146 results about "Fernico" patented technology

The invention discloses a heat treatment method of an iron-nickel-based high-temperature alloy, which solves the contradiction between stress relief annealing and performance maintenance through four-step temperature coordinated regulation and control: in the first step, MC type carbide is dissolved through solid solution, segregation is eliminated, and excessive growth of crystal grains is avoided; in the second step, roughening of M23C6 type carbides is inhibited through solid solution, and formation of fine and uniform carbides on grain boundaries is promoted so as to strengthen the grain boundaries; in the third step, the residual stress is reduced through stress relief annealing, and meanwhile grain boundary carbide growth and abnormal grain growth are avoided; and in the fourth step, uniform and stable precipitation of a gamma'phase is promoted through aging, the nanometer size and the high volume fraction are maintained, and coarsening is avoided. Through precise temperature connection, the residual stress is effectively reduced, grain growth, structure nonuniformity or performance degradation caused by traditional annealing are avoided, and finally the application requirement of the superhigh-temperature steam environment at the temperature of 650 DEG C or above is met on the premise that the mechanical property and the corrosion resistance are guaranteed.

The present application provides a susceptor for inductively heating an aerosol generating substrate, a preparation method of the susceptor, and an aerosol generating article comprising the susceptor; the susceptor comprises a single alloy prepared by smelting iron, nickel and zircon as main element raw materials, has a Curie temperature of 300-600 DEG C, and the initial magnetic permeability of the alloy presents a peak characteristic with the increase of temperature. The single layer structure susceptor of the single alloy material of the present application realizes the functions of heating and temperature control at the same time, and overcomes the defects of the prior art, such as complex process, high preparation cost, and limited compatibility of electromagnetic induction heating appliances. Meanwhile, the susceptor has a relatively wide magnetic performance variation window and an aerosol generating system performance variation window, and can be flexibly adapted to more aerosol generating substrates.

The invention relates to the technical field of motors, in particular to a magnetic conductance motor adopting a magnetic conductance reinforcing material, which comprises a stator assembly and a rotor assembly which are concentrically arranged, and the rotor assembly is arranged in the stator assembly. The stator assembly is formed by radially positioning and splicing 12-24 silicon steel sheet inserts through a dovetail joint structure, traditional lamination gap loss is eliminated, T-shaped teeth (iron-nickel-based magnetically soft alloy 1J34 / 1J36) which are deeply embedded (1 / 3-1 / 2 of the tooth height) are combined, the magnetic circuit conduction efficiency is remarkably optimized through the high magnetic conductivity (larger than or equal to 60,000 H / m) and the saturation flux density (larger than or equal to 1.5 T), and the magnetic saturation risk is avoided; a non-magnetic stainless steel base body (304 / 316) is adopted on the rotor side to block a stray magnetic circuit, and a low-loss magnetic field closed loop is formed by matching the magnetism gathering design of a V-shaped neodymium iron boron insert (Br is larger than or equal to 1.2 T, Hc is larger than or equal to 900 kA / m, and the included angle is 60-90 degrees) and directional magnetism conduction of a 20-30-degree fan-shaped angle magnetic barrier insert, so that the purposes of high efficiency, low consumption, high reliability and low cost are achieved.

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.

Alloys comprising a magnetic element, such as iron, nickel, and / or cobalt, and a resistance-enhancing material, and related compositions and methods, are generally described. In some embodiments, the alloy further comprises a grain size-reducing material. The resistance-enhancing material and / or the grain size-reducing material may increase the resistance (e.g., resistivity) of the alloy while still maintaining the magnetic properties of the alloy, which can improve the inductive properties of the alloy, or a composition comprising the alloy.

The invention provides a wafer thinning device and a wafer thinning method. The wafer thinning equipment comprises a grinding wheel for wafer thinning, the grinding wheel is provided with a grinding wheel base body made of a metal composite sheet, the metal composite sheet is formed by alternately overlapping a first metal material layer and a second metal material layer, the sum of the number of the first metal material layer and the number of the second metal material layer is an odd number, and the adjacent first metal material layer and the adjacent second metal material layer are connected in a metallurgical bonding mode. The top surface and the bottom surface which are oppositely arranged in the metal composite sheet serve as the top surface and the bottom surface of the grinding wheel base body; the first metal material layer is made of an alloy material or a metal material of which the CTE does not exceed 10 ppm / DEG C and the heat conductivity coefficient is not lower than 130 W / m.K; and the second metal material layer is made of an iron-nickel-based alloy material with CTE not exceeding 6.0 ppm / DEG C. According to the wafer thinning equipment, the thermal expansion matching performance of the grinding wheel base body and the silicon wafer and the stability of the thinned TSV structure in the wafer thinning process can be improved, and high precision and low damage of 3D IC thinning are achieved.

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.

The present application relates to the field of low-temperature plasma catalysis, and particularly relates to a method for catalytic conversion of methane-nitrogen-water to methanol and ammonia under plasma conditions.The present application discloses a preparation method of a high-entropy alloy catalyst, comprising the following steps: mixing powdery iron, nickel, vanadium, niobium, silver, copper and titanium, and then smelting the mixture into an alloy ingot under an inert gas atmosphere, and then performing annealing treatment and grinding, and then using a nitric acid solution as an etching solution to obtain a high-entropy alloy powder.The present application combines an efficient high-entropy alloy catalyst under plasma conditions to efficiently catalyze the collaborative conversion of methane-nitrogen-water, and directly prepare methanol and ammonia, thereby realizing comprehensive utilization of methane and nitrogen under mild conditions.

