37results about How to "Reduce burning loss" patented technology

The invention relates to an additive manufacturing high-temperature-bearing nickel-based superalloy and a preparation method thereof, and relates to the technical field of superalloy materials and additive manufacturing. According to the main technical scheme, the preparation method of the high-temperature-bearing nickel-based superalloy for additive manufacturing comprises the following steps: preparing alloy powder: preparing the alloy powder; wherein the alloy powder comprises the following chemical components in percentage by weight: 17.0 to 21.0 weight percent of Cr, 50 to 55 weight percent of Ni, 5.0 to 5.5 weight percent of Nb, 2.8 to 3.3 weight percent of Mo, 0.75 to 1.15 weight percent of Ti, 0.3 to 0.7 weight percent of Al, 0.2 to 0.5 weight percent of C, 0.1 to 0.3 weight percent of Mn, 0.1 to 0.3 weight percent of Si, less than or equal to 0.015 weight percent of S, less than or equal to 0.02 weight percent of O, 0.01 to 1.0 weight percent of Y and the balance of Fe; and the additive manufacturing step is conducted, specifically, the alloy powder with the set particle size range is screened out from the alloy powder to be subjected to additive manufacturing treatment, and the additive manufacturing high-temperature-bearing nickel-based high-temperature alloy is obtained. The method is mainly used for preparing the in-situ oxide dispersion strengthened additive manufacturing high-temperature-bearing nickel-based high-temperature alloy with excellent high-temperature performance.

The invention relates to a flexible production method of low-alloy and high-strength steel with yield strength of 355 / 390 MPa. The steel comprises the following chemical components: 0.13-0.18% of C; 0.20% to 0.35% of Si; 0.8% to 1.10% of Mn; p is less than or equal to 0.02%; s < = 0.005%; 0.005% to 0.01% of Nb; 0.01%-0.03% of Als; the balance of Fe and impurities; the production process comprises the steps of converter smelting, LF refining, continuous casting, heating, rolling, controlled cooling after rolling and straightening. Through the coupling design of smelting, continuous casting, low-temperature heating, low-temperature rolling and controlled cooling processes, the comprehensive effect of fine grain strengthening, precipitation strengthening and phase change strengthening of a high-quality continuous casting blank during low-temperature rolling is fully utilized, and flexible and efficient production of steel plates with the yield strength of 355MPa and 390MPa is achieved.

The invention relates to the technical field of alloy smelting, in particular to a smelting and die-casting process of a high-toughness die-casting aluminum-silicon alloy and the high-toughness die-casting aluminum-silicon alloy. The smelting and die-casting technology of the high-toughness die-casting aluminum-silicon alloy comprises the following steps that preparation is conducted before smelting; smelting process control; refining and purifying; testing and adjusting components; and die-casting. Wherein the smelting comprises the following steps: firstly adding pure Al, pure Zn and AlSi20, heating and melting, then heating, adding AlMn10, AlCu10, AlTi10 and Al5V, melting, stirring, cooling, adding pure Mg, melting and stirring; raising the temperature, adding a refining agent, turning and stirring, and slagging off; and finally, adding AlSr10, AlLa30 and AlCe10, melting, and stirring. According to the method, by means of segmented feeding and smelting at different temperatures and die-casting process parameter control, the problem that the mechanical property of the high-toughness die-casting aluminum-silicon alloy cannot be exerted due to inaccurate component control in the smelting process and non-ideal cooling speed in the die-casting process is solved, and the prepared aluminum-silicon alloy has excellent comprehensive performance.

The present invention proposes a method for producing rare earth ferrosilicon alloy using rare earth slag, which belongs to the technical field of preparing rare earth alloys by pyrometallurgy. Compared with preparing rare earth ferrosilicon alloy using rich rare earth slag as raw material, the method uses rare earth tailings and samarium reduction slag after ore dressing as raw materials, adopts carbon thermal method to smelt rare earth ferrosilicon alloy in electric arc furnace, and comprises the steps of: (1) roasting the tailings, adding coke powder and charcoal powder to grind into mixed powder, adding binder to the mixed powder, adding water to mix and make balls, and drying; (2) adding silica, carbon reducing agent, steel scraps and pellets into electric arc furnace for smelting reduction; (3) pouring the charge out of the furnace to obtain the product rare earth ferrosilicon alloy and harmless glassy tailings. The method of the present invention produces rare earth ferrosilicon alloy and produces harmless glassy tailings, so that tailings resources can be used at a high value and environmental pressure can be reduced.

