22results about How to "Reduce burning loss" patented technology

The application relates to an electromagnetic relay, which comprises a main contact part and a permanent magnet. A magnetic circuit part comprises an armature. The main contact part comprises a main static spring assembly and a main dynamic spring assembly. The main static spring assembly comprises a main static spring piece and a main static contact point arranged on the main static spring piece. The main dynamic spring assembly comprises a main dynamic spring piece and a main dynamic contact point arranged on the main dynamic spring piece. The main static contact point is arranged opposite to the main dynamic contact point. The permanent magnet is arranged on the side of the main static contact point away from the main dynamic contact point or on the side of the main dynamic contact point away from the main static contact point. The permanent magnet can form a longitudinal magnetic field between the main static contact point and the main dynamic contact point. Through longitudinal arc blowing, the electromagnetic relay can effectively reduce the burning loss of the main static contact and the main dynamic contact by an arc, shorten the arc burning time, and thus improve the electrical endurance and reliability of the electromagnetic relay.

The invention discloses a preparation method of an Al-RE intermediate alloy based on an alloy opposite doping method, which comprises the following steps: firstly, industrial pure aluminum Al and mother alloy Al-90RE are taken as raw materials, the raw materials are dried according to a mass ratio meeting the requirement of Al-(10-50) RE, then, the raw materials are melted by adopting a two-stage variable-temperature melting method to obtain an Al-RE melt, then, the Al-(10-50) RE melt is refined, and meanwhile, the Al-RE intermediate alloy is prepared by adopting an alloy opposite doping method. The steel ingot mold is preheated, and finally, the refined Al-RE melt is poured into the preheated steel ingot mold to be cooled, so that an Al-RE intermediate alloy ingot based on the alloy opposite doping method is obtained; rE is one of La, Ce or La + Ce alloy. The obtained Al-RE intermediate alloy is compact in metallographic structure and less in inclusion; in addition, the yield is greater than 90.0%.

The application discloses an aluminum-containing heat-resistant alloy with excellent comprehensive performance and a preparation method thereof, and belongs to the technical field of aluminum-containing austenitic heat-resistant alloy materials. The application solves the problem that the good oxidation resistance and high-temperature durability, and the high room-temperature strength and good elongation after fracture of the existing alloy cannot be compatible. The aluminum-containing heat-resistant alloy of the application contains the following components in percentage by mass: C: 0.3% to 0.6%, P: ≤0.02%, S: ≤0.01%, Cr: 24% to 30%, Ni: 46% to 60%, Al: 3% to 5.5%, W: 0.3% to 2.5%, Co: 0.1% to 1.0%, Nb: 0.1% to 2.0%, Zr: 0.01% to 0.2%, Ti: 0.01% to 0.2%, RE: 0.005% to 0.5%, and the balance of Fe and inevitable impurities.

This invention relates to the field of lightning protection technology for high-voltage transmission lines in power systems, specifically to a non-following current multi-stage gap lightning protection device and overvoltage protection method. The device includes multiple multi-stage gap bodies, a high-voltage fixing component, and a low-voltage fixing component. The two ends of each multi-stage gap body are connected to the high-voltage and low-voltage fixing components, respectively. Each multi-stage gap body includes multiple transverse electrodes. These transverse electrodes all point towards the space enclosed by the multiple multi-stage gap bodies and are arranged transversely at intervals in the longitudinal space, forming multi-stage discharge gaps between adjacent transverse electrodes. The high-voltage and low-voltage fixing components are respectively equipped with high-voltage and low-voltage electrodes. This invention employs a split-type distributed structure. The ingenious arrangement of multiple transverse electrodes forms exposed multi-stage discharge gaps, which can quickly guide the movement of the electric arc. The flashover path has stable and reliable discharge performance, effectively dissipating lightning energy and protecting the safety of the distribution network lines.

The application discloses a high-aluminum steel continuous casting method, which adopts zirconium drainage sand in a ladle to reduce the reaction between the drainage sand and molten steel, and adopts a tundish cover argon blowing technology to blow argon on the tundish cover hole or in the tundish cover refractory, so that the oxygen content of the atmosphere in the tundish is reduced from 17-21% to below 0.1%, and a large amount of secondary oxidation caused by air in the first furnace opening and the subsequent continuous casting process is avoided. The method greatly reduces the reaction between aluminum in the high-aluminum steel and the drainage sand and air, reduces the alloy element burning loss, reduces the Al2O3 inclusions, is beneficial to improving the quality of the final product, greatly reduces the nozzle clogging rate, makes the production more stable, increases the continuous casting furnace number, reduces the contact between the molten steel and air, and significantly reduces the nitrogen increase.

