80 results about "Fernico" patented technology

The invention relates to a preparation method of a nickel-chromium-iron alloy consumable electrode, the consumable electrode and an alloy ingot. The method comprises the steps that an electrolytic nickel plate is subjected to vacuum melting under the condition that the vacuum degree is smaller than or equal to 0.67 Pa, after the electrolytic nickel plate is melted down, the vacuum degree is kept to be smaller than 2 Pa and lasts for 5 min to 10 min, and a nickel melt with the lead removal rate larger than or equal to 60% is obtained; pouring the nickel melt into a pure nickel electrode under a vacuum condition; combining the pure nickel electrode with industrial pure iron to form an iron-nickel composite electrode; with the iron-nickel composite electrode as a consumable electrode, ferrochrome is added into a lined electroslag furnace for smelting, and a high-temperature metal melt is obtained; the high-temperature metal melt is tapped to a steel ladle, and argon is blown to the bottom of the high-temperature metal melt in the steel ladle for 3-5 min; and the high-temperature metal melt obtained after bottom argon blowing is poured into the consumable electrode. According to the method, five types of fusible elements including Pb, Bi, Sn, As and Sb are systematically and gradually reduced to be extremely trace by coupling three steps of vacuum volatilization, deep electroslag separation and secondary ladle refining.

The invention discloses iron-nickel-based low-expansion alloy powder and a preparation method thereof.The alloy powder comprises, by mass, less than or equal to 0.05% of C, less than or equal to 0.5% of Co, 35%-37% of Ni, 0.2%-0.6% of Mn, less than or equal to 0.3% of Si, less than or equal to 0.01% of S, less than or equal to 0.01% of P, less than or equal to 0.02% of O, 0.025% of Ce, 0.025% of Le and 62% of Fe, and the defects of traditional invar steel powder in component control, density and thermal expansion performance are overcome. Through combination of component design, precise smelting and an advanced atomization process, the comprehensive performance of the material is remarkably improved, the application requirement of modern high-end manufacturing on the material in an extreme environment is met, and the material has wide market prospects and popularization value.

The present invention addresses the problem of suppressing deformation such as edge waves, center waves, and warping from occurring in an ultra-thin (50 μm or less in thickness) iron–nickel alloy foil, and the purpose of the present invention is to obtain an iron–nickel alloy foil in which such deformation is suppressed. This iron–nickel alloy foil has a positron annihilation lifetime (PAL) of at least 0.150 ns and can reduce the amount of deformation (the total evaluated amount of deformation such as edge waves, center waves, and warping) relative to conventional products. In order to form a primarily vacant microstructure to achieve a PAL of at least 0.150 ns, an iron–nickel alloy foil can be obtained by manufacturing an alloy block (slab) by HIP treatment and rolling and heat treating the alloy block in accordance with conventional methods.

The invention relates to an iron-nickel-based medium-temperature electrothermal alloy and a preparation method thereof, and belongs to the technical field of alloy preparation. The electrothermal alloy comprises the following chemical components in percentage by mass: 0.01%-0.03% of C, 0.70%-1.50% of Al, less than or equal to 0.80% of Cr, less than or equal to 0.003% of S, less than or equal to 0.020% of P, 51%-53% of Ni, 0.04%-0.20% of rare earth, 0.80%-1.50% of Ti and a matrix element Fe, wherein the rare earth comprises at least one of Y, La and Ce. Alloy elements such as Al, rare earth and Ti are introduced, so that the oxidation resistance of the alloy is improved, and the service life of the alloy in a medium-temperature environment is greatly prolonged. And meanwhile, on the basis of ensuring excellent mechanical properties, the resistivity of the alloy material is effectively improved, and the resistance temperature coefficient of the alloy material is optimized, so that the alloy material can better meet the performance requirement of the positive temperature coefficient effect, and finally, the applicability, design flexibility and integration degree of the electrothermal alloy in a limited design space are enhanced.

