259 results about "Fernico" patented technology

A method of and novel composition for transient liquid phase bonding of refractory metal structures is described herein. Preferably, the composition comprises a first component substantially similar to the composition of the refractory metal structure, and a second component having a lower melting temperature than the first component comprising a metallic constituent selected from the group consisting of iron, nickel and cobalt. The second component acts as a melting point depressant to temporarily lower the melting point of the first component so that the join can be accomplished without melting the structure itself. Upon applying the composition to the surfaces of refractory metal structures in need of joining, the assembly is heated to a eutectic point defined as the lowest melting point of the composition. A localized liquid region is formed at the interface of the two structures which solidifies when the second component diffuses into the structures such that the region becomes increasingly refractory thereby solidifying into a substantially refractory joint.

The invention belongs to the field of iron nickel-based martensite precipitation hardening-type alloys, and in particular relates to deformation induced maraging stainless steel with high strength, high toughness and high corrosion resistance and a machining process thereof. The stainless steel is a novel material mainly applied to the important fields of aviation, spaceflight, machinofacture, atomic energy and the like. The steel comprises the following components in percentage by weight: 11.0-13.0 percent of Cr, 11.0-14.0 percent of Ni, 1.5-2.1 percent of Ti, 0.1-1.0 percent of Mo, 0.5-2.0 percent of Cu, 1.5-2.2 percent of Co, 0.5-1.5 percent of Mn, 0.1-1.0 percent of Si, 1.0-2.0 percent of Al, less than 0.01 percent of Nb, less than 0.01 percent of C, less than 0.01 percent of N, less than 0.01 percent of V and the balance of Fe. The machining process comprises the following steps of: (1) heating and forging in an austenite single phase zone, and air-cooling to the room temperature after the forging is ended, wherein the forge and press ratio is 6-9; (2) hot-rolling after the forging is ended and air-cooling to the room temperature after the rolling is ended, wherein the blooming temperature is 1100-1200 DEG C, and the finished rolling temperature is 800-900 DEG C. The invention obtains a martensite matrix with high-order dislocation density through deformation induced martensite phase change and simultaneously obtains high strength, high toughness and high corrosion resistance through adding the proper matching of precipitation strength elements, such as Ni, Ti, Mo, Cu and the like.

The invention relates to a hard alloy welding wire or welding rod. The welding wire or welding rod is prepared from the following compositions: tungsten carbide, titanium carbide or tungsten carbide and titanium carbide is used as a hard phase; one, two or three of iron, nickel and cobalt are used as a bonding phase; specific compositions have the following weight percentage accounting for the gross weight: 30 to 85 percent of the hard phase and 15 to 70 percent of the bonding phase; and in the mixture ratio of the hard phase or the bonding phase, the hard phase or the bonding phase comprises one or more of chrome, manganese, copper, molybdenum, vanadium, tantalum, niobium and carbide accounting for less than 15 percent of the gross weight and C with proper amount is added. The hard alloy welding wire or welding rod has the advantages of high rigidity, high wearing resistance, impact resistance, corrosion resistance, easy welding, low cost, simple operation and wide application range.

The invention relates to a soft magnetic composite material for an integrated injection molded inductor and a preparation method thereof. The preparation method comprises the following steps: (1) utilizing one of manganese zinc ferrite magnetic powder, carbonyl iron powder, ferrum silicon chromium, ferrum silicon aluminum, cerium ferrum nitrogen and ferrum nickel soft magnetic powder to be meltedand mixed with thermoplastic macromolecule resin to obtain the soft magnetic composite material for the inductor; (2) putting a wound enameled wire coil into a mold cavity of an injection mold, then melting the soft magnetic composite material prepared in the first step, injecting into the mold by an injection molding machine to completely wrap the coil which is arranged in the mold in advance toobtain an inductor device and opening the mold after cooling to obtain the integrated injection molded inductor. Compared with a traditional inductor preparation method and raw materials thereof, theinductor prepared from the soft magnetic composite material disclosed by the invention has the characteristics of simple work procedures, high production efficiency, good sealing performance of inductor products, long service life and low cost.

