Sumitomo Light Metal Industries Ltd.

Nagoya-shi, Japan

Sumitomo Light Metal Industries Ltd.

Nagoya-shi, Japan
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Patent
Sumitomo Light Metal Industries Ltd. | Date: 2013-06-27

Providing a raised and recessed sheet material having extremely high stiffness, and useful vehicle panel and laminated structure using the same. The surface of the sheet is formed by a plurality of imaginary squares arranged in two mutually perpendicular directions, and has a raised and recessed pattern. A basic configuration A, where first regions M and a Z-shaped second region N are formed in the imaginary square, and basic configurations B to D derived from the basic configuration A are butted together at their peripheral edges such that first regions M having those peripheral edges are butted together and the second regions N having those peripheral edges are butted together. The raised and recessed pattern is formed by upwardly raising the first regions M and downwardly recessing the second regions N, or upwardly raising or downwardly recessing either one or both of the first and second regions M and N.


Patent
Sumitomo Light Metal Industries Ltd. | Date: 2013-04-10

A method for producing an aluminum alloy heat exchanger includes applying a coating material prepared by mixing an Si powder, a flux powder, and a binder to a surface of a multiport flat refrigerant tube, assembling an aluminum alloy bare fin with the multiport flat refrigerant tube, and brazing the multiport flat refrigerant tube and the aluminum alloy bare fin to obtain an aluminum alloy heat exchanger, the multiport flat refrigerant tube being formed of an aluminum alloy extruded material that includes 0.5 to 1.7 mass% of Mn, less than 0.10 mass% of Si, and less than 0.10 mass% of Cu, with the balance being Al and unavoidable impurities, the aluminum alloy bare fin being a corrugated fin that is obtained by forming an Al-Mn-Zn alloy material, the coating material being prepared by mixing an Si powder, a Zn-containing compound flux powder, a Zn-free compound flux powder, and a binder, the Si powder being applied in an amount of 1 to 4 g/m^(2), and the aluminum alloy heat exchanger obtained by brazing having a configuration in which a deep area of the refrigerant tube has the highest potential, and the potential decreases in order from a surface area of the refrigerant tube, a fin joint fillet, and the fin.


An aluminum alloy heat exchanger is produced by applying a coating material that is prepared by adding a binder to a mixture of an Si powder and a Zn-containing compound flux powder to a surface of an aluminum alloy refrigerant tube, assembling a bare fin that is formed of an AlMnZn alloy with the refrigerant tube, and brazing the refrigerant tube and the bare fin by heating in an atmosphere-controlled furnace, the refrigerant tube being an extruded product of an aluminum alloy that comprises 0.5 to 1.7% (mass %, hereinafter the same) of Mn, less than 0.10% of Cu, and less than 0.10% of Si, with the balance being Al and unavoidable impurities.


Patent
Sumitomo Light Metal Industries Ltd. | Date: 2013-05-22

A sheet material 1 that has a concave-convex part 20 is provided. Using a first reference plane K1, a second reference plane K2, and an intermediate reference plane K3 as a reference, boxes, which are partitioned by a lattice that longitudinally and laterally divides a unit area 23 disposed in the intermediate reference plane K3 into n equal parts, are categorized into first boxes 231 and second boxes 232. The areas in which the first boxes 231 are linked serve as first reference areas 213, and the areas in which the second boxes 232 are linked serve as second reference areas 223. First areas 21, which protrude from the first reference areas 213 toward the first reference plane K1, and second areas 22, which protrude from the second reference areas 213 toward the second reference plane K2, are provided. Each of the first areas comprises a first top surface 211 and first side surfaces 212. Each of the second areas comprises a second top surface 221 and second side surfaces 221.


