51results about How to "Combined with good quality" patented technology

The invention discloses a system and a method suitable for quality control in an inverse solidification process. The system mainly comprises a data acquisition module, a visualized display module, and an adaptive expert system, wherein the adaptive expert system comprises a defect diagnostic reasoning module, a processing parameter reasoning module, an adaptive rule base correcting module, and a knowledge base. The processing parameter reasoning module reasons and provides optimized processing parameters before production, the data acquisition module and the visualized display module carry out data acquisition and visualized animation display on a detected production process, the defect diagnostic reasoning module analyzes performance and defects of products, and the adaptive rule base correcting module extracts defect analysis result of the products and the processing parameters re-correct rule to be fed back and applied to the processing parameter reasoning module so as to carry out a new production process. The system and the method can remarkably improve combination quality of a motherboard solidification layer in the inverse solidification process, accumulate processing experience, reduce defect, and save experiment expense.

The invention relates to a device and a method for preparing a bimetallic compounding roll by an electric slag remelting method. The device comprises an upper crystallizer and a lower water-cooling crystallizer, wherein the upper crystallizer and the lower water-cooling crystallizer form a T-shaped crystallizer; the upper crystallizer is a conductive crystallizer, and is insulated and isolated from the lower water-cooling crystallizer, and the lower water-cooling crystallizer is provided with a liquid level detector; a remelting compounding transformer is connected with the upper crystallizerthrough a short electrified wire. The method comprises the following steps of after slagging is finished, disengaging a slagging power supply loop; during slag firing, when the liquid level of a slagtank in the crystallizer submerges the lower edge of a conductive graphite block, conducting a roll core preheating power supply loop, and preheating a roll core; after preheating is finished, closingthe loop, lowering a self-consumption electrode to the end part, inserting into the slag tank, conducting an electrode melting and bimetallic compounding power supply loop, and finally performing thebimetallic melting compounding. The device and the method have the advantages that by adopting a method for improving the electric slag testing device and the power supply loop, the temperature fieldat the surface of the roll core is reasonably optimized, so as to prepare the bimetallic compounding roll with better interface bonding quality.

The invention provides a metal / ceramic gradient material and a preparation method thereof. The method comprises the steps that metal powder needed for each layer and element powder needed for ceramic synthesis are fully mixed and are subjected to mechanical alloying treatment according to designed gradient components, the number of gradient layers and the component content in each layer, and mixed powder needed for each layer is obtained; the mixed powder needed for each layer is subjected to cold pressing, and semi-densified powder blanks are obtained; the semi-densified powder blanks are laid up according to the designed gradient components, the number of gradient layers and the component content in each layer, and pre-formed blanks are obtained; the pre-formed blanks are vacuumized after being packaged through metal sheaths, and the packaged pre-formed blanks are obtained; and after the packaged pre-formed blanks are preheated, pulse current is applied to the packaged pre-formed blanks, so that a self-propagating high-temperature in-situ synthesis reaction is driven, and the metal / ceramic gradient material is obtained after the reaction finishes. The prepared metal / ceramic gradient material is full in reaction, high in density and good in bonding quality between gradient interfaces.

The invention discloses a high volume fraction grain enhanced aluminum-base compound material brazing filler metal and a preparation method thereof, relating to a grain enhanced aluminum-base compound material brazing filler metal and the preparation method thereof. The invention solves the problems of inferior solderability of high volume fraction grain enhanced aluminum-base compound material, inferior temperature resistance and corrosion resistance of brazing seam acquired by using the prior welding technique. The brazing filler metal of the invention is foil-shaped, made of Cu, Si, Mg, Bi, La, Li and Al. The method of the invention comprises the steps of: weighting raw materials, making the materials into an alloy pole, making quenched foil-shaped fiber material, and annealing. The brazing filler metal prepared by the invention has the advantages of excellent solderability and the brazing seam has temperature resistance and corrosion resistance.