The invention discloses a nickel-based alloy material for laser cladding and GTAW connection. The nickel-based alloy material comprises a laser cladding material and a GTAW welding material, wherein the laser cladding material comprises the following components in percentage by mass: 20.0-30.0% of Ni powder, 20.0-30.0% of Co powder, 10.0-20.0% of Cr powder and the balance of Fe powder, and the sum of the mass percentages of the components is 100%; the GTAW welding material comprises a flux core and a welding skin, the flux core comprises, by mass, 30.0%-40.0% of Fe powder, 10.0%-20.0% of Co powder, 10.0%-20.0% of Ta powder, 3%-6% of Al powder, 3%-6% of Ti powder and the balance Ni powder, and the sum of the mass percentages of the components is 100%. The invention further discloses a nickel-based alloy welding connection method, and the softening problem of the aging-state iron-nickel-based high-temperature alloy joint under the GTAW technology is solved.

The utility model relates to the field of power electronic devices, in particular to a damping ring for an electric reactor. Comprising an upper shell, a lower shell which is detachably connected with the upper shell, a ring shaft which is detachably arranged between the upper shell and the lower shell, and a winding type annular iron core which is sleeved on the ring shaft and is formed by winding an iron-nickel base alloy belt. According to the utility model, the structural design is further optimized while the good electromagnetic performance of the damping ring is maintained, and the installation convenience, the heat dissipation performance and the universality are improved.

Nickel-based alloy welding wire for welding dissimilar iron / nickel rotors, its preparation method, and its application. This invention belongs to the technical field of nickel-based alloy materials. The purpose of this invention is to solve the technical problem that existing weldable nickel-based alloy welding materials cannot meet the practical engineering needs of welding rotors made of dissimilar nickel-based and iron-based materials. This invention achieves this by comprehensively controlling the composition of the welding wire, especially by precisely controlling the content of Al, Ti, Nb, and Ta, to ensure that the deposited metal maintains high comprehensive mechanical properties at room temperature and high temperature under conditions of no solution aging, and also ensures good welding performance. It is applied to the welding of dissimilar nickel-based and iron-based alloy rotors at 700℃.

The invention provides a heat treatment method for a difficult-to-deform solution strengthening iron-nickel base alloy wide and thick plate. The heat treatment method comprises the treatment steps of low-temperature super-long-time annealing and high-temperature short-time solution treatment. Wherein under the field working conditions that the productivity of a low-temperature heating furnace with the highest furnace temperature lower than 1100 DEG C is rich and the productivity of a high-temperature furnace with the highest furnace temperature higher than 1220 DEG C is tight, the following treatment steps are adopted: annealing at a low temperature for a long time, water cooling, re-heating for high-temperature short-time solution treatment, heat preservation and discharging and water cooling; or under the field working condition that the productivity of the high-temperature heating furnace with the highest furnace temperature capable of reaching 1220 DEG C is rich, the following treatment steps are adopted: annealing at a low temperature for a long time, heating to a high-temperature short-time solid solution temperature in the furnace, preserving heat, and discharging from the furnace and cooling with water.

A copper alloy wire formed from a copper alloy containing iron, phosphorus, tin, and auxiliary elements, the remainder comprising copper and unavoidable impurities, the auxiliary elements being two or more elements selected from the group consisting of zinc, nickel, and chromium or being only zinc, the iron content being 0.1-1.0 mass%, and the balance being copper and unavoidable impurities. The content ratio of phosphorus is from 0.1 mass% to 0.6 mass% (inclusive), the content ratio of tin is from 0.1 mass% to 0.4 mass% (inclusive), the content ratio of zinc when zinc is contained is from 0.005 mass% to 1.40 mass% (inclusive), the content ratio of nickel when nickel is contained is from 0.005 mass% to 0.70 mass% (inclusive), the content ratio of chromium when chromium is contained is from 0.005 mass% to 0.20 mass% (inclusive), and the balance of zinc and unavoidable impurities. The mass ratio of the total content of iron, nickel, and chromium to the content of phosphorus is 3.0-7.0.

