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1. 发明专利

JPH1110288A CONTINUOUSLY CAST THIN SLAB AND CASTING METHOD THEREFOR 失效
公开(公告)号：JPH1110288A
公开(公告)日：1999-01-19
申请号：JP16296897
申请日：1997-06-19
申请人： NIPPON STEEL CORP
发明人： ARAI TAKASHI , MIZUCHI ISAO , INOUE TAKESHI
IPC分类号： B22D11/06
摘要： PROBLEM TO BE SOLVED: To prevent the surface crack on a thin cast slab and the surface flaw caused by projecting transfer of recessed part arranged on roll peripheral surface in a twin roll type continuous casting, to simplify the forming process for the recessed parts and to extend the service life of the recessed parts. SOLUTION: In the method for continuously casting into the thin cast slab C by continuously supplying molten metal into a molten metal pool part 3 formed at the upper part of a gap between one pair of the cooling rolls 1, 1 rotating mutually in the reverse direction, on the peripheral surfaces of the cooling rolls l, 1, the recessed parts having 400-2000 μm diameter and 10-200 μm depth are formed at 30-70% area ratio. The ruggedness having 400-2000 μm diameter and 10-150 μm height is formed on the surface of the thin cast slab C by adjusting ratio of argon gas possessed in nitrogen gas in a seal chamber 4, and also, an angle formed between the inclining surface of the ruggedness and the surface of the thin cast slab is controlled to

2. 发明专利

JPH09262643A METHOD FOR CONTINUOUSLY CASTING THIN CAST STRIP 失效
公开(公告)号：JPH09262643A
公开(公告)日：1997-10-07
申请号：JP7426296
申请日：1996-03-28
申请人： NIPPON STEEL CORP
发明人： MIZUCHI ISAO , ARAI TAKASHI , KIRIHARA TADASHI
IPC分类号： B22D11/16 , B22D11/06
摘要： PROBLEM TO BE SOLVED: To provide the development of wearing of recessed parts and surface crack on a thin cast strip in a method for casting the thin cast strip by using a twin roll type continuous casting apparatus machining the recessed parts on the peripheral surface of the cooling roll. SOLUTION: On the peripheral surfaces of one pair of the cooling rolls 2, 3, plating is applied and many recessed parts are machined on this plated surface. Molten metal is supplied and solidified on the peripheral surfaces of one pair of the cooling rolls 2, 3 and solidified shells 12, 12 are continuously cast to the thin cast strip 13 while adding the pushing force of N/m of the width of roll at the steady time with the cooling rolls 2, 3 rotation-driving mutually to reverse direction. At this time, this pushing force is controlled so as to become N/m of the width of roll at the unsteady time.

3. 发明专利

JPH09103849A COOLING ROLL OF THIN SLAB CONTINUOUS CASTING MACHINE 失效
公开(公告)号：JPH09103849A
公开(公告)日：1997-04-22
申请号：JP26156195
申请日：1995-10-09
申请人： NIPPON STEEL CORP , MISHIMA KOSAN CO LTD
发明人： ARAI TAKASHI , KIRIHARA TADASHI , MIZUCHI ISAO , OKA HIDETAKA , SAITO TATSUKI , TATSUGUCHI TOKU
IPC分类号： B22D11/04 , B22D11/059 , B22D11/06
摘要： PROBLEM TO BE SOLVED: To extend life of a roll and to prevent generation of crack of a slab by efficiently arranging recessed parts of prescribed depth on the peripheral face of a cooling roll of a continuous casting machine to produce a thin slab and preventing deformation and wear of the recessed parts. SOLUTION: In a cooling roll 6 of a continuous casting machine to produce a thin slab, a Ni layer 9 and Co layer 10 of 10-500μm thickness are formed in sequence on the peripheral face of the cooling roll 6, a sum of thickness of the Ni layer 9 and Co layer 10 is 500μm-2mm, recessed parts (d) having 30-150μm average depth are formed on the surface of the Co layer 10.

