A plate heat exchanger has two metal plates brought into abutment, with a solder material between the plates. The plates are heated up to a first temperature. The plates are placed into a mold, the mold surfaces of which have cavities for envisaged channel structures. Channel structures are formed by local internal pressure forming of at least one plate under pressurization by the tool. The plates are heated up to a second temperature. The plates are solder bonded at the abuted surfaces. A plate heat exchanger has two metal plates, wherein channel structures have been formed in at least one plate and the plates are bonded to one another by soldering away from the channel structures. Eutectic microstructures having a longest extent of less than 50 micrometers are formed in the solder layer.

A method for forming heatsink tube includes cutting a base sheet plate into a first molded frame and a second molded frame, applying a flux on an inner face of the first molded frame and the second molded frame, mounting the first molded frame on a heatsink fin module, and mounting the second molded frame on the first molded frame, to assemble the first molded frame, the heatsink fin module, and the second molded frame, and to form a heatsink tube. The first molded frame has a first end faceplate and two first connecting portions. The second molded frame has a second end faceplate and two second connecting portions. Each of the two first connecting portions is formed with a first abutting section, and each of the two second connecting portions is formed with a second abutting section.

An enclosed heat sink with a brazed structure is provided. The enclosed heat sink with the brazed structure includes a first brazing plane formed on a top surface of a first brazing body, and a second brazing plane formed on a bottom surface of a second brazing body. The first brazing plane and the second brazing plane are pressed and brazed together, so that the first brazing body and the second brazing body enclose a cavity. A plurality of channels are formed on the first brazing plane, and each of the channels is neither perpendicular nor parallel to the first brazing plane.

An aluminum alloy for flux-free brazing provided for brazing performed via an Al-Si-based brazing material without a flux in a non-oxidizing atmosphere without depressurization, includes: by mass %, 0.01% to 2.0% of Mg; and 0.005% to 1.5% of Bi, wherein in the aluminum alloy, there are more than 10 Mg-Bi-based compounds having a diameter of 0.01 μm or more and less than 5.0 μm in terms of equivalent circle diameter per 10,000-μm.sup.2 visual field and there are less than 2 Mg-Bi-based compounds having a diameter of 5.0 μm or more per 10,000-μm.sup.2 visual field in a cross section parallel to a rolling direction, and in the aluminum alloy, there are less than 5 Bi particles having a diameter of 5.0 μm or more in terms of equivalent circle diameter per 10,000-μm.sup.2 visual field in the cross section parallel to the rolling direction.

A welding method for a connector and a connection tube of a heat exchanger are proposed. The method includes: forming a diffusion layer on a surface of the connector, a corrosion potential of the diffusion layer being less than a corrosion potential of the connector; inserting a connection tube into the connector; brazing the connection tube to the connector by a brazing filler metal, a corrosion potential of a weld metal formed after brazing of the brazing filler metal being higher than the corrosion potential of the connector and less than a corrosion potential of the connection tube.

A method of making a heat exchanger that includes sealing tubes to header slots and brazing the tubes to the header slots. The method further includes coupling a cover to the header to cover a liquid-side surface of the header and to cover ends of the tubes, and applying flux to an air-side surface of the header and to the tubes. Coupling the cover to the header is performed after sealing the tubes to the header slots and coupling the cover to the header is performed before applying flux to the air-side surface of the header and to the tubes. Applying flux is performed before brazing each of the tubes to the header slots and sealing each of the tubes to the header slot includes sealing a perimeter of each of the tubes to the header slot.

Coolant-cooled heat sinks and methods of fabrication are provided with a coolant-carrying compartment between a cover and a heat transfer base. The heat transfer base includes a heat transfer surface to couple to a component to be cooled, and a plurality of thermally-conductive fins extending into the coolant-carrying compartment from a surface of the heat transfer base opposite to the heat transfer surface. One or more grooves are provided in an interface surface of the cover and fins, and wicking element(s) are positioned within, at least in part, the groove(s). A joining material is provided between the cover and fins to join the plurality of thermally-conductive fins to the cover. The wicking element(s) within, at least in part, the groove(s) facilitate retaining the joining material over the plurality of thermally-conductive fins during joining of the cover and fins.

A base block has a longitudinal direction and a width direction and includes a recessed part in which a heat receiving tubular portion is accommodated, and a container part of a heat pipe is caulked and fixed in a recessed part and a first metal part containing first metal having a melting point equal to or higher than 130° C. and equal to or lower than 400° C. and/or a first metal alloy having a melting point equal to or higher than 130° C. and equal to or lower than 400° C. is formed between the recessed part and an outer surface of the container part.

The invention relates to a rolled fin stock material from an 3xxx-series aluminium alloy comprising, in wt. %, Mn 0.7% to 2.0%, Si 0.4% to 1.5%, Zn up to 4%, Fe up to 0.8%, Zr 0.02% to 0.40%, Sc 0.01% to 0.6%, Ni up to 0.3%, Cu up to 0.5%, Mg up to 2%, Cr up to 0.3%, Ti up to 0.3%, the balance aluminium and tolerable impurities. The invention further relates to a brazed assembly of components incorporating such a fin stock material.

A first connection portion is located on one side of a predetermined flow path member in a plane direction. The predetermined flow path member and another flow path member are bonded by brazing at the first connection portion. A second connection portion is located on the other side of the predetermined flow path member. The predetermined flow path member and another flow path member are bonded by brazing at the second connection portion. A brazing material layer extends over the predetermined flow path member, the first connection portion, and the second connection portion. A hilling portion is a portion of the predetermined flow path member. The hilling portion is curved to protrude toward a side on which the brazing material layer is provided. The hilling portion extends along a direction in which the first connection portion or the second connection portion extends.