The invention discloses an on-site metallographic electrolytic erosion device for a large iron-nickel-based alloy and a use method. The on-site metallographic electrolytic erosion device comprises a direct-current power supply, a cathode electrolysis bottle and an anode electrode, in a detection state, one end of the cathode electrolysis bottle is connected to a to-be-detected workpiece, the other end is connected to the cathode of the direct-current power supply, one end of the anode electrode is connected to the to-be-detected workpiece, and the other end is connected to the anode of the direct-current power supply; when the to-be-detected workpiece is detected, the anode electrode is connected to the positive electrode of the direct-current power supply, and the anode electrode is fixed on the to-be-detected workpiece; a cathode electrolysis bottle is connected to the negative electrode of the direct-current power source, and electrolyte is injected into the cathode electrolysis bottle; turning on a direct-current power supply, and adjusting current and voltage according to the requirement of the to-be-detected workpiece. According to the invention, electrolytic erosion can be carried out on the surface of a relatively complex large workpiece.

The invention provides an integrated elastomer assembly of an inductance type six-axis force torque sensor and a preparation method of the integrated elastomer assembly. The integrated elastic body assembly comprises a T-shaped beam elastic body; a groove is formed in the tail end of a web of the T-shaped beam elastic body, and an integrally-formed metal induction unit is arranged in the groove. The metal sensing unit comprises a metal bottom layer, a metal middle layer and a metal surface layer which are sequentially stacked in the direction away from the flange of the T-shaped beam elastic body. The preparation raw materials of the metal surface layer comprise platinum powder, iron-nickel alloy powder and nanometer iron oxide. According to the invention, the metal sensing unit and the T-shaped beam elastic body are integrally formed, so that the assembly clearance can be eliminated, and the deformation transmission efficiency and the structural reliability are improved; and meanwhile, the material and distribution of the metal powder are optimized, the environmental adaptability is enhanced, and high-precision, high-stability and compact six-axis torque detection is realized.

The invention discloses a hot rolling process of a high-strength anchor rod steel bar. The hot rolling process comprises the following steps: S1, molten iron pretreatment; s2, molten iron smelting: molten iron, scrap steel and copper are added into a converter, a top-bottom combined blowing converter is adopted for blowing, and the tapping temperature is controlled to be 1620-1670 DEG C, S3, molten iron refining: 4-5 kg / t ferromolybdenum, 2-3 kg / t nickel plate and 1.5-2.5 kg / t ferrovanadium are added into the molten iron in the middle stage of refining; s4, RH vacuum degassing and soft argon blowing, wherein after RH vacuum degassing treatment, a silicon-calcium line is added for purifying molten steel, and then soft argon blowing treatment is conducted; s5, continuous casting: carrying out protective casting on molten steel in the whole process; the temperature of a preheating section is controlled to be 800-900 DEG C, the temperature of a heating section is controlled to be 980-1030 DEG C, and the temperature of a soaking section is controlled to be 1050-1080 DEG C; s7, steel billet rolling; and S8, cooling the anchor rod reinforcing steel bars. The high-strength and high-toughness composite material disclosed by the invention has relatively high strength and toughness and can be completely used under severe natural conditions in the engineering field, and the production method provided by the invention is simple, easy to implement, low in cost and suitable for industrial production.

This invention discloses a high-strength, high-corrosion-resistant alloy and its preparation method, belonging to the field of corrosion-resistant alloy technology. It solves the problem that existing iron-nickel-based corrosion-resistant alloys cannot meet the high strength and high corrosion resistance requirements of oil well pipe materials. The high-strength, high-corrosion-resistant alloy comprises, by mass percentage: C≤0.03%, 27.0%<Cr≤29.0%, 29.5%<Ni≤32.5%, 0.08%<N≤0.20%, 0.10%<W≤1.00%, Mn≤1.0%, 3.0%<Mo≤4.0%, 1.0%<Cu≤1.4%, Si≤1.0%, P≤0.03%, S≤0.03%; the balance being Fe and unavoidable trace impurities. The high-strength, high-corrosion-resistant alloy of this invention exhibits excellent tensile strength, yield strength, hardness, and corrosion resistance.

