26 results about "Braze alloy" patented technology

A metallic sealing tape has a metallic layer and a layer of a pressure-sensitive adhesive disposed on one side of the metallic layer. The metallic layer is comprised of a brazing alloy, and may, e.g., comprise a thin foil of the brazing alloy. The brazing alloy may be, e.g., a copper-phosphorus alloy or a copper-phosphorus-silver alloy. A method for using the metallic sealing tape includes sealing a joint between two pipes with the metallic sealing tape and brazing the joint without removing the metallic sealing tape. The brazing may include heating the metallic sealing tape and may also include adding additional filler metal to the joint.

A rotatable cutting bit assembled with a tool body having a head portion and a first cavity, and a cutting tip having a base portion and a second cavity. A mass of brazing alloy keys the cavities together so that the cutting tip and the tool body are coaxially aligned in a central longitudinal axis. The cutting tip brazes to the tool body by brazing alloy flowing outwardly from within the first and second cavities into a gap between the head portion and the base portion. A first outer diameter of the head portion is substantially equal to a second outer diameter of the base portion. The performance and longevity of the rotatable cutting bit formed is enhanced by having an exterior surface that is flush across the base portion and the head portion.

The invention discloses a whole-process preparation method of a manganese-based brazing alloy strip, which comprises the following components in percentage by mass: 24-26% of Ni, 4.5-5.5% of Cr, 0.03-0.07% of Se, less than or equal to 0.07% of C, less than or equal to 0.025% of S, less than or equal to 0.012% of P and the balance of Mn. The method comprises the following steps: 1, forging a manganese-based brazing alloy ingot; 2, hot rolling; 3, annealing treatment; 4, multi-pass cold rolling; 5, annealing treatment; and sixthly, the manganese-based brazing alloy strip is prepared through multi-pass cold rolling. According to the preparation method, the whole-process preparation process is designed for specific manganese-based brazing alloy components, through strict control over a deformation system and precise heat treatment, fish scale lines and edge broken edges, caused by excessive deformation, on the surface of the strip are avoided, manganese element is prevented from being oxidized and volatilized, the preparation efficiency of the manganese-based brazing alloy strip is improved, and the service life of the manganese-based brazing alloy strip is prolonged. And the method is suitable for the fields of spaceflight and the like.

The invention relates to the technical field of high-temperature alloy welding materials and processes, in particular to gradient composite brazing filler metal and a preparation method and application thereof. The gradient composite brazing filler metal comprises a first alloy layer, a second alloy layer and a third alloy layer which are sequentially arranged in a stacked mode, the first alloy layer and the third alloy layer are both made of Ag-Cu-Zn-Sn alloy, and the second alloy layer is made of Cu-Zn-Ni alloy. The gradient composite brazing filler metal is suitable for low-temperature efficient welding of the GH4169D alloy, and the problem that the temperature of brazing the GH4169D alloy through traditional Ni-based brazing filler metal and Ti-based brazing filler metal is too high, and consequently an eta phase in the alloy is dissolved is solved; the GH4169D alloy is welded by adopting the welding process of matching the gradient composite brazing filler metal with stepped pressure reduction, ultrahigh-strength connection can be realized under the condition that the temperature is lower than the Eta phase transformation temperature of the GH4169D alloy, the thermal damage risk is remarkably reduced, and the joint reliability is improved.

This invention discloses a method for preparing low-defect Mn70Ni25Cr5 brazing alloy ingots based on a comprehensive evaluation of shrinkage cavity tendency, belonging to the field of non-ferrous alloy casting and brazing alloy preparation technology. First, a three-dimensional coupled heat transfer and solidification model of the casting and mold is established, and alloy thermophysical parameters and interface heat transfer boundary conditions are input. Then, the porosity of the ingot body region, the duration of the mushy zone, and the average cooling rate are extracted. Structural parameter relationship models, process parameter relationship models, and a normalized comprehensive shrinkage cavity evaluation function are established respectively. The optimal combination of structure and process parameters is determined by minimizing the evaluation value. This invention can achieve synergistic optimization of the mold structure and the casting process, transferring shrinkage cavity and porosity defects from the ingot body region to the riser region, reducing the porosity of the ingot body region, and improving the continuity of the ingot structure and the stability of subsequent rolling forming. The preferred parameter combination obtained by the method is: mold taper 2°, mold wall thickness 30mm, casting temperature 1215℃, filling time 6s, and mold temperature 300℃.

