324 results about "Ferrochrome" patented technology

The invention discloses an iron alloy electrode paste and a preparation process, and belongs to the technical field of electrode paste preparation, the iron alloy electrode paste comprises a composite aggregate system and a composite binder system, the composite aggregate system comprises the following components by mass: 40-60% of anthracite aggregate, 15-25% of artificial graphite flake, and 3-8% of silicon carbide whisker; the composite binder system comprises the following components in percentage by mass: 70-80% of medium-temperature modified coal pitch, 10-15% of furan resin and 5-10% of dispersion liquid containing nano boron carbide, and the composite binder system is combined with the composite aggregate system through a gradient permeation process to form a three-dimensional conductive network and an enhanced interface; the composite aggregate system and the composite binder system are optimally proportioned, and gradient permeation and gradient kneading processes are combined, so that the comprehensive performance of the electrode paste is remarkably improved, the thermal shock resistance is greatly improved and the linear shrinkage rate is reduced while low resistivity is maintained, the electrode paste is suitable for smelting ferroalloys such as silicomanganese and ferrochromium, and the service life is remarkably prolonged.

The invention discloses a method for melting and smelting ferrochrome in an all-oxygen hydrogen-rich low-carbon furnace, which comprises the following steps: (1) proportioning and uniformly mixing chromite pellets, coke and lime according to the mass ratio of 1: (0.15-0.2): (0.08-0.15), and filling the mixture into the all-oxygen hydrogen-rich low-carbon furnace; (2) high-temperature hydrogen-rich gas at the temperature of 900-1100 DEG C is introduced into the middle of the furnace body, and selective reduction of ferrochrome oxide is achieved; blowing industrial pure oxygen at the lower part of the furnace body, combusting with coke to generate CO, and driving a secondary reduction reaction; (3) maintaining a high-temperature environment in the furnace through oxygen-fuel combustion to completely melt the materials into molten iron, and carrying out central stirring on the molten iron to form a vortex with the height-diameter ratio of 0.5-1.5; and (4) discharging the molten iron after the reaction is completed. According to the method, the reduction rate of chromium in the chromite exceeds 92%, the carbon emission is reduced by 40% or above compared with a traditional blast furnace and submerged arc furnace process, meanwhile, the method has the advantages of being high in smelting efficiency, low in energy consumption, stable in product quality and the like, and a low-carbon and efficient innovative path is provided for ferrochrome smelting.

The invention relates to the field of design and preparation of powder metallurgy friction materials, in particular to a copper-based powder metallurgy friction material and a preparation method thereof. Raw materials used in the method comprise, by mass, 45%-55% of copper powder, 8%-20% of iron powder, 6%-15% of ferrochromium, 16%-22% of graphite, 0.5%-4% of molybdenum disulfide, 0.5%-4% of tin sulfide and 0.5%-4% of nickel-coated tungsten disulfide, and the mass ratio of the tin sulfide to the nickel-coated tungsten disulfide is (1-2): (1-2). In the nickel-coated tungsten disulfide, the content of nickel is 5-40%; the sum of the total amount of molybdenum disulfide, nickel-coated tungsten disulfide and tin sulfide is less than or equal to 5%. The preparation method comprises the following steps: weighing raw material powder according to the designed components, mixing, pressing and sintering to obtain the product. The composition design has the characteristics of scientificity, simple and controllable process and the like, and the obtained product has excellent tribological performance and completely meets the friction braking requirement of high-speed heavy-load equipment of 400km / h and above.

