38results about How to "Avoid secondary oxidation" patented technology

The invention provides a refining method for increasing nitrogen in the vacuum process of a VD vacuum furnace, and relates to the technical field of ferrous metallurgy, the refining method comprises the following steps: S1, refining molten steel in an LF steel ladle by adopting nitrogen as bottom blowing gas; and S2, the molten steel obtained after LF ladle refining is placed in a VD vacuum furnace, nitrogen serves as bottom blowing gas, the nitrogen flow and the vacuum degree are adjusted in a multi-stage mode, and the nitrogen increasing operation is completed. A multi-stage adjustment mode is adopted, and the nitrogen content in the molten steel is controlled by controlling the nitrogen flow, the vacuum degree and the retention time.

The utility model relates to an argon protection device for a lower pouring steel ingot ladle collector nozzle, and belongs to the technical field of die casting production in the metallurgical industry. According to the technical scheme, the device comprises a steel ladle collector nozzle (1), a sealing cover (2) and a central injection pipe (3), the sealing cover (2) is arranged between the steel ladle collector nozzle (1) and the central injection pipe (3), a center hole (5) matched with the steel ladle collector nozzle (1) is formed in the center of the sealing cover (2), the sealing cover (2) is provided with two circles of air chambers around the center hole (5), and the two circles of air chambers are communicated through a communication channel (8). Wherein one circle of gas chamber is communicated with an argon pipeline (9), and a nozzle (10) is arranged below the other circle of gas chamber; argon sprayed out of a nozzle (10) below the outer ring gas chamber (7) forms an argon protection gas curtain (11) around the central injection pipe (3). The steel ladle collector nozzle has the advantages that in the pouring process, air around the steel ladle collector nozzle can be isolated, external air is prevented from entering molten steel, and secondary oxidation of the molten steel is avoided.

The invention discloses a normal-pressure smelting and casting process for Ti-containing stainless steel, which comprises the following specific process flows: step A, feeding designed raw materials into an intermediate frequency furnace for steel melting; the raw materials in the step B enter an AOD furnace for degassing, deslagging and refining to purify molten steel after being molten; step C, transferring into an intermediate frequency furnace, adding composite slag to make high-alkalinity reducing slag, and covering the molten steel surface with the high-alkalinity reducing slag; d, after the white slag is kept stable, TiFe starts to be added; e, steel tapping is prepared; f, tapping is started after the components are adjusted to reach the standard; g, blowing argon in the whole tapping process, adding a final deoxidizer for final deoxidation protection, and quickly transferring the steel slag into a steel ladle; and H, product casting molding is conducted. Compared with the prior art, argon blowing is adopted in the whole process to isolate outside air, refining is conducted through the AOD furnace, the content of N and the content of S in the molten steel are reduced through argon blowing and oxygen blowing, and a stable reducing slag system is established to cover the molten steel surface in the whole process so as to protect the surface of the molten steel from being oxidized.

The invention relates to the technical field of ferrous metallurgy casting, in particular to a drainage sand removing and recycling method and device. Comprising a mechanical arm, a lifting rotation controller, a controller arm, a sand suction cylinder, a sand conveying pipeline, a sand collecting tank and an injection pump. The lifting and rotating controller is fixedly mounted on the mechanical arm; the controller arm is connected with the lifting and rotating controller, and the lifting and rotating of the controller arm are controlled by the lifting and rotating controller; the sand suction cylinder is connected with the controller arm, the sand suction cylinder is of a U-shaped structure, and one end of the sand suction cylinder is a horn mouth used for sucking drainage sand; one end of the sand conveying pipeline is positioned above the tundish cover sprue gate, and the end part of the sand conveying pipeline is bent downwards to be connected with the other end of the sand suction cylinder; the other end of the sand conveying pipeline is connected with the sand collecting tank; the sand collecting tank is connected with an injection pump pipeline, and the injection pump provides suction power. The ladle filler sand, harmful gas in gaps of the ladle filler sand and a long nozzle and a small part of molten steel in contact with the ladle filler sand in a steel ladle can be discharged out of tundish molten steel and recycled.

