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1. 发明专利

JPH07223017A METHOD FOR PREVENTING CAUSE OF SURFACE FLAW OF HOT ROLLED STAINLESS STEEL STRIP 失效
公开(公告)号：JPH07223017A
公开(公告)日：1995-08-22
申请号：JP4052694
申请日：1994-02-15
申请人： NIPPON KOKAN KK
发明人： OKAZAKI YUKIHIKO , TSUCHIYA YOSHIRO
IPC分类号： B21B3/02 , B21B45/08 , C21D1/82 , C23G3/02
摘要： PURPOSE:To easily and completely prevent cause of line flaws of a hot rolled stainless steel strip within the restriction range of the schedules of a hot rolling stage without increasing the production cost. CONSTITUTION:The surface roughness RMAX(mum) of a stainless steel slab in production of the hot rolled steel strip to be hot rolled after heating of this slab at 1100 to 1350 deg.C corresponds to the equation expressed by the heating temp. ( deg.C) of the slab: RMAX>-0.6XT+840. In such a case, the discharge pressure P of hot rolling and rough descaling water is so controlled that the impingement pressure p(kgf/cm ) of the hot rolling and rough descaling water against the hot rolled material as expressed by the equation p=0.05757X(Q/A) XP by the flow rate Q(l/min) of the hot rolling and rough descaling water, the impingement area A(cm ) against the hot rolled material and the discharge pressure P(kgf/cm ) of the hot rolling and rough descaling water satisfies the equation p>={RMAX-(-0.6XT+840)}/3.

2. 发明专利

JPH09253735A DESCALING METHOD IN HOT ROLLING 失效
公开(公告)号：JPH09253735A
公开(公告)日：1997-09-30
申请号：JP6853696
申请日：1996-03-25
申请人： NIPPON KOKAN KK
发明人： OTAKE TAKAYUKI , ISHII YOSHIHIDE , OKAZAKI YUKIHIKO
IPC分类号： B21B45/08 , C23G5/00
摘要： PROBLEM TO BE SOLVED: To economically obtain a hot rolled steel plate excellent in surface property by specifying a distance from steel plate to nozzle, injection pressure, water quantity density, etc., to a prescribed value or range so as to improve a scale flaw removing efficiency at hot rolling. SOLUTION: Factor to decide descaling capability at hot rolling is not only a colliding pressure of high pressure water. Even though the colliding pressure is same an injection pressure from a nozzle, a water quantity density, a distance between nozzle and steel plate produce a large difference in descaling capability. Prior to finish rolling, high pressure water is injected toward the surface of steel plate from a nozzle having a distance of =101/cm.min water quantity density. Even though the colliding pressure is same.

3. 发明专利

JPH05245525A 失效
公开(公告)号：JPH05245525A
公开(公告)日：1993-09-24
申请号：JP4868592
申请日：1992-03-05
申请人： NIPPON KOKAN KK
发明人： SASAKI TAKETO , TANAKA KENJI , OKAZAKI YUKIHIKO
IPC分类号： B21B37/00 , B21B37/68 , B21B39/14 , B65H23/025
摘要： PURPOSE:To control the meandering of the material of thin thickness and broad width by setting one or more meandering correcting rollers retreatable upward and to be able to skew to the horizontal direction against the table roller axis and setting the pressing force adjustable. CONSTITUTION:For the top end of a material 6, meandering correcting rollers 1a, 1b are retreated upward from the material 6 by turning an arm 2b with a cylinder 5. At the stage that the top end of the material enters to the device, the meandering correcting rollers 1a, 1b are lowered with the cylinder 6 and the floating or clattering of the material 6 is prevented. And when a certain amount of meandering is generated in the material, the meandering correcting rollers 1a, 1b are moved with cylinders 7a, 7b by the angle according to the meandering amount, the meandering side is brought to skew to the advancing direction and together the most suitable pressing force is applied with the cylinder 5, and so the meandering of the material generating during transferring is corrected.

4. 发明专利

JP2853559B2 失效
公开(公告)号：JP2853559B2
公开(公告)日：1999-02-03
申请号：JP6617094
申请日：1994-04-04
申请人： NIPPON KOKAN KK
发明人： OKAZAKI YUKIHIKO
IPC分类号： B21B45/08

5. 发明专利

JPH06328116A DEVICE FOR COOLING STRIP 失效
公开(公告)号：JPH06328116A
公开(公告)日：1994-11-29
申请号：JP12104893
申请日：1993-05-24
申请人： NIPPON KOKAN KK
发明人： SASAKI TAKETO , OKAZAKI YUKIHIKO
IPC分类号： B05B1/26 , B21B45/02 , C21D9/52
摘要： PURPOSE:To make the capacity of slow cooling adjustable and to improve the accuracy of coiling temp. by movably arranging an impeller type spraying device right under an upper laminar nozzle. CONSTITUTION:By oerating an operating rod 3, the impeller 1 is moved in the position shown by chain line. The laminar flow of cooling water which flows out of the nozzle 6a of a laminar pipe 6 is broken with the impeller 1 and sprayed cooling function is lowered, so a strip 8 which is transported on table rollers 7 is slowly cooled. On the other hand, in the case of executing ordinary laminar cooling, by returning the operating rod 3 and situating the impeller 1 in the position shown by continuos line, the impeller 1 is deviated from the laminar flow from the laminar pipe 6 and cooling by the laminar flow is possible. The tip nozzle of a compressed air line 5 is made so as to touch the vanes of the impeller 1 and, in this way, by arbitrarily adjusting the number of revolution of the impeller 1 by changing the pressure and flow rate of compressed air and changing the spray range, the cooling function is adjusted.

