36results about How to "Reduced interfacial bond strength" patented technology

The invention relates to a high strength self-lubricating iron-copper powder composite material, a preparation method and application thereof. The composite material is characterized by comprising an iron alloy base body and a copper alloy base body as a surface layer, wherein the iron alloy base body contains Cu, C, Sn, Pb and Fe, and the copper alloy base body contains Ni, C, MoS2, Sn, Fe, Pb and Cu. The preparation method comprises the following steps of: respectively preparing copper alloy layer warm-pressing powder and iron alloy base body warm-pressing powder; filling the warm-pressing powder into a mould and then pressing once to form a green compact; sintering the green compact in the protection atmosphere; and shaping the sintered sintering compact in the mould so that the composite material is prepared. By the invention, the cost of parts can be greatly reduced on the basis of ensuring the use performance of the parts.

The invention discloses a preparation method of a high-performance titanium/steel bimetallic composite plate, and belongs to the technical field of preparation of bimetallic composite plates. A pure titanium slab and a low-carbon steel slab are subjected to annealing treatment, the hardness of the slabs is reduced, and the hardness of the pure titanium slab and the hardness of the low-carbon steelslab are close; then the to-be-composited surfaces of the slabs are cleaned, degreased and ground, wherein the grinding stripe direction is perpendicular to the rolling direction; then the pure titanium slab and the low-carbon steel slab are stacked to obtain a combined slab, the head of the combined slab is riveted, the combined slab is subjected to single-pass cold rolling pre-compounding, andthen heating is carried out; and finally, single-pass hot rolling final compounding is carried out, and the high-performance titanium/steel bimetallic composite plate is obtained. The method is low inequipment requirement, short in process flow, high in production efficiency and low in production cost. The interface bonding strength of the prepared titanium/steel bimetallic composite plate is larger than 230 MPa, the area bonding rate is 100%, and the method is particularly suitable for preparation of high-performance thin titanium/steel bimetallic composite plates or thin-titanium-layer titanium/steel bimetallic composite plates.

The invention discloses a high-strength, high-plasticity and anti-corrosion aluminum alloy laminated composite material and a manufacture method thereof, and belongs to the technical field of aluminumalloy laminated composite materials. The high-strength, high-plasticity and anti-corrosion aluminum alloy laminated composite material is composed of a 1-series or 3-series aluminum alloy multi-layermaterial and a 6-sereis aluminum alloy base layer material. Annealing treatment is conducted on the aluminum alloy multi-layer material and the aluminum alloy base layer material; washing degreasingand polishing treatment are conducted on to-be-composited surfaces, wherein the polishing stripe direction is perpendicular to the rolling direction; then, a combined blank material is obtained through laminating; single-pass cold rolling pre-compositing, heating and single-pass hot rolling compositing are sequentially conducted on the combined blank material subjected to head riveting; and finally, the high-strength, high-plasticity and anti-corrosion aluminum alloy laminated composite material with strong alloy combination adopted for the interface is obtained through solid solution-aging treatment. The high-strength, high-plasticity and anti-corrosion aluminum alloy laminated composite material and the manufacture method are low in device requirement, simple in process flow, short in period, high in production efficiency, low in energy consumption and low in cost, and the manufactured aluminum alloy laminated composite material has high strength, high plasticity and excellent anti-corrosion performance at the same time.

The invention discloses a method for preparing a concrete preservative and belongs to the technical field of building materials. The method includes: performing mixed enzymolysis on vegetable protein,endopeptidase and water and inactivating the enzyme to obtain an enzymatic hydrolysate; heating, stirring and mixing a modified sodium alginate solution, the enzymatic hydrolysate and a calcium nitrate solution to prepare pretreated enzymatic hydrolysate; stirring and mixing the pretreated enzymatic hydrolysate, a modifying additive, activated chitosan, plant essential oil, a preservative component, modified sepiolite and modified fibers to prepare the concrete preservative. The concrete preservative makes concrete to have excellent mechanical property and durability and can reduce the slumploss of the concrete and improve workability of the concrete, so that the concrete preservative has extensive application range.

The invention discloses a method for preparing an electromagnetic shielding foamed aluminum composite material. The method includes the steps that a magnesium block and a hollow ceramics microsphere are added by stepping composition, then, after a pre-treated titanium hydride foaming agent is added, the surface is provided with a layer of dense oxidation film, thus the mixture can be foamed intensively in a certain temperature range, the effect of aperture decreasing is realized, and finally, a novel closed-cell foamed aluminum composite material is obtained. According to the method for preparing the electromagnetic shielding foamed aluminum composite material, the obtained closed-cell foamed aluminum composite material has the characteristics of being low in cost, small in aperture, highin strength, excellent in electromagnetic shielding performance and the like.