The application discloses additive manufacturing 5-series aluminum alloy powder material containing Ce and Yb elements and a preparation method thereof, and comprises the following steps: preparing a mixed material by weighing raw materials according to component proportions, and preparing Al-Mg-Sc-Yb-Ce-Mn-Si pre-alloy powder through vacuum melting and argon atomization, wherein the raw materials are as follows in terms of mass fraction: Mg: 4-12%, Sc: 0.6-0.8%, Zr: 0.1-0.8%, Mn: 0.2-0.5%, Si: 0.3-1.0%, Yb: 0.03-0.8%, Ce: 0.03-0.8%, and the rest is Al and other impurities. The application adds a certain amount of rare earth elements (Yb and Ce) and Mn and Si elements in the traditional AlMgScZr alloy powder, forms a second phase with alloy elements, plays a role in refining grains and improving crack resistance as a refining agent, controls the process, obtains powder with a certain particle size range through airflow screening, carries out additive manufacturing according to a certain process window, and through heat treatment, the strength of the additive manufacturing high-strength and high-toughness aluminum alloy is improved to 550 MPa level while maintaining high plasticity and toughness.

The application discloses a high-entropy alloy coating special for blue laser cladding and a preparation method thereof. (1 x) Ti x , and x is in the range of 0.25-0.75. The preparation method comprises the following steps: substrate pretreatment, alloy powder proportioning and ball milling mixing, and blue laser cladding. The application realizes the synergistic regulation of alloy phase composition and microstructure by Al and Ti elements, forms a FCC+BCC dual-phase structure, has fine and uniform grains, and is free of macroscopic cracks, and the precipitation of intermetallic compounds is significantly inhibited. The coating and the substrate are metallurgically combined, have high hardness, excellent wear resistance and corrosion resistance, the application fully utilizes the advantages of high blue laser energy absorption rate, stable molten pool and fast cooling rate, solves the problems of cracks, segregation and poor forming in infrared laser cladding, and is suitable for surface strengthening and remanufacturing in the fields of marine engineering, molds, aerospace and the like.

This invention belongs to the field of coking technology and relates to a quenching device and method suitable for small coke ovens. It includes a quenching oven, a water-cooled unit, and a gas heat exchange cooling device. The quenching oven includes a furnace body and a furnace door, with a cooling water circulation network on the side wall of the furnace body's inner cavity. A nitrogen inlet and an air outlet are provided on the furnace body. The nitrogen inlet is connected to an external nitrogen channel, and a gas shut-off valve is provided at the air outlet. The external nitrogen channel is connected to the nitrogen inlet via a nitrogen channel in the gas heat exchange cooling device. The outlet of the water-cooled unit is connected to both the cooling water inlet of the cooling water circulation network and the inlet of the cooling water channel in the gas heat exchange cooling device. The cooling water outlet of the cooling water circulation network and the outlet of the cooling water channel in the gas heat exchange cooling device are both connected to the inlet of the water-cooled unit. This invention solves the defects of high coke burn-off and long quenching time, while ensuring stable coke quality in small coke ovens.

The application relates to an aluminum-silicon-strontium-titanium-zirconium alloy and an aluminum-silicon-strontium-titanium-zirconium alloy welding wire prepared from the same and belongs to the technical field of aluminum alloy welding wires. The alloy components and the weight percentages are as follows: Si: 4.50-5.50%; Mg: 0.01-0.05%; Sr: 0.02-0.50%; Ti: 0.01-0.15%; Zr: 0.01-0.20%; La: 0.01-0.10%; Ce: 0.01-0.15%; C: <0.0010%; the balance is Al and inevitable impurity elements, and the content of the inevitable impurity elements is less than 1.0 wt%. The application further discloses an aluminum-silicon-strontium-titanium-zirconium alloy welding wire prepared from the aluminum-silicon-strontium-titanium-zirconium alloy. Through control of the alloy components and the content of each component, the welding wire formed by the application has excellent performance in alloy mechanical properties, casting performance, grain refinement and welding quality.