The utility model relates to metal material heat treatment equipment technical field discloses an electromagnetic induction type tungsten wire heating furnace, including support, heating assembly and high frequency induction heater, heating assembly contains the shell fixed on the support, the inner bag of being placed in the shell inside and the top cover of sealed connection, the inner bag inside is penetrated with tungsten tube, the shell inside is installed with the solenoid around tungsten tube, the shell rear side communicates the air inlet, the tungsten tube wall sets up the air vent, the shell and the inner bag between constitute water -cooling circulation cavity and are equipped with the water inlet and outlet, the top cover is equipped with the pagoda head and the explosion -proof mouth of communicating cavity, the shell is equipped with the observation window and pressure transmitter. The utility model constructs argon -rich protection environment through gas flow guide structure to prevent tungsten wire oxidation, utilizes water cooling cooperation explosion -proof window to ensure equipment heat dissipation and pressure -relief safety, combines cowhide pressure block and restraines the shaking, to realize the efficient, uniform and safe and stable continuous heat treatment of tungsten wire.

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.

The invention discloses Q460D-grade low-temperature-resistant angle steel and a production method thereof. The Q460D-grade low-temperature-resistant angle steel comprises the following chemical components in percentage by weight: 0.17%-0.20% of C, 0.30%-0.40% of Si, 1.40%-1.55% of Mn, 0.070%-0.080% of V, less than or equal to 0.020% of P, less than or equal to 0.020% of S, 0.0050%-0.0200% of Als, 0.42%-0.46% of CEV, 0.0120%-0.0150% of N and the balance of Fe and inevitable impurities. The production method comprises the steps of KR pretreatment, converter smelting, LF refining, continuous casting, heating and profile steel rolling. The impact property of the Q460D-grade angle steel at-20 DEG C is larger than or equal to 34 J, the upper yield strength ReH is larger than or equal to 470 MPa, the tensile strength Rm is larger than or equal to 630 MPa and smaller than or equal to 680 MPa, and the percentage elongation after fracture A is larger than or equal to 22%.

The invention provides a micron-sized rare earth cerium additive modified 1000MPa-grade high-strength steel submerged-arc welding flux as well as a preparation method and application thereof, and belongs to the technical field of flux preparation. The invention solves the problems of low low-temperature toughness, high crack generation tendency, burning loss of alloy elements and the like of the existing 1000MPa-grade high-strength steel submerged-arc welding deposited metal. The rare earth cerium additive is introduced into the welding flux, the additive can improve the fluidity of the welding flux so as to improve the welding quality, meanwhile, micron-sized rare earth cerium has the effects of refining grains and modifying inclusions, and the micron-sized rare earth cerium is matched with other components in the welding flux so that the strength of deposited metal can be enhanced, and the low-temperature impact toughness of the deposited metal can be improved. The flux can be used for welding 1000MPa-grade high-strength steel under the working conditions that the online energy is greater than 30kJ / cm and the thickness of a base metal plate is greater than 80mm, the mechanical property of deposited metal after welding is excellent, the construction cost of the high-strength steel for water-power engineering can be reduced, and the flux has remarkable economic benefits and social benefits.

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 invention discloses a laser-assisted MAG high-speed welding process for galvanized sheet, which uses galvanized sheet as base material, carbon steel argon arc welding material as welding wire, selects laser-assisted MAG arc as composite heat source, and adopts a paraxial composite method of laser in front and MAG arc in the back for welding. The laser-assisted MAG high-speed welding process for galvanized sheet of the invention can ensure high-speed welding of automotive galvanized sheet while avoiding the phenomenon of galvanized layer being damaged and galvanized layer being burned, and can avoid weld defects such as humps caused by excessively high welding speed when conventional automotive galvanized sheet is welded.

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.

The invention relates to the technical field of dry quenching, and discloses a burning loss-reducing dry quenching supercritical CO2 power generation co-production steam system, which comprises a dry quenching furnace, a steam pocket and a supercritical CO2 boiler, a primary dust remover is arranged at a circulating gas output port of the dry quenching furnace, coke powder in circulating gas is recovered by the primary dust remover, and the coke powder in the circulating gas is recovered by the supercritical CO2 boiler. Circulating gas sequentially passes through an incinerator, a second-stage superheater and a first-stage superheater, and then enters the supercritical CO2 boiler through a flue; according to the burning loss reducing dry quenching supercritical CO2 power generation co-production steam system, the incinerator is arranged at the rear end of the primary dust remover, circulating gas is not incinerated in the annular channel in the dry quenching furnace, coke powder in the circulating gas can be recycled through the primary dust remover, the content of the coke powder in the circulating gas is reduced, and the burning loss reducing effect is achieved. The burning loss of the coke powder can be reduced, and meanwhile, the temperature of the circulating gas is prevented from greatly rising.

