Abstract:
The invention relates to a method for welding shaped bodies made of carburized heat-resistant steel. The inventive method is characterized in that the parts to be welded are pre-heated to temperatures of 700-900 °C before welding, and are welded at a current intensity ranging from 50 to 200 A.
Abstract:
A turbine rotor consisting of a wheel made of a TiAl alloy of good heat resistance and a rotor shaft made of a steel with good bonding strength is disclosed. As the shaft material a structural steel or a martensitic heat resistant steel is used. A TiAl turbine wheel made by precision casting is butted to the shaft with insertion of a brazing filler in the butted interfaces and stress of 0.01kgf/mm 2 or higher but lower than yield stress of the shaft is applied on the butted interfaces under heating by high frequency induction heating in atmosphere of an inert gas or a reducing gas to a temperature higher than the liquidus temperature of the brazing metal but not exceeding 100°C above the liquidus temperature. Turbine rotors with good accordance of the axes of the wheel and the shaft will be obtained by fitting a projection (or recess) and a recess (or projection) formed at the base of the wheel and the end of the shaft concentrically to the outer shape thereof, and by brazing the ring-shaped area outside the fitted parts.
Abstract:
An apparatus for joining two ring-shaped members (12,13) in stacked relation is disclosed and comprises a jig (28), pressing means (50), drive means (60) and spot welding means (70). The pressing means (50) is configured for urging a first ring-shaped member (12) into contact with a second ring-shaped member (13) held by the jig (28) so that they can be rotated together by the drive means (60) and the spot welding means (70) is configured for tack-welding ring-shaped members (12,13) being rotated by the drive means (60). The apparatus is specifically intended for use in the manufacture of a device for counteracting the imbalance caused by the uneven distribution of laundry in a washing machine drum.
Abstract:
Gegenstand der Erfindung ist ein hochwarmfester Aluminiumwerkstoff, insbesondere für Kolben von Verbrennungsmotoren, erhalten durch mechanisches Legieren von Pulvern von Aluminium und einem oder mehreren der Aluminiumlegierungselemente Si, Mg, Zn, Cu, Ni, Ti, C, wobei die Teilchengröße des Aluminiums und der Aluminiumlegierungselemente bis etwa 100 µm beträgt und der Anteil an Legierungselementen nicht größer als 25 Gew.-% des Aluminiumanteils ist, sowie von einem oder mehreren der Dispersoide Al 2 O 3 , TiC, SiO 2 , SiC, wobei die Teilchengröße des oder der Dispersoide bis etwa 50 µm beträgt und der Anteil an Dispersoiden an der Gesamtmenge zwischen 7,5 und 50 Gew.-% beträgt, kaltes Vorpressen des Pulvergemisches und heißisostatisches Verdichten des vorgepreßten Pulvergemisches auf theoretische Dichte.
Abstract translation:通过机械合金化Si,Mg,Zn,Cu,Ni,Ti或C的Al和Al合金元素的粉末获得耐热Al材料.Al和合金元素的粒径约为100mm,合金元素的量 不超过Al量的25重量%。 也存在分散Al 2 O 3,TiC,SiO 2或SiC。 还声称是生产活塞。
Abstract:
Gegenstand der Erfindung ist ein Verfahren zur stoffschlüssigen Verbindung eines ersten und eines zweiten Teils, mit folgenden Verfahrensschritten: Herstellen des ersten Teils mit einer ersten Verbindungsfläche, an der die stoffschlüssige Verbindung hergestellt werden soll, Herstellen des zweiten Teils mit einer zu der ersten Vebindungsfläche zumindest in etwa komplementären zweiten Verbindungsfläche, Zusammenführen der beiden Teile an den Verbindungsflächen, Abdichten des stoffschlüssig zu verbindenden Bereichs durch eine längs der vollständigen Ränder der beiden Verbindungsflächen verlaufende Elektronenstrahlschweißnaht, heißisostatisches Pressen der beiden Teile zur Ausbildung der stoffschlüssigen Verbindung an den Verbindungsflächen, formgebende Fertigbearbeitung der durch heißisostatisches Pressen verbundenen Teile unter Entfernung der Elektronenstrahlschweißnaht, wobei vor dem Ausbilden der Elektronenstrahlschweißnaht und jedenfalls im Bereich der auszubildenden Elektronenschweißnaht auf wenigstens eines der beiden Teile eine Ummantelung (2) aus einem gut elektronenstrahlschweißbaren Material durch heißisostatisches Pressen aufgebracht wird.
Abstract:
Die Erfindung betrifft ein Verfahren zur Herstellung von Hohlkörperstrukturen aus insbesondere in Coilform vorliegenden Blechen (B1-B4). Die Bleche (B1-B4) werden übereinandergelegt und in der Ebene der Bleche in vorgegebenen Abständen fest miteinander verbunden, insbesondere miteinander verschweißt. Anschließend werden die Zwischenräume zwischen den Blechen durch Innendruck zu Hohlräumen (10) ausgeformt.
Abstract:
The invention concerns a method for manufacturing of square pipes from coated steel strips. Both sides of the strip are coated with metal, say zinc or aluminium. The strips also can be industrially painted e.g. with PVC-plastics directly upon the steel surface or upon the metal-coated surface. The shaping is carried out in a continuous roller shaping device by at first shaping a profile (6) with a bottom part (7) and side parts (8) equal to the finished pipe. The top parts (9) are made equal to half of the bottom part of the pipe and ended with foldings (5). The angle (11) between the bottom part (7) and the side parts (8) is made acute and the angle (12) between the side parts (8) and the top parts (9) is made obtuse. The facing coated surfaces (13) at the foldings (5) are heated by laser and compressed at the following roller shaping when the finished shape of the pipe is made.
Abstract:
Composite elements of plastic-covered plate for composable structures, especially shelving, formed by the connection of a flat plate element (11) and a box-type plate element (12), wherein one element acts as a supporting shelf or as an exterior surface of the composable structures and the other element acts as a reinforcing element, wherein the flat plate element (11) is plastic-covered on both of its surfaces (13) and the box-type plate element (12) is plastic-covered on its exterior surface or is plastic-covered on both of its surfaces, the flat plate element (11) being provided with a plurality of non plastic-covered zones (14), which are opposite and connected to a plurality of non plastic-covered and drawn zones (16,17) provided on the plastic-covered exterior surface of the box-type plate element (12).
Abstract:
A method for joining a valve member for use within a valve, the method including brazing a body portion having a head and a base, the base having a bore extending a depth therein, to a leg portion having a shaft, the shaft having a distal end, a proximal end opposite the distal end, and a plurality of legs extending radially and axially therefrom and away from the proximal end, the brazing including placing a braze material between the bore and the proximal end, inserting the proximal end into the bore such that a portion of an outer surface of the proximal end is adjacent to an inner surface of the bore, and heating at least the adjacent surfaces to a braze temperature.