The invention provides an ultra-low carbon duplex stainless steel all-position welding flux-cored wire and a welding method thereof.The outer skin of the flux-cored wire is a stainless steel strip, the flux-cored wire is filled with powder, and the powder comprises, by mass, 18-25% of natural rutile, 20-30% of stainless steel powder, 20-30% of stainless steel powder, 20-30% of stainless steel powder and the balance stainless steel powder. 3-5% of sodium titanate; 5-10% of quartz sand; 0.5 to 4 percent of zircon sand; 1-3% of sodium fluoride; 15 to 25 percent of ferromolybdenum; 3-6% of nitrided ferrochrome; 2-4% of electrolytic manganese; 5-8% of nickel powder; 27 to 32 percent of metal chromium; 0.5-2% of magnesium powder; 0.5 to 1.5 percent of bismuth oxide; and 1-4% of silicon iron. The flux-cored wire is used for all-position welding of third-generation duplex stainless steel, welding spatter is small, and weld joint forming is good; the carbon content of a weld joint is extremely low, and through component and welding process control, weld joint metal has strength, plasticity, toughness and corrosion resistance equivalent to those of base metal. And the double requirements of high strength and toughness and high corrosion resistance in the manufacturing fields of submarine pipeline laying, shipbuilding, marine gas field exploitation and the like are ensured.

The invention discloses a concave-convex high-skid-resistance archaized brick and a preparation process thereof, and relates to the field of building materials. When the concave-convex high-skid-resistance archaized brick is prepared, ferrochrome waste residues, coal ash, argil, quartz sand, clay powder and red soil powder are subjected to mold pressing and roasting, and a green brick is prepared; mixing albite, quartz, calcite, zinc oxide, barium carbonate, deionized water, water glass and American water, glazing the surface of a green brick, and roasting to obtain an archaized brick matrix; the archaized brick base body is sequentially subjected to a reaction with 3-aminopropyltrimethoxysilane, 5, 7-dihydroxyflavone, 1H, 1H-perfluorooctylamine and 1, 3-propane sultone, and the concave-convex high-skid-resistance archaized brick is prepared. The concave-convex high-skid-resistance archaized brick prepared by the invention has good antibacterial, antifouling and coating durability effects.

The invention relates to the technical field of welding materials, and particularly discloses a high-temperature-resistant flux-cored wire containing rare earth elements and a preparation method of the high-temperature-resistant flux-cored wire. The high-temperature-resistant flux-cored wire containing the rare earth elements comprises a welding wire skin and a flux core. The flux core comprises the following raw materials of dehydrated rutile, dehydrated potassium feldspar, zircon sand, metal chromium powder, metal nickel powder, electrolytic manganese, ferrotitanium, ferro-aluminum, potassium cryolite, potassium titanate, sodium titanate, fine iron powder, yttrium-based iron alloy powder, atomized ferrosilicon, nitrided ferrochrome, bismuth oxide, auxiliaries and the balance reduced iron powder. The auxiliary agent is a mixture of a zirconium-iron alloy, a titanium-iron alloy and an aluminum-magnesium alloy. A specific alloy auxiliary is introduced into the flux core to protect stable transition of rare earth yttrium, yttrium and multiple components synergistically optimize the weld joint performance, 253MA heat-resistant steel is matched, slag and electric arc regulation and control components and a reasonable process are matched, and the welding quality of the welding wire is improved.

The invention discloses a high-carbon ferro-chrome smelting control method based on a submerged arc furnace, and relates to the field of high-carbon ferro-chrome smelting control, and the high-carbon ferro-chrome smelting control method comprises the following steps: constructing a three-dimensional temperature measurement network, generating temperature field distribution in the furnace based on three-dimensional space coordinates of all temperature measurement points, and further extracting boundary position coordinates and volume change trend of a molten pool; the method comprises the following steps: performing matching degree calculation on an electrode position impedance gradient curve and a molten pool boundary change trend to diagnose the structural stability of a crucible area, calculating the partial pressure ratio of key components based on hearth pressure, and comprehensively diagnosing the overall health state grade of the furnace condition in the furnace in combination with the structural stability state of the crucible area in the furnace; according to the diagnosed overall health state grade of the furnace condition, the proportion of the chromium ore, the coke and the flux is dynamically adjusted, accurate sensing of the multi-dimensional state in the furnace and grading diagnosis of the furnace condition are achieved, the problems of insufficient reduction of raw materials, waste of the chromium ore and the like can be avoided in time, and the product purity and the smelting stability are guaranteed.

