Kobe Steel, Ltd.

Kabushiki Kaisha Kobe Seiko Sho

Denso Corporation

Toyota Jidosha Kabushiki Kaisha

Alcoa Inc.

Toshiki Ueda

Masayuki Takada

Takashi Inaba

Fumihiro Koshigoe

Shimpei Kimura

Akihiro Tsuruno

Takahiro Izumi

Jitsuto Shikata

Kenji Tokuda

Yasuhiro Nishioka

Tomohiro Nishimura

Nobuhiro Kobayashi

Makoto Morishita

Yoshinori Kato

Masaki Tanigawa

Katsushi Matsumoto

Masao Kinefuchi

Shinji Sakashita

Eiichi Tamura

Hiroshi Sato

Michiyasu Yamamoto

Hideo Fujimoto

Koichi Sakamoto

Masanori Ikeda

Naoki Sakashita

Kenji Harada

Fumihiro Sato

Hiroshi Kunii

Hideaki Hakuya

Jun Hisamoto

Stephen F Baumann

Hayaki Teramoto

Osamu Hakamata

Kenji Negura

Masao Takemoto

Keiichi Okazaki

Kouki Ikeda

Haruyuki Konishi

Kikuo Toyose

Yuji Shibuya

Takahiko Nagaya

Motohiro Horiguchi

Souichi Hayashi

Nagisa Takee

Asao Mochizuki

Masamichi Aono

Susumu Saisho

Toshihiro Chikada

Yasunori Nishioka

The present invention provides an aluminum alloy brazing sheet for electric resistance welding, which has high strength while being thinned and can reduce the occurrence of welding defects in the electric resistance welding. Disclosed is an aluminum alloy brazing sheet for electric resistance welding, including a core layer and a brazing filler layer cladded on at least one surface of the core layer, wherein the brazing filler layer is made of an aluminum alloy comprising Si: 5.5 to 12.0% by mass, and at least one of Na: 0.0003 to 0.0030% by mass and Sr: 0.0020 to 0.1000% by mass, with the balance being Al and inevitable impurities, wherein the brazing filler layer in a molten state at 650&#xb0; C. exhibits a viscosity of 0.01 Pa&#xb7;s or less.

Aluminum alloy brazing sheet for electric resistance welding

A brazing sheet includes a core material containing an aluminum alloy including magnesium, a bonding material laminated on at least one side of the core material, and a flux layer. The flux layer is laminated on one side of the bonding material and includes a flux composition. The flux composition includes [A] a flux component containing KAlF, and [B] AlF. A substance mass S1 (mol) of magnesium in the bonding material when heated at 585&#xb0; C., a substance mass S2 (mol) of [A] the flux component containing KAlFin the flux layer and a substance mass S3 (mol) of [B] AlFsatisfy the specific expression.

Brazing sheet and flux composition

Disclosed is a flux composition for use in brazing of an aluminum alloy material and includes a flux component [A] containing KAlF; and a fluoride [B] containing an element other than Group 1 elements and Group 2 elements and containing no potassium (K). Also disclosed is a brazing sheet which includes an aluminum alloy core; a filler material lying on or over at least one side of the core; and a flux layer lying on or over one side of the filler material and including the flux composition.

Flux composition and brazing sheet

An aluminum alloy brazing sheet for heat exchangers has a core, a sacrificial material formed on one side of the core, and a brazing filler metal formed on the other side of the core. The core is made of an aluminum alloy containing Si, Cu, Mn, and Al. The sacrificial material is made of an aluminum alloy containing Si, Zn, Mg, and Al. The brazing filler metal is made of an aluminum alloy. The aluminum alloy brazing sheet for heat exchangers has a work hardening exponent n of not less than 0.05. The core has an average crystal grain size of not more than 10 &#x3bc;m in a cross-section. The aluminum alloy brazing sheet for heat exchangers has excellent strength and corrosion resistance even when it is formed into a thin material and also has excellent high frequency weldability and weld cracking resistance during electric resistance welding.

