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1. 发明专利

JPH01122644A NOZZLE FOR CASTING 失效
公开(公告)号：JPH01122644A
公开(公告)日：1989-05-15
申请号：JP27913287
申请日：1987-11-06
申请人： TOSHIBA CERAMICS CO , SUMITOMO METAL IND
发明人： KAWAI KAZUHIDE , MORI HIROYUKI , OOYA SATOSHI , SUGITA KIYONARI , KAWASAKI MORIO , KASAI NOBUFUMI
IPC分类号： B22D11/10 , B22D41/54
摘要： PURPOSE:To prevent clogging of a nozzle caused by precipitation and deposit of Al2O3 in molten steel by constituting the inner wall part of the nozzle for casting the molten steel with the specific composition of CaO-SiO2 series refractory material. CONSTITUTION:At the time of casting the molten aluminum killed steel by using the nozzle 1 for casting, the nozzle body 3 is made of Al2O3-C refractory material having high refractoriness, and the inner wall part 2 in the nozzle is constituted of the refractory material having CaO and SiO2 as main component and 0.18-1.86 CaO/SiO2 ratio and also containing Al2O3 of 10wt.% of the total contents of CaO and SiO2. In this case, even if Si is substituted for a part of SiO2, Si is oxidized to SiO2 and has the same effect as SiO2. The Al2O3 precipitated from the molten steel is reacted with the above CaO-SiO2 refractory material to form the compound having low melting point, and as it is flowed out from the nozzle, it is prevented that nozzle can not come to use caused by deposit and clogging Al2O3 in the inner wall part of the nozzle.

2. 发明专利

JPS63241110A PRODUCTION OF BLOCK FOR BUBBLING MOLTEN METAL 失效
公开(公告)号：JPS63241110A
公开(公告)日：1988-10-06
申请号：JP7571787
申请日：1987-03-27
申请人： SUMITOMO METAL IND , TOSHIBA CERAMICS CO
发明人： NAKAJIMA TAKAHARU , KAWASAKI MORIO , KASAI NOBUFUMI , SUGINO TAKAO , HIGASHIYAMA KOJI , YAMAMOTO HIDEHARU
IPC分类号： C21C7/072 , F27D3/16
摘要： PURPOSE:To easily produce the titled block having fine holes at fixed pitch by setting a cylindrical body placing an upper frame at the prescribed position of upper part in outer frame on bottom base, stretching fine wires between the upper frame and the bottom base at the prescribed pitch, filling up monolithic refractory between the outer frame and the bottom base and executing the heat treatment. CONSTITUTION:The outer frame 2 is positioned on the bottom base 1 and the cylindrical body 3 for forming accumulating chamber is held in the outer frame 2 at position having the prescribed interval from the bottom base 1 and the upper frame 4 is positioned on upper face of the cylindrical body 3. Next, the fine wires 5 (combustible material of cellulose, etc., having >=about 1mm diameter) are stretched between the upper frame 4 and the bottom base 1, at about 5-10mm pitch, and the monolithic refractory 6 is filled up between the outer frame 2 and the bottom base 1. Under this condition, it is heated by a drying furnace at about 300-600 deg.C for about 3-4hr and the fine wire 5 is burnt, to form fine holes 7 having

3. 发明专利

JPS6465069A DIPPED NOZZLE FOR CONTINUOUS CASTING 失效
公开(公告)号：JPS6465069A
公开(公告)日：1989-03-10
申请号：JP22069187
申请日：1987-09-03
申请人： SUMITOMO METAL IND , TOSHIBA CERAMICS CO
发明人： KASAI NOBUFUMI , KAWASAKI MORIO , KAWAI KAZUHIDE , MORI HIROYUKI , OOYA SATOSHI
IPC分类号： B22D11/10 , B22D41/54 , C04B35/48
摘要： PURPOSE:To prevent choking of internal holes of a dipped nozzle for continuous casting by constituting the nozzle of a specified compsn. consisting of a zirconia- graphite type refractory contg. SiO2, Al2O3, Y2O3, CaO, and MgO. CONSTITUTION:At least a working surface of internal holes of dipped nozzle is constituted of a refractory contg. 50-94wt.% ZrO2, 5-40% C, 1-10% SiO2,

4. 发明专利

JPS63256248A CONTINUOUS CASTING METHOD AND MOLTEN METAL SUPPLYING NOZZLE FOR CONTINUOUS CASTING 失效
公开(公告)号：JPS63256248A
公开(公告)日：1988-10-24
申请号：JP8928687
申请日：1987-04-10
申请人： SUMITOMO METAL IND , TOSHIBA CERAMICS CO
发明人： KASAI NOBUFUMI , KAWASAKI MORIO , HASHIO MORINORI , HIGASHIYAMA KOJI , KAWAMURA TOSHIO , SAKAI HIROSHI
IPC分类号： B22D11/10 , B22D41/50
摘要： PURPOSE:To speed-up casting by connecting a body of oblong shaped part having the prescribed inner sectional area with the specific tapered opening part, further prescribing discharging hole area larger than the body sectional area and impressing electromagnetic brake to molten metal flow. CONSTITUTION:The inner cross section in the nozzle body 1 is made to the oblong shape and also the part between the oblong shaped part and the opening part 2 is connected by taper in the range of 0.17-0.25 tapered degree. Then, the inner sectional area of the oblong shaped part is set in the range of 50-60% of the area of opening part 2, and the discharging hole 3 is formed downward and the area thereof is larger than the sectional area of the oblong shape part. Further, to the discharged molten steel flow, the electromagnetic brake is impressed. By this method, the molten steel flow speed in the nozzle 1 is quickened, but flow speed at outlet side from the discharging hole is reduced, and by action of the electromagnetic brake, the meniscus is stabilized. Therefore, clogging of the nozzle is eliminated and the high casting speed is attained.