The invention relates to the technical field of bridge structure safety device manufacturing, in particular to a hot bending forming process of a fixing plate for a beam falling prevention device, which comprises the following steps: blanking of the fixing plate for the beam falling prevention device: selecting Q355 hot rolled steel, cutting the Q355 hot rolled steel to a preset size by using a laser cutting machine, blanking, and reserving 3-5mm machining allowance on two sides; according to the hot bending forming process, laser cutting blanking and milling machine finish machining are combined, material waste is reduced while the precision is guaranteed, the high-frequency rapid heating and hot forging forming process is adopted, the machining efficiency and material plasticity are remarkably improved, meanwhile, oxidation burning loss is reduced, and the product quality is improved. Meanwhile, a special tool cavity, a water cooling system and a profiling detection and shape correction technology are matched, the forming precision and the size stability are ensured, in addition, the technology is achieved based on conventional equipment, the comprehensive advantages of procedure simplification, cost reduction, efficiency improvement, performance optimization, forming precision and the like are achieved, and the method is suitable for batch production and has good industrial popularization value.

The invention discloses an endogenous titanium carbide reinforced ultrahigh-strength aluminum alloy and a green laser directional energy deposition method thereof, and relates to the technical field of aluminum alloy preparation, and the preparation method comprises the following steps: preparing an aluminum-titanium-carbon nanotube system compact; the aluminum-titanium-carbon nano tube system pressed blank is immersed into an aluminum alloy melt, titanium carbide pre-dispersion is carried out based on an in-situ reaction in the melt, and an endogenous titanium carbide reinforced aluminum alloy cast ingot is obtained; annealing and drawing the endogenous titanium carbide reinforced aluminum alloy cast ingot to obtain an endogenous titanium carbide reinforced aluminum alloy wire; the internally-coated titanium carbide aluminum alloy powder is prepared from the endogenous titanium carbide reinforced aluminum alloy wire, and the titanium carbide reinforced aluminum alloy is obtained through green laser directional energy deposition. The method is reasonable in technological process, has the advantages of being low in cost and short in period, and provides an innovative path for preparation of the high-performance additive manufacturing aluminum alloy.

This invention provides a pre-forging equipment and method for gear forging production, relating to the field of gear forging technology. It includes a waste collection module, a powder preparation module, and an extrusion bar module, as well as a circulation control module electrically connected to each of these modules. The waste collection module is used to classify and collect waste generated before and after gear forging, and then transport the waste to the powder preparation module. The powder preparation module is used to sequentially crush, grind, remove impurities, clean, dry, and classify the received forging waste to prepare a metal mixed powder, which is then transported to the extrusion bar module. The extrusion bar module is used to press the metal mixed powder filled in the die cavity into pre-forged billets of a preset specification, achieving high-value recycling of gear forging waste, replacing the traditional remelting method, significantly reducing energy consumption and metal loss, improving material utilization, and significantly reducing production costs.

The invention discloses a secondary aluminum composition which comprises basic components, impurities and aluminum, wherein the basic components comprise strontium, copper, iron, magnesium, silicon, carbon, titanium, vanadium and boron, and the content of the basic components is smaller than 15%; the content of the impurities is less than 0.9%; the invention relates to the technical field of secondary aluminum production, in the smelting process, fluoride can be adsorbed and the discharge rate of the fluoride can be reduced by using activated aluminum oxide, at the moment, rare earth elements and the fluoride can react to generate rare earth fluoride, and the rare earth fluoride can form second-phase particles containing rare earth in molten aluminum, so that the secondary aluminum is obtained. A good foundation is laid for follow-up structure and performance regulation and control, non-metallic inclusions are reduced, the surface tension, fluidity and viscosity of a melt are improved, and the effects of inclusion spheroidization and floating removal are facilitated.

