393results about How to "Dense tissue" patented technology

The invention relates to flour food, in particular to a minor cereal nutrient dried noodle produced by a double extrusion and secondary steaming combination method and a preparation method thereof. The invention is characterized in that the minor cereal nutrient dried noodle is prepared through the following steps: five cereals are taken as main raw materials, cucurbits, vegetables and potatoes are added or are not added, an auxiliary material capable of improving and enhancing the quality of a product and a complex quality improvement liquid are added, and processes such as raw material pretreatment, mixing and stirring, noodle-making molding by the double extrusion and secondary steaming combination method, drying, cutting, packing and so on, are performed. The reasonable formula design and the noodle-making molding process by the double extrusion and secondary steaming combination method, namely a process of steaming and cooking once again after two-stage extrusion molding, assure the balanced nutrition and the strong health care function of the product, and the minor cereal nutrient dried noodle has the advantages of long storage period, steady quality, no turbid soup during the cooking, boiling fastness, good thermal stability, smooth appearance, and chewy taste, and can be eaten as staple food like ordinary dried noodles.

The invention relates to a laser-cladded composite wear-resisting layer on the surfaces of copper and copper alloys and a preparation method. The composite wearing layer is a multi-layered laser cladding layer comprising at least two or more than two layers, wherein the coating connected with a substrate is the first layer, which is also called as a transition layer and is a copper-based alloy prepared from the following components in percentage by weight: 20.0-30.0 percent of Cu, 6.0-8.0 percent of Al, 0.3-0.6 percent of Si, 1.7-2.4 percent of Zr and the balance of Ni; and the rest layer is a cobalt-based alloy prepared from the following components in percentage by weight: 1.0-1.5 percent of C, 25-30 percent of Cr, 2-4 percent of Fe, 10-15 percent of W, 0.8-1.2 percent of Si, 3-4 percent of B, 8-12 percent of Ti, 10-12 percent of Ni and the balance of Co. The composite wear-resisting layer provided by the invention has compact tissues without cracks or pores and forms favorable metallurgy combination with the surfaces of copper and copper alloys. The preparation method provided by the invention can be used for accurately controlling the thickness of the composite wear-resisting layer and automatically controlling the whole process, and has the advantages of low energy consumption, no pollution, high efficiency and low cost.

The invention belongs to the field of material surface engineering and more particularly relates to a method for carrying out cladding on a high-hardness wear-resistant anti-corrosion nickel-based alloy material on a metal substrate E in a large area by applying a laser cladding technology, solving the problem of cracks generated in the laser cladding process of the high-hardness wear-resistant nickel-based alloy, in particular the cladding defects, such as cracks with the thickness of more than 1mm, pores and the like during large-area cladding. According to the invention, the high-hardness nickel-based alloy powder material is cladded on the surface of the metal substrate in the large area to form a high-hardness wear-resistant anti-corrosion nickel-based alloy coating by applying the laser cladding technology and adopting a scientific and reasonable process method. According to the method disclosed by the invention, stability and consistency of laser cladding are foundationally ensured, defects, such as cracks, pores, impurities can be prevented from generating, heat affected regions of the substrate are reduced, dilution rate is reduced, the high-wear-resistance anticorrosion nickel-based alloy coating with firm metallurgical bonding and fine and compact grains is obtained and has the hardness reaching 58-63HRC, and the service life of the processed workpiece can be prolonged by more than 1-2 times.

The invention discloses aluminum alloy and an aluminum alloy extruded profile machining method. The aluminum alloy comprises, by weight, 0.6-1.4% of Si, 0.7-1.3% of Mg, 0.1-1% of Cu, 0.1-1% of Mn, 0.01-0.15% of Ti, 0-0.2% of Zr, 0-0.5% of Cr, 0-0.4% of Fe, 0-0.25% of Zn and the balance Al. The aluminum alloy also meets the requirements that the weight percentage range of Mg+Si+Cu is 1.4-3.7%, themole ratio of Mg to Si is 0.7-1.5, and the weight percentage range of Mn+Cr+Zr is 0.1-1.5%. The machining method comprises the steps that (1) a cast ingot of the alloy is subjected to homogenization treatment; (2) the cast ingot is extruded into aluminum profile; (3) extrusion production is conducted; (4) on-line quenching is conducted; (5) tension leveling is conducted; and (6) artificial aging is adopted. According to the aluminum alloy and the aluminum alloy extruded profile machining method, the technology is simple, and the production cost is low.

