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

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 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 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 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 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 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 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 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.