30results about How to "Improved interfacial bonding properties" patented technology

The invention discloses a low temperature glass phase enhanced SiCp / Cu composite material and a preparation method thereof, and belongs to the technical field of ceramic enhanced metal-based composite material preparation. SiC particles coated by a glass phase are dispersed in Cu matrix of the SiCp / Cu composite material; and the glass phase comprises SiO2 and K2O, wherein a molar ratio of SiO2 to K2O is 2-6 and a volume ratio of SiC to SiO2 and Cu in the glass phase is 1:(0.2-1.2):(2-4). On one hand, the low temperature glass phase has good interface wettability with the SiC particles in melting, a certain amount of Cu2O is formed on the Cu-based particle surfaces during a sintering process of the composite material, and Cu2O participates in formation of interface glass phase, so that the Cu matrix has good adhesion with the glass phase. On the other hand, the introduction of the interface glass phase can prevent direct surface contact of a plurality of SiC particles in aggregation and prevent mutual diffusion of reactant atoms in an interface solid-phase reaction, thereby effectively inhibiting formation of interface solid-phase reaction products and enabling the composite material to gain excellent comprehensive mechanical properties.

The invention belongs to the technical field of graphene composite materials and relates to a titanium-based nanocomposite material reinforced through graphene and a preparation method, in particularto a graphene-reinforced titanium-based nanocomposite material and a preparation method. Firstly, oxidized graphene nanosheets of 0.01 wt%-1.0 wt% of titanium alloy powder are weighed to be added intoabsolute ethyl alcohol to be stirred and mixed, then disperse treatment is conducted through an ultrasonic cell pulverizer, and an oxidized graphene solution is prepared; then the titanium alloy powder with the alloying element content being larger than 10 wt% and the oxidized graphene solution are stirred and mixed under inert protection, and oxidized graphene and titanium alloy powder compositepowder is obtained; and finally, the composite powder is loaded into a graphite mold to be sintered, through vacuum pumping and sintering forming, oxidized graphene is basically decomposed to form graphene, and therefore the graphene-reinforced titanium-based nanocomposite material with the excellent mechanical property is prepared. In the graphene-reinforced titanium-based nanocomposite material, the graphene is uniformly dispersed, and the preparation method is simple, efficient and suitable for batch preparation.

The invention discloses steel for an aluminum-coated substrate and a production method. The steel is prepared from, by weight, 0.005-0.03% of C, 0.005% or less of Si, 0.2-0.6% of Mn, 0.015% or less ofP, 0.005% or less of S, 0.005% or less of Al, 0.006-0.02% of N, 0.006-0.05% of O and the balance Fe and inevitable impurities, wherein the ingredient content meets the formulas: O+N>=0.013% and 0.5<=(O+N) / (P+S)<=5. The matrix structure of the steel for the aluminum-coated substrate is ferrite and bainite. According to the steel for the aluminum-coated substrate, the yield is 200-320 MPa, the strength of extension is 320 MPa or above, and the ductility A50% is 35% or above. The steel for the aluminum-coated substrate has excellent toughness and steel-aluminum interface combining performance, has the good heat dissipation and corrosion resistance effect after being coated with aluminum, and can be used for manufacturing of automobile wheels, heat dissipation devices, anti-corrosion boxes and the like.

The invention discloses a high-strength aluminum-coated plate strip and a production method thereof. The high-strength aluminum-coated plate strip is of a structure composited by an aluminum strip anda steel strip. The steel strip comprises the chemical components of, by weight, 0.03%-0.06% of C, larger than 0% and smaller than or equal to 0.005% of Si, 0.4%-0.8% of Mn, no more than 0.015% of P,no more than 0.005% of S, no more than 0.005% of Al, 0.0062%-0.02% of N, 0.006%-0.05% of O, 0.002%-0.004% of Ca, 0.01%-0.03% of Ti and the balance Fe and inevitable impurities; and meanwhile, the sumof the contents of O and N is larger than or equal to 0.013%, and the relation of 0.5<=(O+N) / (P+S)<=5 is met. The aluminum-coated plate strip has high strength of steel; as for the aluminum-coated plate strip, the yield strength is 280-400 MPa, the tensile strength is 420 MPa or above, and the elongation rate is larger than 28%; and meanwhile the aluminum-coated plate strip has the characteristicsof good properties of plasticity, cold-bending, stamping and the like, corrosion resistance of aluminum, heat dissipation and attractiveness and can be used for production of heat dissipation devices, heat dissipation pieces, wheels and corrosion resistant boxes.