The utility model belongs to the technical field of annular furnace smelting, and relates to a system for preparing a novel furnace material by adopting an ultra-thick material layer, which comprises an annular heating furnace and a flue gas circulation subsystem, and the annular heating furnace is sequentially divided into a forced air drying section, an air draft preheating section, a reaction section, a first-stage cooling section, a second-stage cooling section and a discharging section according to the rotating direction; the flue gas circulation subsystem comprises a drying section fan cover, a preheating section fan cover, a reaction section fan cover, a cooling section fan cover, a drying section flue gas dust collection bin and a preheating section flue gas dust collection bin installed below the air draft preheating section. The reaction section flue gas dust collecting bin is mounted below the reaction section; the cooling section flue gas dust collecting bin is mounted below the primary cooling section and the secondary cooling section; a cooling medium conveying pipeline is connected to the bottom of the cooling section flue gas dust collecting bin, the cooling section fan cover is connected with the drying section flue gas dust collecting bin, the reaction section flue gas dust collecting bin is connected with the preheating section fan cover and the reaction section fan cover, and the drying section fan cover and the preheating section flue gas dust collecting bin are connected with a chimney.

The invention provides a preparation method of a silicon substrate for molecular beam epitaxy, which specifically comprises the following steps of: adding the silicon substrate into an organic solvent with certain purity, heating and ultrasonically cleaning, cleaning the organic solvent by using a small-molecule solvent, corroding an oxide layer on the surface of the silicon substrate by using strong acid, and removing the oxide layer, thereby obtaining the silicon substrate for molecular beam epitaxy. And cleaning and drying by using high-purity deionized water and nitrogen, and degassing the substrate by using in-situ heating. By corrosion of hydrofluoric acid with proper concentration and degassing of the substrate at proper temperature, the cleaning effect is remarkably improved, and the high-quality substrate for molecular beam epitaxy can be quickly obtained.

The present invention relates to the technical field of resource processing of aluminum ash, and specifically to a resource processing method of aluminum ash. The resource processing method of aluminum ash provided by the present invention comprises the following steps: mixing aluminum ash, anode carbon slag and waste cathode carbon block and then mechanically activating to obtain a mixed material; placing the mixed material in a conductive device, and passing carbon dioxide gas and water vapor into the conductive device, then connecting a DC power supply to the conductive device, passing a 40A-50A DC current to make the mixed material reach 650-850°C, stopping the introduction of carbon dioxide gas and water vapor after the power is turned on, cooling, taking out the material, grinding, and then placing the ground material in an alkaline solution for leaching to obtain a sodium aluminate solution and solid slag. The resource processing method of aluminum ash provided by the present invention can effectively improve the aluminum oxide dissolution rate of clinker and reduce the nitrogen content in the solid slag.

This invention discloses Ni2Fe(SO4) 0.5 (OH)6(H2O) 3.85 This paper discusses / NF catalysts, their preparation methods, and applications, belonging to the field of catalyst synthesis technology. Using large-size nickel foam as a substrate, Ni₂Fe(SO₄) is directly prepared through one-step in-situ microwave-driven growth. 0.5 (OH)6(H2O) 3.85 The nanosheet array eliminates the need for subsequent loading or additional processing, simplifying the process and enhancing the bond between the catalyst and the substrate. This catalyst exhibits excellent performance in hydrogen production via water electrolysis, particularly in seawater electrolysis.

The utility model relates to the technical field of molten steel argon blowing, and discloses an argon blowing device for preventing secondary oxidation of molten steel, which comprises a supporting mechanism, a containing mechanism is fixedly arranged on the upper surface of the supporting mechanism, an argon blowing mechanism is clamped at the upper end of the containing mechanism, and an opening and closing mechanism is fixedly arranged at the upper end of the argon blowing mechanism. The upper end of the opening and closing mechanism is fixedly connected to the bottom end of the supporting mechanism. According to the argon blowing device, the argon blowing mechanism and the opening and closing mechanism are arranged at the upper end of the argon blowing device, when a user uses the argon blowing device, the argon blowing gun is combined with the vertical pipe and the annular pipe to blow argon to molten steel in the device, and the annular pipe located at the upper end of the interior of the device can form an argon protection layer in the cavity above the interior of the device; and the one-way exhaust valve is used for exhausting, so that secondary oxidation caused by contact with air during use of the device is prevented, and the overall practicability and use effect of the device are improved.

