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61. 发明专利

JPS62182258A MANUFACTURE OF HIGH-DUCTILITY AND HIGHLY CORROSION-RESISTANT ZIRCONIUM-BASE ALLOY MEMBER AND THE MEMBER 失效
公开(公告)号：JPS62182258A
公开(公告)日：1987-08-10
申请号：JP2383586
申请日：1986-02-07
申请人： HITACHI LTD
发明人： YOSHIDA SUMI , TAKASE IWAO , INAGAKI MASATOSHI , KUNIYA JIRO , MATSUMOTO TOSHIHIRO
IPC分类号： C22F1/18 , C22F1/00
摘要： PURPOSE:To manufacture a Zr-base alloy member having high ductility and high corrosion resistance, by subjecting a Zr-base alloy containing Nb, Sn, Fe, and 0 to specific solution heat treatment, to cold working, and to specific aging treatment to form a specific metallic structure. CONSTITUTION:The Zr-base alloy material containing, by weight, 0.2-5.0% Nb, 0.5-3% Sn, 0.1-2.0% Fe, and 500-2,000ppm O is subjected to solution heat treatment by rapidly cooling from the temp. range of an (alpha+beta)- or alpha-phase. The material then is subjected to cold working at a draft of at least >=15% and to aging treatment at and above the recrystallization temp. in the alpha-phase temp. range. In this way, the material is formed into the metallic structure consisting of granular recrystallization structure and fine precipitates and free from residual structure of martensitic or Widmanstaetten state, so that Zr-base alloy member free of nodular corrosion and having high strength and high ductility can be obtained.

62. 发明专利

JPS6252492A NUCLEAR FUEL AGGREGATE 失效
公开(公告)号：JPS6252492A
公开(公告)日：1987-03-07
申请号：JP19343885
申请日：1985-09-02
申请人： HITACHI LTD
发明人： YOSHIDA SUMI , TAKASE IWAO , KUNIYA JIRO , MASAOKA ISAO , UMEHARA HAJIME
IPC分类号： G21C3/20 , G21C3/32 , G21C3/326 , G21C3/33

63. 发明专利

JPS6145699B2 失效
公开(公告)号：JPS6145699B2
公开(公告)日：1986-10-09
申请号：JP11973981
申请日：1981-07-29
申请人： HITACHI LTD
发明人： YOSHIDA SUMI , MAKI HIDEO , UMEHARA HAJIME , YASUDA TETSUO , MASAOKA ISAO , TAKASE IWAO , INAGAKI MASATOSHI , JINBO RYUTARO , KUNYA KEIICHI
IPC分类号： G21C3/00 , C22F1/18

64. 发明专利

JPS61184485A FUEL CHANNEL BOX 失效
公开(公告)号：JPS61184485A
公开(公告)日：1986-08-18
申请号：JP2342785
申请日：1985-02-12
申请人： HITACHI LTD
发明人： TAKASE IWAO , YOSHIDA SUMI , IKEDA SHINZO , MASAOKA ISAO , NAKAJIMA JUNJIRO
IPC分类号： G21C3/30 , G21C3/324

65. 发明专利

JPS61174347A NODULAR CORROSION RESISTING ZIRCONIUM-BASE ALLOY 失效
公开(公告)号：JPS61174347A
公开(公告)日：1986-08-06
申请号：JP1424185
申请日：1985-01-30
申请人： HITACHI LTD
发明人： TAKASE IWAO , YOSHIDA SUMI , IKEDA SHINZO , MASAOKA ISAO , NAKAJIMA JUNJIRO
IPC分类号： C22C16/00
摘要： PURPOSE:To obtain the Zr-base alloy causing no nodular corrosion under the high-temp. and high-pressure water or steam environment of a nuclear reactor by arranging and precipitating the precipitates in the prescribed range in an alloy having a specific composition consisting of Sn, Fe, Cr, Ni, Nb, V, Ti, and Zr. CONSTITUTION:Tubes, rods, plates and the like of a Zr-base alloy are composed of the nodular corrosion resisting Zr-base alloy which has a chemical composition consisting of, by weight, 1.0-2.0% Sn, 0.05-0.20% Fe, 0.05-0.20% Cr, 0% or 0.03-0.1% Ni, and 0.03-2.0% of >=1 kind among Nb, V, and Ti, and the balance Zr and in which the precipitates in its alloy structure are arranged and precipitated in the prescribed range. In the manufacturing process, the above alloy is subjected to solution heat treatment by cooling rapidly from the temp. including beta phase before hot plastic working, preferably to further solution heat treatment after the hot plastic working, and then to final annealing at high temp., so as to form the precipitates with prescribed arrangement to manufacture the excellent nodular corrosion resisting Zr-base alloy.

