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1. 发明专利

JPH03210953A METHOD FOR CONTINUOUS CASTING AND MOLD FOR CONTINUOUS CASTING EQUIPMENT 失效
公开(公告)号：JPH03210953A
公开(公告)日：1991-09-13
申请号：JP386290
申请日：1990-01-11
申请人： SUMITOMO HEAVY INDUSTRIES , SUMITOMO METAL IND
发明人： MURAKAMI TOSHIHIKO , NAKAI TAKESHI , YAMADA TSUNEO , ABE KAZUO
IPC分类号： B22D11/04 , B22D11/05 , B22D11/16
摘要： PURPOSE:To uniformly execute cooling to a cast slab even in the case casting velocity varies by changing taper rate in one pair of the faced mold copper plates held between one pair of the faced set other mold copper plates at multiple steps in casting direction according to the casting velocity during casting. CONSTITUTION:The mold is assembled by holding one pair of the faced set short side copper plates 2 between one pair of the faced set long side copper plates 1, and at rear of short side frame 4 in the short side copper plate 2, U shaped notched groove 15 is arranged at center part in the casting direction, and at upper and lower parts of this groove 15, a screw type guide shaft 10 is arranged. In this constitution, the taper of short side copper plate 2 is made to the prescribed value and casting is started, and when the casting velocity comes to slow, the guide shaft 10 is worked with a driving device 16 through universal joint 17 and the copper plate 2 is bent with the groove 15 as supporting point and the inclination at the upper side part is made to large and inclination at the lower side is made to small. Further, when the casting velocity comes to fast, the bending degree is made to a little and the whole inclination is made to small to execute the casting, and control of the driving device 16 is executed with a controller 19 according to signal of thermocouple 18 imbedded at lower side part of the copper plate 2.

2. 发明专利

JPH0558042B2 失效
公开(公告)号：JPH0558042B2
公开(公告)日：1993-08-25
申请号：JP17552685
申请日：1985-08-09
申请人： SUMITOMO METAL IND
发明人： YOSHIHARA KAKUJI , MISHIMA TAKESHI , NAKAI TAKESHI , FUNAKI HIROYUKI
IPC分类号： B21B1/00 , B21B1/02 , C21D8/00

3. 发明专利

JPH04127948A METHOD FOR CONTINUOUSLY CASTING STEEL 失效
公开(公告)号：JPH04127948A
公开(公告)日：1992-04-28
申请号：JP24977190
申请日：1990-09-18
申请人： SUMITOMO METAL IND
发明人： KANAZAWA TAKASHI , NAKAI TAKESHI
IPC分类号： B22D11/07 , B22D11/10 , B22D11/108
摘要： PURPOSE:To prevent the development of trouble, such as breakout, in high velocity continuous casting for steel by prescribing consumption of powder added to a mold with the specific equation formulated with a casting velocity, m.p. and viscosity of the powder. CONSTITUTION:At the time of using Vc(m/sec) for the casting velocity of steel, Tm( deg.C) for the m.p. of powder and eta1300 (poise) for the viscosity of powder, the powder is added into the mold according to the casting velocity so that the powder consumption Q obtd. with the equation Q= K.Vc .(eta1300) .Tm (wherein, K: the fixed value decided with condition of oscillation of the mold) becomes >=0.3. Then, it is desirable that component composition of the powder is about 0.4-1.1 basicity and about 20-50wt.% SiO2 and about 10-40wt.% CaO as the essential component, and Tm is = about 0.05 poise. By this method, in the high velocity of >=3m/min casting velocity, a sound cast slab having no surface defect can be produced.

4. 发明专利

JPH03248764A METHOD FOR PREHEATING MOLTEN STEEL VESSEL 失效
公开(公告)号：JPH03248764A
公开(公告)日：1991-11-06
申请号：JP4233090
申请日：1990-02-22
申请人： SUMITOMO METAL IND
发明人： SHIRAI YOSHIHISA , KAJIWARA KOJI , NAKAI TAKESHI , KAWASAKI MORIO , MARUKAWA YUJO
IPC分类号： B22D11/10 , B22D41/015
摘要： PURPOSE:To obtain a good quality cast slab and to execute stable operation without clogging a nozzle by uniformly heating a molten steel vessel, in which the molten steel in not yet poured, while swinging a plasma torch. CONSTITUTION:Inner part of the molten steel vessel 1, in which the molten steel is not yet poured, is uniformly heated at>= 1400 deg.C while turning the plasma torch 2 before starting casting. In the case of executing the heating with the plasma, treatment for preventing secondary oxidation is unnecessary and further, as this can be heated to the high temp., even in the cast slab at the initial stage of casting, crack and inclusion are eliminated and the operational trouble, such as nozzle clogging, is not developed.

5. 发明专利

JPH03238151A METHOD FOR HEATING MOLTEN STEEL IN MOLTEN STEEL VESSEL 失效
公开(公告)号：JPH03238151A
公开(公告)日：1991-10-23
申请号：JP3345690
申请日：1990-02-14
申请人： SUMITOMO METAL IND
发明人： SHIRAI YOSHIHISA , KAJIWARA KOJI , NAKAI TAKESHI , KAWASAKI MORIO , MARUKAWA YUJO
IPC分类号： B22D11/10 , B22D41/01
摘要： PURPOSE:To enable uniform heating without needing a counter electrode by plasma-heating molten steel in a molten steel vessel with non-shiftable plasma torch built in cathode and anode using DC electric source. CONSTITUTION:The DC non-shifting type plasma torch 1 (having the anode and the cathode in the torch itself) is used as the plasma heating of the molten steel 21. By this method, as the counter electrode is unnecessary to arrange in the molten steel 21 in the molten steel vessel 2, problems of service life and setting of the counter electrode are eliminated. As the plasma arc is generated regardless of distance between the torch 1 and the molten steel surface 21, the distance between these can be optionally set. By this method, even in the case the molten steel surface level in the molten steel vessel varies, or the molten metal surface level rises at the initial stage of casting or lowers at the end stage thereof, a lifting device for torch is unnecessary and the molten steel can be uniformly heated.

