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1. 发明专利

JPS596735B2 JPS596735B2 - 失效
公开(公告)号：JPS596735B2
公开(公告)日：1984-02-14
申请号：JP11856378
申请日：1978-09-28
申请人： Nippon Steel Corp
发明人： UEZAKI HIROKUNI , OOKUBO NAOTAKE , OOTA MITSUHIRO
IPC分类号： B22D11/16 , B22D11/114 , B22D27/08
CPC分类号： B22D11/114

2. 发明专利

JPH02182347A STEEL MATERIAL HAVING SOUND CENTER PART AND PRODUCTION THEREOF 失效
公开(公告)号：JPH02182347A
公开(公告)日：1990-07-17
申请号：JP146289
申请日：1989-01-07
申请人： NIPPON STEEL CORP
发明人： YAMAGATA KAZUYA , ARAMAKI HIROMI , KOJIMA MASAMICHI , UEZAKI HIROKUNI
IPC分类号： B21B1/02 , B22D11/00 , B22D11/124
摘要： PURPOSE:To obtain a steel material having sound center part without any segregation and porosity with continuous casting by making difference in secondary cooling water quantities in center part and circumferential part on the same plane at long side in a cast slab and making displacement of the last solidified position. CONSTITUTION:In the continuous casting, the secondary cooling water quantities in the center part and the circumferential part on the same plane at the long side of the cast slab are made to differ and the initial solidified shell is formed so as to displace the last solidified position of the cast slab from the center at cross sectional face to both width direction. Ratio of the displacement R, while is shown with R=(r'/r)X100%, is made to >=30%. Wherein, r': length from the center at the cross sectional face of the cast slab to the last solidifying position, r=L/2, L: length of the long side in the cast slab. This steel material having making

3. 发明专利

JPS5611174A IMPROVING METHOD OF SOLIDIFIED STRUCTURE OF CASTING SURFACE 失效
公开(公告)号：JPS5611174A
公开(公告)日：1981-02-04
申请号：JP8659379
申请日：1979-07-09
申请人： NIPPON STEEL CORP
发明人： SAEKI TAKESHI , OOGUCHI SHIGERU , UEZAKI HIROKUNI , IWATA SUNAO
IPC分类号： B22D7/00 , B22D27/08
摘要： PURPOSE:To form dense solidified structure in the surface layer by applying predetermined high-frequency oscillations until molten metal is solidified to a predetermined thickness. CONSTITUTION:High-frequency oscillations of 5-50kHz are applied to solidifying metal until the finely grained solidified shell in its surface layer becomes 5-30mm. thick. For example, molten steel 1 of 0.15% C, 0.20% Si, 0.80% Mn, 0.020% P, 0.020% S, 0.020% Al and Fe for the remainder is put in a mold 2 of 100mm.X 1,200mm.X800mm. and is continuously cast at a 0.9m/min drawing speed. High-frequency oscillations of 18kHz frequency are applied to the mole 2 at 50kW output by a high-frequency oscillator 4 via a horn 5 and an oscillation transmitting plate 6. (5kW/faceX2 faces=10kW on the mold wall faces adjacent to the short side of 100mm. of the ingot, 20kW/faceX2 faces=4CkW on the long side of 120mm. side of the ingot, total 50kW). Thereby, the fine free crystal portions are obtained from the surface down to a depth of 15mm. and the solidified structure of the casting surfaces is improved.