A cobalt-free, tungsten carbide-based cemented carbide material includes 70-97 wt % of hard substance particles formed at least predominantly by tungsten carbide, and 3-30 wt % of a metallic binder which is an iron-nickel-based alloy. The iron-nickel-based alloy includes at least iron, nickel and chromium, with a ratio of Fe to (Ni+Fe) of 0.70≤Fe / (Fe+Ni)≤0.95; a Cr content of 0.5 wt %≤Cr / (Fe+Ni+Cr) and (i) for the range 0.7≤Fe / (Fe+Ni)≤0.83: Cr / (Fe+Ni+Cr)≤(−0.625*(Fe / (Fe+Ni))+3.2688) wt %; (ii) for the range 0.83≤Fe / (Fe+Ni)≤0.85: Cr / (Fe+Ni+Cr)≤(−27.5*(Fe / (Fe+Ni))+25.575) wt %; and (iii) for the range 0.85≤Fe / (Fe+Ni)≤0.95: Cr / (Fe+Ni+Cr)≤2.2 wt %; an optional Mo content, an optional V content, and unavoidable impurities up to in total not more than 1 wt % of the cemented carbide material.

The invention discloses a Fe-Cr-Ni-Nb-Y iron-nickel-based alloy and a preparation method thereof, and belongs to the field of alloys, and the preparation method comprises the following steps: step 1, obtaining a raw material formula of chromium, chromium, niobium, yttrium, silicon, manganese, phosphorus, sulfur and iron; secondly, raw materials of the alloy are added into a smelting furnace to be smelted, oxygen and nitrogen in molten steel are removed through vacuum degassing, and the oxygen content is controlled within the range smaller than 5 ppm; 3, Fe2O3 is added, inert gas containing O2 is backfilled, the oxygen activity of the molten steel reaches 10-30 ppm instantly, and the time should be controlled to be 5-30 seconds; step 4, rapid cooling; 5, heat treatment is conducted, specifically, the temperature is controlled to be 1000-1100 DEG C, aging treatment is conducted at the temperature range of 650-800 DEG C for 10-20 hours, and then air cooling is conducted to the room temperature; and step 6, carrying out low-temperature destressing treatment.

This invention provides a method for processing fine iron-nickel alloy wire, comprising: pre-treating the wire to be processed using a first mold and a lubricant; drawing the pre-treated wire using a second mold set and a first lubricant; drawing the wire obtained after the first drawing process using a third mold set and a second lubricant; and a cleaning step: cleaning the wire obtained after the second drawing process. Pre-treatment effectively removes surface contaminants from the raw material; the first lubricant improves drawing efficiency and surface quality; the second lubricant removes residual first lubricant from the wire, giving the processed wire better washability; and cleaning makes the wire cleaner. Compared with existing technologies, no intermediate heat treatment is required, and fine iron-nickel alloy wire with good surface quality can be obtained through a simple process.

The invention discloses a hot rolling method for a thin-gauge iron-nickel-based alloy, and belongs to the technical field of hot rolled plates and strips. The hot rolling method comprises the steps of comprehensive control plan arrangement, blank preparation, heating, rough rolling, hot coiling box, finish rolling, layer cooling and coiling, meanwhile, the pinch roll lifting function is developed, and the phenomenon that the strip steel is subjected to brittle failure after being stressed due to the fact that the pressure of the pinch roll is increased before the wave shape of the head of the strip steel is eliminated is avoided. According to the method, the problems of transverse cracking in charging, cracks generated in rough rolling, hot coil box deviation, F6-F7 deviation rolling breakage, breakage in the steel coiling process and the like are solved, and the stability of the iron-nickel-based alloy in the rolling process is improved.

The invention belongs to the technical field of high-temperature alloy heat treatment, and particularly relates to a heat treatment method for improving the steam oxidation resistance of an iron-nickel-based high-temperature alloy. According to the invention, a triple (vacuum induction melting, vacuum self-consumption and vacuum self-consumption) method is adopted for smelting. The method comprises the following steps: firstly, carrying out homogenization treatment on the iron-nickel-based superalloy, then carrying out two-step solution treatment, continuously carrying out two-step aging treatment, and separating out a strengthening phase gamma'phase-Ni3 (Al, Ti) to obtain the nickel-based superalloy. The steam oxidation resistance of the nickel-iron-based high-temperature alloy is improved on the premise that the mechanical property of the nickel-iron-based high-temperature alloy is guaranteed, so that the alloy is particularly suitable for an ultra-high-temperature steam environment at the temperature of 650 DEG C or above, and the material requirements of key heat channel components of a new generation of supercritical coal-fired units are met.