The invention discloses a stainless steel composite steel tube and a manufacturing method thereof. The method overcomes the technical prejudices in the prior manufacture of brazing stainless steel composite steel tube, adopts a brass foil with lower price as a brazing material, and avoids the problems of environmental pollution, high cost, large energy consumption and the like in the prior art which uses a nickel-based brazing material coated layer; and a method for performing diffusion brazing by air-cooling a composite tube blank from bottom to top according to a temperature reducing gradient of between 100 and 200 DEG C per minute so as to solidify a brazing solder in sequence from bottom to top not only sufficiently fills the brazing material in the inner and outer tube gaps but also forms diffusion with a distance of a few microns with inner and outer layer materials, wherein an inner layer stainless steel tube and an outer layer carbon steel tube form good metallurgical bonding through a diffusion brazing layer; and simultaneously, the heating temperature, the soaking time and the cooling speed can make carbon steel in a normalized condition to obtain fine textures, and the strength matches well with the plasticity and the stainless steel which is in a solution state and has optimal corrosion resistance at the same time.

The invention discloses a multi-core reducing multi-ladle co-casting method and device for composite casting large composite steel ingots. The multi-core reducing multi-ladle co-casting method comprises the steps of selecting core blanks, regulating the temperatures of the core blanks, re-removing scales on the surfaces of the core blanks, assembling the core blanks and ingot molds, reducing oxide scales on the surfaces of the core blanks, casting and compositing and cooling composite ingots. The device adopted by the method comprises a tank body, a reducing gas inlet, a heat preservation layer, bolts, a bin door, risers, heat insulation plates, the steel ingot molds, the core blanks, shims, a trolley, an inert gas inlet, a bottom heat insulation layer, an exhaust port, an explosion-proof end cap, a vacuum exhaust valve, a vacuum pump, circulating fans, riser bricks, casting channels, sealing valve rods, sealing valve bodies, sealing valve plates, sealing asbestos, sliding nozzles and steel ladles. Large and ultra-large molded steel ingots which cannot be produced by means of an orthodox casting method can be manufactured. The steel ingots manufactured by means of the multi-core reducing multi-ladle co-casting method and device has the advantages of being low in production cost, high in solidification speed, small in internal segregation, even in components and high in finished product rate.

The invention discloses a preparation method of an interface strong metallurgical bonding metal layered composite material, and belongs to the technical field of metal layered composite material preparation. The method comprises the steps of heating to increase the temperature of a whole titanium / steel layered pre-composite blank to 705 to 875 DEG C, and conducting heat preservation; increasing temperature and heating the surface of a titanium material and the surface of a steel material of the titanium / steel layered pre-composite blank, respectively heating the areas, which are 0.5 to 0.8 time of the thickness of the titanium material and the thickness of the steel material, of the surface of the titanium material and the surface of the steel material towards the direction of a compositeinterface to 935 to 1350 DEG C, keeping the temperature of the composite interface at 705 to 875 DEG C, and then conducting heat preservation; and conducting 1 to 15 passes of hot rolling compoundingon the heated titanium / steel layered pre-composite blank, then conducting air cooling to the room temperature, and obtaining a titanium / steel layered composite plate strip. The method can be used forpreparing the titanium / steel layered composite plate strip with high interface bonding strength at low cost and high efficiency.