This invention discloses a continuous drawing production method for aluminum alloy cable conductors. The specific steps of the production method are as follows: S100, pre-treating the aluminum alloy rod blank to make it ready for drawing; S200, using a non-sliding wire drawing machine driven by a motor, and configuring a roughing die, a medium drawing die, and a fine drawing die in sequence according to the drawing order; S300, setting a fracture early warning processing mechanism between adjacent drawing dies, which includes an acoustic emission sensor, a temperature sensor, a diameter gauge, an eddy current flaw detector, and a tension sensor; S400, continuously drawing the pre-treated aluminum alloy rod blank through the roughing die, the fracture early warning processing mechanism, the medium drawing die, the fracture early warning processing mechanism, and the fine drawing die in sequence; during the drawing process, each fracture early warning processing mechanism collects real-time data on the acoustic emission, temperature, wire diameter, surface defects, and tension of the aluminum conductor at the corresponding position; S500, after drawing, sending the conductor into an online annealing device for continuous annealing treatment.

The invention provides a method for composite deoxidation of aluminum killed steel and control of steel cleanliness, which comprises a converter process and a continuous casting process, when 1 / 10-1 / 9 of converter tapping is carried out, a deoxidation composite alloy, an aluminum-iron alloy, a silicon-iron alloy and a silicon-manganese alloy are added into a steel ladle to carry out deoxidation alloying, and argon is blown from the bottom of the steel ladle to forcibly stir in the tapping process; in the continuous casting process, argon is blown to the bottom of molten steel in a steel ladle in the first middle stage of steel ladle pouring; the deoxidized composite alloy is spherical, the inner core is calcium-magnesium-iron alloy, the middle layer is aluminum-silicon-iron alloy, and the outer layer is steel ladle slag modifier. According to the invention, the inclusion in the steel is modified by active metals such as magnesium and calcium in the deep part of the steel ladle, and the problems of low alloy yield and large environmental smoke caused by the reaction on the surface of the molten steel by directly adding iron alloys such as magnesium and calcium are avoided. After the method is applied, the number of Al2O3 inclusions larger than or equal to 3 microns in a casting blank is reduced by 50% or above, and the number of non-metal oxide inclusions is reduced by 48% or above.

The invention discloses a method for refining low-carbon low-sulfur steel through vacuum carbon deoxidation, and relates to the technical field of molten steel external refining. The process method comprises the following steps: carrying out pre-deoxidation by adopting a carbon source alloy material without using a metal deoxidation material; vacuum carbon deoxidation treatment is carried out under the condition that the vacuum degree is smaller than or equal to 100 Pa; the flow of the stirring gas is controlled to be 0.2-1.0 NL / (t.min); controlling the vacuum holding time to be not more than 5 minutes and the vacuum period to be not more than 15 minutes; the method comprises the following steps: controlling the tapping temperature of a primary smelting furnace to be 1620-1680 DEG C; in the LF station refining process, the binary alkalinity of refining slag is controlled to be 5.0-8.0, and diffusion deoxidation and white slag making are conducted in cooperation with a metal deoxidizing agent; the low-carbon and low-sulfur steel is produced through organic combination of vacuum carbon deoxidation and LF refining on the premise that a metal deoxidation material is not used for pre-deoxidation, the total oxygen content in the steel can be controlled to be 15 ppm or below, and the sulfur content can be controlled to be 0.005% or below.

The present application belongs to the technical field of metallurgical slag thermodynamics and phase equilibrium measurement, and discloses a high-temperature phase equilibrium determination method for a vacuum sealed slag system containing low-valence titanium oxide. The raw materials are roasted or dried; the high-temperature resistant container is filled with the raw materials according to the preset component proportioning, placed in a quartz tube, and deoxidizers are added; after vacuum preheating, argon gas washing, and high-temperature melting and sealing under the control of the vacuum degree in the tube, a thermodynamic closed system is formed; the slag sample is kept at the experimental temperature until it reaches thermodynamic equilibrium, and then it is rapidly quenched to retain the high-temperature phase structure; finally, the phase equilibrium determination is completed through characterization means. The present application uses a closed system, effectively isolates the interference of external gas, relies on the slag sample itself to establish and maintain the ultra-low oxygen potential required for the stable existence of low-valence titanium oxide based on the redox balance, solves the technical problem that the traditional oxygen control method cannot meet the phase equilibrium determination of the slag system containing low-valence titanium oxide, and realizes the accurate and reliable determination of the phase diagram of the slag system containing low-valence titanium oxide at the steelmaking temperature.