Patent
Sumitomo Light Metal Industries Ltd. | Date: 2016-10-07

A method of joining heat-treatable aluminum alloy members by friction stir welding, including the steps of: a T4-treatment-performing step of performing a T4 treatment on heat-treatable aluminum alloy members so as to impart T4 temper to the heat-treatable aluminum alloy members; a joining step of joining the heat-treatable aluminum alloy members with T4 temper by friction stir welding to provide a joined product; and a reversion-treatment-performing step of performing a reversion treatment, the reversion-treatment-performing step being carried out prior to or after the joining step.


Patent
Sumitomo Light Metal Industries Ltd. | Date: 2013-09-28

A high-strength aluminum alloy extruded material contains Si: 0.70 to 1.3 mass %; Mg: 0.45 to 1.2 mass %; Cu: 0.15 to less than 0.40 mass %; Mn: 0.10 to 0.40 mass %; Cr: more than 0 to 0.06 mass %; Zr: 0.05 to 0.20 mass %; Ti: 0.005 to 0.15 mass %, Fe: 0.30 mass % or less; V: 0.01 mass % or less; the balance being Al and unavoidable impurities Crystallized products in the alloy have a particle diameter of a is 5 m or less. Furthermore, an area ratio of a fibrous structure in a cross section parallel to an extruding direction during hot extrusion is 95% or more.


An aluminum alloy sheet exhibits excellent surface quality after anodizing without showing a band-like streak pattern. The aluminum alloy sheet is a 5000 series aluminum alloy sheet that includes 1.0 to 6.0 mass% of Mg, wherein the concentration of Mg in a solid-solution state that is present in an outermost surface area of the aluminum alloy sheet varies in the widthwise direction of the aluminum alloy sheet in the form of a band having a width of 0.05 mm or more, and the difference in the concentration of Mg between adjacent bands is 0.20 mass% or less.


Patent
Sumitomo Light Metal Industries Ltd. | Date: 2013-01-23

An aluminum alloy material, which is an aluminum alloy welded component that is welded by forming a welded section by friction stir welding, contains Mg: 0.3-6.0% (mass%, hereinafter the same), Cu: 0.2% or less, Si: 0.1% or less, Fe: 0.1% or less, the balance being Al and inevitable impurities, second phase particles having a grain size of 5 m or less when observed with an optical microscopic are dispersed in the aluminum alloy; because the second phase particles are homogeneously dispersed in a welded section equivalent portion of the aluminum alloy welded component areas as compared to other portions, variations of pit formation caused by etching are reduced, and it is possible to eliminate color tone variations in an anodized coating.


First and second aluminum alloy materials, each comprised of a 5000-series aluminum alloy containing second phase particles having a diameter less than 5 m in a distribution density of less than or equal to 10,000 second phase particles/mm^(2), are welded together by abutting portions of the first and second aluminum alloy materials, and friction stir welding along the abutted portions to form an integrally-welded aluminum alloy panel. The friction stir welding is performed using a tool (8) having a shoulder (10) under the following conditions: (i) the shoulder (10) of the tool (8) has a diameter (d) in the range of 3 mm d 8 mm and (ii) the revolution number (r) of the tool (8) is 6 < r 20, wherein r is tool revolutions/length of the weld (4) in millimeters.


Patent
Sumitomo Light Metal Industries Ltd. | Date: 2013-01-25

A double pipe for a heat exchanger includes an inner pipe having a plurality of spiral projections extending radially outward from an outer peripheral surface of the inner pipe. An outer pipe is disposed around the inner pipe. At least an inner peripheral surface of the outer pipe is at least substantially smooth and has an at least substantially circular cross section. The inner peripheral surface of the outer pipe contacts all of the projections of the inner pipe so as to define a plurality of peripherally-separated, outer flow paths between the inner pipe and the outer pipe. Fluid flowing within an inner flow path defined by the inner pipe exchanges heat with fluid flowing through the outer flow paths. Furthermore, an inscribed circle of the inner pipe has a first diameter (d1), an inscribed circle of the outer pipe has a second diameter (d2), and 0.6

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