The invention discloses a copper-based friction plate of a wind power high-speed shaft brake and a manufacturing method, the friction plate comprises a friction material, the friction material comprises a friction layer and a friction layer, the friction layer comprises the following raw materials in percentage by weight: 65-72% of copper powder, 1-6% of iron powder, 3-10% of high-carbon ferrochrome powder, 8-15% of copper-tin-titanium powder and 15-20% of graphite powder; 1 to 5% of TiB2; and the transition layer comprises the following raw materials in percentage by weight: 70-75.4% of iron powder, 23-28% of copper powder, 1-3% of graphite powder and 0.6-1.2% of copper welding powder. The friction plate in the technical scheme is low in cost, does not contain harmful elements such as lead, meets the environmental protection requirement, integrates the advantages of a copper-based friction plate and an iron-based friction plate, has a stable friction factor and good wear resistance, and has the friction performance superior to that of an imported friction plate.

The invention provides a flux-cored wire, a manufacturing method of the flux-cored wire, a gas-shielded arc welding method and deposited metal. The flux core of the flux-cored wire comprises the following components in percentage by weight: 27.5 to 29.5 percent of rutile, 1.0 to 2.0 percent of ferrovanadium, 0.2 to 0.3 percent of bismuth oxide, 0.8 to 1.2 percent of cryolite, 12.5 to 15.0 percent of high-carbon ferrochrome, 5.0 to 6.5 percent of electrolytic manganese metal, 4.5 to 6.5 percent of metal nickel, 1.0 to 3.0 percent of feldspar, 1.5 to 2.5 percent of ferromolybdenum, 1.0 to 2.5 percent of aluminum-magnesium alloy, 32.0 to 35.0 percent of micro-carbon ferrochrome, 0.5 to 1.5 percent of ferrotitanium, 1.15 to 2.85 percent of fluorite, 0.8 to 2.0 percent of ferrosilicon and 0.6 to 1.5 percent of lithium carbonate. In the invention, the alloy content of deposited metal and the hardness of the surfacing layer are controlled by adjusting the percentage of the flux core in the total weight, the surfacing layer with excellent corrosion resistance and proper hardness is ensured to be obtained, and the service life of the wrapper roller is prolonged. And meanwhile, by controlling all the components in the flux powder of the flux-cored wire and the proportion, the flux-cored wire has excellent welding process performance.

The invention belongs to the field of comprehensive utilization of chromite, and particularly relates to a method for producing high-carbon ferrochrome through chromite pellet prereduction-electric furnace smelting. According to the method, a reduction method that a reducing agent and chromite pellets are fed into a kiln separately is adopted, chromite oxidized pellets are prepared firstly and then reduced through a rotary kiln solid carbon reducing agent, and the obtained pre-reduced pellets are subjected to electric furnace smelting with a calcium flux and a magnesium flux as slagging fluxes to prepare the high-carbon ferro-chrome. The problem that according to an existing method, the metallization rate of the pre-reduced pellets and the adverse effect on electric furnace smelting caused by unstable carbon residues are solved, the production stability of the electric furnace can be improved, and meanwhile the electric furnace smelting temperature can be increased. The method is simple, controllable, low in energy consumption, high in efficiency, high in stability, low in production cost and convenient for industrial application.

The invention relates to the technical field of flux-cored wires, and discloses a high-rust-resistance flux-cored wire preparation method which comprises the following steps of S1, raw material pretreatment, S2, powder adding and forming, S3, surface modification and S4, finished product inspection. Before work is started, a worker prepares raw materials including high-carbon ferrochrome, tungsten carbide, boron carbide, rare-earth metal oxide and ferromolybdenum powder, then grinding equipment is used for grinding the raw materials, then the ground powder is dried for 2-3 hours through equipment at the temperature of 100-150 DEG C, the dryness of the raw materials is guaranteed, and the raw materials are evenly mixed. The method comprises the following steps: firstly, preparing a flux-cored wire, then uniformly stirring by utilizing three-dimensional mixing equipment, and then mixing and proportioning according to different proportions according to a corrosion-resistant flux-cored wire, an acid-base-resistant flux-cored wire and a high-hardness high-temperature-resistant flux-cored wire, so that the welding wires with corresponding properties can be conveniently used according to different environments, and the maximization of the functionality of the welding wire is improved.