The application discloses a preparation method of a ceramic iron-nickel alloy double-biomimetic multilayer film. The preparation steps comprise the following steps: carrying out carburizing treatment on carbon steel; etching a honeycomb framework on the surface after the carburizing treatment; alternately depositing a metal layer with carburide forming capability, a nickel layer, a metal layer with carburide forming capability and an iron layer along the side wall and the bottom surface of the honeycomb framework as a period of a three-dimensional multilayer film, until the three-dimensional multilayer film is flush with the surface of the substrate; and carrying out heat treatment to make carbon, iron and nickel elements diffuse. Finally, the surface structure is composed of the honeycomb structure framework and the annual ring structure ceramic / iron-nickel alloy multilayer film. The multilayer film has a periodic structure and a gradient ceramic grain size, the interlayer interface is irregular and zigzag and has metallurgical bonding. The ceramic / iron-nickel alloy double-biomimetic structure gradient multilayer film prepared by the application significantly improves the strength and toughness of the film layer and the interfacial bonding force, and further improves the comprehensive performance.

The utility model discloses an iron-nickel alloy high-temperature chlorination separation system which comprises a feeding mechanism, a reaction chamber, a separation mechanism, a trapping mechanism and a tail gas backflow mechanism, a filler cavity, an iron-nickel alloy containing cavity and a feeding and exhausting cavity are formed in the reaction chamber, particles are filled in the filler cavity, a chlorine inlet and a hot gas inlet are formed in the bottom of the filler cavity, and the tail gas backflow mechanism is arranged in the reaction chamber. The feeding mechanism is communicated with the feeding and exhausting cavity, a gas phase exhausting opening is formed in the side wall of the feeding and exhausting cavity, the separating mechanism is communicated with the gas phase exhausting opening and used for separating nickel chloride from an iron-nickel-containing gas phase, and the trapping mechanism is communicated with the separating mechanism and used for receiving ferric chloride gas of the separating mechanism, cooling the ferric chloride gas into a solid state and trapping the ferric chloride gas. The tail gas backflow mechanism is communicated with the trapping mechanism and the feeding mechanism. The iron-nickel alloy high-temperature chlorination separation system has the advantages that the production process can be simplified, the overall production efficiency is improved, and the overall production effect is improved.

This invention discloses a high-temperature titanium alloy phase change superplastic diffusion bonding method, belonging to the field of material welding technology. The bonding method is as follows: the surface of the high-temperature titanium alloy sample to be welded is pretreated and chemically etched sequentially, followed by magnetron co-sputtering to sputter a layer of iron-nickel composite film onto the surface, obtaining an intermediate sample. The intermediate sample is then annealed to obtain a sample to be welded with the iron-nickel composite film layer; the iron-nickel composite film accounts for 0.55%~0.80% of the mass of the high-temperature titanium alloy sample; the mass ratio of iron to nickel in the iron-nickel composite film is (70:30)~(90:10); the sample to be welded with the iron-nickel composite film layer is then welded through multiple cycles of heating and cooling within a preset temperature range using a phase change superplastic diffusion process. This phase change superplastic diffusion bonding method solves the technical problems of low efficiency and unstable mechanical properties of welds in traditional isothermal diffusion welding.

This invention discloses a short-process rapid solidification / powder metallurgy technology and its applications. The short-process rapid solidification / powder metallurgy technology of this invention includes the following steps: Step 1: Using metal wire or powder as raw material, a bulk blank with a thickness of 1-10 mm is deposited on a substrate using thermal spraying technology; the metal is selected from magnesium, titanium, copper, iron, nickel, zinc, aluminum, or their alloys; Step 2: The bulk blank is thermomechanically processed to obtain a sheet product; the thermal spraying technology includes flame spraying, supersonic spraying, arc spraying, plasma spraying, or cold spraying; the thermomechanical processing includes hot rolling, hot extrusion, or hot forging. This invention significantly shortens the preparation process, consumes less energy, has low overall production costs, and has wide applicability, and can be applied to the preparation of metal matrix composites, ultrafine-grained metal materials, heterostructure metal materials, layered structure metal composites, etc.