6. 发明专利

JPH02169156A METHOD FOR CONTINUOUSLY CASTING STEEL 失效
公开(公告)号：JPH02169156A
公开(公告)日：1990-06-29
申请号：JP32254388
申请日：1988-12-21
申请人： SUMITOMO METAL IND
发明人： NAGAMICHI TOKIAKI , NAKAI TAKESHI
IPC分类号： B22D11/04 , B22D11/05 , B22D11/055 , B22D11/059 , B22D11/16
摘要： PURPOSE:To prevent the variation of molten steel surface and the development of surface flow by constituting side coming into contact with the molten steel in a mold of shape memory alloy, adjusting coolant flow rate, executing tapered control to the mold and casting while holding the molten steel shape near meniscus with electromagnetic force. CONSTITUTION:The whole or the side coming into contact with the molten steel 2 in the mold 1 for continuous casting is constituted of the shape memory alloy and deformed at temp. of lower than the Ms point to make taper to the mold downward. By changing the flow rate of the coolant 3, the tapered degree of the mold in according to the shape memorized to the shape memory alloy is changed. An electromagnetic holder 5 executes holding of the molten steel shape near the meniscus and restrain of variation of the molten steel surface, and holds gap between the mold 1 and solidified shell 4 to large, and molten powder 6A can be allowed to uniformly flow in. The variation of the molten steel surface, breakout and the surface flaw of a cast slab can be prevented without executing the mold change for all kinds of steel.

7. 发明专利

JPH0275446A METHOD FOR CONTINUOUSLY CASTING METAL ROUND INGOT AT HIGH VELOCITY 失效
公开(公告)号：JPH0275446A
公开(公告)日：1990-03-15
申请号：JP22544988
申请日：1988-09-08
申请人： SUMITOMO METAL IND
发明人： NAKAI TAKESHI , MURAKAMI TOSHIHIKO
IPC分类号： B22D11/04 , B22D11/041 , B22D11/049
摘要： PURPOSE:To prevent clogging of a submerged nozzle and to enable stable casting at high speed by arranging taper at upper part of a mold, specifying height of the taper and making the upper end part inner diameter of the taper the specific times of the lower end part inner diameter thereof. CONSTITUTION:The mold 2 having the taper at the upper part of inside shape, cylindrical shape at the lower part thereof and at least >=200mm height of the taper and making the upper end part inner diameter at least 1.2 times of the lower end part inner diameter, is used. Further, a round ingot is drawn so that solidified shell thickness at the neck part 6 of the mold becomes

8. 发明专利

JPH01202347A CONTINUOUS CASTING MACHINE FOR CAST STRIP 失效
公开(公告)号：JPH01202347A
公开(公告)日：1989-08-15
申请号：JP2732688
申请日：1988-02-08
申请人： SUMITOMO METAL IND
发明人： NAGAMICHI TOKIAKI , NAKAI TAKESHI , OKAZAKI TAKU
IPC分类号： B22D11/06
摘要： PURPOSE:To prevent surface cracking caused by eneven cooling at initial stage of casting and to form the product having good surface characteristic by forming plural pieces of longitudinal grooves at back side of metallic belt in continuous casting machine for cast strip to slowly cool the pouring metal. CONSTITUTION:At the back face side of the belt 2 near meniscus, plural pieces of the longitudinal grooves 9 are arranged to width direction of the belt 2. At the time of cooling by flowing a large quantity of cooling water at the back face side of the belt 2, quantities of conductive heat from thin part DA and thick part DB formed with the longitudinal grooves 9 are different. By this constitution, fine recessed parts are formed on the solidified shell surface at initial stage, and neighbor part of the meniscus is slowly cooled, and the surface cracking caused by uneven solidification at the initial stage of casting is prevented and the cast strip having good surface characteristic can be formed.

9. 发明专利

JPS6462255A METHOD FOR PREVENTING SURFACE LONGITUDINAL CRACK ON CONTINUOUSLY CAST SLAB 失效
公开(公告)号：JPS6462255A
公开(公告)日：1989-03-08
申请号：JP21974587
申请日：1987-09-02
申请人： SUMITOMO METAL IND
发明人： KANAZAWA TAKASHI , NAKAI TAKESHI
IPC分类号： B22D11/10 , B22D11/11 , B22D11/112 , B22D11/116
摘要： PURPOSE:To remove development of longitudinal crack on slab surface by heating molten steel between long side face of a mold and a submerged nozzle with heating means and controlling shape of slab bear. CONSTITUTION:In the case of producing the middle carbon steel slab containing 0.09-0.15wt.% carbon by continuously casting, the molten steel M between the submerged nozzle 1 and the long side face of the mold 2 is heated by a heater 5. The molten steel M at the part is heated and delay of development of solidified shell is prevented and the longitudinal crack can be prevented.

10. 发明专利

JPS649103B2 失效
公开(公告)号：JPS649103B2
公开(公告)日：1989-02-16
申请号：JP9628781
申请日：1981-06-22
申请人： SUMITOMO METAL IND
发明人： KODAMA HIROSHI , NAKAI TAKESHI
IPC分类号： B22D11/04 , B22D11/047

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