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1. 发明专利

JPH07284837A DESCALING METHOD OF WIRE MADE OF AUSTENITIC STAINLESS STEEL 失效
公开(公告)号：JPH07284837A
公开(公告)日：1995-10-31
申请号：JP7617594
申请日：1994-04-14
申请人： NIPPON STEEL CORP
发明人： HAYASHI TERUHIKO , NAKADA SHIOO , MIZUTA YOSHIO , SADANO YUTAKA
IPC分类号： B21B45/04 , C23G1/08
摘要： PURPOSE:To provide a descaling method of the wire made of austenitic stainless steel where the molten alkaline treatment or the complicated pickling treatment can be dispensed with, the cost is low, and the wire surface excellent in the wire drawability is obtained. CONSTITUTION:In a descaling method of the wire made of austenitic stainless steel, the scale of >=25% to =30kg/m in the projection density, and the wire is recoiled, and the rest of the scale is successively removed by pickling the coil in the nitric-hydrofluoric acid solution containing the nitric acid of 150-200g/l and the hydrofluoric acid of 50-100g/l.

2. 发明专利

JPH07278760A FERRITIC STAINLESS STEEL FOR BUILDING MATERIAL 失效
公开(公告)号：JPH07278760A
公开(公告)日：1995-10-24
申请号：JP7619694
申请日：1994-04-14
申请人： NIPPON STEEL CORP
发明人： NAKADA SHIOO , ONO NAOTO
IPC分类号： C22C38/00 , C22C38/50
摘要： PURPOSE:To produce a ferritic stainless steel for building material, having softness (hardness characteristic) and excellent in ductility (elongation characteris tic) as well as in rust resistance. CONSTITUTION:This steel is a ferritic stainless steel for building material, heaving a composition which consists of, by weight, 0.005-0.020% C, 0.1-1.0% Si, 0.1-1.0% Mn, 0.001-0.010% S, 21.5-31.0% Cr, 0.3-4.0% Mo, 0.005-0.020% N, 0.10-0.20% Ti, 0.15-0.25% Nb, and the balance Fe with inevitable impurities and further contains, if necessary, 0.005-0.050% Ce and in which the values of PI and HI in equation PI=Cr+1.7Mo, HI=Cr+2.4Mo are regulated to >=28 and

3. 发明专利

JPH06279953A HIGH RUST RESISTANT FERRITIC STAINLESS STEEL 失效
公开(公告)号：JPH06279953A
公开(公告)日：1994-10-04
申请号：JP7055193
申请日：1993-03-29
申请人： NIPPON STEEL CORP
发明人： NAKADA SHIOO , ONO NAOTO , TAKAIRA AKIFUMI , WAKASONE HAJIME
IPC分类号： C22C38/00 , C22C38/28
摘要： PURPOSE:To provide soft ferritic stainless steel having rust resistance superior to SUS316 and showing excellent rust resistance in the highly corrosive circumstance, such as in the rear of eaves. CONSTITUTION:This ferritic stainless steel is one having a compsn. contg., by weight, =12.5 for increasing its rust resistance. It is suitable for building materials requiring inexpensive and soft ferritic stainless steel having rust resistance superior to SUS 316.

4. 发明专利

JPS62280354A METHOD FOR ANNEALING TITANIUM AND TITANIUM ALLOY 失效
公开(公告)号：JPS62280354A
公开(公告)日：1987-12-05
申请号：JP12245886
申请日：1986-05-28
申请人： NIPPON STEEL CORP
发明人： YOSHIMURA HIROBUMI , NAKADA SHIOO , KIMURA KINICHI , HAYASHI MASAYUKI , NAITO HIROMITSU
IPC分类号： C22F1/18 , C22F1/00
摘要： PURPOSE:To produce a product having no temper color and satisfactory mechanical properties in a short time by subjecting Ti or a Ti alloy cold worked at a specified working rate to recrystallization annealing at a specified temp. in a specified atmosphere. CONSTITUTION:Ti cold worked at >=50% cold working rate or a Ti alloy cold worked at >=5% cold working rate is subjected to recrystallization annealing at 700-820 deg.C annealing temp. in an atmosphere having