The invention relates to the technical field of preparation and repair of sliding bearing Babbitt metal anti-friction layers. The novel cold spraying technology is introduced into manufacturing and repair remanufacturing of a Babbitt metal sliding bearing bush lining anti-friction layer, atomization powder feeding is adopted to obtain coating microstructures with uniform components and fine dispersely-distributed and uniformly-dense crystal grains and second phases through cold spraying, and the good interface bonding characteristic is obtained through tinning layer setting and sprayed thermal treatment; the defects of poor structure uniformity, thermal impact, stress, cracking and oxidizing burning losses existing in the technologies such as a traditional casting method, an overlaying method and a thermal spraying method are overcome, the bearing bush component preparation quality and level are improved, the bush burning frequency is decreased, stopping supercritical vibration is lowered, the stability, accuracy and reliability of a bearing transmission unit are improved, and the service life of the bearing transmission unit is prolonged; the method is rapid, efficient and environmentally friendly, is used for bearing bush manufacturing and repair remanufacturing, and has good economic benefits and social benefits.

The invention discloses a corrosion-inhibiting aluminum-clad strip, which comprises a steel substrate and an aluminum layer coated on the surface of the steel substrate; the mass percentage ratio of chemical elements of the steel substrate is: 0<C≤0.02%, 0< Si≤0.005%, Mn: 0.05‑0.5%, P: 0.018‑0.03%, Al≤0.005%, Cu: 0.04‑0.1%, Cr: 0.1‑0.25%, N: 0.0040‑0.010%, Ti: 0.01‑0.04 %, O: 0.02‑0.050%, the balance being Fe and other unavoidable impurities. In addition, the present invention also discloses a method for manufacturing the above-mentioned corrosion-inhibiting aluminum-clad strip, which includes the steps of: (1) preparing the steel strip and the aluminum strip; (2) performing surface treatment on the steel strip and the aluminum strip; 3) Covering the aluminum strip on the surface of the steel strip and rolling at room temperature; (4) Annealing; (5) Finishing and straightening.

The invention provides an aluminum-coated plate strip with an excellent heat dissipating effect and a production method thereof. The aluminum-coated plate strip is of a composite structure of an aluminum strip and a steel strip, and the steel strip comprises the components of, by weight, 0.005-0.03% of C, larger than 0 and smaller than or equal to 0.005% of Si, 0.2-0.6% of M, smaller than and equal to 0.015% of P, smaller than and equal to 0.005% of S, smaller than and equal to 0.005% of Al, 0.0062-0.02% of N, 0.006-0.05% of O and the balance Fe and inescapable impurities, wherein the conditions of O+N>=0.013% and 0.5<=(O+N) / (P+S)<=5 are met at the same time. The aluminum-coated plate strip has the strength of steel, is 200-320 MPa in yield strength and larger than or equal to 340 MPa in tensile strength, has the good plasticity and performance of cold bending, stamping machining and the like, has the characteristics of corrosion resistance, heat dissipation and beauty of aluminum, andcan be used for production of heat dissipating devices, heat dissipating pieces and wheels.

The invention discloses a lightweight designed aluminum-coated base plate and a production method thereof. The components of the aluminum-coated base plate comprise, by weight, 0.04-0.08% of C, greater than zero and no more than 0.005% of Si, 0.9-1.8% of Mn, no more than 0.015% of P, no more than 0.005% of S, no more than 0.005% of Al, 0.0062-0.02% of N, 0.05-0.06% of O, 0.002-0.004 of Ca, 0.01-0.03% of Ti, 0.01-0.03% of Nb, and the balance Fe and unavoidable impurities; and meanwhile the conditions that O+N is greater than or equal to 0.013%, and (O+N) / (P+S) is greater than or equal to 0.5 and less than or equal to 5 are met. The yield strength of the aluminum-coated base plate is 400 MPa or above, the tensile strength is 500-800 MPa, meanwhile, the elongation rate A50% is 18% or above, and the plasticity is excellent. The aluminum-coated base plate is mainly used for production of aluminum-coated plate strips and can be used for manufacturing automobile wheels and heat dissipation elements, corrosion-resistant boxes and the like, and lightweight design is achieved.

