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1. 发明专利

JP2001348652A NONORIENTED SILICON STEEL SHEET AND ITS PRODUCTION METHOD 失效
公开(公告)号：JP2001348652A
公开(公告)日：2001-12-18
申请号：JP2000170087
申请日：2000-06-07
申请人： NIPPON KOKAN KK
发明人： YAMATO MASAYUKI , SATO KAORU , CHINO ATSUSHI , ONO YOSHIHIKO , HIURA AKIRA
IPC分类号： C21C7/00 , C22C38/00 , C22C38/16 , H01F1/16
摘要： PROBLEM TO BE SOLVED: To produce an inexensive silicon steel sheet having a characteristic of being small in core loss, and to provide its production method. SOLUTION: This nonoriented silicon steel sheet has a composition containing, by weight, =50% to the weight of all inclusions.

2. 发明专利

JP2000338039A METHOD AND APPARATUS FOR ANALYZING MOLTEN METAL 失效
公开(公告)号：JP2000338039A
公开(公告)日：2000-12-08
申请号：JP2000085350
申请日：2000-03-24
申请人： NIPPON KOKAN KK
发明人： SUGIMOTO KAZUMASA , ISHIDA TOMOHARU , AKIYOSHI TAKANORI , CHINO ATSUSHI , WASHIMI FUMIHIRO , KAWABATA RYO
IPC分类号： G01N21/31 , G01N21/39
摘要： PROBLEM TO BE SOLVED: To magnify a measuring concn. range by adjusting the wavelength of laser beam at a position shifted from the center position of the absorption wavelength of an element to be analyzed by a specific value. SOLUTION: Laser beam of which the wavelength is adjusted to a position shifted from the center position of the absorption wavelength of an element to be analyzed by 0.001-0.03 mm is used and guided to the vicinity of the surface of a molten metal to be passed through a molten metal vapor layer to measure the change in the intensity of laser beam caused by the passage. A relational expression of the change quantity of intensity and the concn. of a component element in a metal is preliminarily calculated and the concn. of the element to be analyzed is calculated from the measured change quantity of intensity by using the relational expression. Herein, the absorption spectrum by the element to be analyzed has width with respect to the wavelength of light because the temp. or the like of an absorbing substance thereof exerts effect. That is, the change of intensity by absorption is max. in the center wavelength of absorption and reduces along with shift quantity at a wavelength position shifted from a center wavelength.

3. 发明专利

JP2000160293A ELECTRIC RESISTANCE WELDED TUBE EXCELLENT IN GROOVING CORROSION RESISTANCE 失效
公开(公告)号：JP2000160293A
公开(公告)日：2000-06-13
申请号：JP33523698
申请日：1998-11-26
申请人： NIPPON KOKAN KK
发明人： YAMADA KATSUMI , CHINO ATSUSHI , SATO KAORU , ISHIGURO YASUHIDE , SHOMURA KATSUMI
IPC分类号： C22C38/00
摘要： PROBLEM TO BE SOLVED: To prevent the occurrence of grooving corrosion with certainty without performing particular heat treatment by incorporating specific amounts of one or more elements among S, Mg, Ca, Sr, and Ba into a steel composition. SOLUTION: One or >=2 elements selected from a group consisting of, by weight,

4. 发明专利

JP2000009719A QUANTITATIVE METHOD CLASSIFIED BY FORM AND QUANTITATIVE DEVICE CLASSIFIED BY FORM OF CARBON CONTAINED IN STEEL 失效
公开(公告)号：JP2000009719A
公开(公告)日：2000-01-14
申请号：JP18815998
申请日：1998-06-18
申请人： NIPPON KOKAN KK
发明人： MURAYAMA HISASHI , CHINO ATSUSHI
IPC分类号： G01N31/00 , G01N31/12 , G01N33/20
摘要： PROBLEM TO BE SOLVED: To provide a quantitative method classified by form and a quantitative device classified by form for carbons contained in steel. SOLUTION: This quantitative method is a method for measuring the amount of carbons classified by form in a steel to be analyzed by measuring the quantity of carbon monooxide and carbon dioxide produced by heating an extraction residue of the steel to be analyzed in the presence of oxygen. This method comprises the steps of heating started from a lower temperature than the lowest burning initiation temperature of carbons in each form, (1) raising the heating temperature is raised for the start of production of carbon monoxide or carbon dioxide, (2) keeping temperature constant during the period from the start until the end of the production, and measuring the total quantity of carbon monoxide and/or carbon dioxide produced during the period, (3) a step for raising the temperature again at least once after the end of the production. This quantitative device has a means 10, which is capable of controlling the heating temperature of the extracted residue corresponding to a detection signal from a detection means 9 of the initiation and the end of the production of carbon monoxide or carbon dioxide.

