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31. 发明专利

JP2002327247A THIN SHEET OF LOW THERMAL EXPANSION ALLOY FOR ELECTRONIC COMPONENT, AND ELECTRONIC COMPONENT 失效
公开(公告)号：JP2002327247A
公开(公告)日：2002-11-15
申请号：JP2001135883
申请日：2001-05-07
申请人： NIPPON KOKAN KK
发明人： SATO KAORU , CHINO ATSUSHI , KITABUKI JUNICHI , ARIGA TAMAKO , UCHINO TOMOHIKO , IIZUKA TOSHIHARU , ICHIKAWA YUUEI
IPC分类号： C22C38/00 , C22C19/03 , C22C38/08 , C22C38/16
摘要： PROBLEM TO BE SOLVED: To provide a thin sheet of a low thermal expansion alloy with a superior etching property, and an electronic component with few defects of shape. SOLUTION: The thin sheet of a low thermal expansion alloy for electronic components, comprises a Fe-Ni base alloy containing 30-52 mass% Ni, or a Fe-Ni-Co base alloy containing 26-38 mass% Ni, and 1-20 mass% Co, and has a surface density of sulfides of 10,000-1,000,000 pieces/mm . The electronic component is obtained by means of etching the thin sheet of the low thermal expansion alloy.

32. 发明专利

JP2001152249A METHOD FOR PRODUCING MARTENSITIC STAINLESS STEEL 失效
公开(公告)号：JP2001152249A
公开(公告)日：2001-06-05
申请号：JP2000199032
申请日：2000-06-30
申请人： NIPPON KOKAN KK
发明人： NAKAMICHI JIRO , SATO KAORU , MINAMI YUSUKE , SHINPO YUKIO
IPC分类号： C21D8/02 , C22C38/00 , C22C38/40 , C22C38/44
摘要： PROBLEM TO BE SOLVED: To provide a method for producing martensitic stainless steel capable of imparting excellent toughness and a low yield ratio by improving heat treatment. SOLUTION: In this method for producing martensitic stainless steel, martensitic stainless steel containing, by mass, 0.006 to 0.03% C, 11 to 15% Cr, 1 to 7% Ni and 0.006 to 0.03% N is hot-waked, is cooled to a temperature (Mf point) in which martensitic transformation is completed, is heated at a two phase region temperature from (Ac1 transformation point temperature +Ac3 transformation point temperature)/2-20 deg.C to Ac3 transformation point temperature -10 deg.C, is subsequently cooled to

33. 发明专利

JP2001107264A RESIN CHROMATE TREATED METALLIC SHEET 失效
公开(公告)号：JP2001107264A
公开(公告)日：2001-04-17
申请号：JP32591599
申请日：1999-10-12
申请人： NIPPON KOKAN KK
发明人： HAMADA ETSUO , MORITA KENJI , SATO KAORU , MATSUZAKI AKIRA , YAMAJI TAKAFUMI
IPC分类号： B05D7/14 , B05D7/24 , C23C22/33 , C23C28/00
摘要： PROBLEM TO BE SOLVED: To provide a resin chromate treated metallic sheet free from environmental contamination, in which unevenness in appearance caused by blackening and dew condensation is hard to occur and capable of maintaining a beautiful surface appearance over a long period by realizing resin chromate excellent in corrosion resistance while chromium is made hard to dissolve. SOLUTION: This resin chromate treated metallic sheet is obtained by depositing a resin chromate film essentially consisting of a chromium compound and a water soluble or water dispersible resin on the surface of an Al-Zn series alloy plating film. In this sheet, the greater part of chromium is present as a trivalent compound compounded with phosphorous.