4. 发明专利

JPS5611161A PRODUCTION OF SEMIKILLED STEEL AND RIMMED STEEL BY CONTINUOUS CASTING 失效
公开(公告)号：JPS5611161A
公开(公告)日：1981-02-04
申请号：JP8557979
申请日：1979-07-06
申请人： NIPPON STEEL CORP
发明人： SAEKI TAKESHI , OOGUCHI SHIGERU , UEZAKI HIROKUNI , IWATA SUNAO
IPC分类号： B22D11/00 , B22D11/053
摘要： PURPOSE:To obtain semikilled steel and rimmed steel free from any surface flaws occuring in blowhole by continuously casting the steel composed of the specific component composition of C, Si, Mn, etc. while imparting high-frequency oscillations of the specific frequencies thereto. CONSTITUTION:The steel composed of 0.005-0.3% C,

5. 发明专利

JPS6313650A CONTINUOUS CASTING FOR MOLTEN STEEL 失效
公开(公告)号：JPS6313650A
公开(公告)日：1988-01-20
申请号：JP15510986
申请日：1986-07-03
申请人： NIPPON STEEL CORP
发明人： KUDO KOICHI , UEZAKI HIROKUNI , KIMURA KATSUICHI
IPC分类号： B22D11/10 , B22D11/00 , B22D11/108 , B22D11/11 , B22D11/112 , B22D11/115 , B22D11/116 , B22D11/117
摘要： PURPOSE:To obtain high carbon steel wire rod having good internal quality by holding the specific molten steel temp. and next adding electromagnetic stirring in a mold and at a secondary cooling zone. CONSTITUTION:By executing stirring and melting as charging coolant into a tundish of continuous casting as an adjusting material for the molten steel temp., its temp. is held at the solidus + >10 deg.C - the liquidus + 20 deg.C. Next, the molten steel in the tundish is poured into the mold through a submerged nozzle and the electromagnetic stirring is executed to the molten steel in the mold and further the electromagnetic stirring is executed to the non-solidified molten steel at the secondary cooling zone, to cast. In this way, the high carbon steel wire rod having excellent quality is stably is stably produced.

6. 发明专利

JPS6313648A ADJUSTING METHOD FOR MOLTEN STEEL TEMPERATURE IN TUNDISH 失效
公开(公告)号：JPS6313648A
公开(公告)日：1988-01-20
申请号：JP15510886
申请日：1986-07-03
申请人： NIPPON STEEL CORP
发明人： KUDO KOICHI , KOMAGINE ROKURO , UEZAKI HIROKUNI
IPC分类号： B22D11/10 , B22D11/108 , B22D11/11 , B22D11/112 , B22D11/116 , B22D11/117 , B22D11/118
摘要： PURPOSE:To smoothly melt a cooling material and to make sure stable molten steel temp. by blowing inert gas at the specific quality into molten steel in a molten steel stirring room and charging the cooling material in the opened molten steel surface. CONSTITUTION:The molten steel in a ladle is poured through a long nozzle 5 and at the time of blowing the inert gas into the molten steel in the molten steel stirring room 2 through the long nozzle 5, the molten steel becomes easily to strong molten steel flow and shifting of heat to the cooling material is smoothly executed. The blowing quantity of inert gas is provided at >=0.5Nm /Hr. The slag layer 10 is formed on the molten steel surface in a tundish 1, but by charging the cooling material as aiming at the opened molten steel surface 11 formed by blowing the inert gas, the cooling material is not covered by the slag and the cooling material is rapidly melted.

7. 发明专利

JPS5564952A INJECTION METHOD OF MOLTEN STEEL INTO CONTINUOUS CASTING MOLD 失效
公开(公告)号：JPS5564952A
公开(公告)日：1980-05-16
申请号：JP13829778
申请日：1978-11-09
申请人： NIPPON STEEL CORP
发明人： UEZAKI HIROKUNI , KAKIZAKI MITSUO , KATOU HIROATSU , IWATA SUNAO
IPC分类号： B22D11/10 , B22D11/103
摘要： PURPOSE:To accelerate floating of inclusions in molten steel by disposing a baffle plate for the main flow of the effluent molten steel from the discharge orifice of an immersion nozzle toward the inside wall of the mold. CONSTITUTION:A baffle plate 6 is disposed in the intermediate position between the discharge port 2 of an immersion nozzle 1 and the inside wall of a mold 3. The molten steel main flow F flowed out from the discharge port 2 is powerful in flow and advances in its extension direction but it collides against the face of the baffle plate 6 and diverts to the upward flow F4 and downward flows F5, F6. The downward flows F5, F6 have already stalled owing to face collision and therefore they flow downward while being pushed by the subsequent flows, but the inner flow F5 begins to float slowly to the central direction in the mold 3. On the other hand, the outer flow F6 in question flows downward along the baffle plate 6 face and when there is no more face, it begins to flow slowly to the side direction of the mold 3. In this case, there is a suitable spacing between the baffle plate 6 and shell 5 and the flow F6 is not hampered and floating of the inclusions being carried is assisted by this.

