This invention provides a joint product between a steel product and an aluminum material, which can realize spot welding with high bonding strength, and a spot welding method for the joint product. In one embodiment, a steel product (1) having a sheet thickness t1 of 0.3 to 3.0 mm is joined to an aluminum material (2) having a sheet thickness t2 of 0.5 to 4.0 mm by spot welding to form a joint product between the steel product and the aluminum material. The joint product is characterized in that the nugget area in the joint is 20 × t20.5 to 100 × t20.5 mm2, the area of a part where the thickness of an interface reaction layer is 0.5 to 3 µm, is not less than 10 × t20.5 mm2, and the difference in thickness of the interface reaction layer between the joint center and a point distant from the joint center by a distance of one-fourth of the joint diameter DC is not more than 5 μm. The above constitution can provide a high-bonding strength joint product, between dissimilar materials, which can be formed without newly using other materials such as clad materials and without newly adding a separate step using an existing spot welding apparatus at low cost, and a spot welding method.

Joint product between steel product and aluminum material, spot welding method for the joint product, and electrode chip for use in the joint product

The invention provides for a fully electrically rechargeable metal anode battery systems and methods of achieving such systems. An electrically rechargeable metal anode cell may comprise a metal electrode, an air contacting electrode, and an aqueous electrolyte separating the metal electrode and the air contacting electrode. In some embodiments, the metal electrode may directly contact the liquid electrolyte and no separator or porous membrane is needed between the air contacting electrode and the electrolyte. Rechargeable metal anode cells may be electrically connected to one another through a centrode connection where a metal electrode of one cell and an air contacting electrode of a second cell are electrically connected. Air tunnels or pathways may be provided between individual metal anode cells arranged in a stack. In some embodiments, an electrolyte flow management system may also be provided to maintain liquid electrolyte at constant levels during charge and discharge cycles.

Electrically rechargeable, metal anode cell and battery systems and methods

Disclosed is a technique for securily integrating a galvanized steel sheet and a molded resin article. A galvanized steel sheet 'Z18' is immersed in an aqueous aluminum-degreasing solution heated to a temperature of 75℃ for seven minutes to form a surface with roughness such that the RSm is 0.8−2.3μm and the Rz is 0.3−1.0μm. The galvanized steel sheet surface is also covered with convex protrusions with diameters of approximately 100nm, and a chromate-treated layer, thus fulfilling three conditions ideal for bonding. The surface is sprayed with a resin composition including 70−97 mass% of a polyphenylene sulfide and 3−30 mass% of a polyolefin resin. The resin composition infiltrates the ultrafine concavities and hardens to create a securily integrated composite body of a galvanized steel sheet and a molded resin article. The composite body has an extremely high shear/rupture strength of over 20MPa.

Bonded body of galvanized steel sheet and adherend, and manufacturing method therefor

The invention relates generally to welding and, more specifically, to welding wires for arc welding, such as Gas Metal Arc Welding (GMAW) or Flux Core Arc Welding (FCAW). In one embodiment, a tubular welding wire includes a sheath and a core. Further, the core includes a carbon source and an agglomerate having a Group I or Group II compound, silicon dioxide, and titanium dioxide. Additionally, the carbon source and the agglomerate together comprise less than 10% of the core by weight.

Systems and methods for welding electrodes

A process for the production of special effect multi-layer coatings, comprising the successive steps: (1) applying a 10 to 30 μm thick base coat layer onto a substrate provided with an EDC primer, (2) applying a clear coat layer onto the base coat layer, (3) jointly curing the base coat and clear coat layers, wherein the base coat layer is applied in a first layer and in a second layer; the first layer comprises a modified water-borne base coat produced by mixing an unmodified water-borne base coat with an admixture component and the second layer comprises the unmodified water-borne base coat, wherein the unmodified water-borne base coat has a ratio by weight of pigment content to resin solids content of 0.05:1 to 0.6:1 and wherein the pigment content of the unmodified water-borne base coat comprises at least one metal flake pigment having a thickness of 10 to 100 nm corresponding to a proportion of 0.1 to 5 wt. %, relative to the resin solids content of the unmodified water-borne base coat and at least one additional special effect pigment and wherein the composition of the pigment content is such that the UV light transmission through the base coat layer formed of the first and second layers is less than 0.1% in the wavelength range of from 290 to 380 nm and less than 0.5% in the wavelength range of from 380 to 400 nm.