The invention relates to an intelligent source baffle plate system and a method thereof for preparing a hard coating. The system comprises a vacuum chamber, a circular gear ring, an intelligent source baffle plate, a gear reducer motor and a magnetofluid sealing transmission shaft. The method comprises the steps of (1) carrying out coating pretreatment; (2) carrying out vacuum pumping; (3) starting argon ion bombardment cleaning; (4) continuously carrying out high vacuum pumping to (4.0 to 9.0) * 10<-3> Pa, and carrying out target source predischarge cleaning; (5) continuously carrying out high vacuum pumping till the vacuum degree reaches 3.0 * 10<-3> Pa or above; (6) detecting the leakage rate of the vacuum chamber; (7) carrying out main arc metal ion bombardment and preparing a metal transition layer; (8) preparing a nitride coating through plating; and (9) after coating, inflating the vacuum chamber which is cooled to 150 to 250 DEG C, and after inflation, opening a door of the vacuum chamber to take out a workpiece. According to the system and the method, the content of residual gases in the vacuum chamber can be effectively decreased, the bonding strength of the hard coating and the surface of a base material and the performance of the hard coating are improved, mutual pollution between different cathode targets can be effectively prevented, and the quality and performance of a multi-layer or composite coating are improved.

The invention discloses a connecting rod expanding-cracking lathe, comprising a transmission chain, an expanding-cracking assembly, a bolt screwing assembly and a bush pressing assembly, wherein the expanding-cracking assembly, the bolt screwing assembly and the bush pressing assembly are sequentially located on a transmission journey of the transmission chain. According to the connecting rod expanding-cracking lathe provided by the invention, a combination face of a rod body and a connecting rod cover is in an entirely engaged staggered structure through a connecting rod separating face expanding-cracking process, so that the combination quality of the combination face is improved, the combination face has no need of being machined, and procedures of broaching, grinding and the like of a separating face can be eliminated; and meanwhile, the structural design of a bolt hole of the connecting rod and a whole body machining process further can be simplified, and the requirement on machining precision of the bolt hole can be reduced.

The invention discloses a method for preparing a bioactive coating on the surface of 3D printed titanium or titanium alloy. The method comprises the following steps: 1. surface treatment is conductedon titanium or titanium alloy to obtain surface-treated titanium or titanium alloy; and 2, anodic oxidation treatment is conducted on the surface-treated titanium or titanium alloy to obtain the titanium or titanium alloy with the bioactive coating on the surface. According to the method, through surface treatment, spherical powder particles in bad combination are removed, the film forming rate and stability of subsequent anodic oxidation are improved, the quality of the bioactive coating is improved, ]through anodic oxidation treatment, construction of a nanoscale structure on the surface oftitanium or titanium alloy is completed, so that the biological activity of the titanium or titanium alloy is improved, and the prepared bioactive coating is a TiO2 periosteum-like layer with nanoscale holes, is firmly combined with a substrate, is beneficial to better adhesion, differentiation and proliferation of cells on the surface of the bioactive coating, and is an ideal medical implant material.

The invention relates to a pattern-recognition-based method for integrating multiple materials on a substrate. The method comprises the steps that a substrate with a micro well pattern is prepared, and micro units which are complementary with the micro well pattern and are made of different materials are prepared through photoetching and reactive ion etching (RIE) corrosion processes; the substrate with the micro well pattern and micro units which are complementary with the micro well pattern and are made of different materials are put into a container containing acidity assembly fluid, and turbulent flow is generated in the container by using a pulse turbulence system, so that perturbation are produced for the micro units, and the micro units and the substrate with the micro well pattern are integrated into a whole in a self-assembly mode, wherein the micro units and the substrate with the micro well pattern are complementary in shapes; and a structure integrated by different semiconductor materials on a silicon substrate is finally formed, that is multi-semiconductor materials on silicon (MSMOS). The materials formed in a self-assembly mode meet the material demands that Moore's law is continued and exceeded, suggested by an international transactions reporting system (ITRS). Mismatch problem of heterogeneous growth is solved, and meanwhile the integration method of Heterogeneous materials in a self-assembly is simple, and cost is low.

