Showa Aluminum Corporation

Other

Honda Motor Co., Ltd.

Showa Denko K.k.

Showa Aluminum Kabushiki Kaisha

Yasuhiro Osame

Shoichi Sato

Hiroki Sakamoto

Kenji Suzuki

Takenori Hashimoto

Kenji Tsushima

Masakazu Furuta

Daishi Tanaka

Seiji Tazaki

Kazuyuki Takahashi

Satoko Arai

Shuichi Murooka

A tubular metal bodycomprises a tubeextruded through a porthole die and composed of a plurality of componentsjoined to one another with a plurality of joint portionsextending over the entire length of the tube. The base material metal of the extruded tubein each of the joint portionsis subjected to a modifying treatment to produce finely divided crystal grains. The modifying treatment for the extruded tubeis conducted preferably by frictionally agitating each joint portion using a probeof a friction agitation joining tool. The tubular metal bodyis available with an increased length in a larger size and has high pressure resistance.

Tubular metal body, method of producing same, liner for pressure vessel and method of producing same

A filler wire for laser-welding an aluminum alloy is described, which comprises a base material of Aluminum-Silicon based alloy and a flux of Aluminum-Potassium-Fluorine-based composition. The amount of the flux in the base material is greater than 0 (zero) wt. % and less than approximately 1.0 wt. %.

Filler wire for laser-welding aluminum alloy member, method of welding aluminum alloy member by using the filler wire, and welded-aluminum alloy member produced by using the filler wire

A process for producing a flat heat exchange tube having opposed upper and lower walls and a plurality of reinforcing walls connected by brazing between the respective upper and lower walls for dividing the tube interior into parallel fluid passages. In order to strengthen the brazed connection between the reinforcing walls and the lower surface of the upper wall and to prevent the creation of a clearance space therebetween, the lower surface of the upper wall is provided in advance with longitudinally extending ridges with which the upper surfaces of the reinforcing walls come in contact to eliminate the clearances and thus insure the existence of a continuous brazed connection between each reinforcing wall and lower surface of the upper wall.

Process for producing flat heat exchange tubes

An aluminum alloy brazing agent containing a flux is made by compacting a powder mixture of a matrix powder and a flux powder at a first temperature so as to form a rigid piece, and then conducting a secondary forming of the rigid piece into a desired shape at a second temperature. The first temperature is lower than 480.degree. C., preferably lower than 400.degree. C., and more preferably room temperature, so that the compacting may be conducted in the air. The second temperature is 300.degree.-575.degree. C. for the secondary forming, which also may preferably be conducted in an non-oxidizing atmosphere, so that the brazing agent can be of an improved capability of brazing aluminum articles and be produced inexpensively.

Method of making an aluminum alloy brazing agent containing a flux

A method is provided to braze aluminum materials to each other, the method comprising a step of producing a fluoride gas-containing atmosphere within a brazing oven. The method further comprises a step of brazing the aluminum materials, by heating said materials within said atmosphere melts. The fluoride gas-containing atmosphere is produced in the soldering oven: by introducing an inert gas and the fluoride gas through different passages; by introducing into the oven a mixture of the inert gas and the fluoride gas; or by heating a fluoride in a receptacle which is placed in the oven so as to gasify the fluoride within the oven.

Method for brazing aluminum materials

A flux for brazing is prepared from 31.5% to 56.2% of KF and 68.5% to 43.8% of at least one of .UPSILON.-AlF.sub.3 and finely divided .beta.-AlF.sub.3. The KF is dissolved in water, and the AlF.sub.3 is then placed into the resulting KF aqueous solution to react the KF with the AlF.sub.3. The reaction product is dried.

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Oyama, Japan

Yasuhiro Osame