Kobe Steel, Ltd.

T.rad Co., Ltd.

Kabushiki Kaisha Kobe Seiko Sho

Katsuhiro Matsukado

Akihiro Tsuruno

Yoshinori Kato

Kenji Yamamoto

Takenori Nakayama

Takashi Yashiki

Shinji Sakashita

Disclosed is an aluminum alloy brazing sheet () for heat exchangers, the brazing sheet provided with a core material () and a filler material () that comprises an Al&#x2014;Si&#x2014;Zn alloy and is formed on at least one side of the core material (). The core material () has a pitting potential of &#x2212;650 mV or more (vs. Ag/AgCl). The filler material () has a zinc concentration of from 1 to 10 percent by mass; a liquid fraction X, at the brazing temperature, satisfying the relation 0.3&#x2266;X&#x2266;0.88; and a clad ratio d (%) satisfying the relation 15&#x3c;d&#x2266;30. The filler material has a product (X&#xd7;d) of the liquid fraction X and the clad ratio d (%) satisfying the relation 6&#x2266;X&#xd7;d)&#x2266;23.

Aluminum alloy brazng sheet for heat exchangers and aluminum alloy brazed article for heat exchangers

The present invention provides an aluminum alloy material which is used as a core material for an aluminum alloy brazing sheet and has superior strength at a high temperature. The aluminum alloy material of the present invention is used as a core material Cfor an aluminum alloy brazing sheet B(or B) which has a filler alloy F formed on at least one side of the core material C. The aluminum alloy material contains more than 2.5% by mass and 3.5% by mass or less of Cu, and the balance being made of aluminum and unavoidable impurities.

Aluminum alloy material and aluminum alloy brazing sheet

A brazing sheet of aluminum alloy composed of a core material and a first brazing filler metal covering one surface of the core material. The core material contains as an essential component 0.2-1.0 mass % of Cu and as optional components at least one species of no more than 1.5 mass % of Si, no more than 1.8 mass % of Mn, no more than 0.35 mass % of Ti, and no more than 0.5 mass % of Mg, with the remainder being Al and inevitable impurities. The first brazing filler metal has a liquid phase ratio (X %) at 600&#xb0; C. and a thickness (Y &#x3bc;m) such that X and Y satisfy the following relationship: (1) 30&#x2266;X&#x2266;80, (2) Y&#x2267;25, and (3) 1000&#x2266;X&#xd7;Y&#x2266;24000. The brazing sheet provides good brazeability and maintains high corrosion resistance after brazing on the surface cladded with the brazing filler metal.

Brazing sheet of aluminum alloy

A titanium alloy material includes a Ti&#x2014;Al alloy and an oxide film on the Ti&#x2014;Al alloy. The Ti&#x2014;Al alloy contains 0.50-3.0 mass % Al and a balance of Ti and unavoidable impurities. The titanium alloy material has excellent hydrogen absorption resistance and can be used as a basic structural material in hydrogen absorption environments.

Titanium alloys excellent in hydrogen absorption-resistance

An amorphous carbon (DLC) film having excellent adhesion at high temperature is provided. An amorphous-carbon-based hard multilayer film, which is formed on a surface of a substrate, includes a base layer formed at a substrate side, a surface layer formed at a surface side, and a compositional gradient layer formed between the base layer and the surface layer, wherein the base layer includes a nitride or a carbo-nitride of an element M expressed by the following formula (1), the surface layer includes an amorphous carbon film containing C of 50 atomic percent or more, and the compositional gradient layer is a layer in which the element M and nitrogen are decreased, and carbon is increased from the base layer to the amorphous carbon film:MCN&#x2003;&#x2003;(1),

Growing community of inventors

Moka, Japan

Katsuhiro Matsukado