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1. 发明专利

JPH0299294A EQUIPMENT MEMBER HAVING EXCELLENT NITRIC ACID RESISTANCE 失效
公开(公告)号：JPH0299294A
公开(公告)日：1990-04-11
申请号：JP25183388
申请日：1988-10-07
申请人： HITACHI LTD
发明人： YOSHIDA SUMI , YOKOSUKA TSUNENOBU , TSUJIMURA HIROSHI , TAMAI YASUKATA , SASADA YASUHIRO
IPC分类号： B23K31/00 , B23K9/00
摘要： PURPOSE:To improve the corrosion resistance in nitric acid and to extend the service life of the above member by composing the base metal consisting of an austenitic stainless steel in such a manner that the weld metal formed by melting and solidifying of the base metal has the solidification form to first crystallize a delta ferrite phase at the time of solidification. CONSTITUTION:The compsn. of the base metal of the austenitic stainless steel consists, by weight, of

2. 发明专利

JPH01206295A SPENT NUCLEAR FUEL REPROCESSING PLANT 失效
公开(公告)号：JPH01206295A
公开(公告)日：1989-08-18
申请号：JP2875588
申请日：1988-02-12
申请人： HITACHI LTD
发明人： HOSOI NORIFUNE , IKEDA SHINZO , KUNIYA JIRO , YOSHIDA SUMI , FUKAI AKIRA , URAYAMA YOSHINAO , YOKOSUKA TSUNENOBU , ANZAI HIDEYA
IPC分类号： G21C19/46 , C22C38/00 , C22C38/40 , G21F9/22
摘要： PURPOSE:To maintain corrosion resistance by making austenite stainless steel which comes in contact with nitric acid solution, contains C: 0.02 or less, Mn: 5 or less, Si: 0.5 or less, Cr: 18-22, Ni: 0.9-1.1 times of a Cr content by weight and the residual of Fe and the like. CONSTITUTION:Austenite stainless steel having components composed of C: 0.02 or less, Mn: 5 or less, Si: 0.5 or less, Cr: 18-22, Ni: 0.9-1.1 times of a Cr content by weight and the residual of Fe and inevitable impurities is used for a part of members which comes in contact with solution concentration more than 2 normal of nitric acid concentration. The whole surface corrosion resistance is considerably improved together with the increase of a Cr content and the more an Ni content is, the less corrosion reducing quantity is even if it is immersed in corrosion environment of either Ru containing nitric acid or nitric acid.

3. 发明专利

JPH0114993B2 失效
公开(公告)号：JPH0114993B2
公开(公告)日：1989-03-15
申请号：JP20467083
申请日：1983-11-02
申请人： HITACHI LTD
发明人： TAKASE IWAO , YOSHIDA SUMI , IKEDA SHINZO , MASAOKA ISAO , UMEHARA HAJIME
IPC分类号： C22F1/00 , C22F1/18

4. 发明专利

JPS63290700A PROTECTION METHOD FOR WELD ZONE 失效
公开(公告)号：JPS63290700A
公开(公告)日：1988-11-28
申请号：JP12587687
申请日：1987-05-25
申请人： HITACHI LTD
发明人： HOSOI NORIFUNE , YOKOSUKA TSUNENOBU , YOSHIDA SUMI , KUNIYA JIRO
IPC分类号： B23K31/00 , C25D5/26
摘要： PURPOSE:To protect a weld zone of stainless steel from a corrosive atmosphere by coating the weld zone of stainless steel in contact with highly corrosive aq. soln. of nitric acid with highly corrosion resistant metal. CONSTITUTION:An electrolytic cell 1 is provided at the front end of a remote- control arm 6, each of electrodes 9, 10 is provided inside and outside the electrolytic cell 1 and the outside electrode 10 is connected to an apparatus to be treated through a lead wire 14. Using the inside electrode 9 as a cathode and the outside electrode 10 as an anode in this apparatus, an anodic electrolysis is carried out to the weld zone to remove its oxide scale. At the time of electroplating, the electrolytic cell 1 of the apparatus is functioned as a plating vessel, plating bath is circulated on behalf of electrolytic solution and the weld zone can be covered with a plated layer by using the inside electrode 9 as a cathode and the outside electrode 10 as an anode. The weld zone 5 exposed an active metal surface 4 is coated by electroplating method with a highly corrosion resistant metal 2 and the weld zone 5 is protected from a corrosive atmosphere.

