Abstract:
The present invention relates to a method for treating functional surfaces, i.e. surfaces determining tolerance and position accuracy, on objects (26) of metal, hereafter named matrix material. The invention is characterised in that the functional surfaces are obtained by melting certain areas of the surface layer of the object with high energy and simultaneous supply of additive (28) comprising wear resistance increasing material.
Abstract:
Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung eines metallischen Abgaskatalysatorträgerkörpers, wobei aus abwechselnden Lagen glatter (1) und gewellter (2) Bliechstreifen ein Rohling (60) gewickelt und dieser dann in ein Mantelrohr (4) eingesetzt wird.Um auch kompliziertere Querschnittsflächen verwirklichen zu können, muß der Rohling (60) aus unterschiedlich langen Windungen (W 1 ,W 2 ,...W n ) bestehen, deren jeweilige Länge sich nach der genauen Form der später auszufüllenden Querschnittsfläche richtet. Der Rohling (60) ist auf einer Seite (P) eng gewickelt, wobei die einzelnen Lagen untereinander vorfixiert (3), vorzugsweise punktverschweißt, sind. Eine entsprechend angepaßte Vorrichtung ermöglicht die Herstellung solcher Rohlinge, die sich insbesondere zur Ausfüllung von unregelmäßig geformten, in etwa keilförmigen Querschnittsflächen und dergleichen eignen.
Abstract:
The invention relates to a method for producing a permanently joined plate heat exchanger (1) comprising a plurality of metal heat exchanger plates (2) having a solidus temperature above 1100 ºC, provided beside each other and forming a plate package (3) with first plate interspaces (4) for a first medium and second plate interspaces (5) for a second medium, wherein the first and second plate interspaces (4, 5) are provided in an alternating order in the plate package (3). Each heat exchanger plate (2) comprises a heat transfer area (10) and an edge area (11) which extend around the heat transfer area (10). The heat transfer area (10) comprises a corrugation of elevations (18) and depressions (19), wherein said corrugation of the plates are provided by pressing the plates. The invention also relates to a plate heat exchanger (1) produced by the method.
Abstract:
The invention relates to a method for producing a permanently joined plate heat exchanger (1) comprising a plurality of metal heat exchanger plates (2) having a solidus temperature above 1100 ºC, provided beside each other and forming a plate package (3) with first plate interspaces (4) for a first medium and second plate interspaces (5) for a second medium, wherein the first and second plate interspaces (4,5) are provided in an alternating order in the plate package (3), wherein each heat exchanger plate (2) comprises a heat transfer area (10) and an edge area (11) comprising bent edges(15) which extend around the heat transfer area (10), wherein a first surface (16) of the plates (2) forms a convex shape and a second surface (17) of the plates forms a concave shape wherein the heat transfer area (10) comprises a corrugation of elevations (18) and depressions (19), wherein said corrugation of the plates and the bent edges (15) are provided by pressing the plates. The invention also relates to a plate heat exchanger (1) produced by the method.
Abstract:
A method for joining a first metal part (11) with a second metal part (12), the metal parts (11,12) having a solidus temperature above 1100 QC. The method comprises: applying a melting depressant composition (14) on a surface (15) of the first metal part (11), the melting depressant composition (14) comprising a melting depressant component that comprises at least 25 wt% boron and silicon for decreasing a melting temperature of the first metal part (11 ); bringing (202) the second metal part (12) into contact with the melting depressant composition (14) at a contact point (16) on said surface (15); heating the first and second metal parts (11,12) to a temperature above 1 100 QC; and allowing a melted metal layer (210) of the first metal component (11) to solidify, such that a joint (25) is obtained at the contact point (16). The melting depressant composition and related products are also described.
Abstract:
The present invention provides an aluminium alloy-copper alloy bond and a method for same, the bond being bonded by means of a novel aluminium alloy-copper alloy bonding method which exhibits excellent bonding properties, little material deformation during bonding, and excellent reliability. A bond in which one member to be bonded is an aluminium alloy, an other member to be bonded is a copper alloy, and the one member to be bonded and the other member to be bonded are metallic bonded, wherein: the one member to be bonded is an aluminium alloy including 3.0-8.0 mass% Cu and 0.1-10 mass% Si, with the remainder being Al and unavoidable impurities, and satisfies C+2.4xS>=7.8 where C (mass%) is the Cu concentration and S (mass%) is the Si concentration; and the other member to be bonded is a copper alloy having a higher solidus temperature than the one member to be bonded.