This invention relates to the field of edge sensing and intelligent early warning technology for new power systems, specifically to an overload early warning system for distribution transformer areas based on an intelligent fusion terminal. By collecting three-phase voltage, three-phase current, and neutral current in the distribution transformer area, the system performs sequence component decomposition on the three-phase electrical parameters to construct unbalanced excitation parameters. Based on the unbalanced excitation parameters and neutral current, it calculates the thermal offset migration of the internal heat source of the transformer relative to the winding center, generating a thermal offset migration sequence and a thermal offset migration intensity index. Then, it combines the thermal offset migration to generate zoned thermal load values, which are input into the dynamic thermal circuit model of the distribution transformer to deduce the local additional thermal state of the transformer and output overload early warning information. This invention has a high ability to identify local abnormal heat accumulation caused by zero-sequence return current under three-phase unbalanced conditions, requires no modification to the transformer itself, and is suitable for low-cost intelligent upgrades of existing distribution transformer areas.

The present application belongs to the technical field of dry quenching coke production, and relates to a dry quenching coke transportation system and a dry quenching coke emptying and filling method, which is applied to the dry quenching coke transportation system and comprises a first hoist, a second hoist, a hoist derrick, a coke tank car running along a track, and a positioning device. The coke tank car preferentially performs a full tank filling operation, after the full tank filling operation is completed and the hoist places an empty tank on a transverse trolley carried by the coke tank car, the coke tank car continues to perform an empty tank receiving operation under the same hoist derrick. The present application adjusts the operation sequence of the coke tank car. In a working cycle, when the coke tank car carrying a full tank reaches under the hoist derrick and is clamped and positioned by the positioning device, the full tank is handed over to the hoist; after the full tank filling operation is completed and the hoist places an empty tank in place, the empty tank receiving operation is continued under the same derrick; and after the empty tank receiving operation is completed, the positioning device releases the coke tank car carrying the empty tank to drive away, which effectively reduces coke burning loss and heat loss, and reduces transportation power consumption.

The invention belongs to the technical field of copper alloy materials, and relates to a preparation method of a high-strength corrosion-resistant rare earth copper-iron alloy. According to the method, 10%-20% by mass of iron, 0.2%-1.0% by mass of rare earth copper alloy and the balance copper are designed and smelted into a cast ingot in a vacuum high-frequency induction furnace protected by argon, a thick bar is obtained through homogenization treatment at the temperature of 900-1000 DEG C and hot forging at the temperature of 900-950 DEG C, and then a rare earth copper-iron alloy strip with the thickness of about 0.1 mm is prepared through multi-pass rolling; the rare earth elements are added in the form of rare earth copper intermediate alloy coated with copper powder, so that the burning loss can be reduced, and the component uniformity can be improved. Microstructure observation and performance test show that the rare earth addition can significantly refine the iron phase and improve the distribution of the iron phase, so that the tensile strength and conductivity of the alloy are improved, and the salt spray corrosion rate is significantly reduced under the appropriate rare earth content; the rare earth copper-iron alloy prepared by the method has high strength and high corrosion resistance, and is suitable for manufacturing structural parts and functional parts in a harsh corrosive environment.

The present application belongs to the field of steel metallurgy and comprehensive utilization of vanadium-titanium resources, and particularly relates to a method for efficiently extracting vanadium from molten iron with top and bottom composite reinforcement. The technical scheme solves the problems of traditional converter vanadium extraction, such as difficult temperature control, uneven stirring, low vanadium oxidation rate, long converter blowing time, and fluctuation of vanadium slag quality. In the blast furnace tapping stage, modified cold solid balls and iron oxides are used as composite solid oxidants to pre-oxidize and extract vanadium using the impact kinetic energy of iron flow and quickly form initial slag. After the molten iron is poured into the vanadium extraction converter, top blowing of nitrogen-oxygen mixed gas and bottom blowing of CO2 are used for sectional stirring and composite reinforcement. No additional cooling agent is added in the converter, and precise temperature control is achieved to realize vanadium extraction and carbon preservation and improve the quality of vanadium slag. The vanadium oxidation rate is stable at ≥92%, the converter blowing time is shortened by more than 30%, the TFe of vanadium slag is reduced, the V2O5 grade is improved, and the efficiency of vanadium extraction and the recovery rate of vanadium resources are significantly improved.