The invention discloses a preparation process and application of high-carbon 17-4PH stainless steel powder, and relates to the technical field of powder metallurgy material preparation, and the powder is prepared from the following production raw materials by weight: 14-15% of industrial pure iron; 55%-58% of waste 304 stainless steel; 3%-4% of waste 316L stainless steel; 5%-7% of high carbon ferro-chrome; 6%-7% of micro-carbon ferrochrome; 0.7%-0.8% of metal molybdenum; 1%-2% of electrolytic manganese; 0.3%-0.6% of ferroniobium; and 9%-11% of electrolytic copper. According to the high-carbon 17-4PH stainless steel material and the preparation method thereof, the carbon content in the material is increased by filling high-carbon ferrochrome, so that the application performance of the 17-4 stainless steel material in the aspects of hardness and strength is improved, the preparation requirements of parts with higher hardness, strength and wear resistance are met, meanwhile, certain corrosion resistance of the material is kept, and the high-carbon 17-4PH stainless steel material has wider application fields.

The invention relates to the technical field of building materials, in particular to a coastal salinized soil curing agent and a preparation method and application thereof.The coastal salinized soil curing agent which is good in mechanical property, high in water resistance and good in curing effect is prepared by adopting air-cooled high-carbon ferrochrome slag powder as a main raw material, adding mineral powder and fly ash in a matched mode and adding Bayer process red mud and vulcanization sintering process red mud. The coastal salinized soil curing agent is low in energy consumption and low in manufacturing cost.

The invention discloses a method for smelting heat-resistant steel 0Cr25Ni20 through low-cost iron and P removal, and the method comprises the steps of material preparation, P and Fe removal treatment, material distribution, AOD (argon oxygen decarburization) refining, LF (ladle furnace) refining and continuous casting, and the chemical components of the heat-resistant steel 0Cr25Ni20 are controlled in percentage by mass: less than or equal to 0.080% of C; si < = 1.00%; mn < = 2.00%; p is less than or equal to 0.04%; s is less than or equal to 0.02%; ni: 19%-22%; according to the invention, a material separation form is adopted, heat-resistant steel for continuous casting of two furnaces can be produced at the same time, the process flow is convenient, the AOD smelting time is shorter, and the quantity production is guaranteed. The low control of p is realized, high manganese is used for replacing a manganese-iron alloy material, the production cost is reduced, the low-p molten nickel iron is smelted by removing iron and p from high-p pig iron, and the use of pure nickel is reduced. And common high-carbon ferrochrome is adopted, so that the use of imported ferrochrome is reduced. Meanwhile, the chromium melting water in the intermediate frequency furnace reduces oxidation of chromium and improves the recovery rate of chromium. Iron and p are removed at low cost, and iron-removed slag is recycled, so that the production cost is reduced while the production efficiency is improved.

The invention provides a high-toughness austenitic stainless steel welding rod for 5Ni steel and a preparation method of the high-toughness austenitic stainless steel welding rod. The welding rod comprises a core wire and a coating coated on the surface of the core wire, and based on the total amount of the core wire, the core wire comprises the following components in percentage by mass: less than or equal to 0.09% of C, less than or equal to 0.15% of Si, 1.6-2.5% of Mn, 18.5-20.5% of Cr, 12.5-14.5% of Ni, 2.1-3.2% of Mo and 0.06-0.18% of Ti; 0.12-0.24% of Al, less than or equal to 0.007% of S, less than or equal to 0.008% of P, less than or equal to 0.006% of O, less than or equal to 0.001% of H, less than or equal to 0.012% of S + P, and the balance Fe and inevitable impurities. On the basis of the total amount of the coating, the coating comprises, by mass, 28-38% of carbonate, 15-20% of fluorite, 1-3% of lithium fluoride and sodium fluoride, 8-12% of synthetic mica, 3-6% of potassium silicotitanate, 2-4% of zircon sand, 9-15% of electrolytic manganese metal, 2-4% of ferrotitanium, 2-5% of passivated nickel-magnesium alloy, 1-3% of atomized ferrosilicon, 1-3% of lanthanum cerium fluoride, 1-3% of tungsten and molybdenum, 3-5% of nitrided ferrochromium and 1-2% of CMC. The welding rod is good in all-position welding controllability, extremely low in air hole sensitivity and excellent in low-temperature toughness, and can meet the requirements for high-quality and efficient welding of 5Ni steel.