Aluminium alloy brazing sheet, used for brazing in an inert gas atmosphere without the use of a flux, with: a brazing alloy material that is plated onto at least one side surface of a core material, where the core material is aluminum or an aluminum alloy core material containing one or two or more of Fe of 1.50 wt% or less, Si of 1.50 wt% or less, Cu of 2.00 wt% or less, Mn of 2.00 wt% or less, Zn of 3.00 wt% or less, Cr of 0.30 wt% or less, Ti of 0.30 wt% or less, Zr of 0.30 wt% or less, In of 0.10 wt% or less and Sn of 0.10 wt% or less, the remainder being aluminium and unavoidable impurities, is formed, wherein the brazing alloy material is an aluminum alloy brazing alloy material having Si of 4.00 to 13.00 wt% and one or two or more of Mg of more than 0.03 wt% and 3.00 wt% or less, Li of more than 0.03 wt% and 3.00 wt% or less, and Ca of more than 0.03 wt% and 3.00 wt% or less, the remainder being aluminum and unavoidable impurities, wherein an oxide is formed on a surface of the aluminium alloy brazing sheet by brazing heating, which has an oxide of one or two or more of Mg, Li and Ca and has a volume change ratio of 0.990 or less to a surface oxide film formed before brazing heating, and an atomic molar ratio of Mg, Ni and Ca to Al in the oxide formed on the surface of the aluminium alloy brazing sheet before brazing heating is 0.5 or less.

The invention provides an orderly-arranged vacuum brazing diamond grinding tool and a production process thereof. The grinding tool comprises a metal base body, and a mounting hole coaxial with the axis of the base body is formed in the center of the base body; a grinding surface is arranged on the base body, and diamond particles are fixedly arranged on the grinding surface through a brazing layer; the production process comprises the following steps: coating a low-temperature volatile adhesive on a substrate and adhering brazing filler metal alloy powder, then coating the brazing filler metal alloy powder with the low-temperature volatile adhesive again, covering the brazing filler metal alloy powder with a high-temperature-resistant ceramic plate provided with a plurality of through holes with the diameter D of 1.05 d5d (d is the diamond particle size), and quickly spreading diamond particles with corresponding specifications, and finally, a profiling pressing plate is pressed and covered, and precise positioning of the base body, the brazing filler metal and the diamond is formed. According to the technical scheme provided by the invention, the problem of uneven distribution of grinding materials in the grinding tool is fundamentally solved, and then real uniform and patterned distribution is realized, so that each diamond is uniformly stressed in the grinding process of the grinding tool, and local overheating and abnormal wear are avoided.

The invention relates to an alloy for stainless steel brazing and a brazing joint. More specifically, the present invention relates to an alloy for stainless steel brazing and a brazed joint, which are preferably applicable to brazing between stainless steel pipes of the same type or between stainless steel pipes and copper pipes of different types.

A method for forming a rotatable cutting bit involves inserting a mass of brazing alloy into a first cavity in a tool body, with a portion of the alloy protruding. A cutting tip is mounted onto the tool body by aligning a second cavity of the cutting tip with the protruding portion of the alloy. The first cavity and the second cavity are keyed into coaxial alignment with the bit's central longitudinal axis by the mass of brazing alloy. The cutting tip is then brazed to the tool body with the mass of brazing alloy. During brazing, the alloy extends into a gap defined between the tool body and the cutting tip. The assembly may be heated in a furnace to melt the alloy into the gap to ensure a secure bond.

The present invention relates to a braze alloy composition including in weight %:80⁢ to 97.98 Cu;2.≤Ge≤9.5;0.02<B≤1.25;andincidental impurities.The braze alloy composition includes no more than 0.4 wt % Sn.

This invention relates to a nickel-based superalloy brazing adhesive tape, its preparation method, and its application, belonging to the field of superalloy vacuum brazing technology. The adhesive tape consists of 90%–95% alloy brazing alloy powder and the remainder an organic binder. The organic binder is an epoxy-based binder, composed of epoxy resin, a composite amine curing agent, a compound tackifier, and a reactive toughening agent. During preparation, the above components are stirred and mixed evenly, rolled into a tape, and then cured and packaged to obtain the adhesive tape. The thickness of this adhesive tape can be adjusted within the range of 0.1–2 mm, exhibiting good flexibility and a shelf life exceeding 12 months. During brazing, the organic binder completely volatilizes within the range of 350–550°C, leaving no residue. The wetting angle between the brazing alloy and the base material is less than 20°, enabling high-quality connections in complex structures. This invention features a simple preparation process, is environmentally friendly, produces low residual carbon after welding, and results in a uniform joint structure and excellent mechanical properties, meeting the technical requirements for vacuum brazing of nickel-based superalloy components in aerospace and other fields.

