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81. 发明专利

JPH0352776A ARC WELDING METHOD FOR HIGH DAMPING STEEL SHEETS 失效
公开(公告)号：JPH0352776A
公开(公告)日：1991-03-06
申请号：JP18770489
申请日：1989-07-20
申请人： NIPPON STEEL CORP
发明人： HORII YUKIHIKO , KOYAMA KUNIO , TOMITA YUKIO
IPC分类号： B23K9/23
摘要： PURPOSE:To reduce the high damping performance deterioration by heating the faces to be welded by a gas burner to burn up resin, then, inserting a spacer into a part where the resin existed or tack-welding plural steel sheets to secure the space and performing welding. CONSTITUTION:The resin to the extent that it is dissolved and evaporated by arc welding heat is burnt up and then, welding is performed. The spacer 3 is inserted continuously and intermittently into the position where the resin existed for shrinkage of a weld zone or tack-welding 4 is performed continuously or intermittently and the space where a resin layer 2 existed is secured and welding is performed. Metal or nonmetal, for instance, a ceramic thin plate which resists shrinkage at the time of welding and does not produce gas can be used as the spacer. Further, in order to prevent the flow of resin to the weld zone, one layer welding is desirable. By this method, welding can be easily applied to the manufacture of a structure utilizing the high damping steel sheets and the large-sized structure can be manufactured.

82. 发明专利

JPH02235585A ELECTRON BEAM WELDING METHOD FOR THICK STEEL PLATE 失效
公开(公告)号：JPH02235585A
公开(公告)日：1990-09-18
申请号：JP5342489
申请日：1989-03-06
申请人： NIPPON STEEL CORP
发明人： KOYAMA KUNIO , OKITA SHIGERU , SHINODA SHIGENORI
IPC分类号： B23K15/00
摘要： PURPOSE:To prevent the occurrence of weld defects due to drop-down of molten metal by abutting materials to be welded of thick steel plates on each other at a specified interval and arranging backing materials at an specified interval on the rear sides thereof to perform upward electron beam welding at the vertical position. CONSTITUTION:The two materials 1 to be welded of thick steel plates are abutted on each other and the interval between the abutting surfaces thereof is made to 0.3-1.2mm. Further, the backing materials 2 are arranged on the rear sides thereof and 0.3-4mm gap 8 is provided at the interval with the materials 1 to be welded. In this state, the materials 1 to be welded are irradiat ed with an electron beam from the arrow 6 direction and the molten metal 3 is formed and the materials 1 to be welded are subjected to upward welding at the vertical position. By this method, the molten metal 4 is prevented from dropping down to prevent the occurrence of the weld defects and the occurrence of blowhole defects of the penetration tip 7 is prevented.

83. 发明专利

JPH02117782A METHOD FOR WELDING T-JOINT BY ELECTRON BEAM WELDING 失效
公开(公告)号：JPH02117782A
公开(公告)日：1990-05-02
申请号：JP26724488
申请日：1988-10-25
申请人： NIPPON STEEL CORP
发明人： YURIOKA NOBUTAKA , HORII YUKIHIKO , KOYAMA KUNIO , OBARA MASAHIRO
IPC分类号： B23K15/00
摘要： PURPOSE:To prevent the occurrence of spike defects and to improve quality by irradiating metal plates with electron beam at the same time from both sides of a web and integrating molten metal pools formed by irradiation of the respective electron beam. CONSTITUTION:A flange 1 and the web 2 are formed in a T-shape by two metal plates and the electron beam irradiates at the same time from both sides of the web 2 and crossing of the formed molten metal pools is integrated. As a result, the width of the tip of penetration can be extended by synergism of the electron beam 3 from the respective sides and the spike defects can be prevented. Further, narrowing of the penetration width can be reduced by effect of electron beam energy from the facing sides which is effective for preventing the generation of lack of fusion.

84. 发明专利

JPS6427749A METHOD FOR CONTINUOUS CASTING OF METAL 失效
公开(公告)号：JPS6427749A
公开(公告)日：1989-01-30
申请号：JP18343587
申请日：1987-07-24
申请人： NIPPON STEEL CORP
发明人： KOYAMA KUNIO
IPC分类号： B22D11/10 , B22D11/04 , B22D11/059
摘要： PURPOSE:To prevent contact of a ceramic material with oxide in a cast billet and to extend the service life of the ceramic in continuous casting for metal by sealing gap part developed between the cast billet, which is solidified and shrunk in a mold lining the ceramic, and the mold by using non-oxidizing gas. CONSTITUTION:The molten metal is poured into the copper mold 11 lined by the ceramic 2 and the mold 1 is water-cooled from the outer surface to cool the ceramic 2 contacting with the mold 1. The gap developed between the ceramic 2 and the coagulated and solidified cast billet, is sealed with non- oxidizing gas of N2, Ar, etc., to prevent oxidation of the cast billet. As method of sealing, the non-oxidizing gas can be blow in the gap from gas blowing holes 10 fitted near the outlet side of the mold as showing in the figure. As a result, extension of the service life for the ceramic, improvements of casting efficiency and casting yield, etc., can be obtd.

