Abstract: There is provide a liquid-cooled integrated substrate which has reduced material cost and processing cost, is reduced in warpage (shape deformation) as an integrated substrate, and has excellent strength and heat radiation performance, and a manufacturing method of the liquid-cooled integrated substrate. There is provided a liquid-cooled integrated substrate 1 in which a metal circuit board 15 made of aluminum or an aluminum alloy is bonded to one surface of a ceramic substrate 10, one surface of a plate-like metal base plate 20 made of aluminum or an aluminum alloy is bonded to another surface of the ceramic substrate 10, and a liquid-cooling type radiator 30 composed of an extrusion material is bonded to another surface of the metal base plate 20, wherein a relation between a thickness t1 of the metal circuit board 15 and a thickness t2 of the metal base plate 20 satisfies t2/t1?2 where the thickness t1 of the metal circuit board 15 is 0.4 to 3 mm and the thickness t2 of the metal base plate 20 is 0.

Abstract: There is provide a manufacturing method of a fin-integrated substrate capable of producing by simple process a fin-integrated substrate with heat radiating fins at fine pitches by a processing method in which warpage of a metal base plate and corrugation (wavy shape) of the heat radiating fins are suppressed. There is provided a manufacturing method of a fin-integrated substrate in which bonding of the metal circuit board to the ceramic substrate is performed by a molten metal bonding method, and formation of the plurality of heat radiating fins at a cut part that is a part of the metal base plate is performed by fixing by a jig to apply a tensile stress on a surface of the cut part where the heat radiating fins are to be formed, and performing grooving processing of forming a plurality of grooves by moving a multi-cutter composed of a plurality of stacked disc-shaped cutters, on the surface to which the tensile stress is applied, while rotating the multi-cutter.

Abstract: Provided is a mixed aluminum hydroxide powder suitable as a filler to be filled into a resin or the like, particularly suitable in an application where the filler is desired to be filled in a large amount, and enabling the production of a molded article excellent in strength properties. The mixed aluminum hydroxide powder is obtained by mixing an aluminum hydroxide powder X having an average secondary particle diameter in the range of 5 to 16 ?m and a shape coefficient of 4 or less, and an aluminum hydroxide powder Y having an average secondary particle diameter in the range of 0.5 to 2.0 ?m and a shape coefficient of 4 or less, the mixed aluminum hydroxide powder being adjusted so as to have an average secondary particle diameter in the range of 0.9 to 12 ?m.

Abstract: A heat exchanger use high strength aluminum alloy fin material having a high strength and excellent in thermal conductivity, erosion resistance, sag resistance, sacrificial anodization effect, and self corrosion resistance, characterized by containing Si: 0.8 to 1.4 wt %, Fe: 0.15 to 0.7 wt %, Mn: 1.5 to 3.0 wt %, and Zn: 0.5 to 2.5 wt %, limiting the Mg as an impurity to 0.05 wt % or less, and having a balance of ordinary impurities and Al in chemical composition, having a metal structure before brazing of a fibrous crystal grain structure, a tensile strength before brazing of not more than 240 MPa, a tensile strength after brazing of not less than 150 MPa, and a recrystallized grain size after brazing of 500 ?m or more.

Abstract: A method of welding includes a first primary welding step of carrying out a friction stir welding on the abutting portion of metal members from a first surface of a metal member. In a second primary welding step, the abutting portion is friction stir welded from the reverse face side of the member, while penetrating a stirring pin of rotation tool in a plasticized region formed in the first primary welding step.

Abstract: The present invention provides an economic rotation tool for joining a pair of metal members which form an inner corner by abutting the pair of metal members (1) each other, and a joining inner corner method using the same. The rotation tool for joining the pair of metal members which form an inner corner (1) by abutting the pair of metal members each other to perform friction stir welding on an inner corner portion formed by abutting a pair of metal members against each other comprising: a stirring pin (3) to be inserted into the inner corner portion; and a base block (2) supporting the stirring pin (3) and to be brought into contact with one and the other of the pair of metal members respectively, wherein the base block (2) includes: a body portion (4) having a taper shape; and a shoulder portion (5) formed detachably at a tip of the body portion, and the body portion (4) and the shoulder portion (5) are penetrated by the stirring pin (3).