The invention discloses improved Sn-Ag-Cu lead-free solder and a preparation method thereof. Zr and Ni are added in Sn-Ag-Cu lead-free solder, the amount of the Zr and the amount of the Ni are controlled, addition of the Ni can further promote the dispersion distribution of the Zr so as to further refine the microstructure of the solder; the surface tension of a molten pool is reduced, a wetting and spreading area is expanded, and the welding wettability and the oxidation resistance of a solder alloy are improved; and formation of the defects such as cavities and bridging in the welding process is inhibited, surface oxidation of welding spots during the long-term use process is prevented, and the welding spots still have excellent electricity and heat conduction performance in long-term use. By means of the synergistic effect of the two elements, the welding wettability as well as the mechanical property, the high-temperature anti-aging performance and the electricity conduction and heat conduction performance of the welding spots are comprehensively improved, and the development requirements of electronic components are met.

The invention discloses a metal surface anti-corrosive paint, and belongs to the technical field of building material. A preparation method comprises following steps: rice husk, biogas slurry, cane sugar, and water are mixed for fermentation, a sodium hydroxide solution is added to adjust the pH value, filtering, refrigeration, ball milling, sieving, washing, drying, and nitrogen filling thermal insulation carbonization are carried out so as to obtain a modified filling material; Chinese medical stone is subjected to ball milling and sieving so as to obtain Chinese medical stone powder; the Chinese medical stone powder and a urea solution are mixed, and are subjected to ultrasonic treatment, filtering, and drying so as to obtain pre-treated Chinese medical stone powder; the pre-treated Chinese medical stone powder, carbomer 934, and ethanol are mixed, pressure reduction condensation and drying are carried out so as to obtain a modified additive; epoxy resin, a diluent, a curing agent,the modified filling material, the modified additive, a silane coupling agent, nanometer zinc oxide, phosphatide, ephedrine, polyisocyanate, and a mineral filler are stirred and mixed so as to obtainthe metal surface anti-corrosive paint. The metal surface anti-corrosive paint possesses excellent corrosion resistance.

The invention discloses a tungsten-containing composite piston material comprising, by weight, 5-6 parts of silicon powder, 0.6-0.9 part of magnesium powder, 0.15-0.35 part of manganese powder, 0.1-0.2 part of tungsten powder, 8-10 parts of silicon carbide powder, 4-5 parts of molybdenum disulfide, 0.6-0.8 parts of hafnium powder and 90-98 parts of aluminum powder. The invention further disclosesa preparation method of the tungsten-containing composite piston material. The preparation method comprises the step (1) of weighing raw materials; the step (2) of ball-milling, sieving and mixing thesilicon powder, the magnesium disulfide, the manganese powder, the tungsten powder, the hafnium powder and the aluminum powder; the step (3) of heating the silicon carbide powder and holding the temperature, and forming silicon dioxide on the surface layer after the silicon carbide powder reacts with oxygen fully; the step (4) of heating and degassing the mixed materials, holding the temperatureand cooling the mixed materials again, then adding the molybdenum disulfide and the silicon carbide to the mixed materials, and stirring the mixtures so that the tungsten-containing composite piston material is obtained. According to the tungsten-containing composite piston material and the preparation method thereof, by adding alloy elements with great influence on high-temperature performance and wear resistance proportionally and adjusting the proportion, the high-temperature strength and wear resistance of the materials are improved.

The invention discloses a composite piston material containing nickel which is prepared from the following raw materials in parts by weight: 4.5-5.5 parts of silicone powder, 0.4-0.48 part of magnesium powder, 0.02-0.05 part of titanium powder, 0.1-0.2 part of nickel powder, 5-6 parts of silicon carbide powder, 2.2-2.8 parts of molybdenum disulfide, 0.3-0.6 part of thulium powder and 90-95 parts of aluminum powder. The invention also discloses a preparation method of the composite piston material containing nickel. The preparation method comprises the following steps: (1) weighing raw materials; (2) ball-milling, screening and mixing the silicone powder, the magnesium powder, the titanium powder, the nickel powder, the thulium powder and the aluminum powder; (3) heating and insulating thesilicon carbide powder, and carrying out a reaction with oxygen fully to form silicon dioxide in the surface layer; and (4) heating, degassing, insualting and cooling the mixed raw materials, then adding molybdenum disulfide and silicon carbide, and stirring the mixture. By adding alloy elements which are relatively large in influence on high-temperature performance and wear resistance in a certain proportion to adjust the proportion, the high-temperature strength and wear resistance of the material are improved.