The invention discloses an ultralow-temperature high-toughness non-magnetic steel flux-cored wire for a controllable nuclear fusion device and a preparation method of the ultralow-temperature high-toughness non-magnetic steel flux-cored wire. A special stainless steel strip is adopted to wrap a metal powder type flux core, and the flux core accounts for 29.6%-30.4% of the total mass of the flux-cored wire; the flux core comprises the following components: 14%-18% of electrolytic manganese, 21%-23% of chromium metal, 0.3%-1.0% of ferrotitanium, 4.4%-5.0% of nitrided ferrochromium, 27.5%-28.5% of nickel powder, 0.5%-1.0% of 52 # ferrosilicon, 8%-9% of molybdenum powder, 0.1%-0.3% of lithium fluoride and the balance of atomized iron powder. The problems that an existing non-magnetic steel welding material is insufficient in toughness and high in magnetic conductivity at the ultralow temperature of-269 DEG C are solved by optimizing flux-cored alloy elements of (nickel-chromium-nitrogen) synergistic stable austenite, matching with a manufacturing process of sealed baking and roller die drawing forming of powder at the temperature of 120-140 DEG C and a welding process protected by argon (Ar) with the purity of 99.999%. The AKV2 of a welded joint is larger than or equal to 34J at the temperature of-269 DEG C, the tensile strength is larger than or equal to 620 MPa, the relative permeability is smaller than or equal to 1.02, the problems that nitrogen of an existing solid welding wire is difficult to control, and hardening is easy can be solved, and the welding wire is completely matched with the extreme working condition of a controllable nuclear fusion device.

Novel high-carbon ferro-chrome vibration screening equipment belongs to the related technical field of mineral aggregate screening equipment and comprises a material flow dividing device, a flow dividing valve is arranged in the material flow dividing device, the material flow dividing device comprises a first flow dividing path and a second flow dividing path, and the flow dividing valve can be remotely controlled; the second flow dividing path is connected with the vibration screening device, the vibration screening device is used for receiving materials needing to be subjected to vibration screening and conducting vibration screening on the materials, and large-particle materials screened out by the vibration screening device are directly output to participate in production. And small-particle materials and / or powdery materials screened out by the vibrating screening device are / is conveyed to downstream equipment. The material distributing device is arranged, materials are distributed and then subjected to vibration screening treatment through the vibration screening device, and different screened materials are subjected to different follow-up treatment according to requirements, so that the utilization rate of high-carbon ferrochrome is increased, waste of small-particle powder in the high-carbon ferrochrome is avoided, and the production and operation cost is reduced.

The invention provides a smelting method of high-manganese nitrogen-controlled copper-containing austenitic stainless steel. The technological process of an electric furnace (EAF), an argon oxygen decarburization furnace (AOD), a ladle refining furnace (LF) and a continuous casting machine (CCM) is adopted. By optimizing the alloy ratio, the molten steel is controlled to comprise the following components in percentage by weight: 0.040%-0.070% of C, 0.20%-0.60% of Si, 5.50%-7.00% of Mn, 3.00%-4.50% of Ni, 16.00%-18.00% of Cr, 0.080%-0.150% of N, 1.50%-2.00% of Cu, 0.0020%-0.0040% of B and the balance of Fe. According to the method, large ferrochrome / slag steel and nickel-copper alloy are adopted in the electric furnace stage to reduce the cost, nitrogen is accurately controlled through nitrogen / argon switching in the AOD stage, and ferroboron microalloying is conducted in the LF stage to improve the casting blank performance. The finally obtained high-manganese high-nitrogen copper-containing austenitic stainless steel has excellent corrosion resistance and cold working performance and can replace SUS304 to be used in the fields of household appliances, decoration and industry, and the purposes of reducing the production cost and improving the market competitiveness are achieved.

