575 results about "Corrosion resistant alloy" patented technology

High strength cables formed from strength members. The strength members are formed from bimetallic filament wires which may be encased within a jacket of polymeric material. The bimetallic filament wires wherein the filaments include a high strength core and a corrosion resistant alloy clad forming the outer layer of the filament. The strength members may be used individually, as a central strength member, or even layered around a central axially positioned component or strength member, to form a layer of strength members. Cables of the invention may be of any practical design, including monocables, coaxial cables, quadcables, heptacables, slickline cables, multi-line cables, suspension cables, and the like.

The invention relates to an ultra pure electroslag remelting method for a high-performance corrosion resistant alloy, and the method comprises the following steps of: preparing the following ingredient components of a self-fluxing electrode bar in parts by weight: 25-34 parts of Ni, 25-29 parts of Cr, 2.5-4.5 parts of Mo and 30-45 parts of Fe, and carrying out vacuum induction melting, so as to obtain the self-fluxing electrode bar; slowly melting the self-fluxing electrode bar in melted electroslag remelting slag charge comprising the following components in parts by weight: 55-80 parts of CaF2, 5-25 parts of CaO, 5-15 parts of Al2O3 and 5-10 parts of MgO, purifying, and recrystallizing in a crystallizer, so as to obtain an electroslag ingot; and forging the electroslag ingot into a bar material at the temperature of 1130+/-5 DEG C, and carrying out solution treatment, so that the high-performance corrosion resistant alloy is obtained. By utilizing the ultra pure electroslag remelting method provided by the invention, the content of harmful elements such as sulphur and phosphorus in the alloy can be reduced, the impurity distribution of the alloy is improved, fining of structure can be facilitated, and the hot workability and yield of the alloy can be improved.

A method of producing a seamless, tubular product includes centrifugally casting a corrosion resistant alloy into a tubular workpiece having an inner diameter and an outer diameter. The method then removes material from the inner diameter of the workpiece and subjects the workpiece to at least about a 25% wall reduction at a temperature below a recrystallization temperature of the workpiece using a metal forming process. The metal forming process includes radial forging, rolling, pilgering, and/or flowforming.

A combinatorial heterogeneous-homogeneous reactor configuration in which an array or groups of homogeneous fuel assemblies are interlinked together in a heterogeneous lattice. The present invention removes the limitation of a homogeneous reactor by providing a reactor concept that utilizes the inherent advantages of homogeneous fuel elements but in a heterogeneous fuel lattice arrangement that limits the power density of any one homogeneous fuel element and yet forms a reactor arrangement that is capable of producing any product demand of interest. The present invention provides a method for producing medical isotopes by the use of a modular reactor core comprised of homogeneous fuel assemblies arranged in a regular rectangular or triangular pitch lattice. The aqueous fuel solution is contained within individual fuel assemblies that are right circular cylinders clad in corrosion-resistant alloys such as stainless steel, zircalloy, zircalloy alloys, or other metal alloys that are resistant to corrosive fissile environments but preserve neutron economy. The fuel assemblies are supported below by a core plate that is tied directly to the lower reactor support structure. The bottom of each assembly opens into a common plenum area which provides a hydrodynamic communication/coupling path between the individual assemblies in the lattice. The fuel assemblies are supported above by an upper plate that is welded to each assembly tube. The top of each assembly opens to a common upper plenum which provides a means of thermodynamic pressure equalization among the four assemblies in the reactor core lattice.

Disclosed are electric cables with improved armor wires used with wellbore devices to analyze geologic formations adjacent a wellbore. The cables include at least one insulated conductor, and one or more armor wires surrounding the insulated conductor. The armor wires include a low density core surrounded by a corrosion resistant alloy clad, where the alloy clad includes such alloys as beryllium-copper based alloys, nickel-chromium based alloys, superaustenitic stainless steel alloys, nickel-cobalt based alloys, nickel-molybdenum-chromium based alloys, and the like. The low density core may be based upon titanium or titanium alloys. The cables of the invention may be any useful electric cable design, including monocables, quadcables, heptacables, quadcables, slickline cables, multiline cables, coaxial cables, or seismic cables.