The invention provides a method for laser-melting and fast forming of a choosing area of a medical implant moulage, which refers to measuring an organ of a patient to obtain the original data for a medical implant; three-dimensional CAD software is adopted to transform the original data into a three-dimensional CAD model for secondary processing and then for slicing processing so as to obtain a multi-layer-slice two-dimensional CAD data model of the medical implant; scanning path planning is carried out to the two-dimensional CAD data model of each slice to obtain scanning path data which is guided into a host computer of a choosing area laser-melting and fast forming device, and a layer-to-layer fast scanning method is adopted to carry out the choosing area laser-melting and fast forming to paraffin powder so as to prepare and obtain the medical implant moulage; the medical implant moulage is taken out to clear redundant paraffin power on the surface. The slicing processing of the invention does not relate to STL format data; the formed moulage has dense tissue, thus no more processing is needed after infiltration of the paraffin, small scale forming equipment can be realized, equipment producing cost can be reduced and forming time is shortened.

The invention discloses a method for preparing nano composite material by supercritical fluid electroforming, which comprises the following steps of: (1) adding metal salt solution, nano granules and composite additive into a reactor of an electroforming device, stirring uniformly, introducing carbon dioxide gas, and stirring at the temperature of between 35 and 50 DEG C under the pressure of 8 to 20MPa to generate supercritical fluid electroforming solution containing the nano granules; (2) setting pulse interval at 1 to 5 microseconds, setting the pulse width at 10 to 30 microseconds, setting the current density at 1 to 3A/dm<2>, switching on a direct-current power supply, and making the metal ions and the nano granules in the metal salt solution deposited on a cathode template togetherto obtain a nano composite electroforming layer; and (3) after the deposition is completed, obtaining the nano composite material by corresponding treatment. The method can electroform the nano composite material electroforming layer with uniform nano granule dispersion, flat surface, compact tissue, fine crystal grain and excellent performance.

The invention discloses a forming method of a maraging steel mold adopting selective laser melting. A three-dimensional structure of the mold is designed firstly by using three-dimensional design software such as Solidworks, ProE and Ug; and then the three-dimensional mold is subjected to slicing layering and route planning treatment, data are guided into a selective laser melting device, reasonable technical parameters are set, and the mold with a complex cooling channel is formed at a time. The mold formed by the method has the advantages of being high in compactness, few in internal defect, high in forming efficiency and high in free degree on the follow-up forming cooling channel. According to the forming method of the maraging steel mold adopting selective laser melting, the production period of the mold is effectively shortened, forming efficiency is high, external disturbance is small, the compressive property and production efficiency of the mold are remarkably improved, and meanwhile manufacturing cost is greatly reduced. After the directly-formed mold is subjected to solution and aging treatment, hardness and strength of the mold are remarkably improved, and the using requirements of the mold are met.

The invention discloses an alloy ingot for an automotive hub and a production method thereof. The alloy ingot comprises the following components: 6.8-7.2% of Si, 0.28-033% of Mg, 0.10-0.15% of Ti, 0.015-0.030% of Sr, less than or equal to 0.10% of Fe, less than or equal to 0.05% of Mn, less than 0.01% of zinc, less than 0.01% of Cu, less than 0.003% of Ca, less than 0.002% of P, less than 0.02% of other single impurity content, less than 0.1% of total impurity content and the balance of aluminum. The production method of the alloy ingot for the automotive hub comprises the following steps of: adding 3303 industrial metallic silicon and electrolytic aluminum liquid for batching, heating at an appropriate temperature and melting, spreading a covering agent so as to reduce oxidation slagging, stirring so that the industrial metallic silicon rapidly melts, keeping uniform temperature, slagging off, keeping melt clean, spraying powder and refining by adopting high-purity N2 and a refined powder spraying agent, controlling the temperature of a smelting furnace to 740-750 DEG C, adding Al-Sr alloy to aluminium water, carrying out secondary degassing and slagging-off by adopting a powder spraying refinement method, filtering to remove slag, and casting the alloy ingot in line with requirements. The alloy ingot obtained by the method has the advantages of stable and uniform components, compact structure and clean surface; and the production method is the best production method for producing the A356.2 alloy ingot for the low-iron high-end automotive hub.

