A brazed joint having excellent tensile strength (TSS and CTS) and a method of production of the same are provided. A sheet combination 200 comprised of steel sheets 210, 220 between which a brazing filler metal 230 is clamped is heated at a temperature of the Ac3 point of the steel sheet (matrix material) or more. The Ar3 point of the regions near the brazing filler metal at the steel sheets is made higher than the Ar3 point of the steel sheets (matrix material), then the quenching start temperature X is made a temperature of the Ar3 point of the steel sheet (matrix material) or less and hot stamping is performed to produce a brazed joint.

The disclosed method relates to manufacturing a heat exchanger which causes no brazing defects, and a heat exchanger manufactured by the method. The method relates to manufacturing a heat exchanger having an aluminum alloy tube defining a cooling-medium flowing passage and a copper alloy tube defining a water flowing passage, wherein a heat exchange is carried out between a cooling medium flowing through the cooling-medium flowing passage and water flowing through the water flowing passage. The aluminum alloy tube and the copper alloy tube are brazed to each other at a temperature of less than 548° C.

An improved method for forming a capacitor is provided as is a capacitor, or electrical component, formed by the method. The method includes providing an aluminum containing anode with an aluminum oxide dielectric thereon; forming a cathode on a first portion of the aluminum oxide dielectric; bonding an anode lead to the aluminum anode on a second portion of the aluminum oxide by a transient liquid phase sintered conductive material thereby metallurgical bonding the aluminum anode to the anode lead; and bonding a cathode lead to said cathode.

An aluminum wire body, in which an aluminum or aluminum alloy electric wire and a metal to be joined are joined by solder, wherein the solder includes an oxide glass including vanadium and a conducting particle. Preferably, the conducting particle contained in the solder is 90% by volume or less and the oxide glass is 20% by volume to 90% by volume. Further preferably, the oxide glass includes 40% by mass or more of Ag.sub.2O in terms of oxides and the glass transition point is 180° C. or less.

A multi-layered brazing sheet material including an aluminium core alloy layer, a brazing clad layer material on one face of the core layer, an inter-layer between the core layer and brazing clad layer material, and a water-side layer on the other face of the core layer. The core layer made from aluminium alloy having, in wt. %, up to 0.6% Si, up to 0.45% Fe, 0.6% to 1.25% Cu, 0.6% to 1.4% Mn, 0.08% to 0.4% Mg, up to 0.2% Cr, up to 0.25% Zr, up to 0.2% Ti, up to 0.3% Zn, balance aluminium and impurities. The brazing layer made from aluminium alloy having 6% to 14% Si and up to 2% Mg, balance aluminium and impurities. The inter-layer made from 1xxx-series aluminium alloy. The water-side layer made from 3xxx-series aluminium alloy having 0.5% to 1.8% Mn and 1% to 3.5% Zn.

A multi-layered brazing sheet material including an aluminium core alloy layer, a brazing clad layer material on one face of the core layer, an inter-layer between the core layer and brazing clad layer material, and a water-side layer on the other face of the core layer. The core layer made from aluminium alloy having, in wt. %, up to 0.6% Si, up to 0.45% Fe, 0.6% to 1.25% Cu, 0.6% to 1.4% Mn, 0.08% to 0.4% Mg, up to 0.2% Cr, up to 0.25% Zr, up to 0.2% Ti, up to 0.3% Zn, balance aluminium and impurities. The brazing layer made from aluminium alloy having 6% to 14% Si and up to 2% Mg, balance aluminium and impurities. The inter-layer made from 1xxx-series aluminium alloy. The water-side layer made from 3xxx-series aluminium alloy having 0.5% to 1.8% Mn and 1% to 3.5% Zn.

A system and method are disclosed for polishing and lubricating an aluminum welding wire. The system and method draw stock aluminum wire from a spool, subject the stock wire to a plurality of drawing and thermal treatment steps to obtain a wire having a final diameter suitable for use in a continuous welding apparatus. Immediately after the final drawing step, the wire is subjected to a polishing and lubricating process in which a cord that is impregnated with a lubricant is passed over the surface of the wire. The cord serves to remove contaminants, such as metal fines, from the surface of the wire, and also to provide a layer of lubricant over the surface of the wire. The resulting wire has an improved appearance, will not clog the automatic welding apparatus, and the lubricant will not contribute adversely to weld porosity in use.

The invention relates to an ingot consisting of an aluminium solder alloy having in percentage by weight 4.5%≦Si≦12%; and optionally one or more of the following alloying constituents in percentage by weight: Ti≦0.2%, Fe≦0.8%, Cu≦0.3%, Mn≦0.10%, Mg≦2.0%, Zn_23 0.20%, Cr≦0.05%, with the remainder aluminium and unavoidable impurities, individually at most 0.05 wt %, in total at most 0.15 wt %, wherein boron is additionally provided as an alloying constituent, wherein the boron content is at least 100 ppm and the aluminium alloy is free from primary Si particles having a size of more than 20 μm. The invention further relates to an aluminium alloy product consisting of an aluminium alloy, to an ingot consisting of an aluminium alloy and to a method for producing an aluminium alloy.

The invention relates to an ingot consisting of an aluminium solder alloy having in percentage by weight 4.5%≦Si≦12%; and optionally one or more of the following alloying constituents in percentage by weight: Ti≦0.2%, Fe≦0.8%, Cu≦0.3%, Mn≦0.10%, Mg≦2.0%, Zn_23 0.20%, Cr≦0.05%, with the remainder aluminium and unavoidable impurities, individually at most 0.05 wt %, in total at most 0.15 wt %, wherein boron is additionally provided as an alloying constituent, wherein the boron content is at least 100 ppm and the aluminium alloy is free from primary Si particles having a size of more than 20 μm. The invention further relates to an aluminium alloy product consisting of an aluminium alloy, to an ingot consisting of an aluminium alloy and to a method for producing an aluminium alloy.

A clad material for a cooler is provided by executing production of a tensile strain of 3 to 10% or rolling at a finish rolling ratio of 10 to 25%, and optionally performing a heat treatment for 1 to 8 hours at a temperature within a range from 150 to 400° C., on a clad raw material having a three layer structure of a core material, a first brazing filler metal layer that covers one side (the surface on the side of a cooling water passage) of this core material, and a second brazing filler metal layer that covers the other side (the surface on the opposite side from the cooling water passage). Specific ranges are prescribed for certain properties before and after brazing.