The present invention is characterized in that: an overlapping step, in which a front surface (1b) of a first metal member (1) and a back surface (2c) of a second metal member (2) are overlapped, and a welding step, in which the first metal member (1) and the second metal member (2) are subjected to hybrid welding using a hybrid welder provided with a preceding laser welding unit and a succeeding arc welding unit, are included; and, in the welding step, along a set movement route (L1) set in an overlap section (J1) formed by the overlapping of the first metal member (1) and the second metal member (2), the overlap section (J1) is irradiated with a laser beam (LB) from a front surface (2b) of the second metal member (2) to perform the laser welding and the arc welding, the laser beam (LB) being amplified so as to intersect the set movement route (L1).
B23K 26/348 - Working by laser beam, e.g. welding, cutting or boring in combination with welding or cutting covered by groups , e.g. in combination with resistance welding in combination with arc heating, e.g. TIG [tungsten inert gas], MIG [metal inert gas] or plasma welding
B23K 9/16 - Arc welding or cutting making use of shielding gas
The present invention is characterized by including: a superimposing step in which a front surface (1b) of a first metal member (1) and a back surface (2c) of a second metal member (2) are superimposed; and a welding step in which the first metal member (1) and the second metal member (2) are hybrid-welded together using a hybrid welding machine having a leading laser welding unit (20) and a following arc welding unit. The present invention is also characterized in that in the welding step, laser welding and arc welding are performed by projecting a laser beam (LB) to an inner corner section (U) formed by the front surface (1b) of the first metal member (1) and an end face (2a) of the second metal member (2), along a set movement route (L1) set in the inner corner section (U), and the laser beam (LB) is oscillated so as to cross the set movement route (L1).
B23K 26/348 - Working by laser beam, e.g. welding, cutting or boring in combination with welding or cutting covered by groups , e.g. in combination with resistance welding in combination with arc heating, e.g. TIG [tungsten inert gas], MIG [metal inert gas] or plasma welding
B23K 9/16 - Arc welding or cutting making use of shielding gas
NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY (Japan)
Inventor
Sugita, Kaoru
Oota, Yuji
Abe, Rene Yo
Hachisu, Takuma
Matsunaga, Takehiro
Abstract
This sodium borohydride is produced, in a closed container filled with hydrogen gas, by mixing sodium borates, aluminum powder and fluoride powder, and performing a reaction at 410°C-560°C.
NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY (Japan)
Inventor
Sugita, Kaoru
Oota, Yuji
Abe, Rene Yo
Hachisu, Takuma
Matsunaga, Takehiro
Abstract
Provided is a method for producing sodium borohydride, in which a sodium borate and aluminum powder are reacted at 400°C to 560°C while being stirred in a sealed container filled with hydrogen gas, such that the molar ratio of sodium contained in the sodium borate to boron contained in the sodium borate exceeds 0.5.
NIKKEIKIN ALUMINIUM CORE TECHNOLOGY COMPANY LTD. (Japan)
Inventor
Kanamori, Keiji
Nomura, Shinichi
Moriyama, Yoshihiko
Sode, Takayuki
Sugiyama, Yukinori
Abstract
A cell case provided with a safety valve (4) in which a breakage groove (45) is used, wherein in order to stabilize the operation pressure, a lid (2) of the cell case has formed thereon: a thin plate portion (30) obtained by thinning a plate part (3); and a first recessed part (40) comprising a curved part (44) in which the thin plate portion (30) is indented inward, with respect to the case, in a curved shape. The breakage groove (45) for the safety valve (4) is formed at the bottom part (440) of the curved part (44). A first connecting portion (46) and a second connecting portion (47) of the plate part (3), which connect to the curved part (44) on both sides flanking the curved part (44), are at positions protruding toward the outside of the case from the plate part (3).
It is an objective of the present invention to provide a battery case lid and a manufacturing method for the battery case lid which inhibit work hardening of a metal plate workpiece and which facilitate manufacture of a battery case lid. Provided is a battery case lid (1) formed by working a metal plate, including: a substrate section (2) and an explosion-proof valve (4) formed in the substrate section (2), wherein the explosion-proof valve (4) has a reduced thickness section (41) thinner than the substrate section (2), and the reduced thickness section (41) is formed by extending the metal plate by applying pressure while the metal plate is kept unrestrained.