The invention relates to a method for manufacturing metal-based composite materials by the aid of 3D (three-dimensional) printing space structures, and belongs to the technical field of metal-based composite materials. The method includes building stereoscopic models of the space structures by the aid of graphics software and printing the stereoscopic models by the aid of 3D printing machines to obtain plastic templates of the space structures; preparing slurry from ceramic particles and adhesion agents, and filling space structure gaps of the plastic templates with the slurry; drying and gradually heating the plastic templates, removing plastics, and sintering the templates to obtain ceramic particle prefabricated blanks with certain strength and complex space structures; manufacturing the metal-based composite materials by the aid of pressure impregnation technologies such as vacuum suction casting and squeezing casting technologies. The method has the advantages that the composite materials which can be accurately controlled, are varied within large ranges and have the complex space structures can be manufactured by the aid of the method, processes are simple, and mechanical and automatic batch production can be facilitated.

Belonging to the technical field of alloy steel preparation processes, the invention relates to an ultrahigh thermal conductivity wear-resistant hot stamping die steel and a manufacturing method thereof. Current hot stamping die steel on the market is mainly various improved H13, H11 and other high alloy hot work die steel. The steel provided by the invention comprises the following components by mass percent: 0.33-0.40% of C; less than 0.30% of Si; less than 0.30% of Mn; 1.0-2.0% of W; 4.0-5.0% of Mo; less than 0.30% of Cr; 0.10-0.20% of V; and the balance Fe and inevitable impurities. And in the impurity elements, S is smaller than or equal to 0.01%; P is smaller than or equal to 0.01%; and O is smaller than or equal to 30ppm. The steel is characterized in that: simple C, Mo and W are adopted as the main elements to coordinate the ratio of carbides; low Mn, low Cr and low Si content are maintained; after electric furnace smelting, electroslag remelting, annealing, high temperature homogenization, forging and annealing, the material has good machining properties; and after heat treatment, the material has excellent impact toughness, tempering stability and thermal fatigue performance. With ultrahigh thermal conductivity, the steel can be more suitable for hot stamping.

A production method of a magnesium alloy hub is characterized by including the steps of first, smelting; second, squeeze-casting; third, homogenizing; fourth, forging; fifth, thermal treatment; and sixth, subsequent treatment. Compared with the prior art, the production method has the advantages that the production method combines advantages of magnesium alloy hub production by casting and forging, and the magnesium alloy hub is made by squeeze-casting and forging according to the features of squeeze casting technology; the magnesium alloy hub is imparted with excellent comprehensive performance, the production process is simple, and the production cost is low.

The invention discloses a method for preparing hypereutectic high chromium white cast iron. According to the method, steel scrap, pig iron, high carbon ferro-chrome, ferromanganese and ferrosilicon are taken as smelting raw materials. The method comprises the following steps of: preparing the following chemical compositions in percentage by weight: 3.0 to 4.5 percent of C, 15 to 35 percent of Cr, 0.5 to 1.5 percent of Mn, 0.5 to 1.5 percent of Si, less than 0.06 percent of P, less than 0.06 percent of S and the balance of Fe; melting the raw materials in an electric furnace, deoxidizing, quickly pouring a casting fluid in the furnace into a casting ladle; when the temperature is reduced to 1,300-1,350DEG C, pouring the casting fluid into a sand mould for forming; heating a cast in the electric furnace to the temperature of between 700 and 1,000DEG C, keeping the temperature, quickly taking out of the furnace, and forging on a forging machine for forging deformation treatment; and tempering the forged piece to obtain the hypereutectic high chromium cast iron.