6. 发明专利

JPH05192707A METHOD FOR CONTROLLING COILING TEMPERATURE OF STEEL STRIP 失效
公开(公告)号：JPH05192707A
公开(公告)日：1993-08-03
申请号：JP2886592
申请日：1992-01-20
申请人： NIPPON KOKAN KK
发明人： OKAZAKI YUKIHIKO , WAKAMATSU IKUO , MIHARA KISHO
IPC分类号： B21B37/00 , B21B37/76 , B21B45/02 , B21C47/26
摘要： PURPOSE:To improve cooling efficiency and to enable accurate coiling temp. control. CONSTITUTION:Jetting nozzles 2 for jetting cooling water on the surface of a moving steel strip 1 and a water temp. controlling mechanism 6 for controlling the temp. of cooling water are provided and, while controlling the temp. of cooling water which is circulated through conduits 4 by the action of a water pump 3 with the water temp. controlling mechanism 6, cooling water is jetted on the surface of the steel strip 1 from the jetting nozzles 2. In this way, the coiling temp. of the steel strip 1 is controlled.

7. 发明专利

JP2658787B2 失效
公开(公告)号：JP2658787B2
公开(公告)日：1997-09-30
申请号：JP34381992
申请日：1992-12-24
申请人： NIPPON KOKAN KK
发明人： OKAZAKI YUKIHIKO
IPC分类号： B21B15/00 , B23D25/12 , B23D33/00 , B23D36/00

8. 发明专利

JPH07275921A METHOD FOR DISCALING AT THE TIME OF HOT ROLLING 失效
公开(公告)号：JPH07275921A
公开(公告)日：1995-10-24
申请号：JP6617094
申请日：1994-04-04
申请人： NIPPON KOKAN KK
发明人： OKAZAKI YUKIHIKO
IPC分类号： B21B45/08
摘要： PURPOSE:To provide a method for descaling at the time of hot rolling, by which hard-to-peel scale can be peeled and removed without being restricted by the heating temperature of a slab and the component of a steel. CONSTITUTION:At the time of the manufacture of a steel sheet by hot rolling, in descaling using water jet to be performed before finish rolling, when presuming that the discharge pressure of supplying high pressure water at a supply port, is P (kg/cm ), discharged water amount per nozzle, is Q (l/min), nozzle height is H (distance from a nozzle tip to the surface of a billet, mm), and material speed is v (m/min), this is a method for descaling at the time of hot rolling, which satisfies an inequality I or an inequality II if possible. However, x, y and z are numbers exceeding 0, and F(v) is the function of (v) which becomes large as the (v) becomes large. P .Q /H >=F (v)... I P .Q /H >=14v-370... II.

9. 发明专利

JPH05245524A 失效
公开(公告)号：JPH05245524A
公开(公告)日：1993-09-24
申请号：JP4868492
申请日：1992-03-05
申请人： NIPPON KOKAN KK
发明人： SASAKI TAKETO , TANAKA KENJI , OKAZAKI YUKIHIKO
IPC分类号： B21B37/00 , B21B37/68 , B21B39/00 , B21B39/14
摘要： PURPOSE:To provide the meandering control device suitable for the material of thin thickness and broad width. CONSTITUTION:The equipment transferring the belt like material 6 at the hot or cold rolling time with a roller table 3, the meandering control device is provided with table rollers 4a-4c more than one piece of the roller table in freely steering upward and pressing rollers 1a-1b retreatably upward at the upper side.

10. 发明专利

JPH05192708A DEVICE FOR CONTROLLING TEMPERATURE IN BREADTHWISE DIRECTION AND COILING TEMPERATURE OF STEEL STRIP 失效
公开(公告)号：JPH05192708A
公开(公告)日：1993-08-03
申请号：JP2886492
申请日：1992-01-20
申请人： NIPPON KOKAN KK
发明人： OKAZAKI YUKIHIKO
IPC分类号： B21B37/00 , B21B37/76 , B21B45/02 , B21C47/26
摘要： PURPOSE:To provide a device with which temp. control in the breadthwise direction and coiling temp. control of steel strip can be executed at the same time. CONSTITUTION:A shutter 2 on which plural lines of hole rows 71, 72, 73 with different length that consist of plural lines of grooves 6 and plural holes 8 are formed is moved back and forth in the longitudinal direction of steel strip with a shutter moving means 3, either of the grooves 6 or the hole rows 71, 72, 73 are situated under a cooling water header 1 having nozzles 5 and cooling water which is ejected from the nozzles 5 is interrupted by the grooves 6 or passed through the holes 8. By selecting either of the grooves 6 or the hole rows 71, 72, 73, temp. control in the breadthwise direction and coiling temp. control of steel strip are executed at the same time.

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