1856 results about "Alloy composite" patented technology

An extrudable and weldable matrix alloy composite comprising: a) a base material metal of about 50 to 99.9% by weight, b) boron carbide or silicon carbide of about 0.1 to 50% by weight, c) less than about 3.0% by weight of at least one metal having an intermetallic phase temperature lower than the melting point of the base material metal, and d) a reinforcement agent of up to about 5% by weight.

The invention provides a powder metallurgy preparation method of a carbon nanotube reinforced aluminum alloy composite material. The method comprises the following steps: pre-preparing micro-nano flake powder of an alloying component, subsequently ball-milling the powder with a carbon nanotube and spherical pure aluminum powder to prepare flake composite powder, and further performing densifying, sintering, thermal deformation processing and thermal treatment to achieve alloying so as to finally obtain the carbon nanotube reinforced aluminum alloy composite material. Uniform compounding of the matrix aluminum powder, the carbon nanotube and the alloying component can be achieved through limited ball-milling, and meanwhile dangerous elements or uneasy grinding elements such as magnesium and silicon which are high in activity and likely to combust and explode are avoided by adopting the stable and easily ground pre-alloying aluminum powder, so that the security and the reliability are improved; in addition, because of large interlayer boundary and small layer thickness distance, the flake structure is beneficial for uniformly dispersing the alloying component and forming refined dispersed separated phase. The method is beneficial for bringing the effects of composite reinforcement of carbon nanotubes and alloy reinforcement into play to the maximum extent, is energy-saving and time-saving, and is safe and feasible.

The invention discloses a method for preparing a bimetallic nanometer alloy composite material by taking graphene as a carrier. The method comprises the following steps of: by taking a precious metal N salt (N=Pd, Pt) and a transition metal M salt (M=Co, Ni and Cu) as precursors and taking graphene oxide as a matrix, reducing the components by employing a reducing agent; and finally, washing, filtering, drying, grinding and roasting to obtain the high-purity graphene bimetallic nanometer composite material. The composite material has high nanoparticle load capacity, stable structure, high uniformity and high dispersing property, has high binding force with the graphene and is high-efficiency in preparation method, low in cost, simple in process and suitable for industrial production. The composite material can be widely applied to the fields of magnetic targeting materials, various catalysts, electromagnetic shielding wave-absorbing materials, super-capacitor electrode materials and other related function materials.

The invention discloses a road vehicle brake disc made of carborundum foamed ceramics/aluminum alloy composite materials and a production method of the road vehicle brake disc. The body of the reinforced-aluminum-alloy brake disc with a carborundum foamed ceramics framework is made of reinforced aluminum alloy materials such as aluminum alloy or nano ceramics particles or carbon nano-tubes. The carborundum foamed ceramics framework is integrally casted on two symmetrical friction surfaces of the brake disc, and heat dissipation grooves or air holes can be casted or do not need to be casted on the friction surfaces. A plurality of heat dissipation ribs are casted in the peripheral direction of non-friction surfaces. Mounting holes are formed in the disc body. The production method includes the steps of production of the carborundum foamed ceramics framework, preprocessing of the framework, design and production of a casting mold of the brake disc, lower-pressure casting of the brake disc, heat treatment of the brake disc, precision processing of the brake disc and storage of a finished product. The brake disc is simple in production technology, light in weight, high and stable in friction factor, high in heat conductivity, long in service life and applicable to existing road vehicles.

A shock and vibration isolator device has one or more connecting elements of a superelastic shape memory alloy composite material extending between a base member, configured to mount to a structure or ground, and a mounting member, configured to support equipment or machinery. The superelastic shape memory alloy composite material is formed of a plurality of superelastic wires embedded in an elastomeric matrix material.

The object of the present invention is to strongly join an aluminum alloy part with an FRP prepreg. An object obtained by subjecting an aluminum alloy to a suitable liquid treatment so as to form a surface having large, micron-order irregularities and also fine irregularities with a period of several tens of nanometers, eliminating the presence of sodium ions from the surface and additionally forming a surface film of aluminum oxide, which is thicker than a natural oxide layer, has been found to have a powerful adhesive strength with epoxy-based adhesives. By simultaneously curing an FRP prepreg which uses the same epoxy-based adhesive in the matrix, an integral composite or structure in which FRP and aluminum alloy have been united at a joining strength of unprecedented magnitude is produced.