The invention relates to a method for manufacturing a wear resistant composite roll, which belongs to the technical field of steel rolling. The most difficult problems in the technology transfer of the prior combined composite roll are the improvement on the processability of an outer-layer roll sleeve and the improvement on the processing efficiency. The method comprises the following steps: opening a groove on the outer surface of a roll collar inner sleeve, washing the roll collar inner sleeve by using diluted hydrochloric acid and alcohol, then painting borax on the surface of the roll collar inner sleeve and in the groove, and air-drying the roll collar inner sleeve and placing the roll collar inner sleeve in a casting mould; pouring outer layer wear resistant molten metal through a bottom pouring method to obtain an imbedded composite roll sleeve; and combining the imbedded composite roll sleeve with a cast steel or forged steel rolling shaft through splines and integrating the imbedded composite roll sleeve and the cast steel or forged steel rolling shaft through interference fit so as to obtain the wear resistant composite roll. The composite roll has the advantages of high hardness for the outer surface layer, good wear resistance, high roll core strength, good tenacity, firm combinations between the roll sleeve and the roll core and between the roll sleeve outer surface layer and the roll collar inner sleeve and the like.

The invention discloses a method for manufacturing large cake forgings of high-carbon and high-chromium cold working die steel. The method is characterized by comprising the following steps of: obtaining Cr12MoV or Cr12Mo1V1 steel by adopting primary smelting with an electric furnace, ladle refining and vacuum degassing process smelting; pouring the tapped steel to form a 6 to 9t octangular ingot; conveying the octangular ingot to a press at the temperature of more than or equal to 300 DEG C, forging the octangular ingot to a blank with the diameter of 300 to 700 millimeters, removing surface defects by annealing, polishing or turning and local grinding, performing cold saw cutting on the end face and blanking to form a cake blank; and heating the cake blank to the temperature of between 1,150 and 1,190 DEG C, upsetting and forging the cake blank by using the press, annealing and turning, and thus obtaining the large cake forgings of the high-carbon and high-chromium cold working die steel. By adopting the method, the yield is improved to 40 to 60 percent; and the manufactured large cake forgings of the high-carbon and high-chromium cold working die steel can comprehensively meet the requirements of hardness, impact toughness and the like and ultrasonic flaw detection quality.

The invention provides a P91 seamless steel pipe and a method for manufacturing the P91 seamless steel pipe. The method comprises the following steps: smelting a blank: performing smelting, refining, vacuum degassing and round-blank continuous casting on raw materials to obtain the blank; annealing: performing high-temperature diffusion annealing and low-temperature isothermal annealing on the blank; rolling the blank periodically: heating the annealed blank uniformly, hot rolling, perforating, sizing and cooling; and carrying out thermal treatment: heating the blank rolled periodically to 1,040-1,080 DEG C, normalizing, preserving heat, cooling, heating to 750-800 DEG C, performing tempering, preserving heat and cooling to obtain the P91 seamless steel pipe. The content of P in the raw materials is less than or equal to 0.015%, and the content of S content is less than 0.007%. and the diameter phi of the seamless steel pipe is 325-720mm. The P91 seamless steel pipe manufactured by adopting the method is compact in internal structure and excellent in performance. The metal yielding rate and the steel pipe forming yield are improved, the production cost is reduced, and resources are saved.

The invention provides a method for casting aluminum piston with an insert ring and a cooling coil pipe, comprising steps as follows: (1) preparing aluminum alloy for piston; (2) melting; (3) mould setting of the cooling coil pipe; (4) mould casting of insert ring; (5) mould closing and pouring; (6) mould opening and heat treatment for taking out the casting, processing low temperature melting treatment and ageing heat treatment to obtain the piston blank; (7) post-treatment for carrying out mechanical processing and surface treatment on the piston blank to obtain the aluminum piston finished product. The invention also discloses a method for casting aluminum piston with an insert ring and a cooling coil pipe. Compared with the prior art, the advantages of the invention are as follows: the piston body has compact structure, and the combination between the wear resistant insert ring and the piston body through ultrasonic detection is good, and the position of the cooling coil pipe is precise and the anti-stretching intensity is high.