This invention discloses a raw material pretreatment method for zone melting purification of high-purity aluminum, belonging to the field of non-ferrous metal refining technology. The pretreatment method includes alkaline washing, acid neutralization, cleaning and drying, and vacuum-protected loading steps. High-purity aluminum raw material is immersed in a 5-8% sodium hydroxide aqueous solution at room temperature for 5-30 seconds, and removed when bubbles begin to form on the substrate. The alkaline-washed aluminum material is then immersed in an 8-12% nitric acid or acetic acid aqueous solution for neutralization for 10-20 seconds. After acid neutralization, the aluminum material is cleaned and dried, then placed in a zone melting furnace. A vacuum is drawn, and inert protective gas is introduced to atmospheric pressure or a slightly positive pressure. This method thoroughly removes oxide scale from the surface and bonding surfaces of the aluminum material, effectively preventing secondary oxidation during post-treatment transfer and loading. It creates continuous and unobstructed molten pool propagation conditions for the zone melting process, ensuring the smooth progress of the purification process and the high quality of the final product. This method is particularly suitable for eliminating oxide scale on the bonding surfaces of segmented aluminum rods to ensure the smooth operation of the zone melting process.

The utility model discloses a quick-change submersed nozzle with stable back pressure, and relates to the technical field of metallurgy. The submersed nozzle comprises a submersed nozzle body, a molten steel channel formed in the middle of the submersed nozzle body, a bowl part formed on the upper portion of the submersed nozzle body, a slag line and a side hole, the slag line and the side hole are formed in the lower portion of the submersed nozzle body, and a breathable layer, a sealing piece and an argon blowing device are arranged on the bowl part. The breathable layer is embedded in the top end of the bowl part and is flush with the top surface of the bowl part, the sealing pieces are embedded in the edges of the inner side and the outer side of the breathable layer and are flush with the top surface of the breathable layer, and the argon blowing device is used for conveying argon to the breathable layer. According to the quick-change submersed nozzle, the problem of inter-plate air suction between the upper nozzle and the submersed nozzle can be effectively solved, the stable argon flow is maintained, the argon blowing sealing effect is improved, non-oxide inclusions generated by air suction are reduced, and the quality of molten steel is improved.

This invention relates to a method for preparing aluminum nitride powder with low lattice oxygen content and its application, belonging to the field of aluminum nitride technology. The invention involves pretreating aluminum nitride powder with a coupling agent, then coating it with a nitrogen-containing resin precursor through in-situ polymerization and low-temperature pyrolysis to obtain aluminum nitride powder with low lattice oxygen content. This powder is then mixed with a ternary eutectic nitride additive composed of silicon nitride, boron nitride, and germanium nitride, and subjected to low-temperature reduction, high-temperature densification, and annealing to obtain aluminum nitride material with low lattice oxygen content. Through the synergistic effect of carbothermic reduction deoxidation, lattice oxygen replacement, and nitrogen vacancy repair, extremely low lattice oxygen content is controlled, simultaneously inhibiting oxygen re-dissolution and reducing phonon scattering, significantly improving the thermal conductivity and resistance to damp heat aging of aluminum nitride ceramics. The aluminum nitride powder prepared by this invention exhibits low lattice oxygen content, excellent thermal conductivity, and resistance to damp heat aging.

This invention discloses a method for controlling inclusions in titanium-containing ultra-low carbon steel. The steelmaking process is as follows: converter process – LF process – RH process – slab continuous casting process. After aluminum deoxidation and alloying in the RH process, low-reactive slag is added. As the vacuum molten steel circulates, this slag floats to the surface and remains at the steel-slag interface, hindering oxygen transfer from the ladle slag to the molten steel. Simultaneously, this substance has the ability to adsorb inclusions in the steel. By controlling the process parameters of the RH process, oxygen transfer from the ladle slag to the molten steel is effectively prevented, avoiding secondary oxidation of titanium and aluminum elements in the deoxidized steel and controlling the inclusion content in the steel. This invention's control method effectively prevents oxygen transfer from the ladle slag to the molten steel and avoids secondary oxidation of easily oxidized elements such as titanium and aluminum in the deoxidized steel, resulting in significant economic and social benefits.