In an explosive welding process, the collision energy of a substrate and a compound plate interface is overlarge to enable the interface to generate a superfusion phenomenon if the charging amount is overlarge, so that a bonding interface generates various defects to lower the interface intensity so as to greatly lower the quality of the compound plate. The principle of least action is embodied as the principle of lowest energy consumption in the physical process of explosive welding, i.e., the best bonding quality can be obtained with the minimum interface bonding energy, or i.e., the best bonding interface can be obtained by the minimum charging amount. A least action charging method is applied in the explosive welding technology, the charging amount is greatly lowered, the production cost is lowered, in addition, the quality of the compound plate is improved, and meanwhile, various key problems relating to the explosive welding are simplified. The explosive welding least action charging method is characterized in that the charging amount is selected according to the lower limit least value, and an interval between the two plates is selected according to an upper limit maximum value.

The invention relates to a method for composite treatment of dissimilar metal sheet by located irradiation and diffusion way, comprising the steps of: arranging an irradiation and diffusion connecting layer between a base layer and an upper composite layer of the dissimilar metal sheet, and carrying out mutual location treatment; heating and leading all parts to be even in temperature and well burnt, and ensuring the lower limit of the heating temperature to be 10 degrees lower than that of the material melting point of the irradiation and diffusion connecting layer; pressurizing to 10-30MPa, and maintaining the pressure for 1-10min; keeping the temperature and slowly cooling; and controlling the material melting point of the irradiation and diffusion connecting layer to be synchronously lower than that of the base layer and the composite layer, and leading the irradiation and diffusion connecting layer to have fusibility with the base layer and the upper composite layer. Compared with the prior art, the method has simple technique and good operation, generates no noise, thermal radiation and impact force in the compounding process, discharges no greenhouse gas, ensures the composite surface to have the texture being the same as that of base material, and has good combination quality, no damage for the surface of material and good mechanical properties of the combining surface. Furthermore, the method has the advantages of simple equipment, strong universality, simple and convenient operation and energy conservation.

The invention provides a coating with super bonding strength and a preparation method thereof.The method comprises the following steps that a base body with a surface to be subjected to laser directional energy deposition is provided, a bionic microstructure is machined on the surface to be subjected to laser directional energy deposition, and the bionic microstructure can be obtained through laser machining, 3D printing, electric spark machining and other manufacturing methods; the machined bionic microstructure can be of a wedge-shaped structure, a concave arc structure, a sawtooth-shaped structure, a honeycomb-shaped structure and the like, the laser directional energy deposition coating is prepared on the surface of the machined bionic microstructure through the laser directional energy deposition technology, and deposition materials can be iron-based alloy, nickel-based alloy, nickel-based composite powder and the like. According to the method, the bionic microstructure is firstly machined on the surface of the base body, then the coating is prepared on the surface of the bionic microstructure through the laser directional energy deposition technology, and the high-performance coating with high metallurgical bonding strength, high hardness and good toughness can be prepared at low cost.

The invention discloses multi-principle-element alloy and a method thereof for processing the surface of aluminum alloy. The alloy is prepared from, by molfraction, 14-22 parts of Co, 14-22 parts of Cr, 1-3 parts of Al, 14-22 parts of Si, 14-22 parts of Fe, 1-10 parts of Ti, 14-22 parts of Mn, 1-3 parts of B and 1-3 parts of La. The method includes the steps that an aluminum alloy substrate is firstly cleaned and subjected to sand blasting, multi-principle-element alloy powder is sprayed on the surface of the aluminum alloy substrate through a plasma spraying device, finally the plasma sprayed surface is remelted through a CO2 laser device, and then the multi-principle-element alloy is prepared. The characteristics of the high- entropy effect, the slow diffusion effect, nano phase strengthening, super-high lattice distortion and the 'cocktail effect' of the multi-principle-element alloy are utilized for a multi-principle-element alloy coating, high tenacity of the alloy can be easily kept, and the prepared coating has the beneficial effects of being high in strength, resistant to abrasion and the like.