The invention discloses a manual argon-arc welding process of a tungsten electrode. According to the welding process, a porcelain mouth of an argon-arc welding torque is supported on a bevel for forming a fulcrum, and by adopting the steps of reasonably setting a gap and welding, a welder is easy to practice the amplitude, the frequency and the advance speed of a circular arc motion of the wrist till being skilled and can further uniformly control the retention time of an electric arc on the two sides of the bevel, uniformly control the length of the electric arc, uniformly control welding speed and effectively ensure linear energy input, so that the welding process has the advantages of aesthetic formed weld joint, uniform weld line, low heat input, compact tissue, stable quality of the weld joint and high quality of the weld joint on the inner pipe of a pipe.

The invention discloses a method for connecting ceramic and ceramic, and ceramic and metal. The method comprises the following steps of: 1) forming a compact aluminum or aluminum alloy thin film with thickness of several to tens of microns on a connecting surface of the ceramic to obtain the ceramic with the connecting surface covered by the aluminum or aluminum alloy thin film; and 2) connectingthe ceramic with the connecting surface covered by the aluminum or aluminum alloy thin film and the metal by using the aluminum or aluminum alloy thin film, or connecting the ceramic with the connecting surface covered by the aluminum or aluminum alloy thin film and the ceramic with the connecting surface covered by the aluminum or aluminum alloy thin film by using the aluminum or aluminum alloy thin film. Compared with the prior art, the method has the advantages that: oxide inclusion originated from an aluminum surface oxide film is not formed on the interface between the aluminum film and the ceramic, which is formed by the method, the ceramic is firmly connected with the ceramic or the metal and the ceramic and the metal do not fall off easily, and the separating and peeling strength between the thin film and a ceramic chessboard is greater than or equal to 4.1N/cm. After an aluminum brazing process or an aluminum or aluminum alloy workpiece connection are adopted, defects of the connecting interface of the aluminum or aluminum alloy workpiece and the ceramic are avoided, the 90-degree tear strength of the connection can reach over 12kg/cm, fracture does not occur on the interface, and the ceramic and metal are connected very firmly.

The present invention discloses one kind of refractory material for desulfurizing spray gun, and the refractory material has the main raw materials including electrocast mullite, andalusite, alundum powder, fine alpha-Al2O3 powder, fine SiO2 powder, kyanite, steel fiber, 95# flake graphite, cement and fine spinelle powder. The refractory material is cast to desulfurizing spray gun vertically in two sections, one slag line section and one non-slag line section. The spray gun thus produced has high heat stability, low reburning shrinkage, high mechanical strength, excellent wear resistance, compact structure, low ferric oxide content, great high temperature strength and long service life.

The invention provides a gradient composite material steel rail turnout coating prepared by laser cladding. The composite material is characterized in that a transition layer adopts a Fe-based alloy material, wherein the Fe-based alloy material comprises the following components of, in percentage by weight, 13wt%-17wt% of Cr, 3wt%-6wt% of Ni, 1wt%-1.5wt% of Si, 0.5wt%-1wt% of Mn, 0.3wt%-1.2wt% ofNb, 1wt%-1.5wt% of B, 0.05wt%-0.7wt% of C, 0.5wt%-1.2wt% of V, and the balance Fe; a strengthening layer is arranged above the transition layer, and the strengthening layer adopts a Fe-based metal nano-phase composite material. The preparation method comprises the following steps of preparing the Fe-based metal powder and the Fe-based metal nano-phase composite material coating; preheating a steelrail by using laser scanning heating so as to reduce the temperature gradient; preparing the gradient composite material coating on the surface of the steel rail by utilizing a laser cladding technology, and performing laser scanning heat treatment; and reducing the cooling rate after laser cladding, so that the martensite of the heat affected zone is prevented from being generated, and the cracking property of the coating is reduced. The prepared steel rail frog has the advantages that the hardness curve is smooth, the overall toughness and bearing performance are good, the strength and hardness is higher than a common heavy-load railway frog, the service life is longer, and manufacturing integration is relatively strong.

A method for producing a large magnesium alloy ring by means of centrifugal casting includes: preheating a mould; hanging thermal insulation coatings and determining centrifugal casting parameters; performing centrifugal casting and the like. The method is technically characterized by determination of rotation speed and casting speed. A centrifugal power device is started for centrifugal casting, the centrifugal rotation speed n is calculated according to the gravity coefficient formula as shown in the original text, n=29.9, wherein n refers to the centrifugal rotation speed, R refers to the radius (m) of the inner surface of a casting, and G refers to gravity coefficient. The method overcomes the shortcomings of an existing large magnesium alloy ring production process, is used for producing the large magnesium alloy ring with compact texture and high tensile strength, and has an important significance for magnesium alloy application and development of magnesium alloy centrifugal casting technology.

