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1. 发明专利

DE2558241A1 未知
公开(公告)号：DE2558241A1
公开(公告)日：1976-07-08
申请号：DE2558241
申请日：1975-12-23
申请人： KUROSAKI REFRACTORIES CO , MISHIMA KOSAN CO LTD , KITAKYUSHU FUKUOKA , NIPPON STEEL CORP
发明人： URY TADOO , KOIZUMI FUSAKAZU , MATSUO TERUMOTO , HONDA KAZUMICHI , KITAKYUSHU FUKUOKA , IKEHARA YASUNOBU , YANAI TAKASHI
IPC分类号： G01F1/00 , B22D11/20 , G01G17/06 , B22D11/10
摘要： A method of regulating the flow of molten metal through the pour opening of a vessel is disclosed which is characterized by a combination of a pair of load detecting elements and a contactor which is disposed between the load detecting elements such that there is effected control of a hydraulic cylinder for actuating a sliding control nozzle which is capable of moving bit-by-bit resulting in the fine regulation of the sliding control nozzle.

2. 发明专利

JPH08309483A CONTINUOUS CASTING METHOD FOR STAINLESS STEEL CONTAINING BORON 失效
公开(公告)号：JPH08309483A
公开(公告)日：1996-11-26
申请号：JP13565895
申请日：1995-05-11
申请人： NIPPON STEEL CORP
发明人： NAKANO TAKESHI , YAMAMOTO TETSUYA , MATSUZAKI HIDEO , YANAI TAKASHI
IPC分类号： B22D11/00 , B22D11/10 , B22D11/108 , B22D11/16 , B22D11/20 , B22D11/22
摘要： PURPOSE: To prevent generation of the uneven surface or surface crack of the slab by prescribing the casting temperature, the melting point of the powder, the casting speed, the oscillation condition, and the specific water amount in achieving the continuous casting of stainless steel containing boron. CONSTITUTION: In the continuous casting of stainless steel containing >=0.1% boron, the casting is achieved with the casting speed and under the oscillation condition where the powder temperature index δT defined by the formula I is >=150 deg.C to =0.1 to

3. 发明专利

JPH0732092A METHOD FOR CONTINUOUSLY CASTING STAINLESS STEEL 失效
公开(公告)号：JPH0732092A
公开(公告)日：1995-02-03
申请号：JP20015093
申请日：1993-07-21
申请人： NIPPON STEEL CORP
发明人： NAKANO TAKESHI , OKIMORI MAYUMI , YOSHIMURA YUJI , YANAI TAKASHI , MATSUMURA SHOGO
IPC分类号： B22D11/00 , B22D11/10 , B22D11/11 , B22D11/112 , B22D11/116 , B22D11/117 , C21C7/00
摘要： PURPOSE:To provide a stainless steel continuously casting method floating up and separate the non-metallic inclusion in molten steel in a tundish after reducing [S] and [O] in the molten steel. CONSTITUTION:At the time of continuously casting, the molten steel adjusted so that PV value defining contents of [S], [O] and [Ca] with the equation I becomes =5min. The equation I: PV value =[S(ppm)]+[O(ppm)-]-(0.8X[Ca(ppm)])=30. The equation II: The molten steel staying time in the tundish (h)=W/(sXVXrho). Wherein, W is molten steel wt. in the tundish (kg), s is cross sectional area of the mold (mm ), V is casting velocity (mm/min), rho: density of the molten steel (kg/mm ).

4. 发明专利

JPS62176641A CORE ENSHROUD CONTINUOUS CASTING METHOD 失效
公开(公告)号：JPS62176641A
公开(公告)日：1987-08-03
申请号：JP1577686
申请日：1986-01-29
申请人： NIPPON STEEL CORP
发明人： MATSUMURA SHOGO , TAKEUCHI HIDEMA , YANAI TAKASHI
IPC分类号： B22D11/00 , B22D11/04
摘要： PURPOSE:To improve productivity of casting slab by inserting a core, which is penetrated through combined mold connected with an intermediate vessel, keeping a molten metal to pour in the intermediate vessel and also drawing the casting slab together with the core in a body, while vibrating the mold. CONSTITUTION:The intermediate vessel 2 is arranged at above the mold 1 and an insulating ring 3 is inserted between both. A positioning guide 6 is arranged in the vessel 2, and the core 5 is penetrated through the guide 6, and a core enclosing ring 7 is arranged at near the molten metal surface position in the vessel 2. Non-active gas is blowed on a boundary surface between the core 5 and the molten metal from a pipe 8, while pouring the molten metal, so as to keep the molten metal surface at a position of the core enclosing ring 7. Next, a casting is executed by drawing the slab 9 and the core 5 at the same time, while vibrating the mold 1 and the vessel 2 at vertical direction. As friction between the slab 9 and the mold 1 is reduced, casting speed is quickened. Therefore, productivity of the slab 9 is improved.