The invention discloses a graphene-high-entropy alloy composite coating and a preparation method thereof, and belongs to metal surface modification. The method comprises the steps that firstly, Co powder, Cr powder, Ni powder, Fe powder and Cu powder are weighed according to the molar ratio of CoCrxNiFeCuy, the Co powder, the Cr powder, the Ni powder, the Fe powder and the Cu powder are put into a ball milling tank after being mixed, mechanical alloying is conducted, and high-entropy alloy powder is obtained; secondly, graphene is added into the high-entropy alloy powder, uniform mixing is conducted, absolute ethyl alcohol is added into the mixed powder, ultrasonic dispersion is conducted, then drying is conducted, and mixed powder is obtained; and thirdly, the mixed powder is sprayed to a metal matrix through plasma spraying equipment, and the GN-CoCrxNiFeCuy composite coating is obtained. According to the graphene-high-entropy alloy composite coating, the composite coating is compact, crystal grains are small, the interface between the coating and a base body is clear, and the bonding quality is high; and the coating has good high-temperature oxidation corrosion resistance.

The invention discloses an Al-Co-Cr-Cu-Nb-Si-Ti-V multi-principal element alloy and a method for surface treatment for a titanium alloy thereof. The alloy is composed of, by molecular fraction, 12-20 parts of V, 12-20 parts of Cr, 12-20 parts of Al, 12-20 parts of Si, 12-20 parts of Cu, 1-10 parts of Ti, 10-18 parts of Co and 10-18 parts of Nb. The method comprises the steps that a titanium alloy substrate is cleaned and subjected to abrasive blasting roughening, multi-principal element alloy powder is sprayed on the surface of the titanium alloy substrate through plasma spraying equipment, and finally the plasma-sprayed surface is subjected to remelting treatment through a CO2 laser. The multi-principal element alloy coating prepared through the method makes use of the characteristics such as the high-entropy effect, the slow diffusion effect, the nanophase strengthening, severe crystal lattice distortion and the 'Cocktail party effect' of the multi-principal element alloy, the abrasion resistance and the high temperature oxidation resistance of the titanium alloy are significantly improved, and titanium fire is prevented.

The invention discloses a single-process machining method of a multilayer metal composite material. The single-process machining method is characterized in that two or more solid metals or alloys are taken as raw materials, and circular arc workpieces of the different metals or the different alloys are placed closely and are spliced into a complete tube-shaped sample; the internal wall and the external wall of the tube-shaped sample are completely restrained by an internal restriction body and an external restriction body, pressure is applied to the annular end faces or the cylindrical surface of the tube-shaped sample, and the internal restriction body and the external restriction body rotate oppositely around a center axis shared by the internal restriction body, the external restriction body and the circular arc workpieces; the circular arc workpieces undergo tangential shearing deformation under a high hydrostatic pressure condition, constant growth of the contact surfaces of the different metals is realized, and interface multiplication is formed; and with the continuous increasing of a rotation angle, initial interfaces penetrating through the interior and the exterior of the tube-shaped sample, which are initially formed through close contact of the circular arc workpieces of the different metals gradually develop into spiral interfaces of which starting points and terminal points are formed at the internal wall and the external wall of the complete tube-shaped sample, and the spiral interfaces are wound by several circles in the tube wall, thereby forming a multilayer metal composite material structure. With the adoption of the single-process machining method, the disadvantages that the traditional metal layer composite material machining method is complicated, and low in efficiency, interfaces are prone to be polluted by the environment and the interface bonding quality is poor are overcome, and the multilayer metal composite material having required components, the required number of layers, the required layer thickness and the like can be prepared by a single process.