The invention discloses a hard soldering method of high volume fraction SiC particle-reinforced Al matrix composite and a kovar alloy dissimilar material, relating to a hard soldering method of a dissimilar material. The invention solves the problem that welding cost is high because the existing hard soldering of the dissimilar material needs metalizing treatment. The method of the invention comprises the following steps: after cleaning master batches and foil-shaped brazing filler metal, putting the foil-shaped brazing filler metal between the master batches, and then putting into a vacuum furnace for soldering to finish hard soldering of the master batches. The method of the invention obtains soldering seams with compact issue and forms firm metallurgical bonding. The invention does not need to carry out metallization processing on the master batch, thus lowering welding cost.

The invention discloses a differential pressure casting machine and a casting method. The differential pressure casting machine comprises a base seat plate, wherein a fixing die plate mechanism is arranged on the upper end face of the base seat plate, a lower die and a lower die cover are arranged in the middle of the upper end face of the base seat plate, the lower die cover wraps the outer side of the lower die, an upper die and an upper die cover are respectively arranged on corresponding positions right above the lower die and the lower die cover, the upper die cover wraps the outer side of the upper die, the upper die and the upper die cover are connected with a moving die mechanism through a moving die plate, the moving die mechanism is connected with the fixing die plate mechanism and moves up and down along the fixing die plate mechanism, a heat preserving furnace is arranged below the base seat plate, a heat preserving furnace driving mechanism is arranged in the heat preserving furnace, the heat preserving furnace driving mechanism is connected with the base seat plate through a support, and a liquid rising tube is located below the base seat plate and connected with the heat preserving furnace. The differential pressure casting machine can obtain the best die filling speed, can obtain the best filling metal liquid, can prevent entering of outer slag inclusion, and can obtain castings which are compact in texture, few in casting defect and excellent in performance.

The invention provides laser cladding alloy powder enhanced with oxide particles and a preparation method thereof. The laser cladding alloy powder enhanced with the oxide particles is characterized in that the laser cladding alloy powder enhanced with the oxide particles consists of a matrix alloy powder, the oxide particles and a binder, wherein the proportion is 50-98% of the matrix alloy powder, 1-45% of WC or TiC or a mixture powder of WC and TiC and 1-45% of a combined mixture powder of more than two or one of Al2O3, Cr3C2 and ZrO2. The preparation technological steps of the laser cladding alloy powder enhanced with the oxide particles are preparing the matrix alloy powder, adding the oxide particles, adding the binder, stirring and ball-milling, combining the powder, drying, crushing and sieving. The laser cladding alloy powder enhanced with the oxide particles provided by the invention not only has higher hardness and flexibility, but also has excellent abrasion resistance and corrosion resistance, thereby being quite applicable for the laser cladding of parts under the working conditions of high impact and high abrasion resistance; and moreover, the segregation generated due to great disparity between the proportions of all components can be effectively prevented during the storage, transportation and use processes.

The present invention discloses continuous casting former for hollow section of low plasticity metal. The continuous casting former includes one heat insulating intermediate frequency furnace, one furnace cover, one crucible, one pouring pipe, one pouring cup, one riser tube penetrating the furnace cover and inserted into the crucible, and one crystallizer opposite to the upper end of the riser tube for the melt to be led upwards into the graphite muff of the crystallizer. The furnace cover and the crucible have their melt surfaces constituting one sealed cavity. During continuously casting, the melt entering to the crystallizer vertically along the riser tube is solidified to form the pipe shell, and the pipe with shell reaching the required thickness is drawn out of the crystallizer continuously by the traction machine. The liquid surface inside the crystallizer is maintained in a constant height, and the present invention makes it possible to produce small diameter and thin wall cast pipe.

