摘要:
A process for welding superalloys, and particularly articles formed of gamma prime-strengthened nickel-base superalloys whose chemistries and/or microstructures differ. The process entails forming the faying surface of at least one of the articles to have a cladding layer of a filler material. The filler material may have a composition that is different from both of the articles, or the same as one of the articles. The cladding layer is machined to promote mating of the faying surfaces, after which the faying surfaces are mated and the articles welded together. After cooling, the welded assembly is free of thermally-induced cracks.
摘要:
Disclosed is a method to provide a transient liquid phase solder joint by annealing and quenching. The invention allows the attainment of a single phase solder joint at room temperature which will not reflow in subsequent thermal processing above the initial reflow temperature and thus obviates the need for a solder material hierarchy.
摘要:
A device integration method involves attaching two components together using a first material having a first melting point, then creating a unit by attaching the two components to a third component, using a second material having a second melting point lower than the first melting point, and then attaching the unit to another component, using a third material, having a third melting point lower than the second melting point. A device having multiple components attached together using a process described herein.
摘要:
A HVOF process is used for applying brazing materials to repair surfaces of a substrate such as a turbine blade. The brazing material is applied in powdered form and is free of binders and adhesives. The brazing materials may be any one or more of a nickel based, cobalt based or ferrous based high temperature brazing material. Alloys of these elements may be used together with a temperature depressing melting point element such as boron or silicon.
摘要:
A method for joining a multiplicity of multi-alloy solder columns to an electronic substrate and the structure formed by such method are disclosed. In the method, a mold plate equipped with a multiplicity of cavities is first filled by an injection molded solder technique with a high temperature solder forming a multiplicity of solder columns. The mold plate is then sandwiched between an extraction plate and a transfer plate by utilizing a multiplicity of displacement means equipped in the extraction plate to displace the multiplicity of solder columns from the mold plate into a multiplicity of apertures equipped in the transfer plate. The multiplicity of cavities in the transfer plate each has a straight opening and a flared opening. The flared opening is then filled with a low temperature solder paste to encapsulate one end of the high temperature solder column. The low temperature solder paste is then reflown on top of a conductive pad on an electronic substrate at a temperature lower than the melting temperature of the high temperature solder to form a bond between the solder column and the conductive pad.
摘要:
A filler wire for laser-welding an aluminum alloy is described, which comprises a base material of Aluminum-Silicon based alloy and a flux of Aluminum-Potassium-Fluorine-based composition. The amount of the flux in the base material is greater than 0 (zero) wt. % and less than approximately 1.0 wt. %.
摘要:
Disclosed is a basic flux cored wire having a mild steel or an alloy steel sheath filled with flux, characterized in that the flux essentially consists of, with respect to the total weight of the wire: 0.3 to 3.0% Ti and Ti oxide (TiO2-converted value); 1.0 to 2.5% Si and Si oxide (SiO2-converted value); 0.1 to 1.5% Mg and Mg oxide (MgO-converted value); 1.5 to 4.0% Mn and Mn oxide (MnO-converted value); 0.2 to 1.5% Al and Al oxide (Al2O3-converted value); 0.1 to 1.0% Zr and Zr oxide (ZrO2-converted value); 0.2 to 3.5% CaF2; and 0.01 to 0.5% K2O, with the proviso that the components satisfy the basicity of 0.5 to 4.5 in the basicity equation (1) defined as Bnull(CaF2nullMgOnullMnOnullK2O)/(TiO2nullSiO2nullAl2O3nullZrO2). The basic flux cored wire of the present invention is excellent in crack resistance and low temperature toughness, and exhibits excellent welding workability in all welding positions, ensuring an improvement in the efficiency of welding work. Furthermore, the basic flux cored wire according to the present invention exhibits excellent welding workability even under a shield gas of 100% CO2.
摘要:
An article, such as an airfoil having a melting temperature of at least about 1500null C. and comprising a first piece and a second piece joined by a braze to the first piece. The first piece comprises one of a first niobium-based refractory metal intermetallic composite and a first molybdenum-based refractory metal intermetallic composite, and the second piece comprises one of a second niobium-based refractory metal intermetallic composite and a second molybdenum-based refractory metal intermetallic composite. The braze joining the first piece to the second piece comprises a first metallic element and a second metallic element, wherein the first metallic element is one of titanium, palladium, zirconium, niobium, and hafnium, and wherein the second metallic element is one of titanium, palladium, zirconium, niobium, hafnium, aluminum, chromium, vanadium, platinum, gold, iron, nickel, and cobalt, the first metallic element being different from the second metallic element. This abstract is submitted in compliance with 37 C.F.R. 1.72(b) with the understanding that it will not be used to interpret or limit the scope of or meaning of the claims.
摘要:
An elastomeric device for electrically interconnecting two or more components, and a method for making the device. The device comprises an elastomeric matrix having one or more outer surfaces, and one or more electrically conductive pathways through the matrix, wherein at least a portion of the electrical pathway contains a material that is an electrically conductive liquid at the elastomeric device's operating temperature.
摘要:
Disclosed herein is a surface treatment agent for steel, characterized in that, said agent contains 0.1-15% by mass of chromium sulfate and 10-40% by mass of a binder resin containing butyral resin or a mixture of butyral resin with another resin which is compatible with butyral resin.