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    Method of maintaining housing of reactor pressure vessel and heat treatment equipment therefor
    1.
    发明授权
    Method of maintaining housing of reactor pressure vessel and heat treatment equipment therefor 失效
    维护反应堆压力容器及其热处理设备的方法

    公开(公告)号：US5329099A

    公开(公告)日：1994-07-12

    申请号：US704289

    申请日：1991-05-22

    申请人： Kunio Enomoto ,  Masahiro Otaka ,  Kunio Hasegawa ,  Makoto Hayashi ,  Shinji Sakata ,  Hideyo Saito ,  Koichi Kurosawa ,  Takashi Saito ,  Yoshinori Karatsu ,  Motoya Ito

    发明人： Kunio Enomoto ,  Masahiro Otaka ,  Kunio Hasegawa ,  Makoto Hayashi ,  Shinji Sakata ,  Hideyo Saito ,  Koichi Kurosawa ,  Takashi Saito ,  Yoshinori Karatsu ,  Motoya Ito

    IPC分类号： G21C19/02 ,  B23K13/01 ,  G21C13/00 ,  G21C13/087 ,  G21C17/10 ,  G21C19/20

    CPC分类号： B23K13/01 ,  G21C13/00 ,  G21C13/087 ,  G21Y2002/201 ,  G21Y2002/202 ,  G21Y2004/201 ,  G21Y2004/40 ,  Y02E30/40

    摘要： A method of maintaining the housing of a reactor pressure vessel having: a reactor pressure vessel into which cooling water is introduced; a cylindrical housing which penetrates an end bracket of the reactor pressure vessel; and a circumferential weld for securing the intermediate portion of the housing to the reactor pressure vessel by welding, the method of maintaining a housing of a reactor pressure vessel comprising the steps of: remaining the cooling water in the reactor pressure vessel; preventing leakage of the cooling water in the reactor pressure vessel through the housing by sealing the housing; making the inside portion of the housing lower than the seal to be a hollow space of a gas atmosphere; heating a heat affected zone due to welding by using a heating device inserted into the hollow space from a lower portion so as to compressive-yield the inner surface of the housing in the heat affected portion upper than the circumferential weld and tensile-yield the outer surface; and cooling heated portion inside of the housing, which has been yielded, so as to tensile-yield the inner surface of the housing by using a cooling device inserted into the housing from a lower portion, whereby compressive stress is allowed to remain in the tensile-yielded portion.

    摘要翻译： 一种维持反应堆压力容器的壳体的方法，该反应堆压力容器具有：引入冷却水的反应堆压力容器; 圆柱形壳体，其穿过反应堆压力容器的端部支架; 以及用于通过焊接将壳体的中间部分固定到反应堆压力容器的圆周焊缝，保持反应堆压力容器的壳体的方法，包括以下步骤：在反应堆压力容器中保留冷却水; 防止反应堆压力容器内的冷却水通过密封壳体而通过壳体泄漏; 使壳体的内部低于密封件成为气体气氛的中空空间; 通过使用从下部插入到中空空间中的加热装置来加热受热影响区域，以便在高于周向焊缝的热影响部分中压缩屈服于壳体的内表面并拉伸屈服外侧 表面; 以及已经产生的壳体内部的冷却加热部分，以便通过使用从下部插入到壳体中的冷却装置来拉伸屈服壳体的内表面，由此使压缩应力保持在拉伸 硬部分。

    Method of and apparatus for water-jet peening
    2.
    发明授权
    Method of and apparatus for water-jet peening 失效
    喷水喷丸的方法和装置

    公开(公告)号：US5305361A

    公开(公告)日：1994-04-19

    申请号：US8718

    申请日：1993-01-25

    申请人： Kunio Enomoto ,  Masahiro Otaka ,  Koichi Kurosawa ,  Hideyo Saito ,  Hiroshi Tsujimura ,  Yasumasa Tamai ,  Keiichi Uraki ,  Masahito Mochizuki

    发明人： Kunio Enomoto ,  Masahiro Otaka ,  Koichi Kurosawa ,  Hideyo Saito ,  Hiroshi Tsujimura ,  Yasumasa Tamai ,  Keiichi Uraki ,  Masahito Mochizuki

    IPC分类号： C21D7/04 ,  B05B15/06 ,  B05B17/06 ,  B24C1/10 ,  C21D7/06 ,  G21C19/00 ,  G21D1/00

    CPC分类号： G21C19/00 ,  B05B15/061 ,  B05B17/0615 ,  C21D7/06 ,  G21Y2002/201 ,  G21Y2004/30 ,  G21Y2004/40

    摘要： A water jet peening method in which a pressurized water jet flow containing cavities is jetted through a nozzle having a velocity increasing orifice portion and a horn-like jetting hole formed continuously with the velocity increasing orifice portion to impinge against a surface of a metallic material immersed in water and to cause the cavities to collapse at the surface of the metallic member, and a tensile plastic deformation is caused in a surface layer of the metallic material by a local high pressure generated by the impingement and the collapse so that a residual tensile stress in the surface of the metallic member is reduced. In this method, the nozzle is vibrated so that vibration-induced cavities are formed in the vicinity of a nozzle wall surface, and the vibration-induced cavities are caused to impinge against the surface of the metallic member by the pressurized water jet flow containing cavities. It is thereby possible to promote the generation of cavities even in a case where pure water existing in a nuclear reactor and scant of nuclei from which cavities will be generated is used in peening of an internal structual member of the reactor.

