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1. 发明专利

JPH0452263A PRODUCTION OF HOT-DIPPED STRIP-LIKE METAL 失效
公开(公告)号：JPH0452263A
公开(公告)日：1992-02-20
申请号：JP16472990
申请日：1990-06-21
申请人： NIPPON STEEL CORP , ONAKA ITSUO
发明人： YAMAGUCHI SUSUMU , MIKI TOSHIHIKO , UCHIDA HIROYUKI , ONAKA ITSUO
IPC分类号： C23C4/14
摘要： PURPOSE:To add the effects of the characteristics due to mixed powder without deteriorating the characteristics of a plating metal itself by mixing dissimilar powder with a molten metal to be sprayed. CONSTITUTION:The inside of the system of equipment 10 is regulated, e.g., to an inert gas atmosphere. A strip-like metal S is introduced into a plating chamber 3, and a powder-mixed molten metal MP is sprayed from both sides of the strip S by means of spray nozzles 5 accompanied by a gas through gas pipes 4 for atomization. The above powder-mixed molten metal MP is obtained by blending a powder P from powder vessels 7 having powder throw-in regulation valves 6 with a molten metal M in molten metal vessels 8 and mixing them uniformly by means of agitating devices 9. As the powder P mixed into the molten metal M to be sprayed, metal powder, metal oxide, metal nitride, metal carbide, metal boride, etc., having relatively high melting points can be applied. By this method, the amount of dispersion of the powder in the plated layer can be arbitrarily selected, and the resulting plated sheet can immediately meet the characteristics required of a plated sheet.

2. 发明专利

JPH0452262A PRODUCTION OF HOT-DIP ZINC ALLOY COATED STRIP-LIKE METAL 失效
公开(公告)号：JPH0452262A
公开(公告)日：1992-02-20
申请号：JP16472890
申请日：1990-06-21
申请人： NIPPON STEEL CORP , ONAKA ITSUO
发明人： YAMAGUCHI SUSUMU , MIKI TOSHIHIKO , UCHIDA HIROYUKI , ONAKA ITSUO
IPC分类号： C23C4/14 , C23C4/18
摘要： PURPOSE:To obviate the necessity of an alloying furnace of large capacity and to prevent the occurrence of brittle zinc-iron alloy layer by spraying a molten zinc-iron alloy in the course of or on the outlet of a continuous annealing furnace and then carrying out rapid cooling. CONSTITUTION:The whole plating apparatus 10 is held in a nonoxidizing atmosphere. A zinc-iron alloy from melting pots 1 is refined and sprayed by means of spraying devices 2 on a traveling strip-like steel sheet S in the course of or on the outlet of a continuous annealing furnace. Directly after the above, cooling is performed by means of cooling devices 3 having gas jet nozzles at about 10-200 deg.C/sec cooling rate, by which a plated steel sheet is obtained. Cooling finishing temp. is regulated to a temp. not higher than the melting point of the sprayed molten metal. When the steel sheet is heated up to a temp. not lower than the melting point of the zinc-iron alloy and further held for >=0.1sec after molten metal spraying and before rapid cooling, the surface of the sprayed molten metal is allowed to flow and the smoothness of the plated surface can be improved.

3. 发明专利

JPH0266144A DEVICE OF PREVENTING OXIDATION OF STEEL SHEET OF PRODUCTION EQUIPMENT COMMONLY USED FOR PLATED STEEL SHEET AND COLD ROLLED STEEL SHEET 失效
公开(公告)号：JPH0266144A
公开(公告)日：1990-03-06
申请号：JP21589488
申请日：1988-08-29
申请人： NIPPON STEEL CORP
发明人： YAMAGUCHI SUSUMU , UEMATSU NOBUO , MIKI TOSHIHIKO , MURATANI MASANORI , TOMINAGA KAZUMI , NAKAJIMA TADAMI , SAWADA KEN , MURAKAMI NOBUKAZU
IPC分类号： B21B1/22 , B21B45/00 , C23C2/00
摘要： PURPOSE:To produce products having excellent quality by partitioning a hot dip coating cell to an inlet side and outlet side by a partition wall provided in proximity to an inlet side deflector roll disposed right above a hot dip coating bath, thereby facilitating the control of the respective atmospheres. CONSTITUTION:A steel sheet 6 is passed through the plating cell consisting of the hot dip coating bath 1 and the inlet/outlet side furnace walls 2, 3 and is passed through the inside of the bath 1 from an inlet side deflector roll 4 via a sink roll 7 to form the plated steel sheet. The steel sheet is otherwise passed toward the outlet side deflector roll 9 by which the cold rolled steel sheet is produced. The above-mentioned inlet side deflector roll 4 is disposed right above the bath 1 and the partition wall 5 is disposed in proximity thereto via a heat resistant sealing material 12 at the bottom end with the above-mentioned production equipment commonly used for the plated steel sheet and cold rolled steel sheet of the heat treatment furnace. The plating cell is partitioned to an inlet side space 10 to be introduced with the steel sheet 6 and an outlet side space 11 above the hot dip coating bath 1. The oxidation in the inlet side space 10 is prevented in this way and the oxygen concn. is increased in the outlet side space 11, by which the evaporation of the metal is prevented.