5. 发明专利

JPS6054253A POWDER SPRAYING METHOD IN CONTINUOUS CASTING 失效
公开(公告)号：JPS6054253A
公开(公告)日：1985-03-28
申请号：JP16245983
申请日：1983-09-03
申请人： NIPPON STEEL CORP
发明人： OOGURO HARUO , IWASAKI TOSHIHIRO , HIROKANE TAKAAKI , YANAI TAKASHI
IPC分类号： B22D11/10 , B22D11/108
摘要： PURPOSE:To enable feeding of powder at a constant rate and uniform displaying thereof into a mold with a small amt. of a carrier gas with a method for spraying the powder pneumatically by adopting the form of suspended transportation. CONSTITUTION:The inside of a tank 1 is pressurized and a stop valve 3 is repeatedly opened and closed at set timings. Powder is approximately filled in a storage tank 43 by one time of said opening. The powder is discharged through a discharge port 47 and is dispersed by a conical-shaped projecting part 45, by which the powder is dropped in a dispersed state through plural through-holes 46. The powder in the mid-way of falling is forcibly fed in a feed pipe 5 by the pressure gas ejected from an injector 7A. The powder is fed in the pipe 5 in a suspended state. If the pipe is long and the pressure drop in the pipe is large, the powder in the pipe 5 is additionally fed by an injector 7B. The powder is accelerated and transported in suspension while the powder is enclosed and dispersed in the air flow having a suction effect in the feed direction in the injector 7. The powder is thus uniformly sprayed in a casting mold 10.

6. 发明专利

JPS5847260B2 JPS5847260B2 - 失效
公开(公告)号：JPS5847260B2
公开(公告)日：1983-10-21
申请号：JP13669075
申请日：1975-11-13
申请人： Nippon Steel Corp
发明人： KAWASAKI SHIGERU , KAWABATA TOKUFUSA , IKEHARA YASUMASA , YANAI TAKASHI
IPC分类号： B22D27/02 , B22D11/10 , B22D11/115

7. 发明专利

JPS5298622A METHOD OF JUDGING END POINT OF POURING IN CONTINUOUS CASTING 失效
公开(公告)号：JPS5298622A
公开(公告)日：1977-08-18
申请号：JP1522276
申请日：1976-02-14
申请人： NIPPON STEEL CORP
发明人： IKEHARA YASUMASA , YANAI TAKASHI , KOMANO TADAAKI
IPC分类号： B22D2/00 , B22D11/10 , B22D45/00

8. 发明专利

JPS5260228A ELECTROMAGETIC STIRRING IN CONTINUOUS CASTING 失效
公开(公告)号：JPS5260228A
公开(公告)日：1977-05-18
申请号：JP13669275
申请日：1975-11-13
申请人： NIPPON STEEL CORP
发明人： TAKEDA MASAO , IKEHARA YASUMASA , YANAI TAKASHI
IPC分类号： B22D27/02 , B22D11/10 , B22D11/115

9. 发明专利

JPS5260226A ELECTROMAGNETIC STIRRING IN CONTINUOUS CASTING 失效
公开(公告)号：JPS5260226A
公开(公告)日：1977-05-18
申请号：JP13669075
申请日：1975-11-13
申请人： NIPPON STEEL CORP
发明人： KAWASAKI SHIGERU , KAWABATA TOKUFUSA , IKEHARA YASUMASA , YANAI TAKASHI
IPC分类号： B22D27/02 , B22D11/10 , B22D11/115

10. 发明专利

JPH07258720A METHOD FOR REFINING AUSTENITIC STAINLESS STEEL HAVING EXCELLENT HOT WORKABILITY 失效
公开(公告)号：JPH07258720A
公开(公告)日：1995-10-09
申请号：JP5383794
申请日：1994-03-24
申请人： NIPPON STEEL CORP
发明人： FUKUMOTO SHIGEO , TANAKA SHIGENORI , YANAI TAKASHI , IWASAKI HIROSHI , OKIMORI MAYUMI
IPC分类号： C21C7/06 , C21C7/00 , C21C7/064 , C21C7/068 , C21C7/072
摘要： PURPOSE:To drastically reduce the development of surface crack flaw at the time of hot-rolling by achieving extra low sulfur and extra low oxygen in the refining of an austenitic stainless steel. CONSTITUTION:The decarburize-treatment is executed by oxidizerefining in a main-refining furnace to execute the reducing treatment for recovering the chromium oxidize by the decarburize-treatment with an alloy mainly containing silicon, and successively, the treated molten steel is tapped into a ladle from the main refining furnace and the powder injecting treatment is executed in the ladle to execute the refining of the stainless steel. In this powder injecting method, the powder containing 40-80wt.% CaO and 20-60wt.% CaF2 is blown at 3kg/ton of molten steel together with inert gas to make the molten steel

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