The utility model relates to the technical field of continuous casting tundishes, and discloses a horizontal continuous casting tundish capable of preventing secondary oxidation of molten steel. The horizontal continuous casting tundish for preventing secondary oxidation of the molten steel comprises a tundish body, a connecting ladle is fixedly installed on the inner wall of the tundish body, inclined blocks are fixedly installed on the two sides of the inner wall of the tundish body, a metal rod is fixedly installed on the lower portion of one side of each inclined block, and a telescopic rod is movably connected to the upper portion of each metal rod. And a supporting rod is fixedly mounted on one side of the upper portion of the telescopic rod, a mounting sleeve is fixedly mounted on one side of the supporting rod, an argon conveying pipe is fixedly mounted on the inner wall of the mounting sleeve in a penetrating mode, and one end of the argon conveying pipe is movably connected to the inner wall of the connecting bag. The height of the argon conveying pipe can be conveniently adjusted for use, adjustment and use can be conveniently conducted according to the content of molten steel in the tundish structure, the use effect of the tundish secondary oxidation preventing structure can be conveniently improved, and normal work and use of continuous casting are facilitated.

The application discloses a preparation and use method of a NbTi superconducting wire low-temperature inlay welding flux, and relates to the technical field of superconducting wires, and comprises the following steps: heating deionized water to 50-60 DEG C; respectively water-bath heating short-chain alkyl glycoside and polyethylene glycol in the water at 50-60 DEG C for 30-60 seconds; stirring the obtained hot deionized water under the condition of 100-150 r / min, and adding the obtained short-chain alkyl glycoside and polyethylene glycol; and adding xanthan gum and sodium benzoate into the obtained solution in sequence to obtain the flux. The application uses short-chain alkyl glycoside as the main component of the flux; the addition of a thickening agent realizes the physical covering of the copper material surface and prevents the secondary oxidation of the copper material, so that the completely environment-friendly flux meeting the enterprise sewage discharge standard is suitable for the low-temperature inlay welding WIC conventional product with the largest base number, and the obtained WIC product has very low surface residue.

This invention relates to a high-efficiency ultrasonic six-axis machining center, belonging to the field of aerospace material processing technology. It includes a support frame, with a PU conveyor platform fixed to its upper surface. A crossbeam is fixed to the upper surface of the PU conveyor platform, and a cutting area is located on the upper side of the crossbeam. A dustproof processing mechanism for fully enclosed processing of the cutting area is provided on the upper side of the PU conveyor platform. This high-efficiency ultrasonic six-axis machining center, through the synergistic effect of the dustproof processing mechanism, utilizes a fan A to drive airflow through a hollow plate, air duct, and air curtain gun A to form a positive pressure laminar flow air curtain surrounding the cutting area, effectively blocking the outward diffusion of fine dust. Simultaneously, a hanging pipe, side suction pipe, and suction head are used to powerfully suction the settled dust inside the sealing frame and below the PU conveyor platform, achieving dual control of dust source suppression and end-point collection. Furthermore, a rubber wheel driven by an electric push rod can dynamically seal the gap between the sealing frame and the workpiece.

This invention discloses a high-toughness asphalt mixture modified from waste plastics and rubber, and its application. It relates to the field of asphalt mixture preparation technology, comprising 80-150 parts of base asphalt, 2-8 parts of modified waste plastic particles, 4-12 parts of activated waste tire rubber powder, 100-150 parts of aggregate, and 30-40 parts of mineral filler. This invention adds silane-coupled waste plastic particles and microwave-activated waste tire rubber powder to the asphalt mixture, limiting the mass ratio of modified waste plastic particles to activated waste tire rubber powder to 1:(1.5~2). The aggregate and mineral filler fully fill the gaps, synergistically solving the defects of high low-temperature brittleness and insufficient high-temperature performance in asphalt. This results in a mixture with excellent high-temperature stability and low-temperature crack resistance, and significantly improved performance reproducibility.

The present invention discloses a flow-guiding impact pad, which is specifically applied to a T-type tundish. Its three right-angled or inwardly inclined sidewalls can suppress the turbulence of the incoming molten steel and alleviate the fluctuation of the molten pool liquid level; an outwardly inclined sidewall can play a role in guiding the molten steel / argon gas stream into the T-type tundish with a larger space to allow it to mix and dissipate turbulence, thereby alleviating the scouring and erosion strength of the impact pad, preventing it from being damaged and extending its service life. The molten steel after drainage carries argon bubbles and is dispersed into the tundish molten pool, increasing the action area for the bubbles to collide with inclusions and float up for removal, which is beneficial to the aggregation, growth and removal of inclusions. At the same time, the impact force of the dispersed argon bubbles on the top slag is reduced during the floating process, thereby alleviating the exposure of the molten steel and the formation of "slag eyes" in the tundish, effectively preventing the secondary oxidation of the molten steel, and improving the removal effect of inclusions, thereby improving the cleanliness of the molten steel and the quality of subsequent products.