Aluminum alloy brazing sheet for heat exchanger

Disclosed is an aluminum alloy brazing sheet for heat exchanger which excels in resistance to corrosion from its inside and simultaneously attains satisfactory erosion resistance and high strength. This includes a core material of an Al alloy containing predetermined amounts of Si, Mn, Cu, Mg, and Ti; a clad material of an Al alloy containing predetermined amounts of Si, Mn, and Zn, having a predetermined thickness, and lying on one side of the core material so as to constitute an inner side of a tube member of the heat exchanger; and a filler material of an Al alloy containing a predetermined amount of Si, having a predetermined thickness, and lying on the other side of the core material so as to constitute an outer side of the tube member. The crystal grain size of the core material after brazing under specific conditions is 50 &#x3bc;m or more but less than 300 &#x3bc;m in a rolling direction.

Aluminum alloy brazing sheet and method for producing the same

An aluminum alloy clad sheet for heat exchangers includes a core layer, a sacrificial layer disposed on one side of the core layer, and a brazing layer of an Al&#x2014;Si alloy disposed on the other side of the core layer, wherein the core layer contains Si: 0.15% to 1.6% by mass, Mn: 0.3% to 2.0% by mass, Cu: 0.1% to 1.0% by mass, Ti: 0.02% to 0.30% by mass, and the remainder of Al and incidental impurities, and the sacrificial layer contains Zn: 4.0% to 10.0% by mass, Cr: 0.01% to 0.5% by mass, and the remainder of Al and incidental impurities.

Aluminum alloy clad sheet for heat exchanger

Provided are a side member from which a clad member for heat exchanger exhibiting excellent productivity and corrosion resistance while preventing poor adhesion can be produced in production of a clad member for heat exchanger by controlling the surface state and flatness, a method for producing the side member, and a method for producing a clad member for a heat exchanger by using the side member. A side member (A) consists of a core material and one or more layers of side member (A) applied onto one side or both sides thereof and being used in a clad member for a heat exchanger, wherein a plurality of periodic forms (B) of fine groove which become arcuate toward one direction of the side member (A) is formed on the surface of the side member (A). The periodic form (B) of fine groove extends up to the outer circumferential edge of the side member (A) with a radius of curvature of 800-1500 mm and has a period (D) of 1-8 mm in the above-mentioned direction of the side member (A) and surface roughness of the side member (A) in the above-mentioned direction of 1-15 &#x3bc;m 10-point average roughness (Rz).

Side material and method for producing the same and method for producing clad member for heat exchanger

Skin material of a clad material is composed of one or more layers, each layer of the skin materials is made of a metal different from the core material in their component compositions, and at least one layer of the skin material has a cast microstructure, when the skin material is superposed on either of one or both faces of the core material.

Method for manufacturing clad material and equipment for manufacturing the same

Provided is a multi-layered sheet which has undergone heating corresponding to brazing, such as an aluminum-alloy radiator tube, or a multi-layered sheet such as an aluminum-alloy brazing sheet. The multi-layered sheet can have a reduced thickness and has excellent fatigue properties. The multi-layered sheet of aluminum alloys comprises a core layer () which has been clad at least with a sacrificial layer (). This multi-layered sheet is a multi-layered sheet to be subjected to brazing or welding to produce a heat exchanger or is a multi-layered sheet which has undergone heating corresponding to brazing. The core layer () comprises a specific 3000-series composition. In this core layer (), the average density in number of dispersed particles having a specific size has been regulated. As a result, fatigue properties, which govern cracking, can be highly improved.

Multi-layered sheet of aluminum alloys

An aluminum brazing sheet has a core material made of an aluminum alloy and a cladding material cladded on at least one side of the core material and made of an aluminum alloy having a potential lower than that of the core material. The cladding material is made of an aluminum alloy consisting essentially of 0.4 to 0.7 mass % of Mg, 0.5 to 1.5 mass % of Si, and 0.4 to 1.2 mass % of Mn, the remainder being Al and unavoidable impurities. Zn in the amount of 6 mass % or less is added in accordance with need. An aluminum brazing sheet having not only high strength but also less pressure adhesion failure and excellent productivity can be obtained.

