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1. 发明专利

JP2000160233A METHOD FOR DESULFURIZE-REFINING STAINLESS STEEL 失效
公开(公告)号：JP2000160233A
公开(公告)日：2000-06-13
申请号：JP33365798
申请日：1998-11-25
申请人： SUMITOMO METAL IND
发明人： MORISHIGE MITSUYUKI
IPC分类号： C21C7/00 , C21C7/06 , C21C7/064 , C21C7/10
摘要： PROBLEM TO BE SOLVED: To provide a refining method of a stainless steel, with which sulfur content can be reduced to =1.2 Nl/min/ton of molten steel from the bottom part of a ladle, the desulfurization and the deoxidation are executed and then, the extra-low sulfur stainless steel having

2. 发明专利

JPH03257114A REFINING METHOD FOR EXTRA-LOW CARBON STAINLESS STEEL 失效
公开(公告)号：JPH03257114A
公开(公告)日：1991-11-15
申请号：JP5741990
申请日：1990-03-08
申请人： SUMITOMO METAL IND
发明人： MORISHIGE MITSUYUKI
IPC分类号： C21C7/068
摘要： PURPOSE:To efficiently refine the extra-low carbon stainless steel by subjecting the stainless steel to rough decarburizing, reducing and slag removing in an AOD furnace, then charging quick lime to the stainless steel and subjecting the stainless steel again to decarburizing, then reducing the steel without charging the quicklime thereto and tapping the steel by omitting a finishing stage. CONSTITUTION:The stainless steel is subjected to the rough decarburizing, reducing and slag removing and thereafter the quicklime is charged to the stainless steel and the steel is subjected again to the decarburizing, by which the steel is decarburized down to an extra-low carbon region at the time of refining the stainless steel in the AOD furnace. The steel is thereafter reduced without charging the quick line and is tapped by omitting the finishing stage. The increase in the carbon content after the decarburization is suppressed in this way and the extra-low carbon stainless steel contg. the carbon as little as about

3. 发明专利

JPH08134528A PRODUCTION OF EXTRA LOW CARBON STEEL 失效
公开(公告)号：JPH08134528A
公开(公告)日：1996-05-28
申请号：JP29379094
申请日：1994-11-02
申请人： SUMITOMO METAL IND
发明人： MORISHIGE MITSUYUKI , TERAGUCHI AKITOSHI
IPC分类号： C21C7/068 , C21C7/072 , C21C7/10
摘要： PURPOSE: To suppress the increase of carbon content in reducing period after decarburizing, in a vacuum-refining method. CONSTITUTION: The extra low carbon steel obtd. with the decarburizing treatment by oxygen-blowing in a vacuum-refining furnace is succeedingly subjected to reducing, deoxidizing and desulfurizing reactions by adding ferro-silicon and/or metallic Al, and one or two kinds among lime, fluor spar and Al2 O3 as a slag making agent in the condition in which the flow rate of inert gas blown into the molten steel from a porous plug at the furnace bottom part under reduced pressure is made to be 0.3-4.0Nl/min/ton of the molten steel. By this method, the increase of carbon content in the molten steel in the reducing period after high vacuum-decarburizing is suppressed, and the extra low carbon steel can be smelted.

4. 发明专利

JPH05228507A BLOOMING METHOD FOR CONTINUOUS CAST BLOOM OF AUSTENITIC STAINLESS STEEL 失效
公开(公告)号：JPH05228507A
公开(公告)日：1993-09-07
申请号：JP7032392
申请日：1992-02-19
申请人： SUMITOMO METAL IND
发明人： KITAMURA YASUFUMI , NAKAYAMA KOJI , HITOMI YASUO , MORISHIGE MITSUYUKI
IPC分类号： B21B3/02 , C21D9/00 , C22C38/00
摘要： PURPOSE:To restrain cracks from being generated when a continuous cast bloom of austenitic stainless steel is hot-rolled. CONSTITUTION:Chemical components of austenitic stainless steel containing 16-18% Cr, 12-15% Ni, 2-5% Mo are displayed by wt.% and after it is melted so that Ni-bal decided by Ni-bal=30(C+N)+0.5Mn+Ni+8.2+1.1(1.5Si+Cr+Mo+0.5Nb) satisfies 0.01-5% (Ni-bal) and

5. 发明专利

JPH08143951A HEATING AND SLABBING METHOD FOR STAINLESS STEEL OR HIGH ALLOY STEEL MATERIAL 失效
公开(公告)号：JPH08143951A
公开(公告)日：1996-06-04
申请号：JP30825694
申请日：1994-11-16
申请人： SUMITOMO METAL IND
发明人： TERAGUCHI AKITOSHI , MORISHIGE MITSUYUKI , TERUNUMA MASAAKI
IPC分类号： C21D8/00 , C21D9/00 , C22C38/00 , C22C38/40 , C22C38/50
摘要： PURPOSE: To prevent the occurrence of melting crack due to supercooling and operation trouble due to low temp. heating by estimating the solidus temp. of a stainless steel or high alloy steel from its structure with high precision and performing heating and slabbing by the use of the estimated temp. CONSTITUTION: At the time of slabbing an ingot and a continuous cost slab of an Fe-Cr-Ni ternary system stainless steel or high alloy steel having a composition consisting of, by weight, one or >=2 kinds among