Abstract: A heat exchanger use high strength aluminum alloy fin material having a high strength and excellent in thermal conductivity, elusion resistance, sag resistance, sacrificial anodization effect, and self corrosion resistance, characterized by containing Si: 0.8 to 1.4 wt %, Fe: 0.15 to 0.7 wt %, Mn: 1.5 to 3.0 wt %, and Zn: 0.5 to 2.5 wt %, limiting the Mg as an impurity to 0.05 wt % or less, and having a balance of ordinary impurities and Al in chemical composition, having a metal structure before brazing of a fibrous crystal grain structure, a tensile strength before brazing of not more than 240 MPa, a tensile strength after brazing of not less than 150 MPa, and a recrystallized grain size after brazing of 500 ?m or more.

Abstract: An aluminum alloy casting material for heat conducting is provided, wherein the thermal conductivity is improved of an aluminum alloy casting material whereof the castability is improved by the addition of silicon where said invention is characterized by being an aluminum alloy casting material with excellent thermal conductivity, comprising 5-10.0% by mass of silicon, 0.1-0.5% by mass of magnesium and the remainder comprising aluminum and inevitable impurities, and whereon aging treatment has been performed.

Abstract: A double floor structure capable of being adapted to the conditions of construction and the needs of users at low cost. A double floor structure (K) provided with support legs (1) which are provided on a lower floor and rows of beams which form an upper floor. The support legs (1) are each provided with an upper member (14) which supports a beam from the lower side, an intermediate member (13) which supports the upper member (14) from the lower side, and a lower member (12) which supports the intermediate member (13) from the lower side. The upper member (14), the intermediate member (13), and the lower member (12) consist of metallic, extruded shape material and are disposed in such a manner that the direction of the extrusion is aligned with the top-bottom direction.

Abstract: There is provided a twin-belt casting machine which prevents an uneven cooling condition between the top surface and the bottom surface of a slab between a pair of endless belts disposed vertically. The twin-belt casting machine 1 comprises a pair of rotating belt units 3 including respective endless belts 2 and arranged up and down so as to face each other, a cavity 4 formed between the pair of rotating belt units 3, and cooling means 10 which is arranged inside the rotating belt unit 3. The twin-belt casting machine 1 continuously casts a slab S as a metal liquid is supplied in the cavity 4. The twin-belt casting machine 1 further comprises distance adjusting means which is arranged inside at least one of the pair of rotating belt units arranged up and down so as to face each other, and which moves apart or closer the endless belt relative to the slab S in accordance with a part where the slab and the endless belt become distant from each other.

Abstract: A method of automatically counting a number of inclusions by eliminating the effects of shrinkage cavities in the conventional method and securing a high correlation with a value measured by a skilled worker and a casting mold for obtaining a cast sample used for the same are provided. A method of measurement of a number of nonmetallic inclusions comprising capturing an image of a rectangular fracture surface of a cast sample consisting of an aluminum alloy by a CCD camera or other image capturing means, processing the image captured by the image capturing means for color density, digitalizing the processed image by a predetermined threshold value, and counting the number of pixel clusters of a predetermined size or more, the method characterized by detecting the end edges of the short sides of the rectangular fracture surface before the capturing of its image and automatically setting measurement regions of an area of ¼ to ? of the area of the fracture surface at the two ends of the fracture surface.

Abstract: [PROBLEMS] To provide an aluminum alloy fin material for a heat exchanger, which has high strength and high heat conductivity after brazing, and is excellent in the resistance to sagging, erosion and self-corrosion and the in the sacrificial anode effect. [MEANS FOR SOLVING PROBLEMS] A method for producing an aluminum alloy fin material for a heat exchanger which comprises providing a molten aluminum alloy having a chemical composition, in wt %, that Si: 0.5 to 1.5%, Fe: 0.15 to 1.00%, Mn: 0.8 to 3.0%, Zn: 0.5 to 2.5%, with the proviso that the content of Mg as an impurity is limited to 0.05 wt % or less, and the balance: Al and inevitable impurities, casting the molten alloy continuously into a thin slab having a thickness of 5 to 10 mm by the use of a twin belt casting machine, winding up the slab into a roll, cold-rolling the slab into a sheet having a thickness of 0.05 to 2.0 mm, subjecting the sheet to an inter annealing at 350 to 500° C.

Abstract: Provided is a process for producing a high-purity ?-alumina in which an Si content, an Fe content, a Ca content, and an Na content are simultaneously removed. The high-purity ?-alumina is produced by burning aluminum hydroxide having an Na content of 0.11 mass % or less, an Fe content of 6 ppm or less, a Ca content of 1.5 ppm or less, and an Si content of 10 ppm or less as impurities in terms of alumina respectively, and having an average particle diameter of 55 ?m or less at a burning temperature of 1,100 to 1,500° C. by using a burning vessel containing Al2O3 in a range of 85 to 93 wt % and SiO2 in a range of 7 to 14 wt % and subjecting the obtained ?-alumina to wash treatment.