A carbon nanotube carrying magnetic alloy particles on its surface and used as wave absorbing material is prepared through uniformly dispersing carbon nanotubes in the solution of the sulfate of Fe, Co and Ni, and oxidizing-reducing reaction for deposition the magnetic alloy particles on carbon nanotubes.

The invention discloses a method for preparing an aluminum-based graphene composite material. According to the method, firstly, a grapheme and aluminum alloy composite material precast ingot is prepared; then the precast ingot is added into aluminum alloy melt for re-melting, and an aluminum-based graphene composite material cast ingot is obtained through the casting technique; finally, the cast ingot is homogenized, and high-strength aluminum-based graphene composite material bars or plates are obtained through forming techniques such as hot extrusion or rolling. The method well solves the problems about compounding and homogenization of grapheme and aluminum alloy, and the doping amount of the grapheme in the composite material can be precisely adjusted; the preparation method is provided on the basis of semi-continuous casting and is simple and efficient, and large-scale industrialization is easy to achieve.

The invention relates to a compound material of millimicron metal or alloy/electrode active substance, comprising: millimicron metal or alloy and electrode active substance; millimicron metal or particle of alloy takes up 0.02~30 wt% of electrode active substance. The compound material is negative electrode active material of secondary lithium battery, cooperating with of metal oxide containing lithium, organic electrolyte solution, diaphragm, battery shell, and afflux agent and lead, to form secondary lithium battery. The electrode active substance of compound material supplies rigid skeleton structure and center for inlaying lithium, helps the formation of solid electrolyte layer on the surface of electrode active substance which has excellent ion conducting power; can avoid destruction to lamellar structure of graphite, stop unit of millimicron material effectively and increase periodicity and capacity of discharge and discharge with large current. The a secondary lithium battery has excellent abilities of circulation and safety, suitable for the place needing fairly high energy density.

A magnesium alloy composite material includes a magnesium alloy matrix, and a nanoparticle second phase material dispersed in the magnesium alloy matrix. The nanoparticle second phase material has an average particle size ranging from 1.0 nm to 100 nm. Preferably, the amount of the nanoparticle second phase material ranges from 0.05 wt % to 2.5 wt % based on total weight of the magnesium alloy composite material. With the addition of the nanoparticle second phase material to the magnesium alloy matrix, hardness can be increased to a relatively high level without significantly increasing density.

The invention discloses a non-magnetic cube texture Cu-based alloy composite base band. The non-magnetic cube texture Cu-based alloy composite base band is prepared by compositing surface layers and a core layer and has the structure of surface layer, core layer and surface layer, wherein each surface layer is copper-nickel alloy in which the weight percentage of nickel is less than 50 percent; and the core layer is nickel-tungsten alloy in which the atomic percentage of tungsten is between 9 and 12 percent. A preparation method by using powder metallurgy comprises the following steps: (1) initial powder mixing and mold filling; (2) compressing and sintering of a composite green compact; (3) deforming and rolling of the sintered composite bullet; and (4) recrystallizing heat treatment for a cold rolling base band. The preparation method improves the mechanical strength of the whole base band and simultaneously ensures the non-magnetic performance of the whole base band; and the composite base band has high yield strength.

The invention discloses a nano ceramic particle reinforced nickel-based superalloy composite material and a laser 3D printing forming method thereof. A nickel-based superalloy with the particle size of 15-45mu m is taken as a matrix, CrC with the particle size of 40-100nm is taken as a reinforced phase, and the addition amount of CrC is 2.0-8.0% by weight of the composite material matrix; a nano CrC particle hybrid reinforced nickel-based superalloy composite material part has the advantages of good high-temperature anti-corrosion property, abrasion resistance, high temperature creep and the like and can meet special performance requirements of an aero-engine hot end component at high temperature; a high-energy laser forming method is applicable to preparation of a difficult-to-process material and forming of a complex part; and a forming die is not needed, so that a manufacturing cycle is shortened, and the cost is reduced.

