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71. 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.

72. 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.

73. 发明专利

JPH09248611A METHOD FOR CONTROLLING SHEET THICKNESS IN CONTINUOUS TYPE TUNDEM ROLLING MILL 失效
公开(公告)号：JPH09248611A
公开(公告)日：1997-09-22
申请号：JP259697
申请日：1997-01-10
申请人： KAWASAKI STEEL CO
发明人： KIJIMA HIDEO , KENMOCHI KAZUHITO , IRI MASATO , SUNAMORI YASUMICHI , FUKUHARA AKIHIKO , OKADA KAZUHITO , MIYAHARA MORIYUKI
IPC分类号： B21B37/00 , B21B37/26
摘要： PROBLEM TO BE SOLVED: To improve the precision of a sheet thickness and to obtain the improvement of the yield by correcting the rolling position in a first stand based on an effective coefficient obtd. at the time of existing at the front of a sheet thickness meter and deviation of the sheet thickness at the initial side detected at the time of passing through the sheet thickness meter. SOLUTION: The deviation of a preceding material 1a to the sheet thickness at the inlet side of the sheet thickness setting and the deviation of the sheet thickness of a following material 1b at the front and the rear sides of a welding point P are measured with the inlet side sheet thickness meter 2, and the load variating value is calculated from these deviation and calculated effective coefficient. The sum of a second rolling reduction positional changing quantity and a first rolling reduction positional changing quantity as the output from a process computer 3 is calculated and on the other hand, just after the welding point P passes through the first stand, the sum is outputted to a rolling reduction control device 5a from a rolling reduction positional computing element 4 to change the rolling reductional position of the first stand. By this method, the sheet thickness changing control is precisely executed during the traveling and the yield is improved.

74. 发明专利

JPH09201612A METHOD FOR CONTROLLING THICKNESS AND TENSION OF METALLIC STRIP IN TANDEM COLD ROLLING MILL 失效
公开(公告)号：JPH09201612A
公开(公告)日：1997-08-05
申请号：JP897496
申请日：1996-01-23
申请人： KAWASAKI STEEL CO
发明人： KIJIMA HIDEO , KENMOCHI KAZUHITO , FUKUHARA AKIHIKO , OKADA KAZUHITO , MIYAHARA MORIYUKI
IPC分类号： B21B37/00 , B21B37/18 , B21B37/48
摘要： PROBLEM TO BE SOLVED: To prevent the development of mutual slippage between a plate and a roll during rolling while keeping the plate thickness precision by cold-rolling the plate thickness at the outlet side of a last stand with correction of roll speed at the one stand before the last stand. SOLUTION: In a tandem cold-rolling mill, a tension 12c detected with a tension meter 11c between a second and a third stands is transferred to a rolling roll speed changing quantity calculator 9c to calculate the rolling roll speed changing quantity. The rolling roll speed of the second stand is changed according to this rolling roll speed changing quantity of correct the tension between the second and the third stands. Even if the plate thickness at the outlet side of a fourth stand thins and the roll speed at the third stand is accelerated and the slippage is developed, since pressurizing position in the stand is not changed and the plate thickness at the outlet side is not thickened. Since the rolling reduction position is not changed even if the tension is worked in the rising side, the slippage is not promoted even if the slippage is developed and then, the effect due to the slippage is not developed to the product quality and the rolling roll.

75. 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.

76. 发明专利

JPH06344016A METHOD FOR CONTROLLING SHAPE IN SHEET ROLLING 失效
公开(公告)号：JPH06344016A
公开(公告)日：1994-12-20
申请号：JP13605593
申请日：1993-06-07
申请人： KAWASAKI STEEL CO
发明人： NAKAGAWA TAKETSUGU , KAWASUMI EISUKE , KARASAWA MASAAKI , FUKUHARA AKIHIKO , KOMATSU TOMIO
IPC分类号： B21B37/00 , B21B37/28 , B21B37/42
摘要： PURPOSE:To provide a method for controlling shape by which the high accuracy of shape in sheet rolling is attained. CONSTITUTION:At the time of controlling the shape of sheet by adjusting shape controlling means in the process of changing the sheet size of thickness or width of a sheet during rolling with use of a cold rolling mill in which intermediate rolls 5, 6 having a profile of a cubic curve or a sine curve are arranged between work rolls 1, 2 and back-up rolls 3, 4, the target value S of shift position of the intermediate rolls is determined taking the abrasive loss of the intermediate rolls 5, 6 with a rolling distance into consideration and, by shifting the intermediate rolls 5, 6 based on the target value, good shape control is always executed.