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 invention relates to the technical field of nonferrous metal combustion, in particular to a control method of a diffuse combustion system of an aluminum melting furnace, which comprises the following steps: adjusting the mounting position of a burner; adjusting the initial opening position of the front valve of the natural gas nozzle; adjusting the flame shape and length of the burning torch of the burner of the aluminum melting furnace for multiple times; switching of flame modes and the proportion of primary air and secondary air are controlled; the air-fuel ratio and the residual oxygen amount of furnace gas are accurately controlled; the continuous flameout purging time of the main flame gun and the time when flames are not detected after the natural gas nozzle front valve is opened are adjusted, and the action of the nozzle front valve is controlled; adjusting the fan frequency of the dust removal system; before ignition, if the auxiliary smoke brake is in a closed state, the main fire gun needs to be opened for 3 seconds; a wild air valve is additionally arranged on a smoke exhaust fan pipeline; a ton gas consumption and burner interlocking function is set; a ton gas consumption target value is set; and when the actual ton gas consumption reaches the target value, the burner stops fire and reminds an operator that melting is completed. According to the method, the product gas consumption of the circular economy smelting furnace is reduced, and the metal burning loss is reduced.

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 application belongs to the technical field of copper alloy material, and discloses a lead bronze alloy for super-low temperature, a preparation method thereof and an ultra-low temperature heavy load shaft sleeve, the alloy comprises, in percentage by weight, Sn 9.0%-11.0%, Pb 8.0%-11.0%, Ni 1.0%-2.5%, rare earth elements 0.05%-0.5%, and the balance of Cu and inevitable impurities. Through nickel micro-alloying, rare earth treatment and lead sulfur frying pretreatment, the problems of low-temperature embrittlement, lead segregation and grain coarsening of the traditional lead bronze are solved. The application also provides an optimized preparation process of the alloy, and an ultra-low temperature heavy load shaft sleeve suitable for the joint bearing position of a large mining electric shovel type excavator manufactured by using the alloy.

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.

The invention discloses a large-size aluminum alloy thin-wall hollow round cast ingot and a production method thereof, belongs to the technical field of aluminum alloy casting, and aims to solve the problem that the thin-wall hollow round cast ingot lacks related production processes which are mature in technology and controllable in cost. The method comprises the steps of burdening; and smelting, refining and casting. High-temperature raw aluminum liquid produced by the aluminum electrolysis cell is directly utilized, large-specification aluminum alloy hollow and solid round cast ingots are produced, meanwhile, the production line can also produce aluminum alloy flat cast ingots and aluminum alloy round cast ingots in a compatible mode, product types can be increased for enterprises, economic benefits can be improved, and energy conservation and consumption reduction can be achieved.

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 invention belongs to the technical field of composite material preparation, and particularly relates to a graphene aluminum-based composite material and a preparation method thereof. In order to solve the problems that when a graphene aluminum-based composite material is prepared through an existing method, mixing is prone to being uneven, graphene is prone to being burnt to form an aluminum-carbon phase, and the comprehensive performance needs to be improved, the preparation method of the graphene aluminum-based composite material is provided and comprises the following steps that a, graphene sheets and aluminum powder are weighed, and the graphene sheets are added into an isopropanol solution to be pretreated; adding polydimethylsiloxane into the aluminum powder to obtain flaky aluminum powder; b, the pretreated graphene, aluminum powder and a dispersing agent are jointly added into a conical mixing machine to be mixed, exhaust and cold isostatic pressing are conducted, then sintering is conducted, extrusion molding is conducted, and a graphene aluminum base material is obtained; and c, adding the graphene aluminum base material into pure aluminum water according to a certain proportion, fully stirring, cooling, extruding, and performing stress relief annealing to obtain the graphene aluminum-based composite material. The method can protect graphene, reduce defects, save energy and time, and is suitable for industrial production.

The invention discloses a method for preparing an efficient and corrosion-resistant 18K purple gold aluminum alloy. Step 1: prepare the following raw materials by mass ratio: 75-83 parts of gold, 23-24.5 parts of aluminum, 0.5-2 parts of rare earth, and 0.5-2 parts of tantalum or niobium; Step 2: first mix gold and part of aluminum and put them into a vacuum medium frequency induction furnace, prepare the gold aluminum alloy and take it out, then mix the rare earth and the remaining aluminum and put them into a vacuum medium frequency induction furnace, prepare the aluminum-based rare earth alloy and take it out; grind the gold aluminum alloy and the aluminum-based rare earth alloy into powder together; Step 3: stir the alloy powder evenly and compact it into a cake, melt it under argon protection, and grind it for fine polishing; Step 4: ion-implant tantalum or niobium on the surface of AuAl2, and then anneal and diffuse it under argon protection; Step 5: prepare an anodizing electrolyte; Step 6: perform an anodizing treatment. It can not only ensure the color quality of the 18K purple gold aluminum alloy, but also obtain a dense composite oxide film to improve corrosion resistance.

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.