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1. 发明专利

JPH09323103A MANUFACTURE OF COLD ROLLED STAINLESS STEEL STRIP 失效
公开(公告)号：JPH09323103A
公开(公告)日：1997-12-16
申请号：JP15918096
申请日：1996-05-31
申请人： KAWASAKI STEEL CO
发明人： SONOBE OSAMU , KANO HIROTAKA , KENMOCHI KAZUHITO , ITO HIROYUKI , FUKUHARA AKIHIKO
IPC分类号： B21B3/02 , B21B1/22 , B21B27/00 , B21B27/03
摘要： PROBLEM TO BE SOLVED: To produce a high-quality material excellent in surface gloss at high efficiency by applying work rolls consisting of specific sintered hard alloy to stands and specifying the average surface roughness of the work roll and draft at the final stand. SOLUTION: In the manufacture of a cold rolled stainless steel strip using a cold tandem mill, the work rolls consisting of a WC base sintered hard alloy are applied to the stands including at least the final stand. Rolling is executed by taking the average surface roughness Ra of the work rolls of the final stand as 0.005-0.15μm and the draft of the final stand as >=25%. In this way, the cold rolled stainless steel strip having excellent surface gloss is obtained.

2. 发明专利

JPH09253708A METALLI STRIP COLD ROLLING METHOD 失效
公开(公告)号：JPH09253708A
公开(公告)日：1997-09-30
申请号：JP6755396
申请日：1996-03-25
申请人： KAWASAKI STEEL CO
发明人： ITO HIROYUKI , AZUMA SUSUMU , FUKUHARA AKIHIKO
IPC分类号： B21B37/00 , B21B1/22 , B21B37/46 , B21C51/00
摘要： PROBLEM TO BE SOLVED: To prevent a heat streak by continuously measuring a cold rolling plate thickness on the mill inlet side, detecting the start of an abnormal plate thickness section whose deviation to a set value deviates from an allowable range, decreasing a rolling speed, and detecting the completion of the section to restore the rolling speed. SOLUTION: At the time when a thick plate section 1A whose plate thickness deviation on the first stand inlet side, which is continuously measured by a plate thickness meter in the longitudinal direction of the strip metal 2, exceeds an upper limit value αH, is detected before the thick plate section 1A is bit by a mill, the rolling speed is decreased from a normal set value β to a set value γH corresponding to the thick plate section 1A, and rolling is performed. The heat streak caused by a high reduction of area in the first stand, can be prevented. When the plate thickness deviation on the first stand inlet side exceeds a lower limit value αs, the rolling speed is decreased from the set value β to γs corresponding to a thin plate section 1R and the rolling is performed. An oil film quantity in roll bite is decreased, a frictional force becomes high, and a slip in the thin plate section 1B can be prevented.

3. 发明专利

JPH0985305A MANUFACTURE OF BRIGHT FINISHED MATERIAL OF HIGH CARBON STEEL 失效
公开(公告)号：JPH0985305A
公开(公告)日：1997-03-31
申请号：JP24995195
申请日：1995-09-27
申请人： KAWASAKI STEEL CO
发明人： IRI MASATO , FUKUHARA AKIHIKO , ITO HIROYUKI
IPC分类号： B21B1/36 , B21B1/22 , C21D8/02
摘要： PROBLEM TO BE SOLVED: To avoid scratching on the surface of a steel sheet at the time of annealing and coiling/uncoiling of coil between processes and to sufficiently execute shape correction by executing dull-rolling with dull rolls in place of bright-rolling in the final pass of cold rolling and, next, executing temper rolling by wet-rolling at a specified elongation percentage. SOLUTION: The rising of the surface roughness of the steel sheet caused in the final pass of cold rolling of the sheet having carbon content of 0.2-1.3wt.% by dull-rolling is satisfactorily reduced by bright-temper rolling of a succeeding process at the elongation percentage of >=1.0 and the surface roughness of products equal to conventional products is secured. And, annealing is executed provided that the hardness of the base material after annealing is lowered by the rising amount of hardness by temper rolling. That is, by executing annealing provided that softening is sufficiently executed and lowering the hardness before temper rolling by the rising amount of hardness, required product hardness is attained. As the method for sufficiently executing softening at the time of annealing, annealing time is prolonged or annealing temp. is elevated.

4. 发明专利

JPH07188690A TEMPER ROLLING OIL 失效
公开(公告)号：JPH07188690A
公开(公告)日：1995-07-25
申请号：JP33519993
申请日：1993-12-28
申请人： KAWASAKI STEEL CO , QUAKER CHEM NIPPON
发明人： BABA YUKIHIRO , YAMAGUCHI MAKOTO , UCHIDA YASUTAKA , ITO HIROYUKI , IKEDA TOSHIKAZU , OGIWARA SEIJI
IPC分类号： C10M173/02 , C10N30/12 , C10N40/24
摘要： PURPOSE:To provide a water-soluble temper rolling oil which can enable easy shape control without causing staining of the rolling mill in the temper rolling of a hard material such as a silicon steel sheet and can further enable high-draft temper rolling by mixing specified compounds with each other in a specified mixing ratio. CONSTITUTION:This oil is prepared by mixing 3-10wt.% 4-12 C aliphatic dibasic acid with 1-6wt.% 8-20 C saturated fatty acid, 2-12wt.% 14-18 C monoenoic carboxylic acid, 1-15wt.% arylsulfonamidecarboxylic acid and 5-25wt.% alkanolamine. Desirable examples of the monoenoic carboxylic acids include myristoleic acid, palmitoleic acid and oleic acid. Especially, a combination of lauric acid with oleic acid is desirable as the combination of the saturated fatty acid with the monoenoic carboxylic acid. An example of the alkanolamine is monoethanolamine. This oil is diluted with water to a concentration of 5-20% before use.