The invention discloses a forging process for an engine crankshaft of an excavator, belonging to the forging molding technical field of a mechanical engine crankshaft for a large building. The invention successively comprises the process steps of selecting materials, blanking, heating, cleaning, compression-bending, finish forging, hot trimming and testing. The invention is characterized in that using a double chamber ejector furnace to heat billets, placing the heated billets on a beating oxide scale machine to clean the oxide scales on the surfaces of the billets, placing the cleaned billets in a forging hammer mould for compression-bending and finish forging, placing the forgings on a trimming die for hot trimming and at last testing whether the product is qualified. The invention has the advantages that the produced crankshaft forging has tight tissue, good metal streamline, high tensile strength, fatigue strength and hardenability, small deformation when strengthening treatment is carried out, high creep strength at high temperature and high qualified rate of the product, and the produced crankshaft forging can achieve mass production.

The invention discloses a novel method for making a savory sauce duck. The method comprises the steps of adopting a duck with a lean meat rate of more than 70% and a breast meat rate of 23.5-24.5% and materials, such as white granulated sugar, soy sauce, salt, anise and the like and injecting, tumbling, pickling, air-drying and drying in turn to obtain the savory sauce duck. The sauce duck produced by using the novel making method disclosed by the invention has the characteristics of purplish red color, rich sauce taste, sweet, spicy and refreshing taste, compact structure and the like because the sauce duck has a unique production process, and avoids the occurrences of instable salinity and color and divergent mouthfeel and structure, caused by the traditional sauce stewing.

The invention relates to high-sphericity Inconel 625 alloy powder and a preparation method and application thereof. According to the method, vacuum smelting technology is adopted, the Si content is controlled to improve the sphericity of Inconel 625 alloy powder particles, an ultrasonic vibration and airflow classification method is applied for matching the powder of different particle sizes, and the Inconel 625 alloy powder applicable to different metal 3D printing technologies is obtained through preparation. Compared with the prior art, the obtained Inconel 625 alloy powder has the beneficial effects of being uniform in component, low in impurity content, high in sphericity degree, optimized in particle size distribution and the like, the requirement of different metal 3D printing technologies for the Inconel 625 alloy powder material is met, and the application field of the metal material increasing manufacturing is expanded.

The invention discloses a method for preparing a wear-resistance toughening coating layer on a surface of high-manganese steel. The method is characterized by comprising the steps of: (S1) pretreatment of a basal body before cladding, (S2) pretreatment of powder before cladding, (S3) cladding, and (S4) heat treatment after cladding. A plasma cladding technology, solid solution treatment and a coating layer surface aging process are adopted to prepare the Fe-Ni base alloy coating layer with high hardness, high wear resistance and high impact toughness; the surface hardness and the wear resistance of the basal body material are improved; the problem of easy cracking of a traditional hard particle reinforcing metal base wear-resistance coating layer under such conditions as medium and high stress is solved; and the prepared coating layer is excellent in metallurgical bonding with the basal body material, so that the comprehensive performance of the coating layer is greatly improved, the basal body material is protected more sufficiently, the service life of the basal body material is prolonged, and the application prospect is broad.

The invention discloses a high-precision aluminum alloy rectangular tube forming method which comprises the following steps: a) heating the prepared No.6061 aluminum alloy ingot over uniform fire to 415+/-5 DEG C, and keeping for 1-2 hours; b) performing hot extrusion on an extrusion shunting mould with a preheating temperature of 400 DEG C to obtain an initial tube blank; c) performing annealingtreatment in salt bath; d) performing cold rolling on the tube blank obtained in the step c) to obtain a round tube; e) soaking the round tube obtained in the step d) in a 38# cylinder oil for 24 hours; f) performing non-mandrel drawing on the tube blank obtained in the step e) to obtain an approximately rectangular tube; g) performing mandrel drawing on the approximately rectangular tube obtained in the step f) through a rectangular correction mould to obtain a rectangular tube; and h) performing mandrel drawing of the rectangular tube obtained in the step g) to obtain the finished tube. Through the invention, the size precision and surface quality of the finished tube are improved, the problems that the tube blank is drawn apart in the drawing process and obvious transverse cracks appear at the corner are solved, and the operational performance and service life of the product are remarkably improved.