34. 发明专利

JP2000328207A SILICON STEEL SHEET EXCELLENT IN NITRIDING AND INTERNAL OXIDATION RESISTANCES 失效
公开(公告)号：JP2000328207A
公开(公告)日：2000-11-28
申请号：JP13650099
申请日：1999-05-18
申请人： NIPPON KOKAN KK
发明人： YAMADA KATSUMI , SATO KAORU , ODA YOSHIHIKO
IPC分类号： H01F1/16 , C22C38/00 , C22C38/06 , C22C38/60
摘要： PROBLEM TO BE SOLVED: To provide a silicon steel sheet excellent in nitriding and internal oxidation resistances under variable producing conditions in an actual producing process. SOLUTION: On the topmost surface layer within 50 nm from the surface of a silicon steel sheet, an oxidized coating film contg. >=20 wt.% Al2O3 and mainly composed of Al2O3+SiO2 is formed. For example, the silicon steel sheet is a nonoriented silicon steel sheet contg.

35. 发明专利

JP2000256800A LOW THERMAL EXPANSION ALLOY SHEET AND ELECTRONIC PARTS 失效
公开(公告)号：JP2000256800A
公开(公告)日：2000-09-19
申请号：JP5836899
申请日：1999-03-05
申请人： NIPPON KOKAN KK
发明人： SATO KAORU , ARIGA TAMAKO , MORITA YASUHIRO , YAMAMOTO AKIRA
IPC分类号： C22C38/00 , C22C38/08 , C22C38/10
摘要： PROBLEM TO BE SOLVED: To provide a low thermal expansion Fe-Ni or Fe-Ni-Co alloy sheet excellent in adhesion of resist and also to provide electronic parts using the sheet. SOLUTION: The sheet is a low thermal expansion Fe-Ni alloy sheet containing 30-50 wt.% Ni or a low thermal expansion Fe-Ni-Co alloy sheet containing 26-38 wt.% Ni and 1-20 wt.% Co. A surface layer containing hydroxide together with oxide is formed. With respect to the surface layer, the ratio of oxygen in the state of hydroxide to oxygen in the state of oxide is regulated to >=0.4; or, with respect to the surface layer, the ratio of Ni in the state of oxide and hydroxide to Fe in the state of oxide and hydroxide is regulated to >=0.5.

36. 发明专利

JP2000241338A METHOD FOR EVALUATING RUST STABILITY OF WEATHERRESISTANT STEEL MATERIAL 失效
公开(公告)号：JP2000241338A
公开(公告)日：2000-09-08
申请号：JP4746499
申请日：1999-02-25
申请人： NIPPON KOKAN KK
发明人： MORITA KENJI , SATO KAORU
IPC分类号： G01N17/00 , G01N33/20
摘要： PROBLEM TO BE SOLVED: To nondestructively and accurately evaluate the degree of stabilization of the rust layer of a weather-resistant steel material by sampling the rust layer adhering to ferrite that is formed on the surface of a steel material and measuring the amount of mass change at a specific temperature or more of the sampled rust powder. SOLUTION: A rust layer that adheres to ferrite being formed on the surface of a steel material is sampled, the amount of mass change at a temperature that is equal to or more than 100 deg.C of the sampled rust powder is measured, and the degree of stabilization of the rust layer is evaluated. When rust is to be sampled, the sampling is made separately to each of surface and inner layers of rust. Then, the mass of rust per unit area (1 cm2) is found, then a rust-sampling area and the total amount of sampling (total mass) of sampled rust are determined, required rust is sampled from the determined sampling area, and thermal analysis is made to each sampled rust, thus evaluating the degree of stabilization of rust. The amount of mass change due to a temperature change within a range of 105 to 300 deg.C caused by amorphous quantity and thermal analysis is constantly correlated according to the analysis result of the amorphous quantity by the thermal analysis and X-ray diffraction method for rust being formed at various kinds of weather-resistant steels.