Process for the production of multi-layer coatings

A flux-cored wire for different-material bonding which, when used for bonding an aluminum-based material to an iron-based material, heightens the bonding strength and has satisfactory welding efficiency; a method of bonding different materials; and a joint obtained by the method. In particular, the method is for use in the fusion welding of a high-tension steel material to a 6000-series aluminum alloy material, which are high-strength different materials, and in the bonding of a zinc-plated steel material. One embodiment employs a flux-cored wire comprising an aluminum sheath and a flux with which the inside of the sheath is filled, wherein the flux is a fluoride composition containing a specific amount of AlF3 and containing no chloride and the sheath comprises an aluminum alloy containing 1-13 mass% silicon. Use of such flux-cored wire in the fusion welding of a high-tension steel material to a 6000-series aluminum alloy material, which are high-strength different materials, gives a high bonding strength.

Flux-cored wire for different-material bonding and method of bonding different materials

The purpose is to provide a joined body of dissimilar materials comprising steel material and aluminum material, which can be obtained by spot welding with high joining strength; and a spot welding method therefor. A joined body (3) is obtained by spot welding a particular thick steel material (1) and an aluminum material (2). The area of a nugget (5) in a spot weld is determined in relation to the plate thickness of the aluminum material (2). The area of the portion of a boundary reaction layer (6) having a thickness of 0.5-10 μm in the nugget (5) is determined in relation to the plate thickness of the aluminum material (2), and high joining strength is obtained.

Joined body of dissimilar materials comprising steel material and aluminum material, and joining method therefor

PROBLEM TO BE SOLVED: To provide a joined body of a steel material and an aluminum material which is formed by spot welding and has a high joining strength, and also to provide a method for spot welding the same. SOLUTION: The joined body 3 of different materials is formed of the steel material 1 and the aluminum material 2 joined to the steel material through spot welding. The steel material 1 contains 0.1-3.0 wt.% Mn and has a sheet thickness t 1 of 0.3-2.5 mm. The aluminum material 2 contains 0.4-2 wt.% Si and has a sheet thickness t 2 of 0.5-2.5 mm. A plating film 4 made of Zn and/or Al having a film thickness of 3-15 μm and a melting point of 350-950°C is preliminarily formed on a surface of the steel material 1 or the aluminum material 2. A nugget diameter in the spot welding is within a range of 4×t 2 0.5 to 7×t 2 0.5 in relation to the sheet thickness t 2 . COPYRIGHT: (C)2006,JPO&NCIPI

Joined body of different materials of steel material and aluminum material and method for joining the same

A resin film is formed on the surface of a hot dip galvanized steel sheet by applying emulsion of a polyolefin copolymer resin molecular-associated by ion cluster to the steel sheet surface. The resin film contains, in terms of solids content, 10 to 55 mass % of silica particles, 1 to 8 mass % of a crosslinking agent, and 1 to 8 mass % of tannic acid and/or ammonium vanadate. The resin-coated hot dip galvanized steel sheet is capable of exhibiting well-balanced superior characteristics in weldability, corrosion resistance, and machinability.

Resin-coated hot dip galvanized steel sheet superior in weldability and corrosion reistance and method for producing the same

PROBLEM TO BE SOLVED: To provide an air secondary battery which does not deteriorate an electrolytic solution, does not lower a voltage, and can obtain high voltage. SOLUTION: The air secondary battery is equipped with an air diffusion electrode (positive electrode) 4, a negative electrode 2 arranged opposing the air diffusion electrode 4, and the electrolytic solution 3 arranged between the air diffusion electrode 4 and the negative electrode 2. The negative electrode 2 includes a liquid alloy material having gallium based metal and a metal element of which the standard electrode potential is lower than that of gallium. COPYRIGHT: (C)2010,JPO&INPIT

Hidekazu Ido

Papers

Flux-cored wire for different-material bonding and method of bonding different materials

Joined body of dissimilar materials comprising steel material and aluminum material, and joining method therefor

Joined body of different materials of steel material and aluminum material and method for joining the same

Resin-coated hot dip galvanized steel sheet superior in weldability and corrosion reistance and method for producing the same

Air secondary battery