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11. 发明专利

JPH04238651A DEVICE FOR CONTINUOUSLY CASTING METAL SHEET 失效
公开(公告)号：JPH04238651A
公开(公告)日：1992-08-26
申请号：JP252891
申请日：1991-01-14
申请人： NIPPON STEEL CORP
发明人： MIZUCHI ISAO , SUEHIRO TOSHIYUKI , TAKEUCHI HIDEMA
IPC分类号： B22D11/06
摘要： PURPOSE:To prevent the generation of surface cracks and uneven luster on a sheet product as well in the peripheral structure of a cooling drum in a synchronous continuous casting machine. CONSTITUTION:On the peripheral face of the cooling drum, recessed parts having 50-200mum depth are formed in 15-30% area ratio and the recessed parts having less than 10-50mum depth are formed in 40-60% area ratio. By the deeply recessed parts having low area ratio the surface crack on the product is prevented and by shallow recessed parts having high area ratio, the unevenness in luster on the surface is prevented.

12. 发明专利

JPH04158957A MANUFACTURE OF AUSTENITIC STAINLESS STEEL THIN SLAB AND SHEET HAVING EXCELLENT SURFACE QUALITY AND THIN SLAB 失效
公开(公告)号：JPH04158957A
公开(公告)日：1992-06-02
申请号：JP27909790
申请日：1990-10-19
申请人： NIPPON STEEL CORP
发明人： SUEHIRO TOSHIYUKI , UEDA MASANORI , MIZUCHI ISAO
IPC分类号： B22D11/00 , B22D11/06 , C21D8/02
摘要： PURPOSE:To prevent uneven glossiness of a sheet product developed caused by uneven solidified structure by controlling molten steel component to be cast to high delta-ferrite side and arranging dimples on cooling drum surface so as to be possible to uniformly and slowly cool the solidified shell at the initial stage. CONSTITUTION:In the manufacture of austenitic stainless steel thin slab, the austenitic stainless steel containing 5-9% delta-Fe cal defined in the equation 1 is cast into the cast strip having

13. 发明专利

JPH0466247A METHOD FOR CONTINUOUSLY CASTING CAST STRIP 失效
公开(公告)号：JPH0466247A
公开(公告)日：1992-03-02
申请号：JP17642290
申请日：1990-07-05
申请人： NIPPON STEEL CORP , MITSUBISHI HEAVY IND LTD
发明人： MIZUCHI ISAO , TANAKA SHIGENORI , SAKANASHI NOBUYASU , YAMANE TAKASHI
IPC分类号： B22D11/06
摘要： PURPOSE:To keep thickness of stuck material to the constant by continuously measuring the thickness of stuck material on the free outer peripheral face of cooling drums during casting and adjusting pressing pieces, number of revolutions and pressing force of rotating brushes in the order of priority at any time according to the obtd. measured value. CONSTITUTION:To the cooling drum 1, two pieces of the rotary brushes 11 for rough grinding and one piece of the rotary brush 12 for finish grinding are set in the order as shown in the figure on the free outer peripheral face, i.e., in the range of being shown with the arrow mark S on the outer peripheral face 4 in the cooling drum 1. Further, at the P position on the free outer peripheral face 4, the thickness of stuck material on the outer peripheral face 4 in the cooling drum 1 is continuously measured with an infrared ray image pickup device 13. The measured value is outputted as an electric signal and compared with the prescribed thickness of stuck material with a comparator, and according to the compared result, using condition of the rotary brushes 11 and 12, i.e., number of pressing pieces, number of revolutions and pressing force in order of priority, are set and adjusted with a control unit. By this method, traverse cracking is prevented and also a cast strip having the prescribed thickness can be stably cast.