8. 发明专利

JPH02145B2 失效
公开(公告)号：JPH02145B2
公开(公告)日：1990-01-05
申请号：JP15510886
申请日：1986-07-03
申请人： NIPPON STEEL CORP
发明人： KUDO KOICHI , KOMAGINE ROKURO , UEZAKI HIROKUNI
IPC分类号： B22D11/10 , B22D11/108 , B22D11/11 , B22D11/112 , B22D11/116 , B22D11/117 , B22D11/118

9. 发明专利

JPS6063305A METHOD FOR PRODUCING HIGH-PURITY PIG 失效
公开(公告)号：JPS6063305A
公开(公告)日：1985-04-11
申请号：JP17085683
申请日：1983-09-16
申请人： NIPPON STEEL CORP
发明人： UEZAKI HIROKUNI , FURUHASHI HISASHI , SASAKI SHINICHI , YONETANI HACHIROU
IPC分类号： C21C1/00 , C21C1/04
摘要： PURPOSE:To produce stably high-purity pig to be used as a raw material for a high-grade spheroidal graphite cast iron, etc. by oxidizing and removing Si and Mn in the molten pig in a preliminary treatment stage then adding an acid or the like and a flux thereto under mechanical stirring in succession to said oxidation and oxidation-refining elements such as P, S, etc. while suppressing decarburization. CONSTITUTION:Si, Mn, etc. in molten pig are oxidized and removed as a preliminary treatment by using a pan 2 to be used exclusively for said treatment of a KR-OB plant shown in the figure. O2 is charged from a lance 3 into the molten pig and a solid acid and flux (e.g.; >=1 kind among quicklime, CaCl2, etc.) are charged thereto from chutes 4,4 under stirring with an impeller in succession to the above-mentioned treatment and P, S and other elements which are liable to remove into basic slag are oxidation-refined while decarburization is suppressed. The high-purity pig contg., respectively by weight %, >4.0 T.C,

10. 发明专利

JPS5611134A SOLIDIFYING METHOD FOR METAL 失效
公开(公告)号：JPS5611134A
公开(公告)日：1981-02-04
申请号：JP8558279
申请日：1979-07-06
申请人： NIPPON STEEL CORP
发明人： SAEKI TAKESHI , OOGUCHI SHIGERU , UEZAKI HIROKUNI , IWATA SUNAO
IPC分类号： B22D27/08 , B22D11/114 , B22D27/20
摘要： PURPOSE:To manufacture a metal ingot having excellent cast surface in the solidification of molten metal, by giving oscillation of a specific high frequency to the metal so as to prevent the inclusion of air bubbles in the solidified metal. CONSTITUTION:In a continuous casting, 5-50kHz high frequency oscillation generated by a high frequency oscillator 4 is transferred through a horn 5 to the copper plate part 2 of a casting mold by means of an oscillation-transferring plate 6. As a result, the high frequency oscillation is transferred to the steel solidifying from the surface layer while the molten metal descends along the wall surface of the mold and is cooled by a water cooling box 3, hence air bubbles included in the surface layer of the molten steel are scattered and removed. Hereby no gas holes are formed in the surface layer of the ingot, consequently the extant of mending required after rolling is reduced. When the molten steel is solidified after poured into a mold, an ingot having an excellent cross sectional shape is obtained by giving high frequency oscillation to the molten steel to the course of the solidification, through the mold on a molding board.

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