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1. 发明专利

JPH08120320A METHOD FOR SETTING CHARGING QUANTITY OF ALUMINUM IN SECONDARY REFINING 失效
公开(公告)号：JPH08120320A
公开(公告)日：1996-05-14
申请号：JP25522194
申请日：1994-10-20
申请人： NIPPON STEEL CORP
发明人： KUWAJIMA SHUJI , TSUCHIDA HIDENORI , IMOTO KOICHI , TOKUNAGA FUMINORI
IPC分类号： C21C7/04 , C21C7/06
摘要： PURPOSE: To improve the hitting accuracy of the total Al and to reduce the consumption of Al by reflecting the actual result of the Al adding yield in the previous process at each Al adding process, using the fine predicting function of the time and obtaining the Al adding quantity. CONSTITUTION: The Al is added to execute deoxidizing treatment and the secondary refining of the molten steel is executed. At this time, in the method for deciding the Al charging quantity, the actual result of the Al adding yield in the previous process is taken at each Al adding process, and the Al adding quantity is obtd. by predicting the treating time and the staying time at each process. The Al addition is suitably executed by a system based on this adding quantity.

2. 发明专利

JPH04172149A HORIZONTAL CONTINUOUS CASTING METHOD 失效
公开(公告)号：JPH04172149A
公开(公告)日：1992-06-19
申请号：JP29549790
申请日：1990-11-02
申请人： NIPPON STEEL CORP , KAWASAKI HEAVY IND LTD
发明人： TSUCHIDA HIDENORI , SUEOKA KAZUAKI , SEKINAGA TETSUO , YAMADA SHIGEHARU , KANEKO HIDEO
IPC分类号： B22D11/04 , B22D11/055
摘要： PURPOSE:To prevent the generation of casting defects by supplying warm water into a cooling water passage and a pressing a brake ring into the inlet of a mold in the condition of heating the mold. CONSTITUTION:One side of a tundish 11 and the mold 18 is made to be movable and the other side is fixed. By arranging the cooling water passage 19 in the mold 18, a horizontal continuous casting apparatus is formed. Then, the movable side is advanced, and the tundish 11 and the mold 18 are connected through nozzles 13, 15 and the brake ring 16, and the brake ring 16 is pressed into the inlet of mold 18 to start the casting. By supplying the warm water into the cooling water passage 19, the brake ring 16 is pressed into the inlet of mold 18 in the condition of heating the mold 18. By this method, deformation and breakage of the brake ring can be prevented.

3. 发明专利

JPH08157926A DECISION OF CARBON QUANTITY AT BLOWING OFF IN CONVERTER 失效
公开(公告)号：JPH08157926A
公开(公告)日：1996-06-18
申请号：JP30101094
申请日：1994-12-05
申请人： NIPPON STEEL CORP
发明人： KUWAJIMA SHUJI , TSUCHIDA HIDENORI
IPC分类号： C21C7/068 , C21C5/30
摘要： PURPOSE: To decide the blowing-off carbon quantity to be in the lowest cost in a converter and to obtain a low carbon steel at a low cost by executing operation considering the producing cost in a converter process and a degassing process based on the variation in the conditions of kind of treating steel, its history, etc., in the degassing process. CONSTITUTION: Beforehand, the producing cost of the degassing process which is obtd. from a degassing time and the producing cost of the converter process which is obtd. from the blowing-off carbon quantity in the converter and the blowing time of the converter obtd. from the blowing-off carbon, are obtd. Further, the effects of factors such as the order of cast in a continuous casting process and the kind of treating steel, its history, etc., in the degassing process having effect on the decarburizing speed exerting on the necessary degassing time are obtd. Successively, the relation between the blowing-off carbon quantity and the necessary degassing time and the relation between the blowing-off carbon quantity and the producing cost of the degassing process are obtd. from the target carbon quantity after degassing and the above values, and successively, the relation between the blowing-off carbon quantity and the producing cost of the converter process is obtd. The blowing-off carbon quantity by which the total cost of the degassing process and the converter process becomes lowest, is used as the target carbon quantity in the converter.

4. 发明专利

JPH04279265A CONTINUOUS CASTING METHOD 失效
公开(公告)号：JPH04279265A
公开(公告)日：1992-10-05
申请号：JP4385891
申请日：1991-03-08
申请人： NIPPON STEEL CORP
发明人： UCHIMURA MITSUO , OGIBAYASHI SHIGEAKI , MIHARA HIRONOBU , TSUCHIDA HIDENORI
IPC分类号： B22D11/20 , B22D11/128
摘要： PURPOSE:To prevent segregation of impurity elements shown at center part in thickness of a continuously cast slab, i.e., sulfur, phosphorus, manganese, etc., in the case of the cast steel and to obtain a uniform metal. CONSTITUTION:In the continuous casting method for molten metal drawing while executing rolling reduction to the cast slab with at least one pair of the rolls at end period of solidification, in the case equiaxed crystal ratio in upper face is

5. 发明专利

JPS61281805A METHOD FOR ANALYZING COMPOSITION OF MOLTEN STEEL WITH MOLTEN STEEL DUST 失效
公开(公告)号：JPS61281805A
公开(公告)日：1986-12-12
申请号：JP12390885
申请日：1985-06-07
申请人： NIPPON STEEL CORP
发明人： ARIYOSHI HARUKI , MORISHIGE HIROAKI , TSUCHIDA HIDENORI
IPC分类号： C21C5/46 , G01N33/20
摘要： PURPOSE:To properly change over the ratio of gaseous O2/Ar during refining under agitation by analyzing molten steel dust produced in a refining furnace during refining and by estimating the composition of molten steel from the established relation between the analyzed values of molten steel dust and the composition of molten steel. CONSTITUTION:A lance 2 for sampling is put in a refining furnace 1 from the top during refining under agitation, and dust generated in the furnace 1 is sampled by suction with a recuperator 3. Only molten steel dust is separated from the sampled dust by magnetic separation or other method, sent to an analyzer 4 and analyzed. The composition of molten steel is estimated from the established relation between the analyzed values of molten steel dust and the composition of molten steel.