5. 发明专利

JP2000273586A STAINLESS EXTRA-THIN FOIL 失效
公开(公告)号：JP2000273586A
公开(公告)日：2000-10-03
申请号：JP7714699
申请日：1999-03-23
申请人： NIPPON STEEL CORP
发明人： MUTO IZUMI , NAKADA SHIOO , FUJII YOSHIHIRO , HIRASHIMA KENJI , NAGASAKI SHUJI , NAKATSUKA ATSUSHI , NAKANO TAKESHI
IPC分类号： C22C38/00 , C21D8/02 , C22C38/04 , C22C38/40 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/50 , H05K3/44
摘要： PROBLEM TO BE SOLVED: To obtain stainless steel in which voids and cracks are hard to be generated at the time of etching treatment, and voids sometimes accompanied by cracks are hard to be generated from the edge faces to the rolling direction, as to stainless foil having a thickness equal to or below the specified one, by controlling the average number of inclusions of the maximum diameter equal or above the specified one equal to or below the specified one per cross-sectional unit area in the rolling direction. SOLUTION: As to stainless foil having =5 μm maximum diameter is controlled to =5 μm maximum diameter is >=0.3 mm, preferably, it contains, by weight, 5.0 to 30% Ni, S as impurity of

6. 发明专利

JPH06306699A METHOD FOR ELECTROPOLISHING STAINLESS STEEL 失效
公开(公告)号：JPH06306699A
公开(公告)日：1994-11-01
申请号：JP9755293
申请日：1993-04-23
申请人： NIPPON STEEL CORP
发明人： NAKADA SHIOO
IPC分类号： C25F3/24
摘要： PURPOSE:To provide a method for electropolishing stainless steel, by which the electropolishing having high smoothing capacity can be performed at a low cost and on an industrial scale. CONSTITUTION:The method for electropolishing stainless steel is performed by the electrolysis which uses a liquid mixture of hydrochloric acid and glycerol as the electrolyte and the stainless steel as the anode. This method features that desirably, the electrolyte contains 30 to 200g hydrochloric acid and 600 to 1000g glycerol per liter of the electrolyte and the electrolytic current density is 0.1 to 0.5A/cm and also the quantity of electricity is >=10 coulomb. This method is appropriately used for fields such as those, in which heretofore electrolytic methods requiring the use of expensive and/or harmful substances are unavoidably adopted and those, in which heretofore any electropolishing is not applicable on the industrial scale.

7. 发明专利

JPH04327313A DESCALING METHOD FOR STAINLESS STEEL 失效
公开(公告)号：JPH04327313A
公开(公告)日：1992-11-16
申请号：JP9929791
申请日：1991-04-30
申请人： NIPPON STEEL CORP
发明人： SAIDA SEISHIRO , TANAGA TAKESHI , KUNIOKA SHINYA , NAKADA SHIOO
IPC分类号： B21B45/06 , C25F1/06
摘要： PURPOSE:To offer the treatment method which can descale stainless steel by a safe work, a simple and compact equipment, and an inexpensive treatment cost. CONSTITUTION:A stock to be treated is, first of all, subjected to electrolytic treatment by using the stock to be treated as the anode in a neutral salt electrolyte whose main component is nitrate, a chrome oxide being a difficult soluble component in scale is eluted into the electrolyte, and also, an iron oxide is eliminated, and moreover, a passive state film is formed. Subsequently, before the electrolyte adhering to the surface of the stock to be treated and iron hydroxide being a precipitate in the electrolyte get dry, the surface of the stock to be treated is washed, while rubbing it with a washing roll, and the adhering electrolyte and the precipitate in the electrolyte are eliminated.