4. 发明专利

JPH06297110A COOLING DRUM FOR CONTINUOUSLY CASTING CAST STRIP AND ITS MANUFACTURE 失效
公开(公告)号：JPH06297110A
公开(公告)日：1994-10-25
申请号：JP8879493
申请日：1993-04-15
申请人： NIPPON STEEL CORP , MITSUBISHI HEAVY IND LTD
发明人： TANAKA SHIGENORI , MIZUCHI ISAO , YAMAJI CHIHIRO , YAMAMOTO KEIICHI , WAKIYAMA YOICHI
IPC分类号： B22D11/06 , C23C14/06 , C23C14/14
摘要： PURPOSE:To improve the stickness of a plating layer and the service life index of a cooling drum by forming a specific size of dimples on the surface of the roll for continuous casting and arranging a hard plating layer having the specific thickness and hardness on the surface layer having the dimples. CONSTITUTION:On the surface of the cooling roll 1 for continuous casting, the dimples 5 having 0.1-0.8mm diameter and 5-50mum depth are formed, and on the surface of the dimples, a hard plating layer 4 having 1-50mum thickness and >=500Hv hardness is formed. Further, under this hard plating layer, an under layer of Ni plating layer 3 is formed. Then, the cooling drum is used in the gaseous nitrogen atmosphere. By this constitution, the service life index of the cooling drum is improved, and by using gaseous N2, nitride is formed in the hard plating layer and the wear resistance is improved, and the service life index is further improved.

5. 发明专利

JPH03210945A SAMPLER FOR OXIDE IN MOLTEN METAL 失效
公开(公告)号：JPH03210945A
公开(公告)日：1991-09-13
申请号：JP637290
申请日：1990-01-17
申请人： NIPPON STEEL CORP
发明人： MIZUCHI ISAO , TANAKA SHIGENORI
IPC分类号： B22D11/06 , B22D11/10 , B22D11/11 , B22D11/112 , B22D11/116 , B22D11/117 , B22D11/119
摘要： PURPOSE:To collect scum on molten metal remaining the composition under floating condition as it is by arranging a through hole on roof part in a cover- like member having holding member and making space in inner part of the cover-like member. CONSTITUTION:The cover-like member 1 in a sampler S1 is formed so as to constitute the space part 3 with an annular foot part 4 and the roof part 5 ad the hole part 6 is penetrated in the roof part 5. The holding part 2 is arranged to the roof part 5 in the cover-like member 1 under condition of fixing or as freely attachable/detachable. The sampler S1 covers the scum 8 floating on surface layer of the molten metal 7 under inert gas atmosphere and the foot part 4 in the sampler S1 is dipped into the molten metal 7 and held. Gas in the space part 3 is exhausted from the hole part 6, and the scum 8 and the molten steel 7 in contact with side inner face in the space part 3 are cooled and stuck to the inner face of space part 3. Then, this is taken up from the molten metal 7 to collect the scum 8, and the scum 8 is rapidly cooled and solidified under condition of being covered with the molten steel 7. Therefore, as the scum is taken out at room temp., oxidization is not progressed.

6. 发明专利

JPH02295643A METHOD FOR CONTINUOUSLY CASTING CAST STRIP 失效
公开(公告)号：JPH02295643A
公开(公告)日：1990-12-06
申请号：JP11579589
申请日：1989-05-08
申请人： NIPPON STEEL CORP , MITSUBISHI HEAVY IND LTD
发明人： MIZUCHI ISAO , TANAKA SHIGENORI , YAMAMOTO KEIICHI , SASAKI KUNIMASA
IPC分类号： B22D11/06 , B22D11/10 , B22D11/112 , B22D11/114 , B22D11/116
摘要： PURPOSE:To produce a cast strip having excellent surface characteristic without crossing fold by submerging absorbed vibrating body of porous refractory, heat resistant fiber, etc., extending to width direction of molten metal surface to absorb surface wave developed on the molten metal surface in pouring basin part at near a cooling drum. CONSTITUTION:A supporting bar 6 is set in parallel with drum axial direction near meniscus where the circumference of the cooling drum 1 comes into contact with the molten metal 4 in the pouring basin part 3, e.g. heat resistant fiber 7 is extended on the molten metal surface of the pouring basin part 3 from this bar 6. The molten metal 4 accompanies the circumferential face of the cooling drum 1 shifting in rotating direction D and becomes the flow in the circumferential face direction of the cooling drum 1 from center part. Therefore, the heat resistant fiber 7 fitted to the supporting bar 6 at the one end thereof is floated while directing to the circumferential face side of the cooling drum 1 and by dividing the surface wave developed on the molten metal surface, the wave is restrained to grow into large wave. Further, besides the above absorbing body used from the subject method, the vibrator may be used to suppress the surface wave.