5. 发明专利

JPH1136047A COLD ROLLED STEEL SHEET FOR CAN 失效
公开(公告)号：JPH1136047A
公开(公告)日：1999-02-09
申请号：JP20843197
申请日：1997-07-18
申请人： NIPPON KOKAN KK
发明人： ONO TAKATOSHI , CHINO ATSUSHI , MORI KENTARO , KUBOTA ATSUSHI , MATSUNO EIJU , SHIMIZU HIROSHI , MURAI TAKESHI , TANIGAWA KATSUMI
IPC分类号： C22C38/00 , C22C38/06
摘要： PROBLEM TO BE SOLVED: To provide a cold rolled steel sheet for cans giving a reduced number of defective cans caused by oxide inclusions even under severe working conditions. SOLUTION: The cold rolled steel sheet for cans is manufactured by successively subjecting a continuously cast slab to hot rolling, to acid pickling, to cold rolling, to continuous annealing, and to temper rolling or to secondary rolling (DR rolling) and then applying surface treatment to the resultant cold rolled steel sheet. In this case, when an arbitrary cross section parallel to the rolling surface of the cold rolled steel sheet is used as an inspection surface, the ratio of existence of a group of inclusions in a state of a dotted line (where three or more pieces among the oxide inclusions are aligned in a straight line, at a distance of pieces/m for each arbitrary inspection surface.

6. 发明专利

JPH06148170A ANALYZING METHOD FOR TRACE OXYGEN OF IRON AND STEEL 失效
公开(公告)号：JPH06148170A
公开(公告)日：1994-05-27
申请号：JP30370592
申请日：1992-11-13
申请人： NIPPON KOKAN KK
发明人： NAGATA MASATSUGU , CHINO ATSUSHI , SUGIMOTO KAZUMASA , YOSHIKAWA HIROYASU , FUNABIKI YOSHIHIRO
IPC分类号： G01N31/00 , G01N33/20
摘要： PURPOSE:To provide a method capable of perfectly removing the oxide adhered to a sample surface even in the state where the surface oxidation at sample preparation by a grinder or file is present, precisely measuring the extremely trace oxygen quantity in iron and steel and also analyzing it in a short time. CONSTITUTION:In an analyzing method of trace oxygen in iron and steel which comprises heating, extracting and measuring the trace oxygen in an iron steel sample after grinding its surface by a grinder or file, the sample after grinding treatment is put in a carbon crucible and preliminarily heated at a temperature of 900 deg.C or more and less than 1400 deg.C.

7. 发明专利

JPS58124950A DETERMINATION METHOD FOR SULFUR IN STEEL CLASSIFIED BY FORM 失效
公开(公告)号：JPS58124950A
公开(公告)日：1983-07-25
申请号：JP855382
申请日：1982-01-22
申请人： NIPPON KOKAN KK
发明人： TAKAHASHI TAKAMASA , ITOIDA MUTSUMI , CHINO ATSUSHI
IPC分类号： G01N33/20
摘要： PURPOSE:To perform the determination of sulfur in steel classified by form quickly with a good operational property, by determining an amount of sulfur exsisting as solid dissolved sulfur, iron sulfide and manganese sulfide in the steel from gaseous hydrogen sulfide obtained by reducing by heating under the existence of gaseous hydrogen. CONSTITUTION:A boat 4 taken in a steel sample 3 is placed in a tube 2 and a gaseous hydrogen 5 is flowed into the tube 2 flowing a gaseous nitrogen 6 in the tube 2 and a furnace 1 and then, a gaseous hydrogen atmosphere is produced by replacing air by said mixed gas. And, MnS, FeS and occluded S existing in the steel, are dissociated by heating the sample 3 in the tube 2 at 1,000-1,350 deg.C and dissociated sulfur is converted into hydrogen sulfide H2S by the gaseous hydrogen 5 and this hydrogen sulfide is analyzed automatically by a detector 9. In this manner, the amount of sulfur existing as the solid dissolved sulfur, iron sulfide and manganese sulfide is determined and the total amount of the sulfur in the steel is determined together with said sulfur amount. The sulfur amount existing as CaS, RES is found by subtracting the amount of the sulfur existing as the MnS and occluded S measured preliminarily from the total amount of the sulfur measured in such a manner.