Aluminum brazing sheet

To provide an aluminum alloy brazing sheet which can improve erosion resistance while maintaining post-braze strength, brazability, formability, corrosion resistance and other properties even when Mg is added to the core material. The aluminum alloy brazing sheet comprises an Al&#x2014;Si-based or Al&#x2014;Si&#x2014;Zn-based filler material cladded on at least one side of a core material. The core material comprises Si: 0.3 to 1.0% by mass, Mn: 0.6 to 2.0% by mass, Cu: 0.3 to 1.0% by mass, Mg: 0.15 to 0.5% by mass, Ti: 0.05 to 0.25% by mass, with the remainder being Al and inevitable impurities, and has the density of an Mg&#x2014;Si-based, Al&#x2014;Mg&#x2014;Cu-based, Al&#x2014;Cu&#x2014;Mg&#x2014;Si-based intermetallic compound with a particle size smaller than 0.5 &#x3bc;m of 10000/mm2 or higher, or has the density of the Mg&#x2014;Si-based, Al&#x2014;Mg&#x2014;Cu-based and Al&#x2014;Cu&#x2014;Mg&#x2014;Si-based intermetallic compounds with a particle size of 1.0 &#x3bc;m or larger lower than 5000/mm2.

Aluminium alloy brazing sheet

An aluminum alloy brazing sheet includes a core material containing Si, Cu and Mn by a predetermined amount, the balance being Al and inevitable impurities, a sacrificial anode material disposed on one face side of the core material and containing Si, Zn and Mg by a predetermined amount, the balance being Al and inevitable impurities, and a brazing filler material disposed on the other face side of the core material and formed of an aluminum alloy, and the area fraction of Zn&#x2014;Mg-based intermetallic compounds with 2.0 &#x3bc;m or above particle size on the surface of the sacrificial anode material may be 1.0% or below. Or otherwise, in the aluminum alloy brazing sheet, the number density of Al&#x2014;Cu-based intermetallic compounds with 0.5 &#x3bc;m or above particle size inside the core material may be 1.0 piece/&#x3bc;mor below.

Aluminum alloy brazing sheet

There is provided an aluminum alloy brazing sheet having an improved brazability than in the related art while keeping the post-braze strength, workability, corrosion resistance, and the like at respective prescribed or higher levels. An aluminum alloy brazing sheet has a two-layered structure in which on one side of a core material, a brazing material is provided. The core material contains Si: 0.6 to 1.0 mass %, Cu: 0.6 to 1.0 mass %, Mn: 0.7 to 1.8 mass %, Mg: 0.1 to 0.7 mass %, and Ti: 0.06 to 0.20 mass %, and the balance including Al and inevitable impurities. The brazing material includes an aluminum alloy containing Si: 3.0 to 12.0 mass %, the gage of the aluminum alloy brazing sheet is 0.6 to 1.4 mm, and the area ratio of a {001} plane in the core material surface is 0.3 or more.

Disclosed is an aluminum alloy brazing sheet for heat exchangers, which has high strength after brazing, high corrosion resistance and excellent brazability. Specifically disclosed is an aluminum alloy brazing sheet () for heat exchangers comprising a core member (), a sacrificial member () formed on one side of the core member (), and a brazing filler metal () formed on the other side of the core member () and composed of an Al&#x2014;Si alloy. The sacrificial member () contains 0.03-0.30% by mass of Fe, 0.01-0.40% by mass of Mn, 0.4-1.4% by mass of Si, 2.0-5.5% by mass of Zn, not more than 0.05% by mass of Mg and the balance of Al and unavoidable impurities. In addition, the sacrificial member () has a crystal grain size of 100-400 & mgr;m after 5-minute heat treatment at 600 & ring;C during the brazing.

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Moka, Japan

Toshiki Ueda