17 results about "Invar alloy" patented technology

This invention discloses an Invar alloy steel ingot, its smelting method, and its applications, belonging to the field of alloy preparation technology. It solves the problems of low purity, large elemental segregation, numerous inclusions, and poor uniformity in existing Invar alloys. The composition of the Invar alloy steel ingot, by mass percentage, includes: Ni: 35.5%–36.5%, C ≤ 0.01%, Si: ≤ 0.05%, Mn: 0.30%–0.50%, Al: ≤ 0.02%, Mg: ≤ 0.05%, Zr: ≤ 0.05%, Ti: ≤ 0.05%, P: ≤ 0.005%, S: ≤ 0.001%, O: ≤ 0.0008%, N: ≤ 0.0005%, with the balance being Fe and other unavoidable impurities. The Invar alloy steel ingot of this invention has high purity, low impurity content, small elemental segregation, few inclusions, and good uniformity.

The present application relates to a kind of oil grinding agent suitable for ultra-thin invar alloy plate, pickling pretreatment method and pickling process, belong to the field of metal material surface treatment, at least one of the problems such as incomplete removal of existing direct pickling process, high risk of matrix overcorrosion, low pickling efficiency and poor surface quality uniformity is solved.One kind of oil grinding agent suitable for ultra-thin invar alloy plate, the oil grinding agent includes mineral oil and extreme pressure agent, the mass ratio of mineral oil and extreme pressure agent is (8-12):1.The present application realizes efficient stripping loose oxide layer, reduces pickling chemical burden, avoids matrix overcorrosion, improves overall efficiency, homogenizes initial surface state, and guarantees final treatment uniformity.

This invention discloses a Fe-Ni-Co-Cr-V-Nb-C-N multi-component Invar alloy and its preparation method. The alloy exhibits stable low expansion characteristics under different heat treatment conditions. In atomic percentage, the alloy is composed of the following chemical components: Fe 53-57%, Ni 21-24%, Co 15-17%, Cr 4-6%, V 0.1-1.0%, Nb 0.05-0.3%, C 0.4-1.0%, and N 0.05-0.3%. This invention yields a series of Fe-Ni-Co-Cr-V-Nb-C-N Invar multi-component alloys with significantly improved strength, solving the problem of low strength in traditional Invar alloys and further expanding the application range of Invar alloys in load-bearing environments.

This application provides an electropolishing method for Invar alloy substrates, specifically tailored to the surface characteristics of Invar alloy substrates thinned by ferric chloride reduction. The method involves using the Invar alloy substrate to be treated as the anode and a pure lead plate as the cathode, simultaneously immersing both the anode and cathode in an electrolytic tank containing an electrolyte for electropolishing. The electrolyte comprises phosphoric acid, sulfuric acid, malic acid, ethylene glycol, sodium dodecylbenzenesulfonate, and deionized water in a volume ratio of 6:1:1:1:0.5:0.5. Electropolishing the Invar alloy substrate thinned by ferric chloride using the above electrolyte composition and ratio yields an Invar alloy substrate with excellent surface quality. After polishing, the surface gloss of the Invar alloy substrate is increased to ≥92 GU, exhibiting a uniform and bright mirror-like effect.

This application relates to the field of diamond tool manufacturing technology, and discloses a heat-fatigue-resistant ceramic tile diamond saw blade and its preparation process. The heat-fatigue-resistant ceramic tile diamond saw blade includes a base steel disc and a diamond cutting head welded to its outer edge. The cutting head is made of a mixture comprising: a base matrix powder consisting of 40-50 parts of pre-alloyed copper-nickel alloy powder, 25-35 parts of elemental iron powder, 8-12 parts of elemental cobalt powder, and 13-17 parts of elemental tin powder; 5-10% Invar alloy powder, 1-3% elemental molybdenum powder, and 0.5-1.0% titanium hydride powder added according to the total weight of the base powder; and uncoated single-crystal diamond particles accounting for 15-25% of the total volume of the sintered cutting head. This invention uses a technical solution of pre-alloyed copper-nickel alloy powder combined with Invar alloy powder to adjust the matrix expansion rate, achieving the technical effect of reducing the alternating stress at the interface between diamond and metal binder.

