Abstract:
A downhole tool and method for manufacturing such downhole tool. The downhole tool includes a bit body having a blank and a matrix bonded to and surrounding the blank, a shank having a threaded connection at one end, and a butt joint formed within a gap formed between the blank and the shank and coupling the blank to the shank. The blank includes a first planar surface while the shank includes a second planar surface opposite the one end. The butt joint is formed between the first and second planar surfaces when positioned adjacent to one another, wherein the first planar surface is positioned external to the matrix.
Abstract:
This disclosure relates to a soldering system containing a soldering apparatus and a heating apparatus. The soldering apparatus includes a heating plate having a body defining a plurality of first air exits, each first air exit extending through the body of the heating plate and the heating plate being configured to supply hot air through the first air exits; a cover disposed on the heating plate, the cover and the heating plate defining a hot air chamber; a plurality of axially movable positioning shafts extending though the body of the heating plate, in which each shaft has a first end and a second end, the first end is in the hot air chamber, and the second end is outside the hot air chamber; and a conduit attached to the cover, the conduit being configured to supply hot air to the hot air chamber.
Abstract:
A method of brazing metallic composites is described. The method provides advantage whereby need to machine or otherwise treat metallic surfaces to be bonded is reduced or substantially removed. The method of the invention includes steps of placing a ferrous based brazing alloy adjacent to a surface of a first material, such as a steel substrate, the ferrous based brazing alloy and surface of the first material having a carbon component arranged therebetween. A second material, such as a white cast iron, is also arranged to be adjacent to the ferrous based brazing alloy. The first and second materials, with ferrous based brazing alloy and carbon component arranged therebetween is subjected to heat until brazing temperature is reached. The temperature is maintained until a metallurgical bond between the ferrous based brazing alloy and the first and second materials is achieved. Compositions of ferrous based brazing alloys are also described.
Abstract:
Metallic components, including superalloy components such as turbine vanes and blades, are joined or repaired by electric resistance with a high electrical resistivity brazing alloy composition. In some embodiments the brazing alloy comprises filler metal selected from the group consisting of nickel, iron, and cobalt base alloy and elements selected from the group consisting of phosphorous (P), boron (B), silicon (Si), germanium (Ge), sulfur (S), selenium (Se), carbon (C), tellurium (Te) and manganese (Mn). In performing the method of the present invention a high electrical resistivity brazing alloy composition is introduced within a substrate defect or interposed between two substrates that are to be joined. An electric current is passed through the brazing alloy until the alloy melts and bonds to the adjoining substrate. High resistivity of the brazing alloy concentrates heat generated by the current flow in the brazing alloy rather than in the substrate.
Abstract:
A system for fabricating silicon carbide assemblies that includes at least two silicon carbide materials; at least one joining interlayer positioned between the at least two silicon carbide materials, wherein the at least one joining interlayer further includes a first material that melts at a first temperature and a second material interspersed throughout the first material, and wherein the second material melts at a temperature that is lower than that of the first material; and at least one apparatus for applying energy to the joining interlayer, wherein applying energy to the joining interlayer is operative to soften the first material and melt the second material, and wherein softening the first material and melting the second material is operative to transform the joining interlayer into a substantially porosity-free adherent material capable of joining together the at least two silicon carbide materials.
Abstract:
Die vorliegende Erfindung betrifft ein Verfahren zur Anordnung einer Beschichtung (8,9), insbesondere einer Panzerung, auf einem Bauteil (1), insbesondere einem TiAl-Triebwerksteil, wobei die Beschichtung einen metallischen Beschichtungswerkstoff umfasst, und wobei ein Grünling mit dem Beschichtungswerkstoff gebildet wird, der unter Anwesenheit eines Lots auf dem Bauteil (1) angeordnet wird und mittels eines kombinierten Löt-Sinter-Prozess zu einer Beschichtung geformt und auf dem Bauteil befestigt wird.