The invention relates to a magnetic control rotational flow steel ladle and a clean steel refining method. The magnetic control rotational flow steel ladle comprises a steel ladle with a shell made of non-magnetic steel; the electromagnetic induction assembly is arranged on the periphery of the steel ladle; the cross section of the steel ladle is round, at least one argon through hole is formed in the bottom of the steel ladle, the distance between the center of the argon through hole and the circle center of the bottom of the steel ladle is 1 / 2-3 / 4 of the radius of the bottom of the steel ladle, the argon through hole is filled with a porous air brick, and the porous air brick is connected with an argon source. Argon bubbles are blown to molten steel in a steel ladle through the eccentrically-arranged porous air brick, the electromagnetic induction assembly provides an external magnetic field for the molten steel to drive the molten steel to horizontally rotate, and due to the fact that the position of the argon through hole deviates from the circle center of the bottom of the steel ladle, the argon bubbles are distributed in the steel ladle in a dispersed mode along with the horizontally-rotating molten steel; and the argon bubbles can capture small-particle inclusions in the molten steel easily, impact on a slag-gold interface is restrained through the argon bubbles distributed in a dispersed mode, slag holes are restrained from being formed, and the quality of clean steel is improved easily.

The argon blowing device comprises a crystallizer body, a crystallizer upper opening, a submersed nozzle and an argon blowing mechanism, the crystallizer body is of a hollow cuboid structure, the crystallizer upper opening is formed in the top of the crystallizer body, the submersed nozzle is vertically arranged in the middle of the crystallizer upper opening, and the argon blowing mechanism is placed at the position of the crystallizer upper opening. The argon blowing mechanism comprises a steel pipe frame, a steel pipe opening, a metal hose, a ball valve and a supporting assembly, the argon blowing device has the advantages of being novel in structural design, convenient to use, low in manufacturing cost, easy and not tedious to operate, small in maintenance amount and the like, only a small number of workers are needed for daily maintenance and point inspection, and the manual maintenance cost is reduced; and meanwhile, the crystallizer can be filled with argon during casting before casting, the argon atmosphere is kept, molten steel is protected by argon all the time although the molten steel is not covered with casting powder in the casting process, secondary oxidation of the molten steel at the moment is prevented, and the quality of a head blank is obviously improved.

The utility model discloses a double argon seal continuous casting nozzle system which comprises an upper nozzle for continuous casting and a submersed nozzle, a first argon seal groove and a second argon seal groove are respectively arranged on sliding plate surfaces of the upper nozzle and the submersed nozzle, sealing blocks are arranged on the first argon seal groove and the second argon seal groove, an air inlet hole is arranged on the side surface of a sliding plate of the upper nozzle, and an air outlet hole is arranged on the side surface of the sliding plate of the submersed nozzle. The second argon sealing groove is communicated with the first argon sealing groove through a connecting hole, a connecting channel communicated with the second argon sealing groove is arranged on the inner side of the second argon sealing groove, and an exhaust hole is formed in the outer side of the second argon sealing groove. According to the utility model, two layers of argon protection air curtains are formed on the contact surface of the upper nozzle and the submersed nozzle, so that double-argon-seal protection pouring is realized in the process of molten steel from a tundish to a crystallizer, and argon is prevented from entering the inner cavity of the nozzle; the problems of submersed nozzle vibration, molten steel surface fluctuation in the crystallizer, molten steel bubbling in the crystallizer and the like caused by the fact that the molten steel enters the crystallizer together with the molten steel are solved, steel billet surface inclusion is remarkably reduced, secondary oxidation of the molten steel is eradicated, and the steel billet qualification rate is increased.