6. 发明专利

JPH0584555A CONTINUOUS CASTING METHOD 失效
公开(公告)号：JPH0584555A
公开(公告)日：1993-04-06
申请号：JP27356091
申请日：1991-09-26
申请人： NIPPON STEEL CORP
发明人： UCHIMURA MITSUO , GOTODA HIDEAKI , YATABE HIROSHI , TSUCHIDA HIDENORI
IPC分类号： B22D11/128 , B22D11/20
摘要： PURPOSE:To provide a continuous casting method which can make blooming heating condition for blooming a cast bloom having good segregation condition, by separately selecting the deteriorated segregation cast bloom which is insufficient to segregation improving effect, in the light rolling reduction continuous casting method. CONSTITUTION:The deteriorated segregation cast bloom in the light rolling reduction is decided by the cast bloom thickness at the fixed position in the rolling reduction zone and separated to select the heating condition for blooming. The segregation which can improve by the heating condition for blooming, is beforehand clear and from the limited casting bloom thickness corresponding to this, the deteriorated segregation cast bloom and the good cast bloom are separated. The heating condition for blooming in the good segregation cast bloom is made to low temp. in short time. The consumed energy is a little and the iron yield is good and the wire rod having stable quality can be supplied.

7. 发明专利

JPH0238058B2 失效
公开(公告)号：JPH0238058B2
公开(公告)日：1990-08-28
申请号：JP19396186
申请日：1986-08-21
申请人： NIPPON STEEL CORP
发明人： YANAI TAKASHI , TSUCHIDA HIDENORI , ARYOSHI HARUKI
IPC分类号： B22D11/10 , B22D41/50

8. 发明专利

JPH0359779B2 失效
公开(公告)号：JPH0359779B2
公开(公告)日：1991-09-11
申请号：JP1577586
申请日：1986-01-29
申请人： NIPPON STEEL CORP
发明人： TAKEUCHI HIDEMA , MATSUMURA SHOGO , TSUCHIDA HIDENORI , OOISHI JUN
IPC分类号： B22D11/04 , B22D11/051 , B22D11/053 , B22D11/16

9. 发明专利

JPS6352756A SUBMERGED NOZZLE FOR CONTINUOUS CASTING 失效
公开(公告)号：JPS6352756A
公开(公告)日：1988-03-05
申请号：JP19396186
申请日：1986-08-21
申请人： NIPPON STEEL CORP
发明人： YANAI TAKASHI , TSUCHIDA HIDENORI , ARIYOSHI HARUKI
IPC分类号： B22D11/10 , B22D41/50
摘要： PURPOSE:To favorably bring the discharging flow of molten metal into contact with mold powder and to reduce the wave on the surface of molten metal by arranging the discharging hole at both side faces near the closed bottom part of submerged nozzle and constructing the discharging hole by the specific shape. CONSTITUTION:The discharging hole 7 for the molten metal is arranged at both side faces near the closing bottom part 4 of submerged nozzle 1 for continuous casting and the molten metal is poured into a mold 10 through a hole 7. The upper face 8 of this hole 7 is inclined to upward toward outer side and the lower face 9 is horizontally or inclined to upward toward outer side, and in case of using theta1 for angle of the upper face 8 to the horizontal direction and theta2 for angle of the lower face 9 to the horizontal direction, the discharging hole is provided under conditions that theta1 is larger than theta3 and height D at the outside is larger than height (d) at the inside for the hole 7. Further, hole area S0 at the outside is to provide to larger than hole area S1 at the inside fo. the discharging hole 7 and a widened angle theta3 in the hole 7 is provided. Further, in case of using (h) for depth from the molten surface in the mold 10 to the upper end of outside for the hole 7 and L for distance from the side face of the nozzle 1 to the side wall of mold 10, it is desirable to be theta1>tan . h/L > theta2. 3 : mold powder.

10. 发明专利

JPS62176656A CONTINUOUS CASTING METHOD BY SOLIDIFICATION UNDER MOLTEN METAL SURFACE WITHOUT SURFACE CRACKING OF BILLET 失效
公开(公告)号：JPS62176656A
公开(公告)日：1987-08-03
申请号：JP1577586
申请日：1986-01-29
申请人： NIPPON STEEL CORP
发明人： TAKEUCHI HIDEMA , MATSUMURA SHOGO , TSUCHIDA HIDENORI , OISHI JUN
IPC分类号： B22D11/04 , B22D11/051 , B22D11/053 , B22D11/16
摘要： PURPOSE:To improve quality of billet surface by executing reciprocating motion with closely resemblong sine curve in casting direction for integrated type combination mold, making a max. descendent speed of the mold faster than casting speed of the casting billet and making a return-back length, etc. a speci fied value. CONSTITUTION:The integrated type combination mold, which arranges an inter mediate vessel 2 above a water cooling mold 1, and a heat insulating ring 3 at the boundary of the both, executes reciprocating motion with closely resem bling sine curve in the casting direction, and the max. descendent speed of the mold is faster than the casting speed of the casting billet. Further, the casting is executed under condition of which a negative strip time (tN) and the return-back length (lr) satisfy the inequality. In this way, the casting billet having good surface quality is obtd.

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