5. 发明专利

JPH04279205A WASHING METHOD OF ENDLESS FILTER WHICH IS USED FOR FILTERING COOLANT FOR COLD ROLLING MILL 失效
公开(公告)号：JPH04279205A
公开(公告)日：1992-10-05
申请号：JP4151591
申请日：1991-03-07
申请人： KAWASAKI STEEL CO
发明人： ITO HIROYUKI , KAWASUMI EISUKE
IPC分类号： B01D33/04 , B01D24/46 , B01D33/44 , B01D33/58 , B21B27/10
摘要： PURPOSE:To prevent clogging of filter and to prolong the life of filter by using detergent for washing a cold rolling mill and simultaneously washing an endless filter when washing the cold rolling mill. CONSTITUTION:At the time of rolling work, after opening a suction valve 18a for coolant pump, closing a suction valve 18b, opening a return valve 19a and closing a return valve 19b, coolant is sprayed on the filter 2 and the endless filter 2 is washed. And, at the time of washing work of the cold rolling mill 15, after closing the suction valve 18a for coolant pump, opening the suction valve 18b, closing the return valve 19a and opening the return valve 19b, mill washing liquid is sprayed on the endless filter 2 and strong washing effect is achieved. Then, used detergent is returned to a mill washing liquid tank 17 through a return piping 16, so the detergent is not mixed in the coolant.

6. 发明专利

JPH0994605A COLD ROLLING METHOD FOR STRIP METAL 失效
公开(公告)号：JPH0994605A
公开(公告)日：1997-04-08
申请号：JP25135995
申请日：1995-09-28
申请人： KAWASAKI STEEL CO
发明人： ITO HIROYUKI , AZUMA SUSUMU , FUKUHARA AKIHIKO
IPC分类号： B21B37/00 , B21B37/38
摘要： PROBLEM TO BE SOLVED: To prevent edge crack breakage by adjusting a roll bending force applied to both end parts in the width direction of a strip metal held with a work roll so as to reduce the force along the increase of time used of the work roll based on the curve between continuous time used of the work roll and roll bending force set beforehand and constantly rolling in an edge buckling state. SOLUTION: A tendem mill having from a first to a forth stand is arranged between a payoff reel 1 and a coiling reel 2, roll benders 41-44 are arranged to work rolls 31-34 of each stand. Each roll bender is connected to a controller 5, movement of each roll bender 41-44 is controlled in response to an electrical signal from the controller 5, as a result, the roll bending force applied to both ends in the width direction of each stand is controlled.

7. 发明专利

JPH09236418A DEFECTIVE HOLE DETECTOR OF METALLIC STRIP 失效
公开(公告)号：JPH09236418A
公开(公告)日：1997-09-09
申请号：JP4232596
申请日：1996-02-29
申请人： KAWASAKI STEEL CO
发明人： SASAKI HIROAKI , ITO HIROYUKI
IPC分类号： G01B11/30 , B21B1/26 , B21B37/00 , B21B38/02 , G01N21/89 , G01N21/894 , G01N21/93
摘要： PROBLEM TO BE SOLVED: To discover a method for detecting a defective hole of a metallic strip in consideration with relative positional errors caused by tracking operation, by referencing data representing positions and numbers of detected holes, and relationship between regions of detected holes and specific regions of removed holes. SOLUTION: A running metallic strip is observed at a hole detection section and data of detection holes which are sequentially detected is fetched into a data processing section, then positions thereof in the width and longitudinal directions are determined. The data of the position in the longitudinal direction is compared with a data of a welding hole in relation to the longitudinal direction of the metallic strip obtained from a host computer beforehand, then the detected hole is discriminated to determine if it is defective. At that time, an existing position of the detected hole in the width direction, the number of detected holes existing in a welding hole region including a welding hole position which is regarded as a tracking error and relationship between the existing region of the plural detected holes in the welding hole region, and a predetermined removal region are used as references for the judgment. Thus, a method for detecting the defective hole of the metallic strip is discovered.

8. 发明专利

JPH04258309A METHOD FOR OPERATING BRUSH TYPE PLATE SURFACE WASHER OF STEEL STRIP 失效
公开(公告)号：JPH04258309A
公开(公告)日：1992-09-14
申请号：JP1853591
申请日：1991-02-12
申请人： KAWASAKI STEEL CO
发明人： ITO HIROYUKI , KAWASUMI EISUKE
IPC分类号： B08B1/02 , B21B45/02 , B21B45/06
摘要： PURPOSE:To prolong the life of a brush of a brush type plate surface washer for a steel strip equipped on the inlet side of a cold rolling mill and to efficiently remove a hard foreign matter stuck on the surface of the steel strip. CONSTITUTION:In the operating method of brush type plate surface washer 3 for the steel strip 1 equipped on the inlet side of a cold rolling mill 2, only a prescribed area before and behind a welded point of the steel strip 1 is washed as number of rotation of brushes 5a, 5b and/or the rolling down force of the brush are increased.

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