The invention discloses a method for removing hexavalent chromium in water by using a biochar-loaded nanometer iron-nickel composite material, and relates to a remediation method for heavy metal pollution in a water body. According to the invention, the biochar-loaded nanometer zero-valent iron-nickel bimetallic composite material is prepared in one step by using a simplified biochar-supported bimetallic material preparation process without the use of a high-cost strong reducing agent, and is applied to removal of Cr (VI) in water, so that the problems of easy surface passivation, low reactionactivity and low utilization rate in the treatment of heavy metals in a water body with nanometer zero-valent iron; and the method has advantages of low cost, simple operation and no secondary pollution, and the Cr (VI) removal activity and the stability of the biochar-loaded iron-nickel bimetallic material are higher than the Cr (VI) removal activity and the stability of the biochar-loaded nanometer zero-valent iron material.

The present invention is one kind of composite hot sprayed Ti-Fe-Ni-C powder capable of forming composite TiC/Fe-Ni alloy coating and its preparation process. The composite Ti-Fe-Ni-C powder containing Ni in the amount of 32-45 wt% of Fe+Ni content and Ti+C in over 70 wt% is prepared with sucrose as the precursor of C. The TiC/Fe-Ni alloy coating formed through hot spraying with Fe-Ni alloy as the adhering phase has the advantages of small stress, low porosity, high bonding strength between the Fe-Ni alloy and TiC, excellent high temperature antiwear and anticorrosion performance and small TiC grain size.

The invention provides a mask for the flat press-forming. A Fe-Ni-Co alloy ribbon for the press-formed flat mask includes, by mass% (hereafter, expressed as %), 30-35% Ni, 2-8% Co, and 0.01-0.5% Mn, further 0.01-0.8% in total of one or two selected from 0.01-0.8% Nb and 0.01-0.8% Ti, and the balance Fe with unavoidable impurities, which include 0.0020-0.0070% C, 0.001-0.030% Si, 0.0005-0.0050% N, and 0.0015% or less S; has a sheet thickness of 0.05-0.3 mm; has a composing ratio of X-ray diffraction intensity for the face (200), of 80% or less, on the surface after the layer of 5% or thicker is removed in the sheet thickness direction from the surface, after the ribbon is annealed at 700 DEG C or higher; and has improved Young's modulus after softening annealed.

The invention relates to a method for strengthening the surface of a runner blade of a metal hydraulic turbine through combination of electro-sparking deposition and laser cladding. By performing combined treatment of electro-sparking deposition and laser cladding on the runner blade of the metal hydraulic turbine, the problems that the performances including hardness, wear resistance, corrosion resistance and impact resistance of the surface of the runner blade of the hydraulic turbine are low and the service life of a runner of the metal hydraulic turbine is short can be effectively solved. The method comprises the steps of cladding iron-nickel base alloy powder on the surface of the runner blade of the hydraulic turbine by using laser beams to form a hard alloy coating layer; then, performing electro-sparking deposition on a WC (wolfram carbine) ceramic hard alloy on the basis of the laser cladding coating layer to form a composite coating layer with combination of electro-sparking deposition and laser cladding. The method disclosed by the invention is simple, high in production efficiency and good in product quality, and the problem of treating the surface of the blade of the hydraulic turbine is effectively solved, so that the performances including hardness, wear resistance, corrosion resistance and impact resistance of the surface of the runner blade of the hydraulic turbine are improved, the service life of the runner of the metal hydraulic turbine is prolonged, and great economic and social benefits are achieved.

The invention relates to an alloy inert anode for aluminium electrolysis and a preparation method thereof, and in particular relates to an alloy inert anode for aluminium electrolysis with a high-temperature anti-oxidative and anti-corrosion coat and a preparation method thereof. The alloy inert anode disclosed by the invention structurally comprises an alloy inert anode substrate for the aluminium electrolysis and is characterized in that an inner iron-nickel based alloy coat prepared by utilizing a plasma spray coating method is on the surface of the alloy inert anode substrate for the aluminium electrolysis; and an outer oxide ceramic coat prepared by utilizing the plasma spray coating method is on the surface of the inner iron-nickel based alloy coat. According to the invention, the outer oxide ceramic coat prepared by utilizing the plasma spray coating method is compact in structure and low in porosity and is capable of effectively reducing the corrosion of the alloy inert anode; simultaneously, the inner iron-nickel based alloy coat can be reacted with oxygen entering through diffusion of the outer oxide ceramic coat to form oxide ceramic; oxygen entering the alloy substrate through diffusion is reduced; the corrosion consumption of the outer oxide coat is supplied by reaction generated oxide; and long-term steady corrosion protection is provided for the anode.

