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1. 发明专利

JPS6277158A DEVICE FOR CONTROLLING FLOW OF MOLTEN METAL FOR TWIN ROLL TYPE CONTINUOUS CASTING INSTALLATION 失效
公开(公告)号：JPS6277158A
公开(公告)日：1987-04-09
申请号：JP21830285
申请日：1985-09-30
申请人： NIPPON STEEL CORP , NITTETSU PLANT DESIGNING CORP
发明人： NIIOKA MASAKI , ISHIKAWA YOSHIYASU , KAMIYOSHI TOYOHIKO , ICHINOSE MAKOTO
IPC分类号： B22D11/06
摘要： PURPOSE:To make the quality in a molten metal uniform and the quality of a thin metallic sheet uniform by disposing coils and cores for controlling the flow of the molten metal above a molten metal pool. CONSTITUTION:The cores 8 wound with the coils 7 are disposed above the molten metals pool and a control device 9 to pass AC or DC current to the coils 7 is provided. The AC current is supplied to the coils 7 to form a progressive magnetic field in the case of stirring the molten metal. On the other hand, the DC current is supplied to the coils 7 in the case of suppressing the flow of the molten metal. Linear type coils are used for the coils 7 and cores to generate the progressive or DC magnetic field.

2. 发明专利

JPS6277156A TWIN ROLL TYPE CONTINUOUS CASTING DEVICE 失效
公开(公告)号：JPS6277156A
公开(公告)日：1987-04-09
申请号：JP21830085
申请日：1985-09-30
申请人： NIPPON STEEL CORP , NITTETSU PLANT DESIGNING CORP
发明人： NIIOKA MASAKI , ISHIKAWA YOSHIYASU , KAMIYOSHI TOYOHIKO , ICHINOSE MAKOTO
IPC分类号： B22D11/06
摘要： PURPOSE:To prevent the formation of solidified shells on the inside wall of side dams by providing induction heaters in proximity to the side dams in the stage of passing the molten metal from a molten metal pool delineated of water cooled rolls and the side dams to a roll gap and producing a thin metallic sheet. CONSTITUTION:The induction heaters 7, 8 are disposed in proximity to the side dams 3, 4 so as to face the side dams. Current of a prescribed frequency is supplied from an AC power source to coils 7b, 8b of the heaters 7, 8. Magnetic fluxes are formed between both legs of the respective cores 7a, 8a and the magnetic fluxes pass through the inside of the molten metal 5 near the dams 3, 4 via the dams 3, 4 so that eddy current is generated in the molten metal 5 and the molten metal 5 generates heat. The molten metal 5 stored between the side dams 3, 4 is consequently heated or insulated and is thus prevented from solidification.

3. 发明专利

JPS6277157A DEVICE FOR CONTROLLING FLOW OF MOLTEN METAL FOR TWIN ROLL TYPE CONTINUOUS CASTING INSTALLATION 失效
公开(公告)号：JPS6277157A
公开(公告)日：1987-04-09
申请号：JP21830185
申请日：1985-09-30
申请人： NIPPON STEEL CORP , NITTETSU PLANT DESIGNING CORP
发明人： NIIOKA MASAKI , ISHIKAWA YOSHIYASU , KAMIYOSHI TOYOHIKO , ICHINOSE MAKOTO
IPC分类号： B22D11/06
摘要： PURPOSE:To make the quality in a molten metal uniform and the quality of a thin metallic sheet uniform by constituting water cooled rolls of a nonmagnetic material and disposing coils and cores for controlling the flow of the molten metal is said rolls. CONSTITUTION:The water cooled rolls 1, 2 are constituted of the hollow nonmagnetic material and the cores 8 wound with the coils 7 are disposed to the molten metal side therein. A control device 9 for passing AC or DC current to the coils 7 is provided. The AC current is passed to the coils 7 to form a progressive magnetic field in the case of stirring the molten metal. On the other hand, the DC current is supplied to the coils 7 in the case of suppressing the flow of the molten metal. The flow control of the molten metal from an extremely short distance from the molten metal is thus executed.