    摘要翻译： 一种喷水喷丸法，其中通过具有速度增加孔部分的喷嘴喷射含有空腔的加压水射流，并且与增速孔部分连续形成的喇叭形喷射孔冲击浸入金属材料的表面 并导致空腔在金属构件的表面处塌陷，并且通过由冲击和塌陷产生的局部高压在金属材料的表面层中引起拉伸塑性变形，使得残余拉伸应力 在金属构件的表面减少。 在该方法中，喷嘴被振动，使得在喷嘴壁表面附近形成振动引起的空腔，并且使振动引起的空腔通过包含加压水射流的空腔与金属构件的表面碰撞 。 因此，即使在核反应堆中存在的纯水和将产生空腔的细小核的情况下，也可以促进空腔的产生，从而在反应器的内部结构构件的喷丸处理中使用。

    Method and structure for preventive maintaining an elongated metal hollow member
    3.
    发明授权
    Method and structure for preventive maintaining an elongated metal hollow member 失效
    用于预防性维护延伸金属中空会员的方法和结构

    公开(公告)号：US5227124A

    公开(公告)日：1993-07-13

    申请号：US561684

    申请日：1990-08-02

    申请人： Hideyo Saito ,  Koichi Kurosawa ,  Takayuki Numata ,  Shigeo Hattori ,  Takenori Shindo

    发明人： Hideyo Saito ,  Koichi Kurosawa ,  Takayuki Numata ,  Shigeo Hattori ,  Takenori Shindo

    IPC分类号： G21C13/02

    CPC分类号： G21C13/02 ,  Y02E30/40

    摘要： An ICM housing welded to a wall of a reactor pressure vessel in operation is provided with a molten metal layer containing 4 wt. % or more .delta. ferrite at a portion of an inner peripheral surface thereof which corresponds to a weld. A sleeve made of stainless steel is located at the competent portion of the inner peripheral surface of the ICM housing stainless steel so as to be molten by means of a TIG welding machine to form the molten metal layer. The molten metal layer prevents stress corrosion cracking of the ICM housing.

    摘要翻译： 在操作中焊接到反应堆压力容器的壁上的ICM外壳设置有含有4wt。 在其内周面的与焊接相对应的部分处的δ以上的δ铁素体。 由不锈钢制成的套筒位于ICM外壳不锈钢的内周面的主体部分，以便通过TIG焊接机熔化，形成熔融金属层。 熔融金属层防止ICM外壳的应力腐蚀开裂。

    Method for improving property of weld of austenitic stainless steel
    8.
    发明授权
    Method for improving property of weld of austenitic stainless steel 失效
    改善奥氏体不锈钢焊缝性能的方法

    公开(公告)号：US5022936A

    公开(公告)日：1991-06-11

    申请号：US445535

    申请日：1989-12-04

    申请人： Hiroshi Tsujimura ,  Yasumasa Tamai ,  Hideyo Saito ,  Masahiro Kobayashi

    发明人： Hiroshi Tsujimura ,  Yasumasa Tamai ,  Hideyo Saito ,  Masahiro Kobayashi

    IPC分类号： C21D1/00 ,  C21D9/50

    CPC分类号： C21D1/00 ,  C21D9/50 ,  B23K2203/05 ,  Y10S148/903

    摘要： A method for improving a property of a weld of an austenitic stainless steel which is a part of a structure being brought into contact with a corrosive fluid at a region having been affected by welding heat on both of opposed surfaces, comprising the steps of: cooling said thermally affected region on one of said opposed surfaces; and simultaneously with said cooling step, applying a melting treatment to the other surface, thereby changing the melting treatment portion into a micro structure that contains delta (.delta.) ferrite and is superior in corrosion resistance property. The latter surface is improved in high tensile stress generated by the welding work. Namely, its stress is reduced. The melting heat for said melting treatment is obtained by application of high density energy.

    摘要翻译： 一种用于改善奥氏体不锈钢的焊接性能的方法，所述奥氏体不锈钢是在相对的表面上受到焊接热影响的区域与腐蚀性流体接触的结构的一部分，包括以下步骤：冷却 所述热影响区域位于所述相对表面之一上; 并且与所述冷却步骤同时对另一个表面进行熔融处理，从而将熔融处理部分改变为含有δ（δ）铁素体的微结构，并且具有优异的耐腐蚀性。 后者表面改善了焊接工作产生的高拉伸应力。 即，其应力降低。 通过施加高密度能量获得用于所述熔融处理的熔化热。