The invention discloses a method for preparing carbon nanotubes reinforced AZ61 magnesium alloy semi-solid slurry. The method comprises the following steps that ZrO2 coating is carried out on the surfaces of the carbon nanotubes, and the carbon nanotubes are prepared into an Mg-Al-Zn-ZrO2@CNTs intermediate precast block; under the casting condition, after AZ61 magnesium alloy is refined, a bell jar is used for pressing the intermediate precast block into an alloy melt in the argon protection state; high-energy ultrasound is applied in the adding process; then the temperature is rapidly reduced to 560-620 DEG C, heat preservation is carried out, short-time secondary high-energy ultrasound is applied, and then rapid water quenching is carried out; and finally, a semi-solid structure in which the carbon nanotubes are uniformly dispersed and magnesium alloy grains are fully spheroidized is prepared under an optimized process condition. The preparation method is safe to operate and stable in process, the structure of the prepared semi-solid slurry is obviously refined, and the interface bonding of the carbon nanotubes and the AZ61 magnesium alloy melt is good.

The invention discloses a multi-principal element alloy containing trace B and a method for surface treatment of a titanium alloy. The multi-principal element alloy comprises, by mole, 23-30 parts of Al, 23-30 parts of Si, 23-30 parts of Cu, 1-5 parts of Ti, 21-30 parts of Zr and 1-4 parts of B. According to the method, a titanium alloy base material is cleaned and subjected to sand blasting roughening treatment, then plasma spraying equipment is used for spraying multi-principal element alloy powder on the surface of the titanium alloy base material, finally the plasma-sprayed surface is subjected to remelting treatment through a CO2 laser device, and a coating is obtained. The prepared multi-principal element alloy coating adopts characteristics of high-entropy effect, slow diffusion effect, nanophase reinforcement, super-high lattice deformation, cocktail effect and the like of the multi-principal element alloy, abrasion resistance and high temperature oxidation resistance of the titanium alloy are remarkably improved, and titanium fire can be prevented.

The invention discloses a method for improving the strong plasticity of a magnesium alloy plate, which comprises the following steps: S1, performing solution treatment on the magnesium alloy plate to obtain a solid solution state magnesium alloy plate; performing solution aging treatment on the magnesium alloy plate to obtain Aging state magnesium alloy plate; S2, the solid solution state magnesium alloy plate and aging state magnesium alloy plate are alternately stacked to form a laminated plate with a multi-layer structure, and the outermost layer of the laminated plate is an aging state magnesium alloy plate, S3, the laminated plate is treated Extrusion compounding or rolling compounding to obtain finished products. It can simultaneously take into account the strength and plasticity of the magnesium alloy material, has a simple process flow, and is suitable for large-scale industrial applications.

The invention belongs to the technical field of composite material preparation, and relates to a method for preparing a high-entropy amorphous micro-laminated composite material, according to the method, amorphous alloy powder and high-entropy alloy powder with high toughness are loaded into a double-channel supersonic airflow powder feeding device, the amorphous alloy powder is Fe-Cr-Y-Ta-B alloy powder, and the high-entropy alloy powder is Fe-Cr-Co-Ni-Mn-Si alloy powder; a vertical distance between a laser focus and a substrate is 16-30 mm, and the laser power is 250-550 W; and process parameters are adjusted, the two kinds of powder are alternately sent out through airflow with supersonic speed, and finally the high-entropy amorphous micro-laminated composite material is formed. According to the invention, a special construction method of the micro-laminated composite material is adopted, so that the composite material can be toughened by utilizing various favorable characteristics of an interface due to a large number of interfaces in the composite material while the advantageous properties of high strength of an amorphous alloy and high toughness of a high-entropy alloy are integrated, and the comprehensive properties of the composite material are further improved.

An in-mold injection molding heat dissipation coating structure capable of carrying an electronic device, includes a front housing and a rear housing adapted for a portable electronic device, characterized in that: the front shell and the rear shell are respectively injection molded in a cavity of a plastic injection mold, A heat dissipation coating structure is transferred directly to the injection molding, so as to achieve the maximum effective heat dissipation area, The heat dissipated from the chip heat source is evenly distributed in the whole cavity through the heat dissipation coating structure, and the heat exchange with the outside world is definitely reduced relative to the core temperature, which does not cause the airframe to be hot or crash problem, and relatively can give full play to the performance of the electronic equipment, so that consumers can have a better man-machine experience.