14. 发明专利

JPH0342150A PRODUCTION OF CR-NI STAINLESS STEEL SHEET HAVING EXCELLENT SURFACE QUALITY 失效
公开(公告)号：JPH0342150A
公开(公告)日：1991-02-22
申请号：JP17568189
申请日：1989-07-10
申请人： NIPPON STEEL CORP
发明人： TERAOKA SHINICHI , UEDA MASANORI , MIZUCHI ISAO
IPC分类号： B22D11/06 , B21B3/02 , C21D9/46
摘要： PURPOSE:To form a finer-grained casting structure by adjusting the overheating degree at the time of casting according to the delta Fecal calculated from the component values of a molten steel prior to casting, then casting the molten steel. CONSTITUTION:The Cr-Ni stainless steel having =100 deg.C/sec cooling rate down to 1,200 deg.C and at >=10 deg.C/sec down to 1,200 to 550 deg.C, by which the gamma grain size of the ingot is fined to

15. 发明专利

JPH0299243A METHOD AND APPARATUS FOR CONTINUOUSLY CASTING CAST STRIP 失效
公开(公告)号：JPH0299243A
公开(公告)日：1990-04-11
申请号：JP25068588
申请日：1988-10-03
申请人： NIPPON STEEL CORP , MITSUBISHI HEAVY IND LTD
发明人： MIZUCHI ISAO , KASAMA AKIO , TANNO HITOSHI , SASAKI KUNIMASA , YAMAMOTO KEIICHI
IPC分类号： B22D11/06
摘要： PURPOSE:To always maintain peripheral surface of cooling drum to clean condi tion and to produce a cast strip having excellent quality by selectively brushing the peripheral surface part of the cooling drum sticking a large quantity of foreign materials. CONSTITUTION:Brushing rolls 11a, 11b are arranged on running carriages 13a, 13b through arms 12a, 12b. These running carriages 13a, 13b receive signal from optical detectors 14a, 14b for detecting sticking condition related to the axial direction of the foreign materials stuck to the peripheral surfaces of the cooling drums 1a, 1b to advance/retreat frames 15a, 15b to the axial direc tion of the cooling drums 1a, 1b. Then, the peripheral surface part of the cooling drum sticking much foreign materials is selectively sliding-scraped to execute removal of the foreign materials. In such a way, as the place having much foreign material stick quantity is concentratedly brushed, the removal of the foreign materials is efficiently executed. Then, as the other peripheral part is not brushed, the wear of the peripheral surfaces of the cooling drums 1a, 1b can be restrained.

16. 发明专利

JPH0191941A METHOD FOR CONTINUOUSLY CASTING METAL STRIP 失效
公开(公告)号：JPH0191941A
公开(公告)日：1989-04-11
申请号：JP25032087
申请日：1987-10-02
申请人： NIPPON STEEL CORP , MITSUBISHI HEAVY IND LTD
发明人： MIZUCHI ISAO , HAYASHIDA MICHIYA , YAMAMOTO KEIICHI
IPC分类号： B22D11/06
摘要： PURPOSE:To produce a product without any defects of longitudinal crack and inequal thickness by limiting over-heat degree at the time of pouring molten metal and specifying the thickness of a metal strip at the time of producing the metal strip by continuous casting with twin drum method. CONSTITUTION:Pouring basin part 3 is arranged at space between one pair of cooling drums 1a, 1b and solidified shells from the molten metal 4 supplied from there are formed and pressure-welded and integrated at the drum gap 6 part. Then, the over-heat degree at the time of pouring the molten metal is made to

17. 发明专利

JPS6483339A METHOD FOR CONTINUOUSLY CASTING STEEL STRIP 失效
公开(公告)号：JPS6483339A
公开(公告)日：1989-03-29
申请号：JP24047887
申请日：1987-09-24
申请人： NIPPON STEEL CORP
发明人： TANAKA SHIGENORI , KASAMA AKIO , MIZUCHI ISAO
IPC分类号： B22D11/06
摘要： PURPOSE:To continuously cast a steel strip having excellent quality at good efficiency by rapidly cooling and solidifying molten steel by cooling drums or belts and keeping the specific relation at between material quality of molten steel, temp., and casting velocity. CONSTITUTION:Pouring basin is formed at gap between one pair of cooling drums or belts. The molten steel is poured into the pouring basin from a vessel of tundish, etc., and rapidly cooled and solidified at the part contacting with the cooling drums. The solidified shells formed by this are integrated and drawn to obtain the steel strip. In the above continuous casting method for the steel strip, the relation between hydrogen content [H] (ppm) just before casting, the temp. T ( deg.C) of molten metal, and the casting velocity (v) (m/min) is kept to v