6. 发明专利

JPS6159367B2 失效
公开(公告)号：JPS6159367B2
公开(公告)日：1986-12-16
申请号：JP12145280
申请日：1980-09-01
申请人： SUMITOMO METAL IND
发明人： MASAME KAORU , TAGA MASAYUKI , ISHIHARA KAZUO , SAKANE TAKEYOSHI , MORISHIGE MITSUYUKI
IPC分类号： C21C7/00 , C21C7/10

7. 发明专利

JPH11100617A PRODUCTION OF COLD ROLLED FERRITIC STAINLESS STEEL SHEET 失效
公开(公告)号：JPH11100617A
公开(公告)日：1999-04-13
申请号：JP27816097
申请日：1997-09-24
申请人： SUMITOMO METAL IND
发明人： CHINJU TATSUO , MORISHIGE MITSUYUKI
IPC分类号： C21D8/02 , C21D9/46 , C22C38/00 , C22C38/28
摘要： PROBLEM TO BE SOLVED: To produce a cold rolled steel sheet excellent in ridging resistance by using a ferritic stainless steel represented by SUS430. SOLUTION: A ferritic stainless steel, having a composition which consists of, by weight, 16.00-18.00% Cr, 0.004-0.1% Ti,

8. 发明专利

JPH04293717A METHOD FOR SLABBING CONTINUOUSLY CAST SLAB OF AUSTENITIC STAINLESS STEEL 失效
公开(公告)号：JPH04293717A
公开(公告)日：1992-10-19
申请号：JP8186991
申请日：1991-03-20
申请人： SUMITOMO METAL IND
发明人： KITAMURA YASUFUMI , NAKAYAMA KOJI , HITOMI YASUO , MORISHIGE MITSUYUKI
IPC分类号： B21B3/02 , B22D11/00 , B22D11/12 , C21D8/00 , C22C38/00
摘要： PURPOSE:To provide a slabbing method capable of inhibiting the occurrence of cracks at the time of slabbing a continuously cast slab of austenitic stainless steel. CONSTITUTION:An austenitic stainless steel having a composition incorporating, by weight, 16-18% Cr, 11-15% Ni, and 2-5% Mo is refined so that (Ni-bal) determined by Ni-bal=30C+0.5Mn+Ni8.2 +1.1(1.5Si+Cr+Mo+0.5Nb) is regulated to 1.5 to -2.5 and also S

9. 发明专利

JPS58167714A METHOD OF REFINING IN ELECTRIC FURNACE 失效
公开(公告)号：JPS58167714A
公开(公告)日：1983-10-04
申请号：JP4928982
申请日：1982-03-26
申请人： SUMITOMO METAL IND
发明人： MORISHIGE MITSUYUKI , KOGA KAZUO , KOGUCHI TAKASHI
IPC分类号： C21C7/00 , C21C5/00 , C22C33/04
摘要： PURPOSE:To efficiently recover valuable elements, while contriving to save electric power unit product and to improve the speed of operation, in a Cr- contg. steel smelting process passing through the periods of melting, oxidizing and reducing, by injecting dry air into steel melt while interrupting arc heating at the reducing period. CONSTITUTION:In smelting stainless steel, CaO is charged together with a main raw material in an electric furnace and melted therein by applying an electric current to it. In succession, O2 gas is injected through a refining lance into a steel bath to perform rough decarburization. With this decarburizing reaction, valuable elements such as Cr and Mn are oxidized and transferred to slag. On the occasion of transferring to the next reducing period, Si and CaO are charged to accelerate initial reducing reaction. Thereafter, arc heating is temporarily interrupted (for about 10 min) at the reducing period, and dry air (of humidity below 0.1%) is injected through the refining lance into the steel bath. Consequently, slag-metal interfacial reaction is promoted to continue the reducing reaction. After about 50% slag is let flow outside, CaO is charged at an indispensable minimum ratio, The steel melt after passing through a finishing step is tapped.

10. 发明专利

JP2000204415A PREVENTION METHOD OF SURFACE OF STAINLESS STEEL SLAB FROM ROUGHENING AT THE HOT ROLLING 失效
公开(公告)号：JP2000204415A
公开(公告)日：2000-07-25
申请号：JP480399
申请日：1999-01-12
申请人： SUMITOMO METAL IND
发明人： MORISHIGE MITSUYUKI , UENISHI TORU , CHINJU TATSUO
IPC分类号： B21B3/02 , B21B45/00 , C21D8/02
摘要： PROBLEM TO BE SOLVED: To prevent the surface of a ferritic stainless steel slab from roughening due to the seizure between a roll and a slab at the time of hot-rolling. SOLUTION: The firritic stainless steel slab is hot-rolled in the conditions where the index (SI) of the thickness of scale satisfies the following expression in the heating temp. of the stainless steel slab as being the material to be rolled and the staying time in a heating furnace. Further, after extracting the slab from the heating furnace, the hot-rolling at >=900 deg.C finish temp. is executed. In this way, the scale having sufficient thickness is developed and the surface roughening caused by the seizure between the roll and the slab can be prevented. SI=317×t1×exp(-19521/T1+9.87)+371×t2×exp(-19521/T2+9.87)+3×t3×exp(-19521/T3+9.87)-939>=300. Wherein, t1: staying time in a preheating zone in the furnace (min), T1: the temp. in the preheating zone ( deg.C), t2: staying time in a heating zone in the furnace (min), T2: the temp. in the heating zone ( deg.C), t3: staying time in a soaking zone in the furnace (mm), and T3: the temperature in the soaking zone ( deg.C).

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