The present invention relates to a brazing alloy composition comprising, in wt. %: 80 to 97.98 Cu; 2.0 ≤ Ge ≤ 9.5; 0.02 < B ≤ 1.25; and accidental impurities. The brazing alloy composition contains no more than 0.4 wt.% Sn.

Additive particles are introduced to a braze joint by combining the additive particles with a flux and using the flux with additive particles to form a core or coating of a braze product including braze alloy and flux. Additive particles are selected to provide some improvement to the finished braze joint that cannot be achieved by combining the additive particles directly into the braze alloy. Methods of brazing include application of vibration to a braze joint while the braze joint is maintained at a brazing temperature. Vibration applied to the materials being joined is transmitted through the flux, molten braze alloy and additive particles, producing a braze joint of increased strength and uniformity.

This invention provides a stainless steel brazing alloy that has good wire drawing properties, is inexpensive, and possesses excellent brazing capabilities, as well as a brazing joint using the same. [Solution] A stainless steel brazing alloy comprising, by weight %, Zn: 36-42%, Ag: 3-6%, P: 0.2% or less (including 0%), Al: 0.01-0.3%, with the remainder being Cu and other unavoidable impurities, and further containing Ni: 0.01-0.3% and Mn: 0.01-0.3%, characterized in that the brazing alloy is used when brazing between pipes of the same type of stainless steel or between pipes of different types of stainless steel and copper.

The invention discloses a novel composite brazing alloy material which is composed of four metal elements of Ag, Cu, In and Ni, and the mass percent range of the brazing alloy material is 50%-65% of Ag, 25%-35% of Cu, 5%-15% of In and 0.5%-5% of Ni. By optimizing brazing alloy components, the use amount of precious metal silver is reduced, so that the use cost is reduced, and meanwhile, the vacuum welding strength of nickel-plated metal ceramic and copper or iron-nickel alloy is enhanced. According to the brazing alloy, the welding temperature is reduced by adding indium (In), the solid-liquid temperature difference is reduced, the wettability is improved, the welding strength is enhanced by adding nickel (Ni), interface corrosion is inhibited, the binding force of a thin nickel plating layer is stabilized, and the process adaptability and the welding reliability can be considered through cooperation of indium and nickel.

A braze alloy composition for forming braze joints between components of, for example, an x-ray tube is disclosed, said composition being configured to have a solidification / melting temperature range

The present invention relates to a brazing alloy composition comprising, in wt%: 80 to 97.98% of Cu; 2.0 < = Ge < = 9.5; the volume is 0.02 lt; b < = 1.25; and incidental impurities. The brazing alloy composition includes no more than 0.4% Sn.

A method for manufacturing a semiconductor glass substrate having a brazing adhesive layer, and a semiconductor glass substrate are disclosed. The disclosed method for manufacturing a semiconductor glass substrate comprises the steps of: preparing a glass core; forming a brazing adhesive layer on the surface of the glass core by using a brazing alloy having a melting point lower than that of the glass core; forming an electrode layer on the brazing adhesive layer by using a conductive metal having a melting point higher than that of the brazing alloy; and performing heat treatment at a temperature greater than or equal to the eutectic point of the brazing alloy so that the brazing adhesive layer mediates strong interlayer bonding between the glass core and the electrode layer.

This invention relates to a high thermal conductivity flexible high-temperature brazing alloy, its preparation method, and its application. The brazing alloy, by mass, comprises 10 parts of brazing alloy matrix powder, 0.03-0.09 parts of high thermal conductivity reinforcing phase powder, 10-15 parts of solvent, 0.5-0.6 parts of dispersant, 1-1.5 parts of binder, and 0.7-1 parts of plasticizer. The preparation method includes: Step 1: mixing the brazing alloy matrix powder, high thermal conductivity reinforcing phase powder, dispersant, and solvent evenly; Step 2: adding the binder and plasticizer, mixing evenly to obtain a brazing alloy slurry; Step 3: ultrasonically defoaming the brazing alloy slurry; Step 4: casting the defoamed brazing alloy slurry into a film, and drying it to obtain a high thermal conductivity flexible high-temperature brazing alloy. The application is the use of the brazing alloy in vacuum brazing. The brazing alloy of this invention possesses high thermal conductivity and mechanical properties, is suitable for welding complex thermal structures at high temperatures, and is in thin film form, making it easy to precisely control the amount added during welding.