8. 发明专利

JP2002174631A COMPONENT MEASURING DEVICE FOR MOLTEN METAL 有权
公开(公告)号：JP2002174631A
公开(公告)日：2002-06-21
申请号：JP2001288725
申请日：2001-09-21
申请人： NIPPON KOKAN KK
发明人： YOSHIDA KAZUO , ISHIDA TOMOHARU , CHINO ATSUSHI , WASHIMI FUMIHIRO , KIKUCHI YOSHITERU , KAWABATA RYO
IPC分类号： G01N1/10 , B22D2/00 , C21C5/46 , C21C5/48 , G01N21/27 , G01N33/20
摘要： PROBLEM TO BE SOLVED: To provide a component measuring device for molten metal capable of constantly providing a stable measuring plane irrespective of molten metal bulk conditions and accurately and quickly measuring components of a molten metal without contact by using the measuring plane. SOLUTION: This component measuring device is provided with a probe 10 dipped in the molten metal L and holding the molten metal inside, a measuring plane forming means 20 continuously feeding gas of a pressure higher than atmospheric pressure from above toward a surface of the molten metal L inside the probe 10, discharging the gas outside the probe, and forming the measuring plane on the surface of the molten metal inside the probe 10, and a measuring means 30 irradiating light containing a wavelength for component measurement on the measuring plane S through the probe 10 and measuring concentrations of predetermined components on the basis of reflected light.

9. 发明专利

JP2001316770A THIN SHEET MADE OF LOW THERMAL EXPANSION ALLOY FOR ELECTRONIC PARTS EXCELLENT IN RESIST ADHESION, AND ELECTRONIC PARTS 失效
公开(公告)号：JP2001316770A
公开(公告)日：2001-11-16
申请号：JP2000133160
申请日：2000-05-02
申请人： NIPPON KOKAN KK
发明人： SATO KAORU , CHINO ATSUSHI , YAMAUCHI KATSUHISA , MURATA TADAKAZU , MORITA YASUHIRO
IPC分类号： C22C38/00 , C22C19/03 , C22C38/08 , C22C38/10 , H01L23/50
摘要： PROBLEM TO BE SOLVED: To obtain thin sheet made of a low thermal expansion alloy for electronic parts excellent in resist adhesion by controlling the atom ratio, C/Fe, in the outermost surface layer of a thin sheet to be

10. 发明专利

JPH11229087A COLD ROLLED STEEL SHEET FOR PORCELAIN ENAMELING EXCELLENT IN FORMABILITY/ AND ITS PRODUCTION 失效
公开(公告)号：JPH11229087A
公开(公告)日：1999-08-24
申请号：JP5127898
申请日：1998-02-18
申请人： NIPPON KOKAN KK
发明人： ISHIGURO YASUHIDE , MATSUKI YASUHIRO , INOUE TADASHI , YAMADA KATSUMI , CHINO ATSUSHI , SATO KAORU
IPC分类号： B22D11/20 , C21D9/46 , C22C38/00 , C22C38/20
摘要： PROBLEM TO BE SOLVED: To provide a cold rolled steel sheet for porcelain enameling, improved in ferrite grain growth characteristic and excellent in formability, and its production. SOLUTION: This cold rolled steel sheet for porcelain enameling, excellent in formability, has a composition containing, by weight, =50% when the sizes of

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