4. 发明专利

JPH02138467A DIFFERENTIAL PRESSURE SEALING METHOD 失效
公开(公告)号：JPH02138467A
公开(公告)日：1990-05-28
申请号：JP13736589
申请日：1989-06-01
申请人： NIPPON STEEL CORP
发明人： ISHIKAWA YOSHIYASU , OKAGO HARUHITO , OKAMOTO MANABU , NAGASHIMA SHOJI
IPC分类号： C23C14/56
摘要： PURPOSE:To prevent the generation of flaws and stains on the treated surface of a strip, etc., by providing plural differential pressure vacuum chambers between a high-pressure vacuum treatment chamber and a low-pressure vacuum treatment chamber and controlling the pressures thereof to specific values at the time of subjecting the material, such as strip, to surface treatments in the two chambers of the different pressures. CONSTITUTION:The material to be treated, such as strip, is subjected to the surface treatment by a method, such as plasma CVD, in the high-pressure vacuum treatment chamber P1 and is then passed through slits S1 to S5 in the plural differential pressure chambers D1 to D4 and is subjected to the 2nd surface treatment by a method, such as sputtering, in the low- pressure vacuum treatment chamber P2. The pressure in the respective differential pressure chambers D1 to D4 are gradually lowered in this case; in addition, the pressure in the differential pressure chamber D1 adjacent to the high-pressure vacuum treatment chamber P1 is so controlled as to be higher than the pressure in the low-pressure vacuum treatment chamber P1. The pressure in the differential pressure D4 adjacent to the low-pressure vacuum treatment chamber P2 is so controlled as to be lower than pressure in the high-pressure vacuum treatment chamber P2, and the pressure differences between the respective differential pressure chambers are controlled to specified values. The intrusion of the treating gas and contaminants in the high-pressure vacuum treatment chamber P1 into the low-pressure vacuum treatment chamber P2 is prevented and, therefore, the surface-treated strip having the treated surface free from flaws and stains is obtd.

5. 发明专利

JPH05146853A METHOD FOR CONTINUOUSLY CASTING MOLTEN METAL 失效
公开(公告)号：JPH05146853A
公开(公告)日：1993-06-15
申请号：JP33581591
申请日：1991-11-27
申请人： NIPPON STEEL CORP
发明人： ISHIKAWA YOSHIYASU , ICHIKI HIROBUMI
IPC分类号： B22D11/04 , B22D11/10 , B22D11/115 , B22D11/16
摘要： PURPOSE:To secure flowing of powder for lubrication into gap between a cast slab and the inner surface of a mold even at the time of casting molten metal in high speed and to prevent breakout caused by burning of the molten metal or a solidified shell to the mold. CONSTITUTION:To electromagnetic coils 5 surrounding the mold 1 and the molten metal 2 and divided in the vertical direction, ACs having different phases are conducted. By this method, arched magnetic flux 8 detoured after reaching to near the surface layer of the molten metal 2, is shifted downward and the electromagnetic force to inside downward is applied to the circumferential part of the molten metal. By the component in the center direction of the electromagnetic force, meniscus of the molten metal is curved as the projecting state, and flowing of the powder into between the molten metal and the mold is promoted. By the downward component, the molten metal, solidified shell and semi-solidified metal, are shifted downward without stagnating to one position and the burning caused by the stagnant is prevented.

6. 发明专利

JPH03287773A MULTISTAGE PLASMA TREATMENT 失效
公开(公告)号：JPH03287773A
公开(公告)日：1991-12-18
申请号：JP8751290
申请日：1990-04-03
申请人： NIPPON STEEL CORP
发明人： HAKODA YOSHIKAZU , ISHIKAWA YOSHIYASU , TAKENOUCHI KOJI
IPC分类号： C23C16/50 , C23C16/54
摘要： PURPOSE:To form a good-quality film at a high rate and to improve the treating efficiency at the time of depositing a thin film on a strip substrate to be treated in a multistage treating chamber by progressively increasing the pressure, supplied power and gas flow rate as the operating condition toward the succeeding treating chamber from the preceding treating chamber and carrying out plasma treatment. CONSTITUTION:A strip substrate 8 to be treated is passed through the treating chambers 2a, 2b and 2c and treated with plasma as follows. Namely, a film highly adhesive to the substrate is formed in the chamber 2a with the low pressure, low power and low gas flow rate (however the film forming rate is low). The film forming rate is increased with the medium pressure, medium power and medium gas flow rate in the chamber 2b. A film is formed at a high rate with the high pressure, high power and high gas flow rate in the chamber 2c. In this multistage plasma treatment, a good-adhesion film is formed at a high rate unlike the conventional method, the treating time is reduced, and the productivity is improved.

7. 发明专利

JPH03277771A SPUTTER DEVICE 失效
公开(公告)号：JPH03277771A
公开(公告)日：1991-12-09
申请号：JP7568190
申请日：1990-03-27
申请人： NIPPON STEEL CORP
发明人： FUJIYAMA HIROSHI , MATSUDA YOSHINOBU , ISHIKAWA YOSHIYASU
IPC分类号： C23C14/35 , C23C14/34
摘要： PURPOSE:To keep the erosion uniform on the target surface and to improve the utilizing efficiency of target by providing the means which generates the AC magnetic field perpendicular to the electric field generated between the neighboring targets. CONSTITUTION:DC voltage is impressed between plural targets 2a, 2b disposed in a vacuum vessel 4 from a DC power source 5a for discharge so that the target 2a is to be a cathode. DC electric field E11a is generated between the targets 2a, 2b, and glow discharge plasma 10 is generated. When AC is streamed through a coil from an AC power source 7a for coil, AC magnetic field 12 perpendicular to DC electric field 11a is generated, and the plasma scanning 3 due to EXB drift is carried out in the vicinity of the target 2a. The reciprocating motion of plasma is carried out even on the area where erosion is faster progressed on the surface of the targets 2a, 2b, and the utilizing efficiency of targets 2a, 2b is improved.