4. 发明专利

JPH0261045A PLATING METAL SQUEEZING DEVICE OF PRODUCTION EQUIPMENT FOR PLATED STEEL SHEET AND COLD-ROLLED STEEL SHEET 失效
公开(公告)号：JPH0261045A
公开(公告)日：1990-03-01
申请号：JP21337888
申请日：1988-08-27
申请人： NIPPON STEEL CORP
发明人： YAMAGUCHI SUSUMU , UEMATSU NOBUO , MIKI TOSHIHIKO , MURAKAMI NOBUKAZU , TOMINAGA KAZUMI , NAKAJIMA TADAMI , MURATANI MASANORI , SAWADA KEN
IPC分类号： B21B1/22 , B21B1/38 , B21B45/02 , C23C2/00
摘要： PURPOSE:To control the bringing out of a plating metal and to switch the processes without any trouble by squeezing out the plating metal deposited on a steel sheet with a specially provided squeezing roll when a wiping device is retreated to switch the processes. CONSTITUTION:When the plated steel sheet production process is switched over to the cold-rolled steel sheet production process, the conveyance of a steel sheet 6 is stopped, the wiping device, sink roll, and squeezing device are retreated to loosen the steel sheet 6. A squeezing roll 8a is pushed out by a cylinder 9 and pressed on the steel sheet 6, a squeezing roll 8b is pressed on the steel sheet 6 by turning an arm 10, the steel sheet 6 is clamped by the squeezing rolls 8a and 8b, the steel sheet 6 is traveled for a specified time, and the plating bath 1 deposited on the surface of the steel sheet 6 is squeezed out. When the squeezing is finished, the squeezing rolls 8a and 8b are respectively retreated, the steel sheet 6 is wound on a deflector roll 7 for a cold-rolled steel sheet, and the process is switched over to the cold-rolled steel sheet production process. By this method, the plating metal is not brought into the succeeding stage, and the occurrence of trouble such as abnormal operation is avoided.

5. 发明专利

JPH0247245A HOT DIP COATING METHOD USING BRUSH ROLL 失效
公开(公告)号：JPH0247245A
公开(公告)日：1990-02-16
申请号：JP19924388
申请日：1988-08-09
申请人： NIPPON STEEL CORP
发明人： YAMAGUCHI SUSUMU , UEMATSU NOBUO , MIKI TOSHIHIKO , FURUYAMA TERUO
IPC分类号： B05B3/02 , C23C2/00 , C23C2/14
摘要： PURPOSE:To facilitate and speed up switching of production of a plated steel sheet and a cold rolled steel sheet and switching of plating kinds by providing a flow rate controller in plating baths and regulating the flow rate of the plating metal which flows down from slits and is splashed by brush rolls. CONSTITUTION:The plating device is disposed on both sides of the transporting path for the steel sheet 1. The flow rate controllers 15 are provided in the plating liquid 13 to regulate the down flow rate of the plating metal flowing in the lower slits 14. The plating metal flowing down from bath cells 11 is splashed toward the surface of the steel sheet 1 by the brush rolls 16 provided below the bath cells 11 and is stuck to both the surfaces of the steel sheet 1. Only the one plating device is used in case of plating on one side. The kinds of the plating metals to be poured into the respective bath cells 11 are changed in case of applying different platings on the front and rear of the steel sheet 1. The steel sheet is passed through both the plating devices without using said devices in case of producing the cold rolled steel sheet.

6. 发明专利

JPH01312060A WIPING NOZZLE 失效
公开(公告)号：JPH01312060A
公开(公告)日：1989-12-15
申请号：JP14329088
申请日：1988-06-09
申请人： NIPPON STEEL CORP
发明人： YAMAGUCHI SUSUMU , UEMATSU NOBUO , MIKI TOSHIHIKO
IPC分类号： C23C2/20
摘要： PURPOSE:To easily and rapidly remove a foreign matter, such as plating metal sticking to a slit by locating the gas injection hole of a blower so that it is opposed to the slit of a wiping nozzle and also making this gas injection hole movable in the longitudinal direction of the slit. CONSTITUTION:A blower 3 consisting of a tube part 6 and a quartz tube 10 is inserted via a sealing means 5 into a wiping nozzle 1 and disposed so that the gas injection hole 11 of the blower 3 can be opposed to a slit 2. When the slit 2 is clogged with a sticking matter, the blower 3 is moved forward by means of a cylinder 4 to make the injection hole 11 face the slit 2. Subsequently, an inert gas is introduced through a tube 7 into the tube part 6 and heated by means of a heater 12 in the quartz tube 10 to allow a high-temp. gas 14 to blow out through the injection hole 11 so as to melt and blow off the sticking matter on the slit 2, and then, the injection hole 11 is moved along the slit 2. Further, it is preferable to provide an auxiliary blower 15 orthogonal to the slit 2 so as to prevent the blown-off sticking matter from sticking again to the outside surface of the nozzle 1.