The invention relates to the technical field of metal refining, in particular to an electroslag remelting process intelligent regulation and control method for invar alloy preparation, which comprises the following steps: acquiring current data and historical data; acquiring a basic power decline curve based on historical data; acquiring a pause section and a non-pause section according to the basic power decline curve; the degree that a temperature change rate curve of the cooling water gradually approaches 0, the degree that an electrode weight change rate curve gradually approaches 0 and the balance degree of input and output at the temperature measuring point are obtained through the current data corresponding to the pause section and the non-pause section; according to the degree that the temperature change rate curve of the cooling water gradually approaches to 0, the degree that the weight change rate curve of the electrode gradually approaches to 0 and the balance degree of input and output at the temperature measuring point, the matching degree of heat output and heat input is obtained; and adjusting the power decline rate based on the matching degree of the heat output and the heat input. According to the invention, accurate control and adjustment of the electroslag remelting process can be realized.

The present application relates to invar smelting technical field, a kind of smelting invar process method, comprising the following steps: step one: iron-nickel alloy raw material is loaded into intermediate frequency furnace, intermediate frequency furnace tapping temperature: 1590±20 ℃, intermediate frequency furnace ton steel power consumption 520±30 Kwh / t;Step two: after melting in intermediate frequency furnace, it is poured into AOD and smelted;Step three: after completing oxygen blowing and removing P in AOD, it is carried out to discharge slag;Step four: after AOD discharges slag, it is carried out to adjust composition, molten steel deoxidation;Step five: LF is carried out to adjust composition, temperature, and molten steel is processed into LF station.The present application is the first low-cost smelting invar process method in domestic, under the premise of guaranteeing product quality, can not use pure nickel resource and utilize more economical iron-nickel alloy raw material to produce the invar of component meeting the requirements, realizes the full use of iron-nickel alloy resources, greatly reduces invar production cost.

This invention relates to the field of precision alloy material processing technology, and discloses an Invar alloy precision strip for semiconductor displays, its preparation method, and applications. This invention controls sulfur content at the source and combines this with microalloying by adding 0.002–0.005 wt.% rare earth cerium (Ce) to strengthen grain boundaries and improve thermoplasticity. It innovatively employs an ultra-high purity smelting route of "vacuum induction melting (VIM) + two vacuum arc remelting (double VAR)" combined with intermediate forging to remove non-metallic inclusions such as oxides and reduce gas content, obtaining ultra-high purity ingots. Finally, through a multi-stage high-temperature diffusion forging, controlled rolling and cooling, multi-stage intermediate annealing, and precision cold rolling, a precision strip with a thickness of 0.10 mm is prepared. Through the above process, the strip prepared by this invention has extremely high purity, a uniform and fine microstructure (grain size 8–10), and excellent surface quality and shape, fully meeting the stringent requirements of semiconductor display devices for substrates.

This invention belongs to the field of solid-state hydrogen storage technology, and in particular, a constrained structure for a solid-state hydrogen storage device. It includes a bimetallic structure disposed within a hydrogen storage container. The bimetallic structure is composed of two metals or alloys with significantly different coefficients of thermal expansion. The bimetallic structure includes an active layer and a passive layer. The active layer includes at least one of brass, nickel-copper, and nickel-chromium alloys, while the passive layer includes at least one of Invar alloy, iron-nickel alloy, and stainless steel. When the temperature rises, the bimetallic structure bends towards the passive layer side; when the temperature drops to its original state, the bimetallic structure returns to its original shape. This invention offsets some of the stress experienced by the hydrogen storage tank during hydrogen absorption, extends the service life of the hydrogen storage module, prevents powder pulverization and migration, optimizes the hydrogen storage performance of the hydrogen storage tank, balances uneven hydrogen absorption and temperature distribution within the hydrogen storage tank, and improves overall hydrogen storage performance.

This invention discloses an Invar alloy slab and its preparation method, belonging to the field of alloy preparation technology. It solves the problems of existing Invar alloy slabs having numerous inclusions, significant segregation, and being prone to cracking, overheating, coarse grains, and poor uniformity during forging. The method includes: preparing an Invar alloy consumable ingot; the mass percentage of O in the consumable ingot is less than 0.0007%, the mass percentage of N is less than 0.0004%, and the consumable ingot is free of general segregation, ingot shape segregation, and general porosity defects; homogenizing the consumable ingot with a multi-stage heating and holding process; and forging the slab after homogenization annealing to obtain a final forging temperature ≥900℃. The preparation method of this invention ensures that the forging process does not crack or overheat, and the prepared Invar alloy slab has fine and uniform grains.

The present application relates to a kind of pickling process of ultra-thin invar alloy plate, belong to the field of metal material surface treatment, at least one of the problems in the prior art, such as incomplete removal of oxide layer, over-corrosion affecting strip quality and performance, and low pickling efficiency, is solved when the pickling process is applied to ultra-thin invar alloy plate.A kind of pickling process of ultra-thin invar alloy plate, comprising the following steps: surface pretreatment, oil grinding treatment, rinsing after oil grinding, pickling treatment, and post-processing.The present application realizes the balance of efficient removal of oxide layer and matrix protection, and improves pickling efficiency.

