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1. 发明专利

JP2004154851A Rolling method for planetary inclined roll 有权
公开(公告)号：JP2004154851A
公开(公告)日：2004-06-03
申请号：JP2002325363
申请日：2002-11-08
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： WADA YASUHIRO , NAKAMURA YOSHITAKA , OIKAWA YUSUKE
IPC分类号： B21B1/16 , B21B1/20 , B21B13/00 , B21B27/02
CPC分类号： B21B1/20
摘要： PROBLEM TO BE SOLVED: To provide a rolling method for preventing the generation of a spiral unevenness, namely a spiral mark generated on the outer surface of a rolling material after rolling in rolling using a rolling mill for a planetary inclined roll. SOLUTION: In the rolling using the rolling mill for the planetary inclined roll, the rolling is performed using a roughly conical roll and its arrangement satisfying the relationship expressed by the following expression, K=D r /äα×(β-α 2 )}≥0.02, wherein Dr is the ratio (D r =D f, min /D M, out ) between the minimum diameter D f,min of a rolling part of the roughly conical roll and the outer diameter D M, out of the rolling material after rolling, α is an offset angle (unit:°) of the roll arranged in the rolling mill for the planetary inclined roll, α 2 is an inclination angle (unit:°) formed by a ridgeline and a roll shaft centerline of the rolling part of the roughly conical roll, and β is a roll shaft inclination angle (unit:°) of the roll arranged in the rolling mill for the planetary inclined roll. The generation of the spiral mark can be prevented to such level as no practical problem by applying the rolling method. COPYRIGHT: (C)2004,JPO

2. 发明专利

JPH09296220A HEAT HOLDING FURNACE FOR ROLLING OF BAR AND WIRE, PIPE AND SHAPE STEEL 失效
公开(公告)号：JPH09296220A
公开(公告)日：1997-11-18
申请号：JP11383596
申请日：1996-05-08
申请人： NIPPON STEEL CORP , NITTETSU PLANT DESIGNING CORP
发明人： TERAMAE AKIRA , NAKAMURA YOSHITAKA , MURATA YOSHIHIKO , TSUKAGOSHI KAZUMOTO , SHIYOUMOTO IKUO
IPC分类号： B21B45/00 , C21D1/00 , C21D9/00
摘要： PROBLEM TO BE SOLVED: To provide a heat holding furnace for rolling of a bar and wire, pipe and shape steel which can quickly and safely deal with a work in the heat holding furnace developed occurred due to working trouble after following process. SOLUTION: In the heat holding furnace 3 arranged between a heating furnace 1 and a rolling mill 5 in a rolling equipment for the bar steel, steel wire, steel pipe or the shape steel, a burner combustion type heating means as a temp. compensating means having a furnace length longer than the length of roll base stock so as to be possible to oscillate the roll base stock, a carrying table (roller) 4 in the furnace, a detecting means for detecting the front and the rear end parts of the roll base stock, and a control means for controlling reversal revolution switchings of the carrying table, are provided.

3. 发明专利

JPH09268357A METHOD FOR HEATING CYLINDRICAL BILLET OF PURE TITANIUM AND TITANIUM ALLOY 失效
公开(公告)号：JPH09268357A
公开(公告)日：1997-10-14
申请号：JP8037696
申请日：1996-04-02
申请人： NIPPON STEEL CORP
发明人： TAKAHASHI KAZUHIRO , KAWAKAMI SATORU , YAMAMOTO SATOSHI , NAKAMURA YOSHITAKA
IPC分类号： B21B3/00 , C22F1/18
摘要： PROBLEM TO BE SOLVED: To provide a heating method by which the bend of the billet of a pure titanium and a titanium alloy can be reduced at the time of subjecting them to rolling into a bar, a wire or a tubular material. SOLUTION: In a heating stage before rolling, using a walking beam type heating furnace rotatively carrying a cylindrical billet with an axis as the center, it is rotated at the rotating speed of 6 to 36 deg./min for one or more rotations at the holding temp. of 680 to 850 deg.C as for pure titanium, 780 to 900 deg.C as for an α+βtype alloy and 950 to 1150 deg.C as for α or β type alloy, by which the bend of the billet present from the first can be reduced. Moreover, its temp. is raised for