7. 发明专利

JPS63266083A SURFACE TREATMENT OF METALLIC STRIP 失效
公开(公告)号：JPS63266083A
公开(公告)日：1988-11-02
申请号：JP10030787
申请日：1987-04-22
申请人： NIPPON STEEL CORP
发明人： YAMAGUCHI SUSUMU , CHIKASAWA FUMIICHIRO
IPC分类号： C23G3/02 , C23C22/73 , C25D7/06
摘要： PURPOSE:To prevent or control a temp. drop in a processing soln. flowing in a treating vessel by providing a heat insulating layer on the cylindrical treating vessel through which a metallic strip is passed. CONSTITUTION:The surface of the metallic strip 1 is treated in the cylindrical treating vessel 2 while being brought into counter-current contact with the processing soln. 4 introduced from an inlet 3. A steam pipeline 12, etc., for thermal insulation are provided on the outer periphery of the treating vessel 2, a heat insulting material 13 is wound on the outer periphery of the treating vessel 2 to warp in the steam pipeline 12, and the radiation of the heat of the processing soln. 4 through the peripheral wall of the treating vessel 2 is controlled. In addition, thermocouples 14a and 14b are respectively provided on the processing soln. 4 inlet and outlet sides of the treating vessel 2, and the temp. change is measured. By this method, the deterioration of the processing soln. 4 due to the temp. drop is prevented, and surface treatment can be carried out with high efficiency.

8. 发明专利

JPS63264207A DEVICE FOR CHANGING ROLLING ROLL IN ROLLING MILL 失效
公开(公告)号：JPS63264207A
公开(公告)日：1988-11-01
申请号：JP10030587
申请日：1987-04-22
申请人： NIPPON STEEL CORP
发明人： FUJII TAISUKE , YAMAGUCHI SUSUMU , YOSHIURA AKINOBU , ISHIHARA AKIRA
IPC分类号： B21B31/10
摘要： PURPOSE:To smoothly perform roll change and preparation for the next operation and to improve the mill operating ratio by changing upper and lower rolling rolls of a mill along rails and a side mechanism by use of changing carriages and changing rolls to and from the side mechanism and the carriage. CONSTITUTION:Rolling rolls a1, a2 in a rolling mill 1 are connected 13A to a changing carriage 6 and pulled out along rails 7, 8. New rolls b1, b2 at a stand-by position c1 are changed with the old rolls a1, a2 and are installed in the mill 1 by a side shift device 14. The used rolls a1, a2 at the stand-by position c2 of the device 14 are sent onto a transfer carriage 18 at a roll changing position 17 by connection 13B with the carriage 6 and new rolls on another transfer carriage 18 are pulled onto the device 14 to prepare the succeeding change. By the above operations, changing rolls and preparation for the next operation are smoothly performed to improve the operating ratio of the mill. It is also performable to install a roll storage rack between the transfer carriages 18.

9. 发明专利

JPS62277539A EVALUATING METHOD FOR QUALITY OF CONTINUOUS CASTING PIECE 失效
公开(公告)号：JPS62277539A
公开(公告)日：1987-12-02
申请号：JP12008286
申请日：1986-05-27
申请人： NIPPON STEEL CORP
发明人： YAMAGUCHI SUSUMU , IHATA TADASHI , UEMURA TAKESHI
IPC分类号： G01N21/67
摘要： PURPOSE:To evaluate a flaw in a product steel material at the stage of a casting piece by detecting an inclusion present under the surface of the casting piece which is formed by curved mold continuous casting by applying a light emission analytic method, etc., and estimating the surface quality of the final product (steel material) from the detected quantity. CONSTITUTION:Molten metal S in a tundish T is injected into a mold M through a dipped nozzle N. Then, the casting piece 1 which is cooled and solidified is drawn downward by pinch rollers P which are formed in a curved shape to cast the casting piece 1 continuously. At this time, a scale (black skin) on a surface to be inspected at the center part of the surface L of the casting piece 1 is removed by specific thickness, i.e. about 2-3mm and the inclusion in the casting piece 1 is analyzed by the light emission analytic method. Then, alumina which is the inclusion causing the generation of a linear flaw in the casting piece 1 and Ca, Na, etc., which are inclusions causing the generation of a white spot are detected. Thus, the linear flaw and white spot of a steel plate are estimated at the stage of the casting piece, so the casting piece having inclusions is removed from the process to improve the manufacture yield.

10. 发明专利

JPS6241806B2 失效
公开(公告)号：JPS6241806B2
公开(公告)日：1987-09-04
申请号：JP20046284
申请日：1984-09-27
申请人： NIPPON STEEL CORP
发明人： CHIKASAWA FUMIICHIRO , YAMAGUCHI SUSUMU
IPC分类号： B21B27/06 , B21B27/10 , B21B45/02

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