The invention provides 'a detection method, an inspection method and a manufacturing method for a temperature measuring electrothermal tube' and simultaneously provides 'a PTC electrothermal alloy characteristic apparatus', a detection device, an inspection device and a manufacturing device. The method comprises the relation between the resistance temperature coefficient and the resistivity of PTC electrothermal alloy, four stages of the development and evolution process of the temperature measuring electrothermal tube, the operating principle of the PTC electrothermal alloy characteristic apparatus, the process of manufacturing the temperature measuring electrothermal tube by utilization of the PTC electrothermal alloy characteristic apparatus, preparation of a PTC electrothermal alloy wire through auxiliary materials such as iron element and nickel element, the method for manufacturing the temperature measuring electrothermal tube by utilization of the PTC electrothermal alloy wire, the detection, the inspection and the method for forming the device. The invention analyzes various important temperature spots of the temperature measuring electrothermal tube, solves the problem of errors caused by various factors of the manufacturing technique of the temperature measuring electrothermal tube, meets the precision requirement, and simplifys temperature sensing, strain and heating of intelligent materials of the PTC alloy wire into an element to replace the lagged temperature control method of sensing, temperature signal processing and execution, simplifies the structure, and reduces the cost.

The invention relates to a method for rapidly reducing nickel waste slag to produce iron-nickel-copper alloy powder in a kiln under the reducing atmosphere. The method is characterized by comprising the following steps of: proportionally mixing the nickel waste slag, reducing agents and additives, crushing or levigating the mixture to 200 meshes to obtain 20-40% of residues on sieve; doping agglomerants and water occupying 5-20% of all materials on a dry mass basis, and uniformly mixing; preparing small balls with the diameter of 15-33 mm or small cylinders with the diameter and the height of 15-30 mm by using a ball press machine or a section making machine; drying; flatly paving the materials at the bottom of the kiln, wherein the thickness of the material layer is 20-45 mm, the reducing temperature of the material layer is 1,250-1,450 DEG C, and the reducing time is 10-40 minutes; and performing cooling, crushing, wet grinding and wet magnetic separation on the reduced balls or sections to obtain iron-nickel-copper alloy micropowder with the iron recovery rate of 85-99 %, wherein in the obtained product, the iron content is 88-98 %, the nickel content is 0.13-1.98 %, the copper content is 0.14-1.29 % and the particle size is 3-100 microns, and the product can serve as a raw material for smelting weather-resistant steel. The tailings after wet grinding and wet magnetic separation can serve as raw materials for extracting aedelforsite or producing hollow sintered bricks.

The invention provides a vacuum annealing method for iron-nickel soft magnetic alloy. The method comprises two annealing processes; the primary annealing process is a conventional vacuum annealing process, wherein the cooling speed of an ordering area is controlled when in alloy cooling, and the ordering area is a temperature range of transforming alloy from order into disorder; and the secondary annealing process is a two-section continuous vacuum annealing process which is used for stabilizing the magnetic performance of the alloy. The method can remarkably improve the magnetic performance of the iron-nickel soft magnetic alloy and can reduce the deformation of the alloy, thereby being suitable for batch production.

A method of chromium coating a substrate is described, which method comprises: a) depositing, preferably electrodepositing, a metallic layer onto the substrate comprising chromium from a plating bath that includes trivalent chromium and no, or substantially no, hexavalent chromium; b) physical vapor depositing a layer comprising chromium cn the layer deposited from step a). In one embodiment, in step a), the layer is chromium and is electrodeposited from a plating bath that includes trivalent chromium and no, or substantially no, hexavalent chromium. The metallic layer deposited in step a) is preferably a metal or an alloy of two or more metals and may be selected from the group consisting of chromium, copper, nickel, cobalt, zinc, lead iron, palladium and tin and alloys thereof, e.g. copper tin, copper zinc, tin lead, tin nickel, tin cobalt, tin zinc, iron nickel, cobalt nickel, zinc nickel, zinc iron, zinc iron nickel, zinc iron cobalt or palladium nickel. Copper and nickel are especially preferred. The coating formed by the method has a blue sheen that is usually associated with chromium electrodeposited from hexavalent chromium baths without having to use a hexavalent chromium bath, which is highly toxic.