66. 发明专利

JPS61165685A METHOD OF EVALUATING STRESS CORROSION CRACK SENSIBILITY OF FUEL COATED TUBE 失效
公开(公告)号：JPS61165685A
公开(公告)日：1986-07-26
申请号：JP573085
申请日：1985-01-18
申请人： HITACHI LTD
发明人： TAKASE IWAO , YOSHIDA SUMI , IKEDA SHINZO , MASAOKA ISAO , NAKAJIMA JUNJIRO
IPC分类号： G21C17/06

67. 发明专利

JPS6017636B2 失效
公开(公告)号：JPS6017636B2
公开(公告)日：1985-05-04
申请号：JP10490477
申请日：1977-09-02
申请人： HITACHI LTD
发明人： MASAOKA ISAO , SHIMANUKI SHIZUKA , MATSUZAKA KYO , TAKASE IWAO , WATANABE MASARU , YOSHIOKA TAKATOSHI , SAKAMOTO MASAHIKO , SHIGA MASAO
IPC分类号： B23K31/00 , C21D7/00 , C21D8/00 , C21D9/50

68. 发明专利

JPS5675552A HYDROGENNRESISTANT LOWWALLOY STEEL 失效
公开(公告)号：JPS5675552A
公开(公告)日：1981-06-22
申请号：JP15008579
申请日：1979-11-21
申请人： HITACHI LTD
发明人： TAKASE IWAO , KIRIHARA SEISHIN , IKEDA SHINZOU , MASAOKA ISAO
IPC分类号： C22C38/00 , C22C38/22
摘要： PURPOSE:To obtain a low alloy steel with superior hydrogen resistance by controlling the Al content of steel to a very small amount and adding an adequate amount of C, Si Mn, Cr and Mo. CONSTITUTION:This low alloy steel contains 0.05-0.24% C, 0.015-0.5% Si, 0.4-1.5% Mn, 0.02-3.5% Cr, 0.3-1.5% Mo and 0.002-0.010% Al. Since this steel has superior hydrogen resistance and is hardly made brittle in a hydrogen atmosphere or high temp. and pressure, it is suitable for use as a material for an ammonia plant, a methanol plant and an apparatus such as a desulfurization reactor.

69. 发明专利

JPS5550993A BUILDDUP WELDING METHOD 失效
公开(公告)号：JPS5550993A
公开(公告)日：1980-04-14
申请号：JP12257478
申请日：1978-10-06
申请人： HITACHI LTD
发明人： TAKASE IWAO , KIRIHARA SEISHIN , IKEDA SHINZOU
IPC分类号： B23K33/00
摘要： PURPOSE:To obtain welded structure of high reliability not causing hydrogen attack, by build up welding the surface of deposited metal of welded joint of steel structure used under the environment of high-temperature, high-pressure hydrogen, in the specified position by using pure iron filler metal. CONSTITUTION:Weld zones of base metal 1, especially weld metal 5 in the final welding layer and coarse crystal heat affected zone 2 are likely to cause high-temperature, high-pressure hydrogen brittleness. In order to prevent this, build-up welding 4 is performed so that the weld end part may be positioned 1 to 5mm inside of the weld end part. As a result, the coarse grain region of the coarse crystal heat affected zone 2 and weld metal 5 is changed to fine grains by the heat cycle of build-up welding, and the resistance to hydrogen is improved by the tempering effect. If 1mm or less, new coarse crystal heat affected zone is formed; if 5mm or more, the fine granulating effect does not appear. The build-up weld should consist of pure iron having a high resistance to hydrogen, or one or two or more kinds of carbide forming elements being stable against hydrogen attack, Cr 3% or less, Mo 1% or less, and Ti 0.3% or less, and the remainder of iron.

70. 发明专利

JP2000097843A CORROSION EVALUATION METHOD FOR ZIRCONIUM-SERIES METAL AND ZIRCONIUM-BASED ALLOY 失效
公开(公告)号：JP2000097843A
公开(公告)日：2000-04-07
申请号：JP27116198
申请日：1998-09-25
申请人： HITACHI LTD
发明人： TAKASE IWAO , FUJIEDA TADASHI , ABE TERUYOSHI , YASUDA TAKAYOSHI
IPC分类号： G01N17/00 , G21C3/20 , G21C17/06 , G21D1/00
摘要： PROBLEM TO BE SOLVED: To provide a corrosion evaluation method for a zirconium-series metal, excellent in water quality impact assessment, in material selection of the zirconium- series material for being used in a high-temperature water environment. SOLUTION: A zirconium-series metal is given an initial oxidation treatment comprising a prescribed-time heating treatment (single-step treatment) at a constant temperature in high-temperature water or in high-temperature water and steam by using test water having a dissolved oxygen quantity of 2-100 ppb, or a step-wise prescribed- time heating treatment (plural-step treatment) at prescribed temperatures in high- temperature water or in high-temperature water and steam by using test water having a dissolved oxygen quantity of 2-100 ppb, and thereafter given a high-temperature water treatment for heating as long as a prescribed time at an actual machine using temperature by using test water having the same dissolved oxygen quantity as the dissolved oxygen quantity of the actual machine. After cooling the metal once, the metal is treated in high-pressure steam at 490-510 deg.C for 120-240 hours, and evaluated by measurement of the thickness of an oxide film formed on the surface of the zirconium-series metal and by the existence of a local accelerated corrosion.

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