The invention provides a high-hardness, wear-resistant and corrosion-resistant alloy of an amorphous/nanocrystal matrix and a preparation method of the high-hardness, wear-resistant and corrosion-resistant alloy. The high-hardness, wear-resistant and corrosion-resistant alloy of the amorphous/nanocrystal matrix comprises the following elements in percentages by mass: 9.0-12.0 of Cr, 2.6-2.9 of B, 0.7-0.9 of C, 0.4-0.8 of Nb, 0.4-0.8 of V, less than 0.3 of Mn, less than 0.07 of Si, less than or equal to 0.01 of S and P, and the balance of Fe, wherein the sum of C and B is 3.3-3.6; the content ratio of C/Cr is 0.06-0.08; and the sum of Nb and V is 0.5-1.0. Through multi-component alloying, an eutectic composition is formed, the melting point is low, fluidity is good, requirements of a casting technology are simple, large wear-resistant and corrosion-resistant castings can be cast, and small precision wear-resistant and corrosion-resistant castings can also be produced. The hardness of the alloy is HRC66-70, and impact toughness of the alloy is 4-9 J/cm (2).

The invention belongs to the field of magnetic material, relating to an electromagnetic shielding material and the making method thereof. The invention is a composite metallic film formed on a conductive substrate by multiple deposition in the water solution, and the obtained composite metallic film is 1-100 mum thick, and each layer of the composite metallic film is 1.1-99.9 mum thick, and the combination between the layers of the composite film is by chemical bond, and each layer is layered. The substrate can be stainless steel, copper plate, Ti plate, Al plate or one of the corrosion-resistant alloy plates, and also made of conductive glass, conductive plastics, polymer high molecular material, or other material; the composite metallic film comprises two or above different metallic film layers; each metallic film layer can be of copper, iron, iron-nickel alloy, nickel-cobalt alloy, iron-cobalt alloy or iron-cobalt-nickel alloy. The invention can shield the frequencies between 50Hz and 100 Hz and the shielding efficacy reaches above 70dB.

The invention discloses a composite tube and a manufacture method thereof. The composite tube comprises a base tube (1) and a corrosion-resistant alloy liner tube (2) mechanically combined in the base tube, wherein a corrosion-resistant alloy surfacing layer (3) is arranged at the inner circumference of the end part of the base tube, the inner end face of the corrosion-resistant alloy surfacing layer (3) is connected with the end face of the corrosion-resistant alloy liner tube (2), and the axial length of the corrosion-resistant alloy surfacing layer (3) is not less than the distance between the end face of the corrosion-resistant alloy liner tube (2) and the end face of the base tube (1). The manufacture method comprises the following steps of: S1, mechanically combining the corrosion-resistant alloy liner tube (2) in the base tube (1); S2, removing the corrosion-resistant alloy liner tube (2) (with certain length) at the end part of the composite tube; and S3, forming the corrosion-resistant alloy surfacing layer (3) on the inner circumference of the end part of the base tube (1) from inside to outside in a surfacing manner from the end part of the corrosion-resistant alloy liner tube (2). According to the composite tube, the problems of large welding difficulty, low welding qualified rate and low speed of the dual-metal mechanical composite tube are solved.

The problem addressed by the present invention is to provide an apparatus for preparing ultrathin graphene pieces capable of preparing ultrathin graphene pieces in which less than 10 pieces of graphene are overlapped in large quantities, a method for preparing ultrathin graphene pieces capable of preparing the ultrathin graphene pieces with high yield, an ultrathin graphene piece in which less than 10 pieces of graphene are overlapped, a capacitor having high performance by using the ultrathin graphene piece as an electrode, and an efficient method of manufacturing the capacitor. The above-described problem can be solved by using an apparatus 20 for preparing ultrathin graphene pieces, the apparatus comprising: a graphite electrode 21; a counter electrode 22 which is made of graphite, a corrosion resistant alloy, or a precious metal; an electrolytic solution 25 in which one end sides of the two electrodes 21 and 22 are immersed; a container 24 which stores the electrolytic solution 25; and a power source 28 which is connected to the two electrodes 21 and 22 via wirings 26 and 27. The apparatus is also provided with a porous filter 23 so as to cover at least the immersed part of the graphite electrode 21 that is immersed in the electrolytic solution 25.

The invention relates to a high-obdurability corrosion-resistant age hardening nickel-based alloy, which is composed of Ni, Cr, Mo, Nb, Ti, Al, V, Zr, B, Mg, (Ti+Al)/Nb, C, Si and Fe. The alloy is obtained by a direct ageing heat treatment method. The alloy provided by the invention has the characteristics of high strength, good ductility and toughness, excellent corrosion resistance and the like just the same as those of the existing nickel-based corrosion-resistant alloy; and compared with the existing nickel-based corrosion-resistant alloy, the alloy provided by the invention is better in thermoplasticity, lower in hot processing difficulty and better in integrated processing properties, and also lower in process cost. The alloy provided by the invention can be used as the material of equipment for high temperature and high pressure high-sulfur oil and gas exploitation.