The invention discloses a low-cost and high-strength two-phase titanium alloy, which contains Ti and inevitable impurity elements, and also contains the following chemical elements in percentage by mass: 5.0%-7.0% of Al, 3.6%-4.5% of V, 0.4%-1.6% of Cr, 0.5%-1.3% of Fe and 0.06%-0.20% of O. The invention further discloses a manufacturing method of the two-phase titanium alloy. The manufacturing method comprises the steps that material preparation is conducted, wherein raw materials comprise sponge titanium, ferrochrome, TC4 titanium alloy return scraps and metal aluminum; smelting cast ingots; carrying out homogenization treatment; one-fire multi-pass rolling is adopted, the rolling speed is firstly slow and then fast during rough rolling, the rolling speed is firstly fast and then slow during finish rolling, online reversing is carried out between rough rolling and finish rolling, and air cooling is carried out after rolling.

According to the technical scheme, the high-carbon ferrochrome powder electric arc melting equipment is characterized in that the high-carbon ferrochrome powder electric arc melting equipment comprises a body mechanism, a connecting mechanism is installed at the outer end of the body mechanism, a melting mechanism is rotationally connected to the inner end of the body mechanism, and the melting mechanism comprises a rotating piece; the transmission end of the rotating piece is fixedly connected with a transmission wheel, and the outer end of the transmission wheel is connected with a plurality of second rotating wheels in an engaged mode. By arranging a transmission wheel and mixing rods, when the device needs to carry out mixing work, the transmission wheel is started to rotate to be meshed with a plurality of external rotating wheels II, so that the plurality of rotating wheels II simultaneously drive the plurality of mixing rods mounted at the inner end to carry out mixing work, and high-carbon ferrochrome powder in the smelting equipment body can be efficiently smelted; and in cooperation with self transmission of the smelting equipment body, internal raw materials are turned over, so that the equipment efficiently and uniformly performs smelting preparation, and the practicability of the high-carbon ferrochrome powder electric arc smelting equipment is improved.

This invention provides a high-hardness, crack-free flux-cored welding wire and its preparation method. The flux-cored welding wire includes an outer sheath and a flux core. By weight, the flux core comprises the following components: boron carbide 5.6-8.6 parts; 75% ferrosilicon 3.1-4.6 parts; electrolytic manganese 0.6-1.6 parts; 80% ferrovanadium 0.3-1.2 parts; nickel powder 0.3-1.0 parts; 68% high-carbon ferrochrome 67.5-94.5 parts; and iron powder 6-6.5 parts. The preparation method of the flux-cored welding wire is as follows: [The following components are listed:] boron carbide, 75% ferrosilicon, electrolytic manganese, 80% ferrovanadium... Ferrovanadium, nickel powder, 68% high-carbon ferrochrome, and iron powder are added sequentially to a dryer and dried for 2-3 hours. The mixture is then thoroughly mixed using a three-dimensional motion mixer and placed in an insulated box for later use. The outer sheath is placed on a forming machine, which rolls the outer steel strip into a U-shaped groove. Flux-cored powder is added to the U-shaped groove, and the forming machine closes and pulls the groove to obtain the flux-cored welding wire. The flux-cored welding wire of this invention features high hardness, no cracks, high temperature resistance, and corrosion resistance. Furthermore, the low production cost of the flux-cored welding wire facilitates industrial production.