85. 发明专利

JPS61195743A MOLD FOR CONTINUOUS CASTING OF STEEL 失效
公开(公告)号：JPS61195743A
公开(公告)日：1986-08-30
申请号：JP3463885
申请日：1985-02-25
申请人： NIPPON STEEL CORP
发明人： NAKANO TAKETO , KOYAMA KUNIO , ANDO SADAICHI
IPC分类号： B22D11/04 , B22D11/059 , B22D11/07 , B22D11/10 , B22D11/108 , B22D11/111
摘要： PURPOSE:To prevent the generation of the surface defect and breakout of an ingot by forming a thermally sprayed and fixed flux layer having a specific thickness and prescribed melting temp. range on the inside surface of a casting mold. CONSTITUTION:Raw material consisting essentially of a metallic oxide and metallic fluoride is sintered or melted and is disintegrated to manufacture a flux material. The compsn. thereof is so determined that the melting temp. is >=700 deg.C and

86. 发明专利

JPS57160597A MANUFACTURE OF LOW-HYDROGEN TYPE COATED ELECTRODE 失效
公开(公告)号：JPS57160597A
公开(公告)日：1982-10-02
申请号：JP4769681
申请日：1981-03-31
申请人： NIPPON STEEL CORP
发明人： TANIGAKI TAKASHI , KOSHIO TAKESHI , IWATA TOSHIO , KOYAMA KUNIO
IPC分类号： B23K35/365 , B23K35/40
摘要： PURPOSE:To elevate cracking resistance of a welding metal, by performing welding by use of a low-hydrogen type coated electrode having a coating agent which contains a small quantity of hectorite and consists of a caking agent of water-glass having a specific molar fraction of SiO2 and Na2O. CONSTITUTION:When welding dead thick steel without preheating it, a low- hydrogen type coated electrode coated with a coating agent consisting of the following composition is used. That is to say, the electrode to be used is obtained by coating a core wire consisting of soft steel or alloy steel, with a coating agent using water-glass as a coating agent to carbonate, a fluoride, a slag forming agent, a dioxidizer, alloy iron, iron powder, etc. In this case, 0.1-3% hectorite is added to the coating agent, also that which contains water-glass whose molar fraction of SiO2/Na2O is 2.0-2.6 is used, and the coating agent is heated and burnt at 500-800 deg.C in the atmosphere containing CO2 of 2% or more. A welding metal produced by use of this electrode has excellent cracking resistance.

87. 发明专利

JPS5514166A NONNFUSED FLUX FOR SUBMERGED ARC WELDING 失效
公开(公告)号：JPS5514166A
公开(公告)日：1980-01-31
申请号：JP8689978
申请日：1978-07-17
申请人： NIPPON STEEL CORP
发明人： NAGANO KIYOUICHI , TAKAMI TOSHIHIKO , KOYAMA KUNIO
IPC分类号： B23K35/36 , B23K35/362
摘要： PURPOSE:The captioned flux which comprises containing respectively the specified amounts of TiO2, Al2O3, CaF2, MgO, SiO2, B2O3 being the main components and further specifying the total sum of these main components and which gives good welding operation characteristic and low temperature fracture toughness particularly when used for horizontal position submerged arc welding. CONSTITUTION:This flux contains TiO2; 13 to 30%, Al2O3; 12 to 28%, CaF2; 10 to 26%, MgO; 24 to 40%, SiO2; 3 to 9%, B2O3; 0.1 to 1.0% and the total sum of these main components is within a range of 70 to 97%. This flux is produced by a non-fusion system. More specifically, the original powder is granulated by using a binder or fired or the entire part is high-temperature sintered, thence it is disintegrated and granulated, whereby this flux is produced.

88. 发明专利

JPS5419439A NONNFUSING FLUX FOR SUBMERGED WELDING 失效
公开(公告)号：JPS5419439A
公开(公告)日：1979-02-14
申请号：JP8392977
申请日：1977-07-13
申请人： NIPPON STEEL CORP
发明人： NAGANO KIYOUICHI , TAKAMI TOSHIHIKO , KOYAMA KUNIO
IPC分类号： B23K35/362
摘要： PURPOSE:To provide a flux, mainly with a specified composition of TiO2, CaF2, MgO, Al2O3, SiO2 and B2O3, which offers excellent weldability and mechanical property against horizontal submerged welding.

89. 发明专利

JPS5250945A BACKING FLUX FOR ONE SIDE ARC WELDING 失效
公开(公告)号：JPS5250945A
公开(公告)日：1977-04-23
申请号：JP12724675
申请日：1975-10-22
申请人： NIPPON STEEL CORP
发明人： TSUNETOMI EIICHI , NAGANO KIYOUICHI , NAGANUMA HIROSHI , KOYAMA KUNIO , KUMAGAI RIYOUHEI
IPC分类号： B23K35/362

90. 发明专利

JPS5152952A 失效
公开(公告)号：JPS5152952A
公开(公告)日：1976-05-11
申请号：JP12714774
申请日：1974-11-06
申请人： NIPPON STEEL CORP
发明人： TSUNETOMI EIICHI , NAGANO KYOICHI , NAGANUMA HIROSHI , KOYAMA KUNIO , SHINADA KOICHI
IPC分类号： B23K35/40 , B23K35/362

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