The invention discloses steel for an aluminum-coated base plate and a production method thereof. The steel comprises, by weight, 0.03%-0.06% of C, no more than 0.005% of Si, 0.4%-0.8% of Mn, no more than 0.015% of P, no more than 0.005% of S, no more than 0.005% of Al, 0.0062%-0.02% of N, 0.006%-0.05% of O, 0.002%-0.004% of Ca, 0.01%-0.03% of Ti and the balance Fe and inevitable impurities; and meanwhile, the sum of the contents of O and N is larger than or equal to 0.013%, and the relation of 0.5<=(O+N) / (P+S)<=5 is met. According to the steel for the aluminum-coated base plate, the yield strength is 280-400 MPa, the tensile strength is 420 MPa or above, and the elongation rate A50% is 28% or above; the steel can be used for production of an aluminum-coated plate strip, the related plate strip can be composited with materials such as aluminum with better radiating performance, accordingly, the radiating problem of wheels is solved, and the steel is used for manufacturing the wheels, radiating devices, corrosion resistant boxes and the like.

The invention discloses an aluminum-clad strip, which comprises a steel substrate and an aluminum layer coated on the surface of the steel substrate; the mass percentage ratio of chemical elements of the steel substrate is: 0<C≤0.02%, 0<Si≤0.005 %, Mn: 0.05‑0.5%, P: 0.018‑0.03%, Al≤0.005%, N: 0.0040‑0.010%, Ti: 0.01‑0.04%, O: 0.02‑0.050%, the balance being Fe and other unavoidable of impurities. In addition, the present invention also discloses a method for manufacturing the above-mentioned aluminum-clad strip, which includes the steps of: (1) preparing the steel strip and the aluminum strip; (2) performing surface treatment on the steel strip and the aluminum strip; (3) The aluminum strip is covered on the surface of the steel strip for room temperature rolling; (4) annealing; (5) finishing and straightening. The aluminum-clad plate strip has good mechanical properties, and the steel-aluminum interface bonding performance is excellent.

The invention belongs to the field of material processing, and discloses a honeycomb ZTA ceramic prefabricated body coated with Fe-Cr-Ni-Ti micropowder, a preparation method and application thereof. Fe, Cr, and Ni elements are the main elements in chromium-based cast iron and high manganese steel. After alloying with Ti powder, it is beneficial to reduce the melting temperature of pure Ti powder. It is conducive to the formation of molten Ti, and through the diffusion reaction between Ti and oxygen in ZTA ceramics, a metal-ceramic bonding interface with high bonding strength is realized. In addition, water glass and CO 2 The reaction produces silicic acid with a certain connection strength, which promotes the bonding between ZTA ceramic particles and the shaping of the preform, and is beneficial to the preform's resistance to the erosion of poured liquid metal. In addition, paraffin wax is used as a pore-forming agent, which is beneficial to the uniform distribution and communication of cavities in the preform. Therefore, it can be well applied to the preparation of metal matrix composites.

The invention provides a high-surface-quality aluminum-coated plate strip with an easy stamping machining function and a production method thereof. The aluminum-coated plate strip is composited of analuminum strip and a steel strip; the steel strip comprises the chemical compositions of, by weight, no more than 0.01% of C, 0.006-0.015% of Si, 0.05-0.3% of Mn, no more than 0.015% of P, no more than 0.01% of S, no more than 0.005% of Al, no more than 0.005% of N, 0-0.05% of Ti, 0.01-0.08% of O, and the balance Fe and unavoidable impurities; and the following formulas are met, specifically, C+N<=0.012%, Mn / S>=8, and Ti / (3.42N+4C)>=1. The aluminum-coated plate strip has good steel and aluminum bonding properties and adapts to single pass large deformation, and stamping machining performance and the high surface quality are achieved; and the aluminum-coated plate strip meets 300 MPa or above of tensile strength, the elongation exceeds 30%, and the aluminum-coated plate strip can replace analuminum-plated plate to be used for production of automobile engine sound-insulation covers, home appliance panels, food processing trays and the like.

The invention belongs to the technical field of titanium alloy materials, and relates to a flame-retardant graphene titanium-aluminum-based composite material and a preparation method. The composite material is prepared from the following components in percentage by mass: 0.01 to 1 percent of graphene oxide and a titanium and aluminum compound. By adoption of a method of combining temperature-controlled mechanical stirring, vacuumizing treatment, hot isostatic pressing and the like, interface bonding characteristics of graphene oxide and titanium and aluminum compound mixed powder are improved, and the bulk density and the subsequent forming property of the mixed powder are improved; furthermore, the graphene oxide is basically decomposed to form graphene which is uniformly dispersed, so that the excellent mechanical property and the physical and chemical properties of the graphene are fully exerted; the flame retardant property of the obtained composite material is twice that of a common high-temperature titanium alloy or above, and the heat resistance is higher; and a brand-new technical scheme is provided for solving titanium fire of an aero-engine. The flame-retardant graphenetitanium-aluminum-based composite material is a novel material concept; a prepration process is short, can accurately control parameters, and is suitable for batch preparation.