The invention relates to a novel bimetallic composite pipe, which is applied in exploiting oil and natural gas fields. The novel bimetallic composite pipe is characterized in that an inner lining pipe is arranged in an outer wall pipe. Short joints are welded at both ends of the outer wall pipe, welding seams are arranged between the outer wall pipe and the short joints, and both end parts of the inner lining pipe are welded on the inner wall of the short joints. At least 1 through hole with the diameter of 2 to 10 millimeters is drilled on the wall of the outer wall pipe. Electric welding is adopted to completely weld the through hole after the water pressure test, namely, electric welding is used for solidly filling the through hole after the water pressure test. Screw threads are machined at both ends of the novel bimetallic composite pipe or the both ends of the novel bimetallic composite pipe are machined into two welding grooves. The novel bimetallic composite pipe has the advantages that a carbon steel pipe or a low alloy steel pipe is adopted as the substrate material of the outer wall pipe, to exert the superior capability of mechanics of machinery and the low price characteristic of the carbon steel pipe or the low alloy steel pipe; the inner lining adopting layer corrosion resistant alloy is provided with excellent corrosion resistant capability and superior capability of mechanics of machinery. The screw threads coupling connection sealing problem and the bimetallic composite pipe ground welding problem occurring when the prior bimetallic composite pipes are in use are thoroughly solved, the application field of the bimetallic composite pipe is enlarged, and the cost of the oil field exploitation is saved.

The invention relates to Ni-based corrosion resistant alloy for a high-acidity oil-gas field and a manufacturing method of an oil casing of the Ni-based corrosion resistant alloy for the high-acidity oil-gas field. The Ni-based corrosion resistant alloy comprises the following chemical components by weight percent: smaller than or equal to 0.03% of C, 21.0-24.0% of Cr, 18.0-20.0% of Fe, 7.0-9.0% of Mo, 1.5-2.0% of Cu, smaller than or equal to 3.0% of Co, smaller than or equal to 3.0% of W, smaller than or equal to 0.50% of Nb and Ta, smaller than or equal to 0.50% of Ti, smaller than or equal to 0.5% of Si, smaller than or equal to 0.5% of Mn, smaller than or equal to 0.003% of S, smaller than or equal to 0.005% of P, and smaller than or equal to 0.012% of N, wherein the total amount of (Mo+0.5*W) is 7.0-10.0%, and the numerical value of (Ti/6+(Nb+Ta)/8)/(C+N) is greater than or equal to 1 and smaller than or equal to 2. The manufacturing method comprises the following steps: I smelting, to be specific, smelting electroslag refining ingots; II tube blank processing; III tube making including hot-extrusion, reaming and solution treatment, wherein the grain size of a crude tube is 4-7 grade, the hot-extruded crude pipe is cold-rolled into a finished seamless tube, the total cold-rolling pass deformation amount is 30-61%, the cold-rolling speed is 25-35 times/min. The Ni-based corrosion resistant alloy and the oil casing manufactured are excellent in corrosion resistance.

A riser tensioner cylinder rod incorporates a thin, corrosion-resistant alloy tube over a pre-machined steel alloy rod. The tube is swedged at one end and expanded to the inner surface of a split die. A gradual tapered surface on a stretching die provides a smooth transition during a stretching process for the tube. A pressurizing vessel traps an outer lip of the pre-swedged tube. Pressurized fluid in the vessel simultaneously causes the tube to expand and force the rod into the tube inner diameter. At the completion of the process, the pressurizing vessel is removed. The stretched tube is parted off at both ends and the stretching die is removed from the rod to complete the assembly.

The invention discloses an electrolytic corrosion agent capable of displaying a nickel-based corrosion-resistant alloy metallographic structure and a corrosion method thereof and belongs to the technical field of metallographic electrolysis corrosion. The electrolytic corrosion agent comprises 40-60g of oxalic acid, 120-180g of glycerol and 400-500ml of deionized water. The corrosion method comprises the following steps: (1) preparing an electrolytic corrosion agent; (2) grinding a to-be-corroded nickel-based corrosion-resistant alloy by waterproof abrasive paper, then polishing the alloy by using a diamond polishing agent; (3) pouring the electrolytic corrosion agent prepared by the step (1) into an electrolytic corrosion instrument to carry out electrolytic corrosion; and (4) taking a sample out of the corrosion agent, washing the sample by using absolute ethyl alcohol and then airing. The electrolytic corrosion agent is simple in formula, free of toxicity and free of pungent smell; the damage to health of experimenters can be greatly reduced; the electrolytic corrosion agent is hard to volatilize, can be stored for a long time and can be reused, is good in corrosion effect and is capable of clearly displaying the nickel-based corrosion-resistant alloy metallographic structure.