The application discloses a kind of invar alloy slab forging methods, belong to alloy preparation technical field, solve the invar alloy slab in prior art in the process of forging easy cracking, easy overburning, grain is coarse, the problem of poor uniformity.Forging method includes the following steps: preparation obtains invar alloy consumable ingot;The consumable ingot is homogenized annealing;Homogenization annealing includes multi-section temperature rising and holding;After homogenization annealing, slab is forged.The invar alloy slab forging method of the application can guarantee that the process of forging does not crack, does not overburn, and the prepared invar alloy slab has fine and uniform grains.

The utility model discloses a kind of low stress welding frames of invar alloy optical device, including the support base of support welding frame, the telescopic rod of relative motion is provided on the support base, the fixed plate is fixedly connected in telescopic rod top, the fixed plate side is fixedly connected with positioning cylinder, the connecting plate is sleeved on the positioning cylinder, the transmission rod is fixedly connected on the connecting plate one side. The utility model is through the big right angle plate and small right angle plate of being equipped, it is convenient to clamp the object of welding, simultaneously, by setting connecting plate, fixed plate and reversing motor one, it is convenient to rotate with object, adjust object surface angle, subsequent welding is facilitated to it, by setting the support base and telescopic rod of two-way movement in clamping mechanism bottom, it is convenient to adjust the height of welding object and clamping intensity, to make the low stress welding frame of this invar alloy optical device have the effect of adjustment, and increase the welding efficiency of laser to object.

The application belongs to the technical field of preparation of inconel alloy rod, and particularly relates to a preparation method of high-strength, high-plasticity and low-expansion inconel alloy rod, which comprises the following steps: according to the chemical composition requirements of the target inconel alloy rod, raw materials are weighed and proportioned, a first part of deoxidizing materials is used to heat smelting materials in a vacuum environment to obtain molten steel, a second part of the deoxidizing materials is used to refine the molten steel to obtain purified molten steel, alloying materials are added into the purified molten steel to obtain a steel ingot, and the steel ingot is heated, forged and cooled to obtain the inconel alloy rod. Through three times of molten steel purification, the oxygen content and the inclusion content in the alloy are effectively reduced, the rare earth Ce is used to form stable compounds with oxygen, sulfur and other elements by virtue of the strong affinity, and the stable compounds are removed by floating, and the as-cast grain growth is effectively inhibited, so that the strength and the plasticity are simultaneously improved on the basis of maintaining the low expansion coefficient.

The present application relates to the technical field of alloy preparation, and discloses an invar alloy steel ingot and a smelting method therefor, used for solving the problems in the prior art of low purity, large element segregation, a large variety of inclusions, and poor uniformity of invar alloys. The invar alloy steel ingot comprises the following components in percentage by mass: Ni: 35.5%-36.5%, C: ≤0.01%, Si: ≤0.05%, Mn: 0.30%-0.50%, Al: ≤0.02%, Mg: ≤0.05%, Zr: ≤0.05%, Ti: ≤0.05%, P: ≤0.005%, S: ≤0.001%, O: ≤0.0008%, N: ≤0.0005%, and the remaining being Fe and other inevitable impurities. The invar alloy steel ingot of the present application has high purity, low impurity content, small element segregation, few inclusions, and good uniformity.

This invention belongs to the field of alloy preparation and discloses a high-strength, low-expansion coefficient Invar alloy wire and its preparation method. The preparation method includes: selecting raw materials with the required purity and batching them according to the alloy composition ratio; smelting the raw materials using vacuum induction melting and casting them under a protective atmosphere to obtain an alloy ingot; subjecting the alloy ingot to hot deformation treatment, a first cold deformation treatment, aging treatment, and a second cold deformation treatment sequentially to obtain the Invar alloy wire. The hot deformation treatment temperature is 1180-1220℃, the cumulative deformation amount of the hot deformation treatment is 70-80%, the deformation amount of the first cold deformation treatment is 55-75%, the aging treatment process involves holding at 600-640℃ for 6-10 hours, and the deformation amount of the second cold deformation treatment is 75-90%. This invention achieves an alloy tensile strength >1500MPa, elongation >1%, and a low thermal expansion coefficient α (20-230℃) ≤2.55×10⁻⁶ by precisely designing the alloy composition and ratio and optimizing the preparation process parameters. ‑6 / ℃ and α (230~290℃) ≤ 8.12×10 ‑6 Performance indicators at / ℃.