8. 发明专利

JPH05138311A DEVICE FOR CONTROLLING FLOW RATE OF MOLTEN STEEL INTO MOLD FOR CONTINUOUS CASTING 失效
公开(公告)号：JPH05138311A
公开(公告)日：1993-06-01
申请号：JP31099791
申请日：1991-11-26
申请人： NIPPON STEEL CORP
发明人： ISHIKAWA YOSHIYASU , ICHIKI HIROBUMI , NOMOTO KAZUHITO
IPC分类号： B22D11/10 , B22D11/103 , B22D11/18
摘要： PURPOSE:To reduce wearing of an inner wall by arranging a pinch force generating device on the outer periphery of contracting part of a nozzle and reducing the contacting shock of molten steel to the inner wall of the nozzle. CONSTITUTION:On the outer periphery of the contracting part 3 of the nozzle communicated with the inner part of a mold from a molten steel incorporating vessel, the pinch force generating device, such as a cylindrical solenoid coil 5 surrounding this contracting part, is arranged and by impressing an AC electric source to this position, the pinch force with an AC magnetic field generated along the longitudinal direction of the nozzle in the inner part of the nozzle is concentrated to the center part higher than to the inner wall of the nozzle. By this method, the contacting shock of the molten steel to the inner wall at this part is reduced and the wearing of the inner wall can be reduced.

9. 发明专利

JPH03207866A PLURAL-ELECTRODE TYPE PLASMA GENERATOR 失效
公开(公告)号：JPH03207866A
公开(公告)日：1991-09-11
申请号：JP71090
申请日：1990-01-08
申请人： NIPPON STEEL CORP
发明人： TAKENOUCHI KOJI , ISHIKAWA YOSHIYASU
IPC分类号： C23C16/50 , C23F4/00 , H01L21/205 , H01L21/302 , H01L21/3065
摘要： PURPOSE:To increase plasma density of the gap parts of the electrodes and to enhance treatment efficiency by providing a phase controller and performing the phase control of high-frequency voltage impressed to the electrodes for generating plasma. CONSTITUTION:High-frequency voltage is impressed to a plurality of electrodes 2a-d for generating plasma from the power sources 5a-d in the evacuated atmosphere. Plasma is generated between the electrodes 2a-d and the earth electrodes 3a-d and a base plate 7 to be treated is treated. In the plural-electrode type plasma generator, a phase controller 9 is provided and the phase of high-frequency voltage impressed to the electrodes 2a-d is controlled. Thereby the intensity of an electric field in the gap parts of the electrodes and the plasma density are increased and treatment efficiency is enhanced.

10. 发明专利

JPS63153268A METHOD FOR CONTROLLING PARTIAL PRESSURE OF GAS IN CONTINUOUS DRY COATING TANK 失效
公开(公告)号：JPS63153268A
公开(公告)日：1988-06-25
申请号：JP29898986
申请日：1986-12-17
申请人： NIPPON STEEL CORP
发明人： HOSOI YOSHIRO , OKAMOTO MANABU , NAGASHIMA SHOJI , ISHIKAWA YOSHIYASU
IPC分类号： C23C14/54 , C23C14/56
摘要： PURPOSE:To stably and simply control the partial pressure of reactive gases in a coating tank by setting the ratio between the flow rates of the gases, comparing the detected internal total pressure of the coating tank with the desired pressure and regulating the total flow rate of the gases. CONSTITUTION:The ratio between the flow rates of reactive gases such as N2 and Ar is set at the optimum value. When the internal total pressure of an IP device 2 measured with a vacuum gauge V is lower than the desired degree of vacuum for operation, a PID controller and a proportional amplifier K output a signal for increasing the flow rates of the gases. By the signal, the flow rates of the gases flowing through mass flow controllers 12 are increased so that the internal total pressure of the device 2 is made close to the desired degree of vacuum for operation. When the internal total pressure of the device 2 is higher than the desired degree of vacuum, the PID controller and the amplifier K output a signal for reducing the flow rates of the gases. By the pressure control, the ratio between the amts. of the gases in the device 2 is made nearly uniform and the partial pressures of the gases in a coating tank can be made nearly constant.

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