4. 发明专利

JPH0613122B2 失效
公开(公告)号：JPH0613122B2
公开(公告)日：1994-02-23
申请号：JP28898586
申请日：1986-12-05
申请人： NIPPON STEEL CORP
发明人： FUKUOKA IENOBU , NAKAMURA YOSHITAKA , KAWAMURA TOSHIHIKO , MURATA WATARU
IPC分类号： B21B1/16 , B21B1/18 , B21B39/14

5. 发明专利

JPH05179361A PRODUCTION OF HIGH-CARBON MARTENSITIC STAINLESS STEEL WIRE 失效
公开(公告)号：JPH05179361A
公开(公告)日：1993-07-20
申请号：JP34753091
申请日：1991-12-27
申请人： NIPPON STEEL CORP
发明人： SAKAKIBARA MIZUO , KAWAMURA TOSHIHIKO , YOSHIMURA KOICHI , NAKAMURA YOSHITAKA
IPC分类号： C21D6/00 , C21D8/06 , C21D9/00 , C21D9/52
摘要： PURPOSE:To provide the process for production of the high-carbon martensitic stainless steel wire having a problem in martensite transformation crack. CONSTITUTION:The process for production of the martensitic stainless steel wire contg., by weight %, >=25% and =1 minutes and

6. 发明专利

JPH05179360A PRODUCTION OF HIGH CARBON MARTENSITIC STAINLESS STEEL WIRE ROD 失效
公开(公告)号：JPH05179360A
公开(公告)日：1993-07-20
申请号：JP34753191
申请日：1991-12-27
申请人： NIPPON STEEL CORP
发明人： SAKAKIBARA MIZUO , KAWAMURA TOSHIHIKO , YOSHIMURA KOICHI , NAKAMURA YOSHITAKA
IPC分类号： C21D6/00 , C21D8/06 , C21D9/52
摘要： PURPOSE:To produce a high carbon martensitic stainless steel wire rod having the problem of martensitic transformation cracking. CONSTITUTION:When a high carbon martensitic stainless steel wire rod contg. 0.6-1.2wt.% carbon is hot-rolled, finish rolling is completed at >=1,100 deg.C and cooling from >=1,000 deg.C to 500 deg.C is carried out at >=10 deg.C/sec cooling rate. By this method, the surface structure of the wire rod is transformed into a retained austenite structure and martensitic transformation cracking is prevented.

7. 发明专利

JPS63144801A ROLLING METHOD FOR BAR 失效
公开(公告)号：JPS63144801A
公开(公告)日：1988-06-17
申请号：JP28898586
申请日：1986-12-05
申请人： NIPPON STEEL CORP
发明人： FUKUOKA IENOBU , NAKAMURA YOSHITAKA , KAWAMURA TOSHIHIKO , MURATA WATARU
IPC分类号： B21B1/16 , B21B1/18 , B21B39/14
摘要： PURPOSE:To decrease surface flaws of a bar by rolling down and sizing the free deformation surface of a material to be rolled of the previous pass rolling at specific drafts with non-driven rolls, then subjecting the material to the rolling of the ensuing pass. CONSTITUTION:After the material to be rolled is rolled by box caliber rolls 1-1 of a horizontal stand, the free surface of the material is sized at 0.1-30% draft by the non-driven sizing rolls 7 and is then rolled by oval caliber rolls 1-2. The recesses 3 and angle parts 4 of the free deformation surface of the material rolled by the box caliber rolls 1-1 are rolled down and sized by the sizing rolls 7 and are then rolled by the rolls 1-2; therefore, generation of overlapping flaws and folding flaws is obviated. Bite is smoothly executed and the rolling reduction in the peripheral direction of the material is uniformized so that the material is rolled without having the overlapping flaws and folding flaws even in the case of rolling the material by the oval caliber rolls 1-2, then twisting the material 90 deg. and rolling the free deformation surface by the H stand of the round caliber rolls 1-3 and in the case of rolling the free deformation surface by the V stand of the round caliber rolls 1-3 without rolling the material by the oval caliber rolls.