7. 发明专利

JPS63242450A METHOD FOR CONTINUOUSLY CASTING METAL STRIP 失效
公开(公告)号：JPS63242450A
公开(公告)日：1988-10-07
申请号：JP7816187
申请日：1987-03-30
申请人： NIPPON STEEL CORP , MITSUBISHI HEAVY IND LTD
发明人： MIZUCHI ISAO , FUKUDA YOSHIMORI , YAMAMOTO KEIICHI , YAMANE TAKASHI
IPC分类号： B22D11/06
摘要： PURPOSE:To shorten the time from casting start to steady state and to improve the yield of a metal strip product by supplying shortage of molten metal in pouring basin part at the casting start by easy melting metal separately charged at the time of producing the metal strip directly from the molten metal by twin roll type continuous casting machine. CONSTITUTION:At the time of rotating two cooling rolls 1a, 1b mutually toward reverse direction and producing the metal strip by continuously drawing the metal strip from the molten metal poured in gap between the rolls, at first tip of a dummy bar 3 for drawing the continuously cast strip is inserted into the gap part 2 of both rolls 1a, 1b and the easy melting metal material 4 added elements, which lower melting point, such as C, Si, in the pouring basin part at upper part thereof. This metal material 4 is easily melted by holding heat of the molten metal as raw material successively poured and the pouring basin part is formed at short time and immediately the continuous casting operation can be started. By cut-removing unsound part containing a little of the easy melting metal contacting with the dummy bar 3, the metal strip can be produced under excellent yield of raw material.

8. 发明专利

JPH09141399A METHOD FOR CONTINUOUSLY CASTING THIN SHEET 失效
公开(公告)号：JPH09141399A
公开(公告)日：1997-06-03
申请号：JP32622395
申请日：1995-11-22
申请人： NIPPON STEEL CORP
发明人： MOROHOSHI TAKASHI , UEJIMA YOSHIYUKI , SHIO KIYOMI , YAMADA MAMORU , ARAI TAKASHI , KIRIHARA MASAFUMI , MIZUCHI ISAO , MIYAZAKI MASAFUMI , TANAKA SHIGENORI
IPC分类号： B22D11/00 , B22D11/04 , B22D11/059 , B22D11/06 , B22D11/22 , C25D3/12 , C25D7/00
摘要： PROBLEM TO BE SOLVED: To obtain a thin cast slab of carbon steel preventing the development of crack and having excellent surface characteristic by controlling an average heat flux within a specific inequility and casting the cast slab by twin roll type continuous casting apparatus. SOLUTION: The thin cast slab is continuously cast by the twin roll type continuous caster apparatus from molten carbon steel satisfying by weight, C /hr) ) and the casting is executed. In the inequility, D is the thickness of the cast slab (mm). The casting roll provided with the recessed and the grooves having 20-25μm depth on the surface is used.

9. 发明专利

JPH08290245A PRODUCTION OF STAINLESS STEEL THIN STRIP EXCELLENT IN SURFACE CONDITION 失效
公开(公告)号：JPH08290245A
公开(公告)日：1996-11-05
申请号：JP9391095
申请日：1995-04-19
申请人： NIPPON STEEL CORP
发明人： MIZUCHI ISAO , OIKAWA YUSUKE , ISOBE YOSHIO
IPC分类号： B22D11/10 , B22D11/04 , B22D11/06 , B22D11/106 , B22D11/12
摘要： PURPOSE: To prevent crack at casting and scale inclusion flaw at inline rolling in the production method in which a stainless steel thin cast strip is cast by twin roll continuous casting process and the thin cast slab is rolled to a thin strip with inline rolling. CONSTITUTION: In the production method, in which a thin cast slab 6 is cast with supplying molten metal to a molten metal pool 4 formed by a pair of cooling drums 2a, 2b, successively, the thin cast slab 6 is subjected to rolling at 5-60% draft by an inline rolling mill 9 to produce a thin strip 10, a recessed part having >=60μm average depth and

10. 发明专利

JPH04253552A CONTINUOUS CASTING MACHINE FOR THIN METALLIC STRIP 失效
公开(公告)号：JPH04253552A
公开(公告)日：1992-09-09
申请号：JP1318591
申请日：1991-02-04
申请人： NIPPON STEEL CORP , MITSUBISHI HEAVY IND LTD
发明人： KASAMA AKIO , TANAKA SHIGENORI , MIZUCHI ISAO , YAMAMOTO KEIICHI , YAMANE TAKASHI
IPC分类号： B22D11/06
摘要： PURPOSE:To execute stable continuous casting by preventing the reaction of the scum weirs to be immersed into the molten metal in a pouring basin with the molten metal in the continuous casting machine of a twin drum system. CONSTITUTION:A pair of the scum weirs formed with protective films, such as oxide films, on the wall surfaces facing at least cooling drums are disposed over the transverse direction of these cooling drums.

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