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

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 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 titanium fire preventing flame-retardant coating and a preparation method thereof. A laser cladding method is adopted to coat a titanium-aluminum intermetallic compound coating located on the surface of a titanium alloy matrix, and a compact Al2O3-enriched compound oxidation product can be formed on the surface after combination of the titanium-aluminum intermetallic compound coating. The preparation method includes the steps of preparation of titanium-aluminum intermetallic compound powder, drying treatment of the pre-cladded titanium-aluminum intermetallic compoundpowder, pretreatment of the titanium alloy matrix, laser cladding, heat treatment and the like. The flame-retardant property of the prepared titanium-aluminum intermetallic compound coating is improved to be more than twice that of the titanium alloy matrix, and meanwhile the combination degree of the coating and the matrix is good. Moreover, high strength of the coating is combined with high toughness of the matrix, and thus the composite structure which is tough inside and hard outside is more suitable for the service environment of aero-engines. The titanium fire preventing flame-retardantcoating is simple in preparation technology and has repeatability, the experimental cost is low and application prospects are broad.

The invention discloses a lightweight aluminum coated sheet strip and a production method thereof. The lightweight aluminum coated sheet strip is of an aluminum strip-steel strip composite structure.The steel strip comprises, by weight, 0.04-0.08% of C, greater than 0 and less than or equal to 0.005% of Si, 0.9-1.8% of Mn, less than or equal to 0.015% of P, less than or equal to 0.005% of S, lessthan or equal to 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, 0.01-0.03% of Nb and the balance Fe and inevitable impurities, wherein the sum of O and N isgreater than or equal to 0.013%, and 0.5<=(O+N)/(P+S)<=5. According to the aluminum coated sheet strip, the yield strength is 400 MPa or above, the tensile strength is 500-800 MPa, meanwhile, the elongation A50% is 18% or above, thus, the aluminum coated sheet strip has the strength of steel, the properties such as good plasticity, colding bending, stamping and the like and the characteristics ofcorrosion resistance, radiating performance and attractive appearance of aluminum, and can be used for production of radiators, radiating fins and wheels, and lightweight design can be achieved.

The invention discloses a SiC/Cu composite material and a preparation method thereof. The continuous phase of the composite material is a glass phase, and SiC particles and Cu particles are uniform wrapped in the glass phase. The SiC/Cu composite material has the following advantages: the glass phase is filled between the SiC particles and the Cu particles, so the contact between the SiC particles and the Cu particles is avoided; and the low temperature glass phase forms interface layers on the surfaces of the SiC particles and the Cu particles, so the interface combination characteristic of the SiC/Cu composite material is effectively improved, the problems of non-wetting between a molten Cu phase and a SiC phase and easy interface reaction of the above two phases at a high temperature are solved, the interface bonding force is enhanced, and the hardness and the bending strength of the composite material are improved, thereby the composite material has good and stable comprehensive mechanical performances.

The invention belongs to the technical field of manufacturing of power systems for hybrid electric vehicles, and relates to an EFB start-stop battery for a PHEV and a manufacturing process. The EFB start-stop battery comprises an integral tank, a plurality of plate groups mounted in the integral tank and acid liquor in the integral tank, wherein each plate group consists of a positive plate and a negative plate which are alternately stacked. The positive plate adopts a punching net radioactive structure design, ribs of the positive plate are thick at the upper part and thin at the lower part, are radial and are formed in a staggered manner; the ribs of the negative plate grid are in thickness transition design and are formed in a staggered manner, and the area of grids formed by the staggered ribs is small in top and large in bottom; in the same plate group, the positive plate is encapsulated by a high-strength PE partition plate, the positive and negative tabs are connected in parallel in a cast-weld manner, and all the plate groups are connected in series; and the density of the acid liquor is controlled to be 1.275 to 1.285 g/ml. The deep discharge cycle life of the battery is remarkably prolonged, the charge receiving capability of the battery is remarkably improved, the key technical problem of an EFB start-stop battery for a PHEV automobile is solved, and the invention has great technical improvement value and production and popularization value.

The invention discloses a titanium alloy compound material for dental department and a preparation method thereof. The titanium alloy compound material for the dental department is prepared from the following chemical components in percentage by weight: 2 to 3 percent of Cu, 3 to 5 percent of Zr, 0.05 to 0.1 percent of Ce, 0.02 to 0.1 percent of Ag, 10 to 15 percent of graphene oxide fibers and the balance of Ti. According to the titanium alloy compound material for the dental department, graphene oxide is added so that the mechanical property is greatly enhanced; compared with an alloy matrix, the composite material provided by the invention has the advantages that the plasticity is greatly improved when the room-temperature strength of the composite material is improved, and the corrosion resisting performance of the titanium alloy compound material for the dental department is ensured; an inert gas protected stirring method is used for preparing mixed slurry of the graphene oxide and alloy powder, the interface bonding property of the graphene oxide and the alloy powder is improved, and oxidization of the alloy powder is avoided, so that the molding property of subsequent powdersintering is improved; a processing technology of the preparation method is simple, and the preparation method is easy to popularize in a large scale.

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 a corrosion inhibition aluminum coated plate strip. The corrosion inhibition aluminum coated plate strip comprises a steel base plate and an aluminum layer coated on the surface of the steel base plate. The steel base plate comprises chemical elements: by mass, more than 0 and less than or equal to 0.02% of C, more than 0 and less than or equal to 0.005% of Si, 0.05-0.5% ofMn, 0.018-0.03% of P, less than or equal to 0.005% of Al, 0.04-0.1% of Cu, 0.1-0.25% of Cr, 0.0040-0.010% of N, 0.01-0.04% of Ti, 0.02-0.050% of O, and the balance Fe and other inevitable impurities.In addition, the invention further discloses a manufacturing method of the corrosion inhibition aluminum coated plate strip. The manufacturing method comprises the steps of (1) manufacturing a steelstrip and an aluminum strip; (2) conducting surface treatment on the steel strip and the aluminum strip; (3) coating the surface of the steel strip with the aluminum strip and then conducting indoor-temperature rolling; (4) conducting annealing; and (5) conducting finishing and straightening.