making slag containing iron metal is provided with a sieving means 10 to essentially inhibit the passage of solidified material and to allow the passage of the molten material and a receiving means 20 to receive the molten material passed through the sieving means 10 and solidify the molten part at a rate to enable the separation of the iron metal from the slag by the specific gravity difference.

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