The present invention discloses a method for deep dephosphorization of a chromium-nickel pig iron melt in an electric furnace, comprising: charging the chromium-nickel pig iron into an electric furnace and melting it into a chromium-nickel pig iron pre-melt; after the electric furnace is smelted clean, desiliconizing and dechromizing, adding a solid dephosphorizing agent, supplying oxygen through a furnace door oxygen lance, and adding lime to form slag; after stopping desiliconization and dechromization, skimming the slag and conducting electric furnace deep dephosphorization, adding a solid dephosphorizing agent, continuing to supply oxygen through the furnace door oxygen lance, spraying a powdered dephosphorizing agent through the electric furnace carbon powder lance, and adding lime to form slag; after completing the electric furnace deep dephosphorization, switching the furnace door oxygen lance to nitrogen for strong stirring. The present invention solves the technical problem of high cost caused by the difficulty of electric furnace dephosphorization of the chromium-nickel pig iron melt, which results in the need to use dephosphorized molten iron + pure nickel in stainless steel smelting. The present invention achieves the purpose of using cheap chromium-nickel pig iron as a raw material to prepare a low-phosphorus, high-nickel stainless steel mother liquor through electric furnace deep dephosphorization, and then producing a low-phosphorus special stainless steel variety by adding high-carbon ferrochrome to the low-phosphorus, high-nickel stainless steel mother liquor, thereby simplifying the production process and reducing smelting costs.

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 provides a preparation method of a high-wear-resistance alloy lining plate, and relates to the technical field of wear-resistance alloys, carbon steel and pig iron are mixed, heated and melted, high-carbon ferromanganese, medium-carbon ferrochrome and ferrosilicon are added, heating refining is carried out, aluminum powder is added, the mixture is put into a mold, cooling and demolding are carried out, heating homogenization, quenching and cooling are carried out, and a mother plate is prepared; mixing bismaleimide, the composite powder and sepiolite fibers, heating and stirring, coating a mother board with the mixture, firstly applying negative pressure, then applying positive pressure, heating and cooling to obtain a substrate layer; and placing the mother board in magnetron sputtering equipment, sputtering on the substrate layer to obtain a chromium nitride functional layer, and cooling to obtain the high-wear-resistance alloy lining board. The composite powder is prepared by mixing and heating chromium carbide powder and a hydrogen peroxide solution, filtering, mixing with an ethanol solution and gamma-aminopropyltriethoxysilane, heating, condensing and refluxing, washing and drying, and mixing and heating with amine-terminated polyether and N, N-dimethylformamide. The wear-resistant stability of the alloy lining plate can be improved.

The utility model discloses an ingredient mixing device for smelting high-carbon ferro-chrome, belongs to the technical field of ingredient mixing for smelting high-carbon ferro-chrome, and aims to solve the problem of poor or non-uniform mixing effect caused by a fixed angle of a stirring blade in the conventional mixing device. The tension spring is compressed by pressing the shovel plate, at the moment, the inner wall of the round hole is attached to one end of the clamping plate, the partition plate is separated from the clamping plate, then the angle of the shovel plate can be automatically adjusted according to the number of powder, after the angle of the shovel plate is determined, the force for pressing the shovel plate is released, and the tension spring drives the shovel plate to reset; the partition plate is clamped into the stirring rod again, at the moment, the stirring angle is fixed by the shovel plate, and the effect of mixing uniformity of the ingredient powder is improved.

The application discloses an energy-saving grinding ball and a preparation method thereof. The mass percentages of the respective components are as follows: ferrochrome: 60-65 parts, zirconia nanoparticles 1-2 parts, zirconia microparticles 3-6 parts, calcium tungstate 0.3-1 part, high-carbon steel 3-5 parts, ferrosilicon 5-6 parts, aluminum 2-3 parts, ferromanganese 2-4 parts, magnet 3-4 parts, tungsten-molybdenum alloy 2-3 parts, silicon carbide fiber 1-2 parts, copper 1-2 parts. The grinding balls prepared by the application show obvious advantages in terms of hardness, wear resistance and grinding efficiency. These technical advantages enable the grinding balls to have a broader application prospect in the industrial processing field and to provide a more efficient and more economical grinding solution.