37. 发明专利

JP2000212692A ELECTRIC RESISTANCE WELDED STEEL TUBE EXCELLENT IN GROOVING CORROSION RESISTANCE 失效
公开(公告)号：JP2000212692A
公开(公告)日：2000-08-02
申请号：JP1028099
申请日：1999-01-19
申请人： NIPPON KOKAN KK
发明人： YAMADA KATSUMI , NAKAMICHI JIRO , CHINO ATSUSHI , SATO KAORU
IPC分类号： C22C38/00 , C22C38/14
摘要： PROBLEM TO BE SOLVED: To provide a steel tube free from any lowering of the productivity and degradation of the workability by setting the difference in quantity of solid-solution S between a welded heat affected zone and a non-heat affected zone to be not more than a specified ratio to prevent generation of grooving corrosion. SOLUTION: Difference in quantity of solid-solution S is

38. 发明专利

JP2000054100A HOT-DIP ALUMINUM-ZINC ALLOY COATED STEEL SHEET EXCELLENT IN WHITE RUST RESISTANCE 失效
公开(公告)号：JP2000054100A
公开(公告)日：2000-02-22
申请号：JP23799198
申请日：1998-08-10
申请人： NIPPON KOKAN KK
发明人： MORITA KENJI , HAMADA ETSUO , OKUDE SHINYA , SATO KAORU , OI TOSHIHIKO
IPC分类号： B05D7/14 , C23C2/06 , C23C2/12 , C23C28/00
摘要： PROBLEM TO BE SOLVED: To provide a hot-dip Al-Zn alloy coated steel sheet extremely excellent in corrosion resistance. SOLUTION: Corrosion of a hot-dip Al-Zn alloy coated steel sheet takes place with a coarse β-Zn crystalline grain as the starting point, and a plated steel sheet having excellent white rust resistance can be obtained by reducing the percentage of the coarse β-Zn crystalline grain to the prescribed level. This steel sheet is a hot-dip Al-Zn alloy coated steel sheet in which Al is contained by 20 to 95 wt.% in a plating film and coating weight per side is regulated to (15 to 100) g/m2. In an arbitrary section of the plating film, =0.5 μm grain size is regulated to

39. 发明专利

JP2000017373A FINE OXIDE-DISPERSED STEEL 失效
公开(公告)号：JP2000017373A
公开(公告)日：2000-01-18
申请号：JP17990198
申请日：1998-06-26
申请人： NIPPON KOKAN KK
发明人： SATO KAORU , ISHIGURO YASUHIDE , YAMADA KATSUMI , CHINO ATSUSHI
IPC分类号： C22C38/00
摘要： PROBLEM TO BE SOLVED: To stably maintain the strength of steel at a high temp. by incorporating fine oxide particles of specified particle size essentially consisting of Cr and Mn in specified ranges. SOLUTION: In steel, fine oxide particles of =10 nm or 200 mass ppm, the oxides are coarsened, and the melting of the steel is made difficult. For forming this fine oxides, the steel is added with >=0.0060% O, >=0.03% Cr and >=0.2% Mn. Furthermore, for preventing the check of the formation of the fine oxides, the content of Si in the steel is controlled to

40. 发明专利

JPH1060609A NONORIENTED SILICON STEEL SHEET EXCELLENT IN CORE LOSS CHARACTERISTICS AND LOW MAGNETIC FIELD CHARACTERISTICS 失效
公开(公告)号：JPH1060609A
公开(公告)日：1998-03-03
申请号：JP17781196
申请日：1996-07-08
申请人： NIPPON KOKAN KK
发明人： ODA YOSHIHIKO , HIURA AKIRA , UEI SEISHI , SATO KAORU
IPC分类号： C22C38/00 , C22C38/16 , H01F1/147 , H01F1/16
摘要： PROBLEM TO BE SOLVED: To provide a nonoriented silicon steel sheet in which a growth of crystal grains at a low temp. in a short time is facilitate, low in core loss even in the case of low temp.-short time finish annealing and magnetic annealing, and improved in low magnetic field characteristics. SOLUTION: This steel sheet is the one having a compsn. contg., by weight,

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