The invention relates to the technical field of nickel-containing waste recovery, and particularly discloses a method for producing electrolytic nickel from a nickel-containing solid waste raw material. Nickel-containing waste, tin-containing waste and a synergist are blended and calcined, tin in the tin-containing waste has a low melting point, can form a Ni3Sn2 metal compound with Ni and can also form an alloy phase with Co and Cr, and the nickel-containing waste, the tin-containing waste and the synergist are mixed and calcined. The nickel-based high-temperature alloy waste can permeate among nickel-based alloy grains, the original compact structure is destroyed, the dissolving and leaching difficulty of the nickel-based high-temperature alloy waste is effectively reduced, and the dissolving and leaching efficiency of nickel in the waste is improved; meanwhile, through the effect of the synergist, rapid heating and melting can be achieved, meanwhile, ferrous iron in the nickel-containing waste can be oxidized into ferric oxide, the compact continuity of an original iron-nickel metal phase is broken, the follow-up dissolving and leaching difficulty is lowered, Fe < 2 + > is oxidized into Fe < 3 + >, Fe < 3 + > can form precipitates at the low pH value, and separation is easier.

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.

The utility model relates to the technical field of metal processing, and discloses an aluminum alloy melt efficient mixing device which comprises a mixing tank and smelting furnaces arranged on the two sides of the mixing tank, one smelting furnace is specially used for smelting pure aluminum blocks, and the other smelting furnace is commonly used for smelting iron, nickel or other alloy element raw materials. A conveying pipeline is arranged between each smelting furnace and the mixing tank in a communicating mode, a stirring mechanism is arranged in the mixing tank, and the stirring mechanism comprises a stirring shaft rotationally arranged in the mixing tank, a plurality of stirring blades distributed in the axial direction of the stirring shaft, a rotating disc arranged on the stirring shaft in a sleeving mode and a stirring motor driving the stirring shaft to rotate; the stirring shaft and the mixing tank are coaxially arranged, the rotating disc is located at the position, close to the bottom, in the mixing tank, the top of the rotating disc is provided with multiple sets of material guiding slopes in the axial direction of the rotating disc, the rotating disc is rotationally matched with the inner side wall of the mixing tank, and a heating assembly is arranged on the mixing tank. The method has the effect of effectively promoting refining of the primary phase of the aluminum alloy raw material.

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.

A method for producing a casting from a copper alloy comprising the following steps: a. Melting a copper alloy with the following composition [in wt.%]: Cu 70.0 to 97.0%, Si 2.0 to 4.5%, B 0.002 to 0.03%, Fe 0.01 to 1.0%, optionally up to 2.0% Sn, optionally up to 0.4% Ni, optionally up to 0.2% P, optionally up to 0.25% Pb, optionally up to 0.15% As or Sb, Rest Zn and unavoidable impurities, where the ratio of boron content to the sum of iron and nickel content is at least 0.025 and at most 0.12 b. Casting an ingot, c. Melting the ingot, d. Casting the casting, whereby iron borides and / or iron-nickel mixed borides are formed in the alloy of the casting.

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 application introduces a device and method for enriching iron components in converter steel slag cooperated with nickel slag / copper slag, wherein the device for enriching iron components comprises a ladle car, a ladle, an electrode and a furnace cover; the ladle is placed on the ladle car, the furnace cover is placed on the top of the ladle, the bottom working layer of the ladle is lined with a gas-permeable brick, the gas-permeable brick is in communication with an external air pipe, the electrode can pass through the furnace cover and be immersed into molten slag. Based on the above device, the application also designs a use method of the device for enriching iron components in converter steel slag cooperated with nickel slag / copper slag, which realizes online enrichment of iron components and reconstruction of non-iron components in the rich-iron nickel slag / copper slag and converter steel slag by placing the molten rich-iron nickel slag / copper slag and converter steel slag in the ladle for mixing and heating. The use method of the above device for enriching iron components is suitable for industrial production and also gets rid of the high dependence on quicklime CaO in the existing method.

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 invention discloses high-temperature anti-oxidation iron-nickel-based alloy powder for 3D printing. The alloy powder is characterized by comprising the following components in percentage by weight: 28% of Ni, 7.0% of Co, 9.0% of Mo, 14.5% of Cr, 0.5% of Ti, 1.2% of Al, 3.0% of W, 0.15% of C, 37.21% of Fe, 0.6-0.8% of vanadium V, 2.2% of Nb, 0.05% of strontium and 0.05% of lanthanum, 0.05% of Zr, 0.01% of B and 0.25% of Ta, and impurities are controlled as follows: less than or equal to 0.015% of oxygen (O), less than or equal to 0.010% of nitrogen (N), less than or equal to 0.015% of sulfur and less than or equal to 0.015% of phosphorus. The preparation method of the alloy powder comprises the steps of material preparation, smelting and argon atomization, and the alloy powder has good characteristics, is applied to 3D printing, is remarkable in softening resistance in a high-temperature state, and is an excellent material capable of being used for aerospace and injection molds.

The present application relates to the technical fields of high temperature creep test, in particular to a method for obtaining high temperature creep parameters of iron-nickel based alloy, which mainly determines the creep strain model of iron-nickel based alloy, obtains the creep strain rate calculation formula from the creep strain model, implements two creep tests of target test material under two different creep stresses at target temperature, respectively obtains the creep curves corresponding to creep time and creep strain, selects two creep times at the first stage and the second stage of the two creep curves respectively, obtains the creep strain and creep strain rate under the creep stress corresponding to the two creep times respectively, substitutes into the creep strain model and the creep strain rate calculation formula, and calculates the variable parameters of the creep strain model. The evaluation process of the creep model is greatly simplified, the required number of creep tests and test time are reduced, and the test cost is reduced.