The application relates to the technical field of welding materials, and particularly discloses a high-temperature-resistant flux-cored wire containing rare earth elements and a preparation method thereof. The high-temperature-resistant flux-cored wire containing rare earth elements comprises a wire sheath and a core; the core comprises the following raw materials: dehydrated rutile, dehydrated potassium feldspar, zircon sand, metal chromium powder, metal nickel powder, electrolytic manganese, ferrotitanium, aluminiferous iron, potassium cryolite, potassium titanate, sodium titanate, iron powder, yttrium-based iron alloy powder, atomized ferrosilicon, chromium-iron nitride, bismuth oxide, an additive, and the balance of reduced iron powder; the additive is a mixture of zirconium-iron alloy, ferrotitanium alloy and aluminum-magnesium alloy. The application introduces a specific alloy additive into the core to protect the transition of the rare earth yttrium, optimizes the welding performance of the yttrium and multiple components in cooperation, matches the 253MA heat-resistant steel, adjusts the components of the molten slag and the electric arc, and reasonably processes the technology, so that the welding quality of the wire is improved.

The invention discloses champagne rhinestones and a vacuum coating color changing method, and belongs to the technical field of rhinestones. The method comprises the steps that S101, a template is transferred, wherein rhinestones are transferred to the template; s102, bias plasma cleaning is conducted, specifically, the template is transferred to a coating chamber, vacuumizing and heating are conducted, and then bias plasma cleaning is conducted; s103, aluminum oxide layer plating: after vacuum cleaning, an aluminum oxide target material is adopted for vacuum coating to form an aluminum oxide layer, and the coating conditions are as follows: the current is 50-70 A, the time is 100-130 S, and the vacuum degree is 5.0-7.0 * 10 <-1 > Pa; in the step S104, oxygen is introduced, ferrochrome is adopted for vacuum coating to form the ferrochrome layer, and the coating conditions are that the current ranges from 50 A to 70 A, the time ranges from 220 S to 270 S, and the vacuum degree ranges from 7.5 * 10 <-1 > Pa to 9.0 * 10 <-1 > Pa; and S105, discharging is conducted, specifically, after cooling is conducted, air is introduced, and then the template is taken out of the coating chamber.

The utility model relates to the technical field of low-carbon ferrochrome smelting, and discloses a batching device for low-carbon ferrochrome smelting, which comprises a supporting table, a feeding assembly is arranged on one side of the supporting table, the feeding assembly comprises a feeding hopper and a stepping motor, a transmission rod is fixedly mounted on an output shaft of the stepping motor, and the transmission rod is connected with the feeding hopper. And a scraping strip is fixedly installed on one side of the transmission rod, a spiral conveying rod is fixedly installed at the bottom of the transmission rod, and a weighing assembly is arranged at the top of the supporting table. By arranging the weighing assembly and the weighing device, weighing can be conducted, so that quantitative materials are weighed, the electric push rod is controlled to stretch to push the material pushing plate, the connecting rod and the material blocking plate to move, the materials in the feeding box can be pushed into the feeding hopper, operation is easy, and discharging is convenient; wherein the transmission rod, the scraping strip and the spiral conveying rod can be driven to rotate by turning on the stepping motor, discharging is convenient, and wall sticking and blocking of materials can be prevented.

The invention relates to the technical field of stainless steel materials, and particularly discloses 304 stainless steel for a flow-limiting downward-opening type checkgate and a machining process thereof.The machining process comprises the steps that firstly, the surface of the 304 stainless steel is pretreated through aluminum oxide particles, the roughness of the surface of the stainless steel is increased, and then an aluminum-cobalt-chromium-iron-nickel high-entropy alloy layer is formed on the surface of the stainless steel through magnetron sputtering; aluminum is distributed in an alloy layer in a gradient mode by adopting a mode of improving the power of an aluminum target to form a gradient layer, and then subzero treatment, pulse circulation treatment, hole sealing by a hole sealing agent and annealing treatment are carried out, so that the 304 stainless steel for the flow-limiting open-type checkgate with good hardness, erosion resistance and corrosion resistance is obtained, the service life of the checkgate is prolonged, and the service life of the checkgate is prolonged. And the maintenance cost during weir gate replacement is reduced.