Abstract: [PROBLEMS] To provide an aluminum alloy fin material for a heat exchanger, which has high strength and high heat conductivity after brazing, and is excellent in the resistance to sagging, erosion and self-corrosion and the in the sacrificial anode effect. [MEANS FOR SOLVING PROBLEMS] A method for producing an aluminum alloy fin material for a heat exchanger which comprises providing a molten aluminum alloy having a chemical composition, in wt %, that Si: 0.5 to 1.5%, Fe: 0.15 to 1.0%, Mn: 0.8 to 3.0%, Zn: 0.5 to 2.5%, with the proviso that the content of Mg as an impurity is limited to 0.05 wt % or less, and the balance: Al and inevitable impurities, casting the molten alloy continuously into a thin slab having a thickness of 5 to 10 mm by the use of a twin belt casting machine, winding up the slab into a roll, cold-rolling the slab into a sheet having a thickness of 0.05 to 2.0 mm, subjecting the sheet to an inter annealing at 350 to 500° C.

Abstract: Provided is a method of producing a liquid-cooled jacket wherein deformation of a seal body can be minimized.

Abstract: When aluminum alloy billet obtained by continuously casting molten aluminum alloy in the shape of rod is cut into a predetermined length by means of a cutting device, and then the aluminum alloy billet thus cut is loaded into a product carrier container with an identification mark that has been made, the casting condition and inspection results of the aluminum alloy billet are stored in the storage unit of a production control device in association with the identification mark so as to stabilize the quality and production of the aluminum alloy billet used for machining materials.

Abstract: Means for overcoming the problems which the conventional glass microchannel chips have are disclosed. That is, a microchannel chip in which microchannels can be formed at a low cost, and which has a high chemical resistance is disclosed. The microchannel chip is constituted by a substrate made of carbon, which has a channel in its surface; and a cover composed of a glass plate bonded to the substrate. The cover is bonded to the substrate by heating at least a part of the contact surface at which the substrate is in contact with the cover.

Abstract: A method of production of an aluminum alloy inhibiting oxidation loss of the alloy melt without the use of Be which is liable to affect the human health. When preparing an aluminum alloy melt containing Mg, the method adds to the alloy, Ca, Sr, and/or Ba in a composition ratio within a range enclosed by lines connecting four points illustrated in FIG. 1 of a point A (Ca: 18 at %, Sr: 0 at %, and Ba: 82 at %), point B (Ca: 14 at %, Sr: 34 at %, and Ba: 52 at %), point C (Ca: 33.8 at %, Sr: 66.2 at %, and Ba: 0 at %), point D (Ca: 100 at %, Sr: 0 at %, and Ba: 0 at %) and excluding point D so as to adjust the Ca, Sr, and Ba components in the melt to include Ca: 0.001 to 0.5 mass % and one or both of Sr: 0.01 to 2.8 mass % and Ba: 0.01 to 7.83 mass %.

Abstract: High strength aluminum alloy sheet having superior surface roughening and formability suitable for home electrical appliances and automobile outer panels and other structural materials and a method of production of the same are provided. High strength aluminum alloy sheet having a chemical composition containing Mg: 2.0 to 3.3 mass %, Mn: 0.1 to 0.5 mass %, and Fe: 0.2 to 1.0 mass %, having a balance of unavoidable impurities and Al, and having an Si among the unavoidable impurities of less than 0.20 mass % and having an average circle equivalent diameter of intermetallic compounds of 1 ?m or less, having an area ratio of intermetallic compounds of 1.2% or more, having an average diameter of recrystallized grains of 10 ?m or less, and having a tensile strength of 220 MPa or more.

Abstract: A heat exchanger use high strength aluminum alloy fin material having a high strength and excellent in thermal conductivity, erosion resistance, sag resistance, sacrificial anodization effect, and self corrosion resistance, characterized by containing Si: 0.8 to 1.4 wt %, Fe: 0.15 to 0.7 wt %, Mn: 1.5 to 3.0 wt %, and Zn: 0.5 to 2.5 wt %, limiting the Mg as an impurity to 0.05 wt % or less, and having a balance of ordinary impurities and Al in chemical composition, having a metal structure before brazing of a fibrous crystal grain structure, a tensile strength before brazing of not more than 240 MPa, a tensile strength after brazing of not less than 150 MPa, and a recrystallized grain size after brazing of 500 ?m or more.