A method for producing an aluminum alloy composite material for a heat exchanger, which contains the steps of: homogenizing an aluminum alloy core alloy by keeping at 530° C. or more for 15 hours or more; fitting an Al—Si-series filler alloy on one side or on both sides of the core alloy; hot rolling; cold rolling; intermediate annealing, to completely recrystallize the core alloy; and giving a strain of 1 to 10%, wherein the aluminum alloy core alloy contains 0.01 to 1.0% by mass of Si, 0.1 to 2.0% by mass of Fe, 0.1 to 2.0% by mass of Cu, 0.5 to 2.0% by mass of Mn, and less than 0.2% by mass (including 0% by mass) of Ti, with the balance being Al and inevitable impurities; and an aluminum alloy composite material produced by the method.

The invention discloses a manufacturing method of a detachable ceramic alloy composite grinding roller. The manufacturing method comprises the following steps: firstly, uniformly mixing ceramic particles and low-melting-point alloy powder by binders so as to obtain a mixture; stuffing the mixture in a mold cavity, and forming the mixture into a biscuit; putting the biscuit together with a mold into a drying cabinet, and drying and sintering the biscuit to obtain a ceramic precast part; and taking out the sintered ceramic precast part, fixing the taken ceramic precast part on the surface of a roller skin liner casting mold cavity, casting abrasion-proof alloying metal liquid to obtain a roller skin liner of which the surface presents metallurgical bond by the ceramic precast part and an abrasion-proof alloy material, and finally fixing the roller skin liner on the surface of a roller core. According to the manufacturing method of the detachable ceramic alloy composite grinding roller disclosed by the invention, the roller skin liner is small in size and light in weight, the casting quality and the heat treatment technology are easy to control, and the qualified rate of finished products is high; the surface of the roller skin liner is composited by the high abrasion-proof ceramic precast part and an abrasion-proof alloy, so that the surface of the roller skin liner has double abrasion-proof properties and the toughness of the metal materials; the end surface of the roller skin liner is fixed by bolts, so that the roller skin liner can be detached on the site, and a new roller skin liner is replaced.

The invention relates to an electric plating product, which comprises parent material and copper-tin alloy composite coatings on the surface of the parent material, therein, the copper-tin alloy composite coatings adopts multilayer, the copper content of at least one layer of the copper-tin alloy composite coatings is different from the copper content of the other copper-tin alloy composite coatings. The invention also provides the preparation method of the electric plating product. The electric plating product comprises the multilayer copper-tin alloy composite coatings, at least one layer of the copper-tin alloy composite coatings is different from the copper content of the other copper-tin alloy composite coatings, thereby, the electric plating product simultaneously has higher vibration abrasion resistance and corrosion resistance, and the good combination property is realized.

The invention discloses a metal extruding, casting and forging forming method and products of the method, and particularly relates to the extruding, casting and forging forming method of light alloy or light alloy composite materials in the same die, and the products of the method. The extrusion casting technology and the continuous casting and continuous forging technology are improved, and the method mainly solves the problem that the plastic deformation of the continuous-casting and continuous-forging critical deformation. According to the technical scheme, an unfilled cavity is reserved at the casting stage, the volume of the cavity needs to be larger than the size corresponding to the workpiece forging critical deformation, and then at the forging stage, through plunger extrusion, the cavity is fully filled in the plastic deformation process or grain refinement filling process. The method is a novel metal hot working forming method, casting, forging and semi-solid state processing are integrated, and the method is suitable for manufacturing high-performance force bearing parts and airtight parts like aluminum wheels and connecting rods.

The invention discloses a method for manufacturing a dissimilar aluminum alloy composite automobile hub. The method comprises the following steps of: manufacturing a rim; manufacturing a spoke of which the outer diameter is slightly greater than the inner diameter of the rim; heating the rim, and pressing the spoke into a mold provided with a positioning device to be in clearance assembly with the rim; and performing friction stir spot welding by dividing the rim and the spoke subject to clearance assembly into a plurality of points according to peripheries. The spoke and the rim are assembled in a clearance fit manner, so the spoke and the rim are firmly bonded without being welded; and the spoke and the rim are connected through stir friction spot welding, the method has less thermal influence on the texture and the performance of the hub than friction stir welding and girth welding, and a welded junction of the dissimilar aluminum alloy composite automobile hub obtained through the method is not needed to be subjected to thermal treatment; therefore, a production technology is simplified, the overall performance of the hub is greatly improved, and the aim of losing the weight of the hub is fulfilled.