18. 发明专利

JPS63171250A CONTINUOUS CASTING METHOD FOR METAL STRIP 失效
公开(公告)号：JPS63171250A
公开(公告)日：1988-07-15
申请号：JP348287
申请日：1987-01-10
申请人： NIPPON STEEL CORP
发明人： ITO YUKIYOSHI , MIZUCHI ISAO
IPC分类号： B22D11/06
摘要： PURPOSE:To stably produce a metal strip having excellent surface characteristic and no internal defect by continuous casting, by applying coating material having carbide of the specific metal as effective composition on surfaces of cooling drums at the time of producing metal strip directly from molten metal by a twin drum method. CONSTITUTION:While rotating two pieces of water cooling type cooling drums 1a, 1b toward reversing direction, the molten metal 2 is poured between both drums and solidified shells 3 are formed by cooling through the drums 1a, 1b and at gap part 4 of both drums, they are joined and the metal strip 5 is directly and continuously cast. In this case, the coating material 6 dispersing fine power for the carbide of No.IV group-No.VI group metals, such as W, Ti, V, Nb, Zr, Cr, etc., as the effective composition in organic solvent is applied by spraying on the surfaces of drums from a nozzle 7. By developing a film 6a through the coating material 6, the solidification of molten metal at meniscus part 2a of the molten metal 2 at early time is prevented and gradually the solidified shell 3 is formed, to produce the continuously cast strip 5 without any defects, such as longitudinal crack, surface defect, etc.

19. 发明专利

JP2002210544A TWIN ROLL TYPE CASTING METHOD AND APPARATUS 审中-公开
公开(公告)号：JP2002210544A
公开(公告)日：2002-07-30
申请号：JP2001349144
申请日：2001-11-14
申请人： NIPPON STEEL CORP
发明人： ARAI TAKASHI , IZU TADAHIRO , ISAKI HIROSHI , MIYAZAKI MASAFUMI , MIZUCHI ISAO
IPC分类号： B22D11/06
摘要： PROBLEM TO BE SOLVED: To efficiently remove foreign matter stuck to dimples on a peripheral surface of a roll with brushing during casting in a twin roll type casting using the rolls formed with the dimples on the peripheral surfaces of the rolls. SOLUTION: Two brush rolls, namely, an upper roll 11a and a lower roll 11b are arranged contacted with the opposite side of the cooling roll 11a from a molten metal pool part 3. The upper brush roll 11a is rotated in the rotating direction following the rotation of the cooling roll to remove the upper side portion of the foreign matter stuck to the dimples. The lower brush roll 11b is rotated in the direction opposing the rotation of the cooling roll to remove the lower side portion of the foreign matter stuck to the dimples. Thus, the whole foreign matters stuck to the dimples are removed.

20. 发明专利

JPH09239497A FORMATION OF SURFACE RECESSED PARTS ON CASTING ROLL FOR ROLL TYPE CONTINUOUS CASTER AND DEVICE FOR FORMING SURFACE RECESSED PARTS THEREOF 失效
公开(公告)号：JPH09239497A
公开(公告)日：1997-09-16
申请号：JP4861696
申请日：1996-03-06
申请人： NIPPON STEEL CORP
发明人： SAITO TATSUKI , MIZUCHI ISAO , ARAI TAKASHI , MORIGUCHI SHIZUO
IPC分类号： B22D11/04 , B22D11/059 , B22D11/06
摘要： PROBLEM TO BE SOLVED: To produce a cast slab having stable quantity for long time by shot- blasting after heating the surface of a casting roll plated with Co-base alloy to a prescribed temp. SOLUTION: A heating device 1 enabling preheating of a roll surface range which jetting-supplies the shot-blast from a nozzle 2 by rotating the roll thereafter, is arranged in a roll type continuous caster having the Co-base alloy plating layer on the surface 4 contacting with molten metal. At the time of executing continuous casting by using this caster, the shot-blast is applied while rotating the roll to the (c) direction at the low casting speed and heating the surface heating range of the roll at 100 600 deg.C. By this method, the plating material excellent in the wear resistance of high hardness for the long time can be applied to the roll for the continuous caster. Further, the ruggedness having prescribed depth can be formed on the roll surface 4. Therefore, the cast slab having stable quality for a long time can be produced.

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