8. 发明专利

JPH07214103A METHOD FOR ROLLING WIRE ROD 失效
公开(公告)号：JPH07214103A
公开(公告)日：1995-08-15
申请号：JP807194
申请日：1994-01-28
申请人： NIPPON STEEL CORP
发明人： NAKAMURA YOSHITAKA , KAWAMURA TOSHIHIKO , TAGAMI MUTSUAKI , FUKUOKA IENOBU
IPC分类号： B21B1/18 , B21B1/16 , B21B37/00 , B21B37/16
摘要： PURPOSE:To simplify a equipment train in a wire rod mill by optimally designing the load on equipment. CONSTITUTION:Such nondriven rolls 7a, 7b as the radii R1 of the nondriven rolls 7a, 7b and roll gap 2R+H1 satisfy prescribed conditions are provided between the vertical rolls 2a on the upstream side and the horizontal rolls 3a, 3b on the downstream side and a steel material l is formed so that the steel material which is rolled with the vertical rolls 2a on the upstream side is stably bitten into the horizontal rolls 3a, 3b on the downstream side. In this way, a miss roll is prevented and stable wire rod rolling is realized without especially making the rolling mill large.

9. 发明专利

JPH06218421A METHOD FOR HEATING AND TRANSFERRING ROLLED STOCK AND CONTROLLER THEREFOR 失效
公开(公告)号：JPH06218421A
公开(公告)日：1994-08-09
申请号：JP1193793
申请日：1993-01-27
申请人： NIPPON STEEL CORP
发明人： NAKAMURA YOSHITAKA , SATANO YUTAKA , NAKAGAWA KATSUYUKI , OKAMOTO MANABU , SAKAKIBARA MIZUO , TERAMAE AKIRA
IPC分类号： B21B45/00 , C21D9/60 , C21D11/00
摘要： PURPOSE:To prevent the end part from being cut off by supplying a preceeding rolled stock and a succeeding rolled stock continuously to an induction heating furnace and heating the, while an interval between them is held to a specific dimension. CONSTITUTION:Billets which have received a primary heating are sent out one by one to a delivery table. when a steel material detector 9 does not detect the existence of the billets, the table 2 is driven to deliver the billets to a speed adjusting table 4. When the steel material detector 9 detects the delivered billets, the drive of the table 2 is changed over to a synchronous transmission. The detector 10 detects the end of the preceeding material, the billets on the speed adjusting table 4 is made to approach the billets of last tail of the induction heating furnace 6 at a fast speed and sent to the long side of the billet orthogonally crossed to the transferring direction or within a distance less than 10% of the diameter. The concentrated magnetic flux is reduced in the front and rear end part and the temperature deviation from the other parts is decreased.

10. 发明专利

JPH05302114A 失效
公开(公告)号：JPH05302114A
公开(公告)日：1993-11-16
申请号：JP10702392
申请日：1992-04-24
申请人： NIPPON STEEL CORP
发明人： SADANO YUTAKA , SAKAKIBARA MIZUO , MATSUI TAKASHI , NAKAMURA YOSHITAKA , TERAMAE AKIRA
IPC分类号： C21D1/34 , C21D1/74 , C21D1/76 , C21D9/00
摘要： PURPOSE:To reduce the generation of oxidation at the time of heating a rolling blank and to improve the quality of a steel material. CONSTITUTION:The rolling blank is heated in a heating furnace 1 in the ordinary atmosphere (2-6% O2 concn.) till grain boundary oxidation critical temp. (1000 deg.C) having no problem to the oxidation, thereafter, at the time of exceeding the grain boundary oxidation critical temp. (1000 deg.C), the rolling blank is heated in an induction heating furnace 2 in the non-oxidizing atmosphere (gaseous argon) to allow the blank to be in a rolling temp. Thus, the yield and the quality in the hot rolling process are improved.

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