The utility model provides a low-nitrogen flat flame burner, which belongs to the technical field of kiln burners, and comprises a main body, a gas pipe and a baffle ring, the main body is fixedly arranged on a kiln; a first cavity, a second cavity and a ventilation cavity channel communicated with the first cavity and the second cavity are formed in the main body; the gas pipe is coaxially arranged in the ventilation cavity channel; the gas pipe is provided with a connecting end and a gas outlet end, and the connecting end penetrates through the main body and extends out to be communicated with gas conveying equipment; the air outlet end is communicated with the second chamber; the baffle ring is arranged in the ventilation cavity channel and is coaxially and fixedly connected with the gas pipe; and in the direction from the first cavity to the second cavity, the outer diameter of the baffle ring is gradually increased, so that air passing through the ventilation cavity channel is spread back to the central axis of the gas pipe. According to the low-nitrogen flat flame burner provided by the invention, the baffle ring can prevent air from directly impacting the gas pipe, so that the air can be more uniformly distributed around a burning area, the stability of the root of flame is influenced, the blow-off phenomenon is reduced, and the service life of the burner is prolonged.

The utility model relates to the field of disconnecting switches, and discloses a direct current disconnecting switch contact system arc blocking supercharging device, which comprises a mounting seat, a first gas blocking cover, a second gas blocking cover, a plurality of pressure springs, a spring piece and a limiting pin, a mounting groove is formed in the inner wall, close to the static contact, of the shell of the direct-current isolating switch; a sliding groove is formed in the side face, close to the static contact, of the mounting base, and pin shaft holes are formed in the two sides of the sliding groove of the mounting base; a waist-shaped hole is formed in the first gas blocking cover; according to the utility model, through the arrangement of the first gas blocking cover and the second gas blocking cover which are elastically telescopic, electric arcs ejected away from the arc extinguish chamber during opening can be blocked, and the arc extinguishing effect is improved.

The application discloses a kind of preparation methods of vacuum induction smelting CuCrNb alloy material, the component of the CuCrNb alloy includes 0.8%~3.4%Cr, 0.7%~3.0%Nb and the balance is Cu by mass percentage;The preparation method comprises the following steps: S1, take oxygen-free copper rod, intermediate alloy Cr and Nb;S2, oxygen-free copper rod is placed in crucible into smelting furnace, pouring mold is also placed into smelting furnace, intermediate alloy is placed into the second charging box of smelting furnace;S3, vacuum is extracted from smelting furnace in turn with mechanical pump and Roots pump;S4, first smelt oxygen-free copper rod in crucible, then add intermediate alloy into crucible;S5, alloy liquid refined in crucible is poured into mold;S6, mold is removed after cooling and then demoulding.The CuCrNb alloy material prepared by the application has extremely small component deviation and more uniform metallographic structure;Compared with the traditional aluminothermic method, the preparation success rate is greatly improved, and the preparation process is shortened and the production efficiency is improved.

This invention discloses a stepwise thermal control method for improving the process and performance of laser additive manufacturing of nickel-based superalloys. It is based on a dual-laser additive manufacturing process, which includes a first laser and a second laser beam. During the printing process, for each printed layer, the first laser beam is first applied at 20 J / mm². 3 -40 J / mm 3 A low-energy-density laser preheats and partially melts the alloy powder layer on the substrate to optimize its adhesion and improve its stability. A second laser beam at 70 J / mm² is then used. 3 -110 J / mm 3 The high unit volume laser energy density completely melts the alloy powder layer; the alloy powder layer uses nickel-based high-temperature alloy powder. Therefore, this invention can suppress the burn-off of key elements (such as Al, Cr, Nb, etc.) in the alloy powder layer during the melting stage, achieving precise control of component composition and improving surface quality and dimensional accuracy.

This utility model discloses a smelting furnace that reduces aluminum shavings burn-off and achieves high and low level discharge. It includes a furnace body, a connecting body, and a drive mechanism. The connecting body is installed on the furnace body and has a lifting well, a mixing well, a first channel connecting the lifting well and the mixing well, a second channel connecting the first channel to the outside, a third channel connecting the lifting well to the outside, and a fourth channel connecting the mixing well to the outside. A fifth channel connects the lifting well to the inner cavity of the furnace body, and a sixth channel connects the mixing well to the inner cavity of the furnace body. In the direction from the top to the bottom of the furnace body, the second channel is located above the third and fourth channels. Part of the drive mechanism is housed within the lifting well, and the drive mechanism is used to transport the molten aluminum in the lifting well to the mixing well. This smelting furnace can reduce aluminum shavings burn-off, avoid excessive waste of aluminum shavings, save production costs, and achieve high and low level discharge by opening discharge channels or discharge ports at the same height position in the smelting furnace.