5. 发明专利

JPS63242464A PRODUCTION OF LANCE FOR BUBBLING MOLTEN STEEL 失效
公开(公告)号：JPS63242464A
公开(公告)日：1988-10-07
申请号：JP7571887
申请日：1987-03-27
申请人： SUMITOMO METAL IND , TOSHIBA CERAMICS CO
发明人： KASAI NOBUFUMI , KAWASAKI MORIO , NAKAJIMA TAKAHARU , SUGINO TAKAO , HIGASHIYAMA KOJI , YAMAMOTO HIDEHARU
IPC分类号： B22D11/10 , B22D41/08 , B22D41/58
摘要： PURPOSE:To produce a block for bubbling molten steel having fine holes at uniform pitch and to use branching part as gate function by blocking monolithic refractory in outer frame of the body while giving vibration after winding gauze to the main piping part of gas flowing pipe body and drying. CONSTITUTION:A bottom plate is welded at end face of each cylindrical body of the block 10, 10 for bubbling molten metal and also each branching end part of T-shaped gas flowing pipe is penetrated and set to the bottom plate. After winding the gauze 13 to the main pipe part of the assembled gas flowing pipe body 12, the gas flowing pipe body 12 is positioned and held in the outer frame of the body, so that the end part of the block 10, 10 and the end part of the main pipe part are exposed, and set on a vibrating table. While giving the prescribed vibration, the monolithic refractory 14 is field in the outer frame of the body and dried. By this method, a lance for bubbling the molten metal providing the block for bubbling the molten metal having fine holes at uniform pitch and the branching part using as the gate function is easily obtd.

6. 发明专利

JPH02263546A SUBMERGED NOZZLE AND CONTINUOUS CASTING METHOD USING SAME 失效
公开(公告)号：JPH02263546A
公开(公告)日：1990-10-26
申请号：JP8599289
申请日：1989-04-04
申请人： SUMITOMO METAL IND
发明人： NAGAMICHI TOKIAKI , KAWASAKI MORIO
IPC分类号： B22D11/10 , B22D11/103 , B22D11/115
摘要： PURPOSE:To restrain uneven molten metal surface level in meniscus part and to prevent involution of molten powder caused by detaching by arranging a flange at lower end part of submerged nozzle submerged into the molten metal in a mold. CONSTITUTION:On the submerged nozzle 9, the flange 10 is arranged at the lower end part submerged into the molten metal 5 in the mold 4 and the molten metal is poured and stirred in the mold 4 under the condition of submerging the flange so as to be positioned at lower part than molten powder level above the meniscus. By this method, the molten metal surface levels near the submerged nozzle at the meniscus part and the mold 4 side are almost equalized by the effect of electromagnetic stirring, and the molten pool thickness of the powder comes to uniform and the powder thickness at the mold side is increased and also the involution of the powder caused by detached is reduced.

7. 发明专利

JPS6483351A MANUFACTURE OF LANCE FOR TANDISH BUBBLING 失效
公开(公告)号：JPS6483351A
公开(公告)日：1989-03-29
申请号：JP23816487
申请日：1987-09-22
申请人： SUMITOMO METAL IND
发明人： KASAI NOBUFUMI , KAWASAKI MORIO
IPC分类号： B22D11/10 , B22D11/11 , B22D11/112 , B22D11/116 , B22D11/117 , B28B23/00
摘要： PURPOSE:To omit the manufacturing process, to execute the mass production, and to reduce the cost by packing a part between an outer frame and a cover with a monolithic refractory and calculating it, and attaching as one body a pipe for supplying inert gas in which the outside periphery of a mandrel has been covered with a refractory, to a manufactured lance body. CONSTITUTION:A monolithic refractory 13 is cast into a bottom part of an outer frame 11, and on the refractory 13, an inflammable core 14 is placed. On the upper face of this outer frame 11, a cover 12 for forming hiving a through-hole 15' for providing porous nozzle and a through-hole 16' for installing mandrel is placed, and between the cover 12 and the core 14, a porous nozzle 15 is positioned and provided, and also, a mandrel 16 is installed so as to pass through the cover 12 from the upper face of the core 14. Subsequently, from an inflow port of the cover 12, a monolithic refractory 13' is cast in, and calcined in a furnace. In this case, the core 14 is burnt and a space which becomes an accumulator 17 is formed, and a lance body 19 is obtained. To this lance body 19, a pipe 21 for supplying inert gas whose outside periphery has been covered with a refractory 20 is attached.