An aluminum alloy sheet for motor vehicles excellent in press formability, resistance to surface roughening and shape fixability is produced without subjecting the sheet to stabilization treatment by casting a melt, containing 3.0-3.5 mass% Mg, 0.05-0.3 mass% Fe, 0.05-0.15 mass% Si, and further a limited amount of less than 0.1 mass% Mn, a balance substantially being inevitable impurities and Al, into a thin slab having a thickness of to 15 mm in a twin-belt caster so that the cooling rate at 1/4 depth of the thickness of the thin slab is 20 to 200°C/sec; winding the cast thin slab into a coil; subjecting the coiled thin slab to cold rolling with a roll having a surface roughness of 0.2 to 0.7 µm Ra at a cold rolling reduction of 50 to 98%; subjecting the cold rolled thin sheet to final annealing either continuously in a CAL at a holding temperature of 400 to 520°C or in a batch annealing furnace at a holding temperature of 300 to 400°C; and then subjecting the resulting sheet to straightening with a leveler.
C22C 21/06 - Alloys based on aluminium with magnesium as the next major constituent
B21B 1/22 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling bands or sheets of indefinite length
B21B 3/00 - Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences
B22D 11/06 - Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
B22D 11/124 - Accessories for subsequent treating or working cast stock in situ for cooling
C22F 1/047 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with magnesium as the next major constituent
8.
ALUMINUM ALLOY FIN MATERIAL FOR HEAT EXCHANGER, PROCESS FOR MANUFACTURING THE SAME, AND PROCESS FOR MANUFACTURING HEAT EXCHANGER THROUGH BRAZING OF THE FIN MATERIAL
An aluminum alloy fin material for a heat exchanger having suitable strength before brazing enabling easy fin formation, having high strength after brazing, having a high thermal conductivity (electrical conductivity) after brazing, and having superior sag resistance, erosion resistance, self corrosion prevention, and sacrificial anode effect, a method of production of the same, and a method of production of a heat exchanger using the fin material are provided, that is, an aluminum alloy fin material having a chemical composition of Si: 0.7 to 1.4 wt%, Fe: 0.5 to 1.4 wt%, Mn: 0.7 to 1.4 wt%, and Zn: 0.5 to 2.5 wt%, Mg as an impurity limited to 0.05 wt% or less, and the balance of unavoidable impurities and A1, and having a tensile strength after brazing of 130 MPa or more, a yield strength after brazing of 45 MPa or more, a recrystallized grain size after brazing of 500 µm or more, and an electrical conductivity after brazing of 47% IACS or more, a method of producing an aluminum alloy fin material comprising cold rolling/annealing/cold rolling/annealing/cold rolling a thin slab continuously cast by a twin-belt system from a melt of the above composition under predetermined conditions, and a method of production of a heat exchanger comprising cooling the fin material at a predetermined rate after brazing heating.
C22F 1/053 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with zinc as the next major constituent
C22F 1/00 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
9.
ALUMINUM ALLOY SHEET AND METHOD FOR MANUFACTURING THE SAME
An aluminum alloy sheet is manufactured by preparing a slab having a thickness of 5 to 15 mm with a continuous casting machine by a continuous casting process using molten alloy containing 0.40% to 0.65% of Mg, 0.50% to 0.75% of Si, 0.05% to 0.20% of Cr, and 0.10% to 0.40% of Fe, the remainder being Al, those components being essential elements optionally up to 0.15% Cu, 0.10% Ti; ; winding the slab into a coil; hot-rolling or directly coiling up the slab; cold-rolling the resulting slab into a sheet; subjecting the resulting sheet to solution heat treatment with a continuous annealing furnace; and then pre-aging the resulting sheet. The aluminum alloy sheet has the same composition as that of the molten alloy and has a grain size of 10 to 25 µm. Although the aluminum alloy sheet is superior in bake hardenability, bendability, and surface quality (orange peel), that is, the aluminum alloy sheet has high quality, tAn aluminum alloy sheet is manufactured by preparing a slab having a thickness of 5 to 15 mm with a continuous casting machine by a continuous casting process using molten alloy containing 0.40% to 0.65 of Mg, 0.50% to 0.75% of Si, 0.05% to 0.20% of Cr, and 0.10% to 0.40% of Fe, the remainder being Al, those components being essential elements, winding the slab into a coil; hot-rolling or directly coiling up the slab; cold- rolling the resulting slab into a sheet; subjecting the resulting sheet to solution heat treatment with a continuous annealing furnace; and then pre-aging the resulting sheet. The aluminum alloy sheet has the same composition as that of the molten alloy and has a grain size of 10 to 25 µm. Although the aluminum alloy sheet is superior in bake hardenability, bendability, and surface quality (orange peel), that is, the aluminum alloy sheet has high quality, the sheet can be manufactured with low cost.
C22C 21/08 - Alloys based on aluminium with magnesium as the next major constituent with silicon
C22C 21/02 - Alloys based on aluminium with silicon as the next major constituent
C22F 1/05 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys of the Al-Si-Mg type, i.e. containing silicon and magnesium in approximately equal proportions
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