The application discloses a copper expansion alloy glass sintering process, which comprises the following steps: putting selected glass powder into a push blank machine, pressing a glass blank according to a required height and weight; placing the glass blank on a carrier in a net belt and putting it into a net belt waxing glass melting furnace to remove glue; putting it into the net belt waxing glass melting furnace to melt the glass, checking the appearance, size and weight of the glass blank after melting, assembling the glass blank, an inner conductor, a shell and a graphite mold, and putting them into a vacuum furnace to sinter at a sintering temperature of 900-1100 DEG C; and performing surface treatment after sintering. The copper expansion alloy is used as the material of the inner conductor of the glass sintering product, so that the electric performance of the product is more superior, the rated current is greatly increased, and the temperature rise is greatly reduced; and the problem of magnetic interference caused by the iron-nickel expansion alloy glass sintering product is solved.

The invention discloses a cast and weldable near eutectic Al-Fe-Ni aluminum alloy and a preparation method of the cast and weldable near eutectic Al-Fe-Ni aluminum alloy. The invention discloses a castable and weldable near-eutectic Al-Fe-Ni aluminum alloy which comprises the following components in percentage by mass: 1.0%-2.0% of iron, 1.0%-1.5% of nickel, 0.1%-7.8% of calcium, 0.1%-1.0% of magnesium, 0.1%-1.0% of silicon, 0.1%-3.0% of zinc, 0.1%-1.0% of cerium, 0.1%-1.0% of lanthanum and inevitable impurities 1t. 0.3%, and the balance being aluminum. The castable and weldable aluminum alloy provided by the invention has higher melting point, mechanical property and flowability, and can be suitable for the industries of vacuum brazing, casting molding and the like.

The present application relates to a low-cost iron-nickel-based heat-resistant alloy and a high-speed rolling method thereof, and belongs to the technical field of special alloy manufacturing. The present application solves the technical problems of cracking, short tool life, high energy consumption and low efficiency in subsequent solid solution treatment caused by uneven material temperature rise and cooling during high-speed rolling of the existing heat-resistant alloy. In the method of the present application, the heated heat-resistant alloy rolling stock is sequentially passed through the rough rolling, intermediate rolling and finishing rolling units. At least two cooling devices are arranged at the key positions in the later stage of the finishing rolling unit. The polyacrylamide aqueous solution containing specific particle size and proportion of aluminum oxide powder is used for intermittent jet cooling of the wire. The finished wire is directly put into the solid solution furnace for online solid solution treatment and water cooling. The present application realizes the integrated production of heat-resistant alloy wire from rolling to heat treatment with high efficiency, high quality and low energy consumption. The prepared wire has uniform structure and excellent performance, and is especially suitable for manufacturing engine valves.

The invention relates to a low-nickel high-strength iron-nickel-based heat-resistant alloy and a preparation method thereof, and belongs to the technical field of high-temperature metal materials, and the alloy comprises the following chemical components in percentage by weight: 0.01-0.10% of C, less than or equal to 0.20% of Si, less than or equal to 0.50% of Mn, less than or equal to 0.020% of P, less than or equal to 0.020% of S, 18.00-24.00% of Cr, 22.00-28.00% of Ni, 1.50-2.80% of Ti, 0.80-2.00% of Al, 0.70-1.80% of Nb, 0.20-0.60% of V, less than or equal to 0.060% of Zr, less than or equal to 0.050% of Ce, less than or equal to 0.20% of Cu and the balance of Fe According to the alloy, through optimized component design, the nickel content is reduced, and meanwhile it is ensured that the alloy still has excellent high-temperature performance at 750 DEG C (the tensile strength is larger than or equal to 730 MPa, the yield strength is larger than or equal to 610 MPa, and the percentage elongation after fracture A is larger than or equal to 21.0%). Meanwhile, the invention provides a special grain display method suitable for the alloy, the grain boundary display problem caused by the high chromium content and the solid solution state of the alloy can be effectively solved, and clear and stable display of the grain size is achieved. The alloy is suitable for manufacturing high-temperature parts such as engine air valves.