8. 发明专利

JPS6240902A METHOD FOR PREVENTING CRACK IN DIRECT HOT ROLLING OF CONTINUOUSLY CAST STEEL INGOT 失效
公开(公告)号：JPS6240902A
公开(公告)日：1987-02-21
申请号：JP18144285
申请日：1985-08-19
申请人： SUMITOMO METAL IND
发明人： NAKAI TAKESHI , KAWASAKI MORIO , MAEHARA YASUHIRO , FUNAKI HIROYUKI , YOSHIHARA KAKUJI , MISHIMA TAKESHI
IPC分类号： C21D8/00 , B21B1/00 , B21B1/02 , B21B3/00 , B22D11/12
摘要： PURPOSE:To prevent the generation of a crack and to reduce the cost of the rolling material from the improved yield by controlling the surface temp. of a continuously cast steel ingot of a low alloy steel specified in the range of C equiv. within the specific width at the end of the ingot in the direct hot rolling of said steel ingot. CONSTITUTION:The continuously cast low alloy ingot of which the equiv. value [CP] expressed by formula I taking weight % of alloy elements Mn, Ni, Cu, N to sharply affect the peritectic point for generating the gamma phase in the solidifying stage of the molten metal into account is 0.13-0.23 and with which the crack is liable to arise during rolling by the coarsening of the gamma phase is delayed in cooling within the 50-200mm range from the ingot end by the influence of the molten steel discharge flow and is liable to have the coarsened gamma phase in the case of subjecting such steel ingot to the direct hot rolling. The temp. within 200mm from the ingot end is consequently heated by a heater to >=900 deg.C or cooled by water down to

9. 发明专利

JPS61162254A METHOD OF POURING TO MOLD FOR CONTINUOUS CASTING 失效
公开(公告)号：JPS61162254A
公开(公告)日：1986-07-22
申请号：JP307485
申请日：1985-01-11
申请人： SUMITOMO METAL IND
发明人： NAKAI TAKESHI , KAWASAKI MORIO , MARUKAWA YUJO
IPC分类号： B22D11/10 , B22D11/103 , B22D11/11
摘要： PURPOSE:To decrease effectively the coarse aggregation of the inclusion in a molten steel and to prevent the clogging of an immersion nozzle by the inclusion in the stage of pouring the molten steel by the immersion nozzle of a tundish into a continuous casting mold by adjusting the Reynolds number of the molten steel flowing in the immersion nozzle in a specific range. CONSTITUTION:An electromagnetic force generating means 6 such as linear motor or permanent magnet is provided to the outside of the immersion nozzle 2 to apply the brake to the molten steel flow in the nozzle 2 in the stage of pouring the molten steel 3 in the tundish 1 into the continuous casting mold 4 of the continuous casting device. The tundish 1 and the mold 4 are otherwise hermetically connected by the nozzle 2 to prevent the overflow of the molten steel 3 from the mold 4. The Reynolds number Re expressed by the equation representing the molten steel flow rate in the nozzle 2 is adjusted to a 10 -10 range by the above-mentioned method, by which the generation of vortexes in the molten steel flow is prevented. The clogging of the nozzle 2 as the result of the coarse aggregation of the nozzle 2 as the result of the coarse aggregation of the inclusions such as Al2O3 is thus prevented and the stable continuous casting operation is made possible.

10. 发明专利

JPS61150751A HEATED MOLD AND METHOD FOR HORIZONTAL AND CONTINUOUS CASTING OF METAL 失效
公开(公告)号：JPS61150751A
公开(公告)日：1986-07-09
申请号：JP27956284
申请日：1984-12-26
申请人： SUMITOMO METAL IND
发明人： KASAI NOBUFUMI , MARUKAWA YUJO , KAWASAKI MORIO
IPC分类号： B22D11/04 , B22D11/045 , B22D11/128
摘要： PURPOSE:To improve the surface of an ingot by embedding heating means to the top and bottom surfaces or bottom surface near the pouring aperture of a water-cooled mold for continuous casting by drawing in two horizontal directions and oscillating horizontally the mold thereby suppressing the formation of the ununiform solidified shell on the bottom surface of the aperture and controlling the forming position. CONSTITUTION:The low-frequency induction heaters 5 are embedded into the top and bottom surfaces near the pouring aperture 2 of the water-cooled 6 mold 1 for continuous casting by drawing in the two horizontal directions. The mold is oscillated back and forth in the horizontal drawing direction by an oscillator 7. The forming position of the solidified shell is controlled while the ununiform molten metal flow and stagnation near the aperture are prevented and the generation of the ununiform solidified shell is suppressed. Surface defects such as cold shut, double skin and surface crack are thus eliminated. The continuous casting while the bottom surface is cooled with water by consisting the top surface of the mold of a heat insulating material and disposing an endless water-cooled belt in the drawing direction of the mold 1 oscillated on the bottom surface is equally satisfactory.

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