77. 发明专利

JPH066206B2 失效
公开(公告)号：JPH066206B2
公开(公告)日：1994-01-26
申请号：JP7057889
申请日：1989-03-24
申请人： KAWASAKI STEEL CO
发明人： EBIHARA MASANORI , AMAGASA TOSHIAKI , MANO TAKA , FUKUHARA AKIHIKO
IPC分类号： B21B1/22 , B21B3/02 , B21B45/00 , C21D9/56

78. 发明专利

JPH0452006A MANUFACTURE OF COLD ROLLED STAINLESS STEEL STRIP 失效
公开(公告)号：JPH0452006A
公开(公告)日：1992-02-20
申请号：JP15544690
申请日：1990-06-15
申请人： KAWASAKI STEEL CO
发明人： KENMOCHI KAZUHITO , YARITA YUKIO , KAWASUMI EISUKE , FUKUHARA AKIHIKO , KOMATSU TOMIO , KAKIUCHI HIROYUKI
IPC分类号： B21B1/22 , B21B3/02 , B21B27/10
摘要： PURPOSE:To obtain excellent surface gloss by rolling a steel strip by taking liquid lubricant on the surface of work roll as a specified thickness and, from a 2nd stand on, rolling it by supplying the rolling oil of a specified viscosity, taking the roughness of work roll as not more than a specified value and taking the diameter of the work roll of the final stand as a specified value. CONSTITUTION:Rolling is done as the liquid lubricant is applied

79. 发明专利

JPH0352702A WARM ROLLING EQUIPMENT FOR STAINLESS STEEL STRIP 失效
公开(公告)号：JPH0352702A
公开(公告)日：1991-03-06
申请号：JP18479989
申请日：1989-07-19
申请人： KAWASAKI STEEL CO
发明人： EBIHARA MASANORI , AMAGASA TOSHIAKI , FUKUHARA AKIHIKO , KAWAI YOSHITO , OSADA MASAFUMI
IPC分类号： B21B1/26 , B21B3/02 , B21B39/08 , B21B45/00
摘要： PURPOSE:To keep the temperature of strip steel at a prescribed temperature on the inlet side of a rolling mill even if passage speed is changed by providing a heat-holding device between a heating device and a tandem mill. CONSTITUTION:The heat-holding device 9 is provided between the heating device 1 and the rolling mill 2, and bridle rolls 4 are enclosed. The heat-holding device 9 is composed of a heat insulating material 10 and an electric heater 11 to compensate radiation heat is provided inside. After a stainless steel strip 3 is heated with the heating device 1, it is entered into the rolling mill 2 while the heat is held. Therefore, even if transfer speed is changed, the temperature isn't decreased and the prescribed temperature is held and rolling can be uniformly performed.

80. 发明专利

JPH02299705A METHOD FOR ROLLING STAINLESS STEEL STRIP 失效
公开(公告)号：JPH02299705A
公开(公告)日：1990-12-12
申请号：JP12117389
申请日：1989-05-15
申请人： KAWASAKI STEEL CO
发明人： MATSUMOTO MASAJI , KOMATSU TOMIO , FUKUHARA AKIHIKO
IPC分类号： B21B1/22 , B21B45/02
摘要： PURPOSE:To enable a high speed rolling of stainless steel strip high in surface glossiness by providing >=1 set of wringer rolls between stands composing tandem mills. CONSTITUTION:At the outlet of a rolling roll 1 of a stand I the stock solution of rolling oil is injected by a strip coolant header 31 on the surface of the steel strip to cool the stainless steel strip S. After the original liquid on the surface of the steel strip is squeezed by a 1st wringer roll 41, the stock solution of the rolling oil is injected by spray headers 5 provided among each wringer roll 41 - 44 and wear particle is removed by oil reservoirs formed at the inlets of the respective wringer rolls 41 - 44. The steel strip is cleaned by each wringer roll are rolled by a stand II. Further, concerning the stock solution of the rolling oil supplied to the inlet sides of the wringer rolls, of the sur face area of the stainless steel strip passing the stand I can give enough mirror face glossiness.

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