5. 发明专利

JPS6331543B2 失效
公开(公告)号：JPS6331543B2
公开(公告)日：1988-06-24
申请号：JP26118785
申请日：1985-11-22
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： C22F1/18 , C22F1/00

6. 发明专利

JPS62297449A PRODUCTION OF ZIRCONIUM ALLOY MEMBER 失效
公开(公告)号：JPS62297449A
公开(公告)日：1987-12-24
申请号：JP14010786
申请日：1986-06-18
申请人： HITACHI LTD
发明人： MATSUMOTO TOSHIHIRO , UMEHARA HAJIME , INAGAKI MASATOSHI , TAKASE IWAO , YOSHIDA SUMI
IPC分类号： C22C16/00 , C22F1/00 , C22F1/18
摘要： PURPOSE:To improve the corrosion resistance, ductility and strength of a Zr alloy contg. specified amounts of Nb, Sn and Mo by subjecting the alloy to soln. heat treatment, cold working and aging under prescribed conditions. CONSTITUTION:A Zr alloy contg., by weight, 1-2.5% Nb, 0.5-2% Sn and 0-1% Mo (Mo+Nb=1.5-2.5%) is manufactured by melting. The alloy is subjected to soln. heat treatment by rapid cooling from a temp. in the (alpha+beta) phase or beta-phase temp. range. The alloy is cold worked to form a granular recrystallized structure contg. no residual martensite or Widmanstatten structure. The alloy is then aged by heating and holding at a temp. in the alpha-phase temp. range to provide a metallic structure contg. a fine precipitate.

7. 发明专利

JPS62110190A SOLID MODERATING ROD 失效
公开(公告)号：JPS62110190A
公开(公告)日：1987-05-21
申请号：JP24884585
申请日：1985-11-08
申请人： HITACHI LTD
发明人： YOSHIDA SUMI , KUNIYA JIRO , MASAOKA ISAO , YASUDA TETSUO
IPC分类号： G21C5/00 , G21C3/32 , G21C3/326

8. 发明专利

JPS6214027B2 失效
公开(公告)号：JPS6214027B2
公开(公告)日：1987-03-31
申请号：JP17276781
申请日：1981-10-30
申请人： HITACHI LTD
发明人： TAKASE IWAO , IKEDA SHINZO , YOSHIDA SUMI , MASAOKA ISAO , UMEHARA HAJIME
IPC分类号： C22F1/18

9. 发明专利

JPS6118842A Method for descriminating corrosion resistance of zirconium-base alloy 失效
标题翻译：用于抑制锆基合金耐腐蚀性的方法
公开(公告)号：JPS6118842A
公开(公告)日：1986-01-27
申请号：JP14111384
申请日：1984-07-06
申请人： Hitachi Ltd
发明人： TAKASE IWAO , IKEDA SHINZOU , YOSHIDA SUMI , MASAOKA ISAO , NAKAJIMA JIYUNJIROU
IPC分类号： G01N17/00 , G01N17/02
CPC分类号： G01N17/02
摘要： PURPOSE:To evaluate corrosion resistance, by electrolyzing a zirconium-base alloy in acidic electrolytic aqueous solution by using the same as an anode and calculating the polarization curve thereof. CONSTITUTION:An aqueous sulfuric acid solution 2 is received in an electrolytic cell 1 as an electrolyte and a specimen 3 comprising a zirconium-base alloy is used as an anode while platinum 4 is used as the opposed electrode and a saturated calomel electrode 6 is used as a collimation electrode through a salt bridge 5 to calculate the polarization curve 7 of the zirconium-base alloy. The change in current density at constant potential is lowered in a uniform gradient with the elapse of time. When current density is not changed even at arbitrary voltage, it is judged that the zirconium-base alloy is a material having high corrosion resistance.
摘要翻译：目的：为了评价耐腐蚀性，可以通过使用与阳极相同的酸性电解水溶液电解锆基合金并计算其极化曲线。构成：将电解槽1中的硫酸水溶液2作为电解液接收，使用包含锆基合金的试样3作为阳极，使用铂4作为对置电极，使用饱和甘汞电极6 作为准直电极通过盐桥5来计算锆基合金的极化曲线7。恒定电位下电流密度的变化随着时间的推移以均匀的梯度降低。当电流密度即使在任意电压下也不变化时，判断为锆基合金是耐腐蚀性高的材料。

10. 发明专利

JPS6043450A ZIRCONIUM ALLOY SUBSTRATE 失效
公开(公告)号：JPS6043450A
公开(公告)日：1985-03-08
申请号：JP14947383
申请日：1983-08-16
申请人： HITACHI LTD
发明人： YOSHIDA SUMI , TAKASE IWAO , IKEDA SHINZOU , MASAOKA ISAO , UMEHARA HAJIME
IPC分类号： C22C16/00 , G21C3/06 , G21C3/07 , G21C5/00
摘要： PURPOSE:To provide superior mechanical properties and corrosion resistance to a Zr alloy substrate by forming a diffusion layer of Nb on at least part of the surface layer of the substrate. CONSTITUTION:A diffusion layer of Nb contg. 0.5-6wt% Nb is formed on at least part of a Zr alloy substrate contg., by weight, 1-20% Sn, 0.1-0.3% Fe, 0.01-0.2% Cr and

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