A corrosion-resistant alloy metal tube sheet used to construct a shell and tube heat exchanger (50) for cooling fluids with sea water passing through corrosion-resistant alloy tubes (25) contained in a horizontal carbon steel outer shell (1) that are supported and sealed at each end by passing them through holes (27, 30) in a carbon steel tube sheet (28, 31) and axially aligned holes (36, 37) in alloy tube sheets (34, 35) that cover and protect the adjacent interior carbon steel tube sheets from sea water corrosion. The walls of the holes (27, 30, 36, 37) have at least one annular groove (45, 46) and the ends of each tube are radially expanded to form circumferential ridges (40, 41) on the outside of each tube at a mating location with each of said annular grooves (45, 46) where they are forcibly driven into the grooves to form a circumferential joint having good mechanical strength and water tightness, thereby eliminating the need for welding the external joint between the alloy tube sheets and alloy tubes.

The invention discloses a welding method of a stainless steel lining composite board. The welding method comprises the steps that double V-shaped grooves are formed; welding is carried out on the bottom of the V-shape groove in one side of a carbon steel layer by adopting MAG welding, and a pre-welding joint is formed; welding is carried out on a groove between the V-shaped groove in one side of acorrosion-resistant alloy layer and the V-shape groove in one side of a carbon steel layer by adopting plasma welding, laser welding or TIG, and a base layer inner weld joint is formed; welding is carried out on exterior of the pre-welding joint on one side of the carbon steel layer by adopting submerged arc welding to form a base layer outer weld joint; welding is carried out on the bottom of the V-shaped groove at one side of the corrosion-resistant alloy layer by adopting the MAG or the TIG, and a transition layer welding joint is formed; and welding is carried out on the exterior of the transition layer welding joint by adopting the MAG or the TIG, and a composite welding joint is formed. According to the welding method, through the matching of the reasonable groove design and the welding process, high-quality and efficient welding of the stainless steel lining composite board is achieved, the performance is excellent, automatic production is easy to realize, and the wide market prospect is achieved.

A method of laying a pipeline is described in which both internal and external weld passes are performed in order to weld together the pipe sections. The method includes arranging a pipe section adjacent to the end of a pipeline thereby defining a circumferential joint to be welded, performing an external weld pass, with for example GMAW—MIG torches, on the root of the joint to be welded during which weld material is deposited in the root of the joint to be welded, thereby forming a root weld, and then performing an internal weld pass, with for example a GTAW—TIG torch, on the root weld during which the root weld is melted and re-shaped. The method has particular application in relation to pipes clad with corrosion resistant alloy.

A corrosion-resistant coated base metal coated with a corrosion resistant alloy. The corrosion resistant alloy includes tin and zinc. The corrosion resistant coated base metal includes a heat created intermetallic layer primarily including copper and zinc.

A Ni—Fe—Cr alloy having high strength, ductility and corrosion resistance especially for use in deep-drilled, corrosive oil and gas well environments, as well as for marine environments. The alloy comprises in weight %: 35-55% Ni, 12-25% Cr, 0.5-5% Mo, up to 3% Cu, 2.1-4.5% Nb, 0.5-3% Ti, up to 0.7% Al, 0.005-0.04% C, balance Fe plus incidental impurities and deoxidizers. The alloy must also satisfy the ratio of (Nb-7.75 C)/(Al+Ti)=0.5-9 in order to obtain the desired high strength by the formation of γ′ and γ″ phases. The alloy has a minimum of 1% by weight γ″ phase dispersed in its matrix for strength purposes and a total weight percent of γ′+γ″ phases being between 10 and 30.

The invention discloses a hydrostatic pressure expanding composite technology for a bimetal composite pipe. On the theoretical basis of the metal material elastoplastic theory, a residual contact stress calculation system between two layers of pipelines is finally obtained after hydraulic expanding force and expanding compounding technology are built for guiding to select the hydraulic expanding force and evaluate the compounding technology. The invention aims to provide the hydrostatic pressure expanding composite technology for the bimetal composite pipe, which is used for the production technology of the bimetal composite pipe with big caliber, long pipeline and the thick corrosion resistant alloy layer of which the maximum thickness can be 8.00mm.