The invention belongs to the technical field of metal material preparation, and particularly relates to a magnesium alloy preparation method based on microalloying regulation and control. The method comprises the following steps: designing magnesium alloy components including gadolinium, calcium, zinc, impurity elements including iron, nickel and copper, and the balance of magnesium and inevitable impurities; smelting treatment: smelting magnesium alloy components to obtain an alloy melt; quenching solidification and pretreatment: carrying out quenching solidification treatment on the alloy melt to obtain a cast ingot, and carrying out homogenization pretreatment on the cast ingot to obtain an initial matrix; low-temperature large-deformation heat-force machining is conducted, specifically, the initial base body is cut into an extrusion blank to be subjected to hot extrusion, and an extrusion bar is obtained; and isothermal nanoclustering treatment is conducted, specifically, the extruded bar is placed in an aging furnace to be subjected to isothermal treatment. Through the synergistic effect of the processes, multi-mechanism coupling of grain boundary segregation strengthening, ultra-fine grain strengthening and nanocluster dispersion strengthening is achieved, and the problem that the plasticity, toughness, corrosion resistance and economical efficiency of the magnesium alloy are deteriorated due to traditional macro alloying is effectively solved.

The application discloses a production method of a high-temperature and high-pressure resistant large-diameter iron-nickel-based alloy pipe, which comprises the following steps: a vacuum melting step, a hot deformation processing step and a heat treatment step; wherein the solid solution treatment in the heat treatment step comprises the following steps: a heating step, a heat preservation step and a cooling step; the cooling step adopts a double cooling mode of early water cooling and later polymer quenching liquid cooling; when the cooling time of the large-diameter alloy pipe blank is less than the conversion time, the large-diameter alloy pipe blank is cooled in the water cooling mode; and when the cooling time of the large-diameter alloy pipe blank is equal to or greater than the conversion time, the large-diameter alloy pipe blank is cooled in the polymer quenching liquid. The application has a faster cooling speed, thereby effectively inhibiting the precipitation of the gamma prime phase in the cooling process, and simultaneously significantly reducing the stress in the low-temperature stage, which is beneficial to the control of deformation and cracking.

This utility model discloses an improved bimetallic strip for a fast-response circuit breaker, including a positive electrode connecting plate. One end of the positive electrode connecting plate is fixedly connected to a copper alloy plate and an iron-nickel alloy plate, and an expansion component for accelerating bending is provided between the copper alloy plate and the iron-nickel alloy plate. When the circuit is overloaded, the current increases sharply, and the heat generated is conducted to the copper alloy plate and the iron-nickel alloy plate through the positive electrode connecting plate. Due to the excellent thermal conductivity of the copper alloy material, the expansion plate quickly absorbs the heat and begins to expand significantly due to its high coefficient of thermal expansion. At the same time, the transverse limiting plate and the extrusion plate made of iron-nickel alloy material also expand to a certain extent due to heat, causing the size of the extrusion groove to shrink synchronously. The reduction in the size of the extrusion groove provides a more compact space for the expansion plate to expand, further enhancing the expansion effect of the expansion plate in a limited space. As the expansion plate continues to expand and fill the extrusion groove.

The present application belongs to the field of corrosion-resistant iron-nickel-based alloys. More particularly, it relates to a method for eliminating precipitated phases of N08028 alloy after forging without solid solution. The method comprises the steps of electrode preparation, crystallizer preparation, polishing the copper bottom plate of the bottom water tank using a polishing device, placing four arc initiators at the center of the carbon steel plate, filling argon into the crystallizer, preparing slag, controlling the steady-state melting rate during smelting, using fast forging + radial forging for forging, and directly water cooling after radial forging without solid solution, so that the total content of precipitated phase intermetallic compound phase, nitride phase and carbide phase is not more than 1.0%, and the content of sigma phase is not more than 0.2%.