The environmentally friendly metal efficient cleaning agent of the present invention comprises sodium borohydride, sodium dodecylbenzene sulfonate, alcohol ether carboxylate, phytic acid, polymer dispersant, hydrofluoric acid, chelating agent and deionized water. Sodium borohydride is used to decompose micro-nano hydrogen bubbles to completely remove rust from parts, and then sodium metaborate and polymer dispersant are used to improve oil displacement capacity so that oil stains are separated from parts and decomposed, and then boric acid and phytic acid are used to perform rust prevention treatment on parts to avoid secondary oxidation, so as to achieve efficient removal of oil stains and rust on the surface of parts, and avoid the extension of the cycle caused by distribution; in addition, degradable additives with good environmental protection are used to reduce and control the discharge of phosphorus elements to avoid eutrophication of water bodies, and at the same time, metal ions in rust are recycled to achieve efficient and environmentally friendly cleaning process.

The utility model relates to the field of production equipment, and discloses a device for removing gallium oxide, which comprises a crucible, a heating assembly and a valve, a discharge pipe is arranged at the bottom of the crucible, the valve is arranged on the discharge pipe, and the heating assembly is used for heating the crucible; and a filter screen for intercepting solid substances is arranged in the crucible. Before gallium arsenide is produced, the raw material solid gallium is subjected to impurity removal treatment, the solid gallium is placed on the filter screen to be heated, by controlling the heating temperature, the solid gallium is molten into a liquid state to enter the crucible, gallium oxide and other impurities are intercepted by the filter screen, impurity removal is achieved, and the situation that the gallium oxide and other impurities affect the quality of a gallium arsenide finished product is avoided.

The utility model belongs to the technical field of welding equipment, and discloses induction thermocompression welding equipment for aluminum-clad steel wires, which comprises an induction coil, the induction coil is of a copper hollow structure, the inner diameter of the induction coil is 20-100mm, and the induction coil surrounds the outside of a welding area; the fixing mechanism comprises a welding clamp, the welding clamp comprises a left die and a right die which are symmetrically arranged, and the left die and the right die clamp the two ends of the steel wire correspondingly; the hydraulic device comprises a liquid transmission rod and a hydraulic control unit connected with the liquid transmission rod, and the hydraulic device drives the left mold and the right mold to move through the liquid transmission rod; and the shielding gas supply unit conveys argon to the welding area through the annular nozzle. Through the synergistic effect of segmented current regulation and control and a closed-loop hydraulic mechanism, multi-parameter collaborative optimization of heating temperature, pressure and displacement can be achieved, meanwhile, the problems that heat source control is insufficient and positioning precision is poor can be solved, and welding consistency is improved.

The invention relates to the technical field of alloy smelting, in particular to a high-aluminum and high-titanium iron nickel base alloy production process control method which comprises the following steps: acquiring a stirring characteristic F1 when the content of aluminum and titanium elements in slag is minimum and a stirring characteristic F2 when the stirring time is minimum, and acquiring a first stirring characteristic when the slag is optimal according to the content of the aluminum and titanium elements in the slag, and a second stirring characteristic when the stirring time is minimum; obtaining a final stirring characteristic according to the difference between the furnace slag components corresponding to the F1 and the first stirring characteristic of the F1, the sum of the stirring time of the F1 and the second stirring characteristic of the F1, the difference between the furnace slag components corresponding to the F2 and the second stirring characteristic of the F2 and the sum of the stirring time of the F2 and the first stirring characteristic of the F2; the final stirring characteristic is the stirring characteristic during argon bottom blowing after aluminum and titanium elements are added. According to the invention, slag entrapment and secondary oxidation are further prevented, and the production efficiency is improved.

This application discloses a vacuum plasma cleaning and protection device and method for aluminum alloys, relating to the field of aluminum alloy processing technology. The device includes a base, with a vacuum plasma cleaning chamber fixed to one side of the base surface. The vacuum plasma cleaning chamber contains an operation box, a vacuum chamber, electrode plates, a placement mesh frame, ventilation pipes, a vacuum pump, a sealing door, and a radio frequency power supply. A vacuum chamber is fixed inside the vacuum plasma cleaning chamber, and electrode plates are installed inside each vacuum chamber. A placement mesh frame is placed between the electrode plates. An operation box is fixed to one side of the vacuum plasma cleaning chamber. An ultrasonic cleaning chamber is fixed to the surface of the base, and an ultrasonic generator and a base plate are installed inside the ultrasonic cleaning chamber. The entire cleaning process is time-efficient and can effectively reduce the secondary oxide film generated during part transfer, thereby ensuring the metallurgical bonding quality between metals during welding.