Hermetic thermocouple harnesses for solid oxide electrochemical systems include a harness having a feedthrough washer including two metal disks with holes circumferentially disposed about the disks and a braze alloy layer between the disks. Thermocouples are fed through the feedthrough washer, and induction brazing is used to seal and bind the disks and the thermocouples together. The feedthrough washer is welded to the base of the hotbox, forming a hermetic seal while allowing the thermocouples to extend between the interior and exterior of the hotbox. A second harness includes a main body, a top tube, and a sealant end having holes. Thermocouples extend from the interior of the hotbox, through the top tube, main body, and through the holes of the sealant to the exterior of the hotbox. Clearance between the thermocouples and their respective holes are closed with glass seals, and the top tube is filled with putty.

A Nickel base Brazing Filler Metal (BFM) includes about 12 to 16 wt % Chromium (Cr); up to about 5 wt % Fe; up to about 2 wt % Mo; about 1 to 5 wt % Tungsten (W); about 3 to 6 wt % Aluminum (Al), about 3 to 6 wt % Tantalum (Ta); about 0.05 to 1.5 wt % Hafnium (Hf), about 0.01 to 0.1 wt % Carbon (C); about 0.005 to 0.05 wt % Zirconium (Zr); about 0.005 to 0.05 wt % Silicon (Si); about 0.01 to 0.05 wt % of the sum of rare earths such as Sc, Yttrium (Y), the actinides and the lanthanides; about 1.7 to 2.6 wt % Boron (B); the balance being essentially Nickel (Ni) and unavoidable impurities. Its use for high strength Transient Liquid Bonding (TLB) brazing by use of capillary action on gamma prime strengthened Nickel base Superalloys in the 1180 to 1220° C. range as part of production and repair processes for hot gas path components.

A method for forming a rotatable cutting bit involves inserting a mass of brazing alloy into a first cavity in a tool body, with a portion of the alloy protruding. A cutting tip is mounted onto the tool body by aligning a second cavity of the cutting tip with the protruding portion of the alloy. The first cavity and the second cavity are keyed into coaxial alignment with the bit's central longitudinal axis by the mass of brazing alloy. The cutting tip is then brazed to the tool body with the mass of brazing alloy. During brazing, the alloy extends into a gap defined between the tool body and the cutting tip. The assembly may be heated in a furnace to melt the alloy into the gap to ensure a secure bond.

Disclosed are a method for manufacturing a glass substrate for a semiconductor and a glass substrate for a semiconductor. The method for manufacturing a glass substrate for a semiconductor comprises the steps of: preparing a glass core; forming a pattern on the glass core by using a photosensitizer; forming a groove corresponding to the pattern by etching a glass core surface that is not protected by the photosensitizer; forming a brazing adhesive layer having a specific thickness in the groove by using a brazing alloy having a lower melting point than the glass core; forming an electrode by filling the groove having the brazing adhesive layer with a conductive metal having a higher melting point than the brazing alloy; and performing a heat treatment under specific conditions such that the brazing adhesive layer formed in the groove mediates the coupling of the glass core and the electrode from between the glass core and electrode.

The invention provides a finned tube (1) for a heat exchanger, comprising a flat tube (2) onto which is brazed at least one serpentine-shaped fin (3). The flat tube (2) is made of a ferrous material that is covered on its outer surface with a first layer (4B) of an aluminum alloy. At least a part of the first layer (4B) of the aluminum alloy is covered with a second layer (4C) of an aluminum brazing alloy. The serpentine-shaped fin (3) comprises an aluminum alloy and is brazed on at least a part of an outer surface of the flat tube (2). The invention also provides a heat exchanger comprising an assembly of a plurality of such finned tubes and a method to manufacture such a finned tube (1).

The present invention relates to a method for manufacturing a hairpin winding of a stator of an electric motor for powering a motor vehicle. First, a stator body with a plurality of stator slots is provided. Then, hairpins (1) are arranged in the stator slots such that free hairpin ends (2) of the hairpins (1) protrude axially from the stator body. One of the free hairpin ends (2) is connected to a conductor (3). Finally, the free hairpin end (2) is connected to the conductor (3) by brazing. According to the invention, a brazing alloy (4) is applied to the free hairpin end (2) before connecting the free hairpin end (2) to the conductor (3).

An insulated joint for forming an electrical boundary between the rails of a railroad track that is resistant to decay resulting from track forces. The insulated joint includes a ceramic material brazed directly to the ends of adjacent rails by a brazing material or by active soldering. The insulated joint provides a mechanical connection as well as electrical insulation between the adjacent rails and does not require any glue or epoxy and employs insulating materials. Because of the continuous mechanical connection, the insulated joint is robust to train movement and forces applied to the rails, and thus avoids flexing as well as degradation of the joint and rail. The ceramic material may be Yttria-stabilized zirconia (YSZ) and the brazing material may be a high-purity active braze alloy of silver, copper, indium and titanium