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91. 发明专利

JPS60152382A DIFFUSION JOINING METHOD OF COPPER AND STAINLESS STEEL 失效
公开(公告)号：JPS60152382A
公开(公告)日：1985-08-10
申请号：JP719984
申请日：1984-01-20
申请人： HITACHI LTD
发明人： WACHI HIROSHI , FUNAMOTO TAKAO , KATOU MIZUO , TAKAHASHI KAZUYA , OGURA SATOSHI
IPC分类号： B23K20/00 , B23K1/00 , B23K20/227
摘要： PURPOSE:To join the joint surfaces of copper and/or stainless steel to be diffusion-joined under low pressure in short time and to obtain a joint part having good quality by forming an alloy layer having the m. p. lower than the m. p. of the joint surfaces to said surface. CONSTITUTION:An alloy layer having the m. p. lower than the m. p. of materials to be joined is formed to the joint surface of copper and/or stainless steel which is the material to be joined. The alloy layer surface is then positioned to face the adjacent members to be joined. The members are thereafter joined in a non-oxidizing atmosphere. The members are thus joined at the temp. lower than the m. p. of the materials to be joined under the low pressure in short time, by which the joint part having good quality is obtd.

92. 发明专利

JPS59225893A JOINING METHOD OF TI OR TI ALLOY TO AL OR AL ALLOY 失效
公开(公告)号：JPS59225893A
公开(公告)日：1984-12-18
申请号：JP10072683
申请日：1983-06-08
申请人： HITACHI LTD
发明人： FUNAMOTO TAKAO , WACHI HIROSHI , KATOU MITSUO , TAKAHASHI KAZUYA , OGURA SATOSHI , TANAKA SHIGERU , ISHIZUKA TATSUROU
IPC分类号： B23K20/00 , B23K20/233
摘要： PURPOSE:To form a joint part having high quality without intervention of a brittle intermetallic compd. by sputtering the surface of the joint part in a non-oxidative atmosphere then coating a material which is more hardly oxidized than Al and Ti and produces eutectic crystal with Al on the surface thereof. CONSTITUTION:Either one of Al or Al alloy material and Ti or Ti alloy material charged into a sample exchange chamber 2 is carried into a cleaning and surface treating chamber 1 where the surface is sputtered by an Ar ion beam and is then coated. The material is then returned to the chamber 2 and the other material is similarly treated in the chamber 1. The material is again returned to the chamber 2 and the joint surfaces of both materials are brought into tight contact with each other. The materials are then carried into a diffusion chamber 3 where the materials are joined. The coating in this case is formed on the surfaces in order to maintain the clean surfaces removed of oxide until joining and to permit easy joining. Ni, Cu, Si, etc. are used for coating. These coating materials melt by generating eutectic crystal with Al and are extruded in the stage of joining.

93. 发明专利

JPS58103972A WELDING METHOD FOR SINTERED HARD ALLOY HEAT RESISTING MATERIAL 失效
公开(公告)号：JPS58103972A
公开(公告)日：1983-06-21
申请号：JP20165481
申请日：1981-12-16
申请人： HITACHI LTD
发明人： WACHI HIROSHI , TAKAHASHI KAZUYA , FUNAMOTO TAKAO
IPC分类号： B23K9/23 , C22F1/10
摘要： PURPOSE:To enable welding with a weld zone excellent in quality and free from cracks by welding an Ni base sintered hard alloy heat resisting steel combining solution welding by arc welding method and specified heat treatment after welding. CONSTITUTION:In manufacturing a turbine blade by welding using an Ni base sintered hard alloy heat resisting steel, the material to be welded is heated beforehand to 500-650 deg.C, and TIG welding is performed while inserting a filler wire in inert atmosphere using Ar gas as shield gas. Minimum necessary welding current to melt the material to be welded is used and welding is performed in a short time. Before temperature of the weld zone drops to below 850 deg.C (point A), the material is put in a heating furnace set at 850 deg.C beforehand, heated to 1,100-1,200 deg.C and kept for 1-5hr. Then, after slow cooling to room temperature (point B), the material is aged by heating to 820-860 deg.C and keeping for 10-30hr. No cracking due to deposition of carbide occurs in the weld zone, and welding of Ni base sintered hard alloy heat resisting steel can be put to practical use.

94. 发明专利

JPS5584294A 13*CRRBASE STEEL WELDING WIRE 失效
公开(公告)号：JPS5584294A
公开(公告)日：1980-06-25
申请号：JP15642778
申请日：1978-12-20
申请人： HITACHI LTD
发明人： WACHI HIROSHI , SATOU AKIRA , SUZUKI MUNENOBU
IPC分类号： B23K35/368 , B23K35/30
摘要： PURPOSE:The captioned welding wire which is obtainable by inserting respectively the specific amounts of the wire composed of ferrite-base stainless steel and the flux powder of the specific composition in a hollow case made of carbon steel or low alloy steel and which stabilizes welding work and gives weld zone of high quality. CONSTITUTION:This wire comprises inserting the undermentioned wire and flux in the hollow case of the alloy steel or carbon steel containing one or more kinds of Cr; 0.1-5%, Ni; 1-6%, Mo; 0.1-2% and Nb; 0.05-1.5% in weight %. The ferrite-base stainless steel containing Cr; 10-15% is used at 10-30% of the entire part of the welding wire, as the wire to be inserted and the one comprising compounding the respective powders of CaF2; 8-20%, CaCO3; 15-40%, TiO2; 30- 40%, Cr; 0.1-6%, Ni; 1-6%, Mo; 0.1-2%, Nb; 0.05-1.5%, one or more kinds of Ti, Zr, Hf and Mg;

95. 发明专利

JPS54159359A MIG ARC WELDING METHOD 失效
公开(公告)号：JPS54159359A
公开(公告)日：1979-12-17
申请号：JP6765478
申请日：1978-06-07
申请人： HITACHI LTD
发明人： SATOU AKIRA , WACHI HIROSHI , OGURA SATOSHI , ASHITA EIJI
IPC分类号： B23K9/16 , B23K9/173
摘要： PURPOSE:To make large the amount of the deposited metal, and to execute the MIG arc welding with a good shape of penetration and a small rate of dilution, by feeding the arbitrary filler wire into the molten metal in which the molten particle of the welding wire is forced to cause the spray transfer. CONSTITUTION:The electrode wire 1 contacts with the work 3 to be welded, the arc 4 is generated, and the welding is executed. While the welding work, when the spray transfer is caused in a small molten particle, the filler wire 5 is always fed into the molten metal 9 formed by the arc. According to this method, the generation of the spatter is prevented, the amount of the deposited metal is increased, and the shape of penetration is rounded. By this method, a great effect is given to the overlay welding and the joint welding.

96. 发明专利

JPS51114346A HIGHHSTRENGTH MARTENSITE STAINLESS STEEL WELDING ROD FOR HIGHHTEMPERATURE USE 失效
公开(公告)号：JPS51114346A
公开(公告)日：1976-10-08
申请号：JP3914475
申请日：1975-04-02
申请人： HITACHI LTD
发明人： WACHI HIROSHI , OGURA SATOSHI , WATANABE KIYOSHI , SATOU AKIRA
IPC分类号： C22C38/00 , B23K35/24 , B23K35/30 , C22C38/18

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