8. 发明专利

JPH0472021A CONTINUOUS BRIGHT ANNEALING METHOD FOR STAINLESS STEEL STRIP 失效
公开(公告)号：JPH0472021A
公开(公告)日：1992-03-06
申请号：JP18257390
申请日：1990-07-12
申请人： NIPPON STEEL CORP
发明人： TANAGA TAKESHI , MIURA EIJI , NAKADA SHIOO
IPC分类号： C21D1/26 , C21D1/74 , C21D9/56
摘要： PURPOSE:To reduce the development of spotting contamination on surface of a steel strip after annealing by arranging flowing passage of atmospheric gas at out of a furnace for again supplying the atmospheric gas once sucked to out of the furnace from heating zone or cooling zone into an introducing part of the furnace in the continuous bright annealing for stainless steel strip. CONSTITUTION:By again supplying the atmosphere gas into the introducing part 1 of furnace after once sucking the atmospheric gas to out of the furnace from the heating zone 2 or the cooling zone 3 by using booster 10 for atmospheric gas, the flowing direction 8 of atmospheric gas at inlet part of the heating zone 2 is made to the same direction as advancing direction 9 of the stainless steel strip 7 to be annealed to execute the continuous bright annealing to the stainless steel strip 7. By this method, the flowing direction 8 of atmospheric gas at the inlet part of heating zone 2 can be made to the same direction as the advancing direction 9 of stainless steel strip 7 to be annealed. Therefore, sticking of while powder developed in the heating zone 2 onto the surface of low temp. steel strip 7 before annealing at the introducing part 1 of furnace by being directly carried to the direction of introducing part 1 in the furnace, can be prevented.

9. 发明专利

JPH0472020A CONTINUOUS BRIGHT ANNEALING METHOD FOR STAINLESS STEEL STRIP 失效
公开(公告)号：JPH0472020A
公开(公告)日：1992-03-06
申请号：JP18257290
申请日：1990-07-12
申请人： NIPPON STEEL CORP
发明人： TANAGA TAKESHI , IKEGAMI OSAMU , NAKADA SHIOO
IPC分类号： C21D1/26 , C21D1/74 , C21D9/56
摘要： PURPOSE:To reduce the development of spotting contamination on surface of a steel strip after annealing by supplying atmospheric gas having quantity more than atmospheric gas quantity discharged from seal part at an inlet of a furnace into an introducing part of the furnace and making flowing direction of the atmospheric gas at an inlet part of heating zone the same direction as advancing direction of the stainless steel strip for annealing in the continuous bright annealing for stainless steel strip. CONSTITUTION:The stainless steel strip 7 comes in the furnace from the seal part 5 at the inlet of furnace and passes upward in the introducing part 1 of furnace, and the advancing direction is turned downward with a top roll 4 at the uppermost part and then, this comes in the heating zone 2. After soaking by heating the stainless steel strip 7 in the heating zone 2 at the prescribed temp., this is cooled to the temp. near room temp. in cooling zone 3, passed through seal part 6 at outlet of the furnace and carried out of the furnace. Then, the quantity supplied and the quantity discharged of atmospheric gas are adjusted so that relation of the quantity discharged V5 of atmospheric gas from the seal part 5 at the inlet of furnace to the quantity supplied V1 of atmospheric gas into the introducing part 1 of furnace becomes V1>V5. By this method, invasion of white powder developed in the heating zone 2 can be prevented and the spot contamination developed by locally oxidizing the steel strip 7 is reduced.

10. 发明专利

JPH03277744A FERRITIC STAINLESS STEEL EXCELLENT IN TOUGHNESS AND CORROSION RESISTANCE AFTER BRAZING 失效
公开(公告)号：JPH03277744A
公开(公告)日：1991-12-09
申请号：JP7683390
申请日：1990-03-28
申请人： NIPPON STEEL CORP
发明人： MINAMINO SHIGERU , NAKADA SHIOO , HAYASHI TERUHIKO
IPC分类号： C22C38/00 , C22C38/40
摘要： PURPOSE:To improve the toughness and corrosion resistance of a stainless steel by specifying the content of C, Si, Mn, Ni, Cr, Al and N, furthermore regulating its components so as to satisfy a specified formula and precipitating an austenitic phase at a brazing temp. CONSTITUTION:This ferritic stainless steel is a one contg., by weight, >0.04 to 0.09% C,

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