The invention discloses a lanthanum-containing composite piston material comprising, by weight, 10-13 parts of silicon powder, 1-2 parts of magnesium powder, 0.1-0.2 part of lanthanum powder, 5.2-5.8parts of silicon carbide powder, 1.2-1.8 parts of molybdenum disulfide, 0.15-0.18 part of hafnium powder and 74-84 parts of aluminum powder. The invention further discloses a preparation method of thelanthanum-containing composite piston material. The preparation method comprises the step (1) of weighing raw materials; the step (2) of ball-milling, sieving and mixing the silicon powder, the magnesium disulfide, the lanthanum powder, the hafnium powder and the aluminum powder; the step (3) of heating the silicon carbide powder and holding the temperature, and forming silicon dioxide on the surface layer after the silicon carbide powder reacts with oxygen fully; and the step (4) of heating and degassing the mixed materials, holding the temperature and cooling the mixed materials again, thenadding the molybdenum disulfide and the silicon carbide to the mixed materials, and stirring the mixtures so that the lanthanum-containing composite piston material is obtained. According to the lanthanum-containing composite piston material and the preparation method thereof, by adding alloy elements with great influence on high-temperature performance and wear resistance proportionally and adjusting the proportion, the high-temperature strength and wear resistance of the materials are improved.

The invention provides a preparation method for an aerogel composite material. The aerogel composite material is composed of an aerogel and a resin phase which is used for bonding the aerogel. The preparation method comprises the following steps: (1) mixing: uniformly mixing the aerogel with resin powder; (2) spreading: spreading a layer of a mixture obtained in the step (1) on the substrate of amold; (3) melting: rapidly heating the resin powder in the mixture obtained in the step (2) by using a laser in a step scan manner until the resin powder is molten; (4) alternate spreading and melting: alternately repeating the step (2) and the step (3) on a former deposition layer; and (5) curing. The aerogel composite material disclosed by the invention has good heat insulation performance, light transmittance, safety performance, sound insulation performance and noise reduction performance, and is applicable to the field of doors and windows, curtain wall glass, lighting roofs and the likeof green buildings, ultralow-energy-consumption buildings and near-zero-energy-consumption buildings and to the fields of artistic glass and the like.

The invention provides a badminton racket middle tube manufacturing process and a badminton racket middle tube. The badminton racket middle tube manufacturing process comprises the following steps: S1, selecting high-toughness fibers, cutting the fibers to a proper fiber length, twisting the fibers into a round rod core, soaking the round rod core in a thermosetting resin diluent, taking out the round rod core after soaking, airing the round rod core, and hardening the resin; s2, the hardened round rod core is ground to be in a true circle, and a middle tube core part is manufactured; s3, coating the core part of the middle tube with epoxy resin, and airing; s4, cutting a plurality of pieces of epoxy resin-based carbon fiber reinforced prepreg, and laying according to different angles; s5, paving the prepreg and rolling the core part of the middle pipe to obtain a middle pipe preform; s6, uniformly winding an OPP belt on the middle pipe preform, and baking to harden the middle pipe preform into a middle pipe rough blank; and S7, redundant materials of the middle pipe rough blank are cut and ground to be in a true circle, and the middle pipe is manufactured. The method has the advantages that industrial processing is facilitated, and the performance of products in each batch is uniform; the rigidity, impact resistance and bending strength of the whole middle tube can be improved, and the phenomenon that the racket head flies out due to brittle fracture of the middle tube of the racket is avoided.

The invention discloses a molded glass fiber-reinforced plastic cable bridge. The molded glass fiber-reinforced plastic cable bridge is prepared from, by weight, 50-75 parts of ABS resin, 35-55 partsof modified glass fiber complex liquid, 4-7 parts of rectorite, 3-6 parts of magnesium oxide, 3-5 parts of a curing agent, 6-12 parts of a flame retardant, 5-8 parts of an accelerating agent and 1-3 parts of an antistatic agent, wherein the preparation method of the modified glass fiber complex liquid comprises the steps of preparation of a modifying agent, preparation of a modifying agent hydrolysate and preparation of the modified glass fiber complex liquid. The preparation method comprises the specific steps that 20-50 parts of glass fibers are subjected to heat treatment, wherein accordingto the heat treatment conditions, the glass fibers are fired for 20-30 minutes at the temperature of 600 DEG C in the nitrogen atmosphere, absorbed water and impurities on the surface of the glass fibers are removed, 30-50 parts of the modifying agent hydrolysate and 8-15 parts of polyether urethane are added immediately, and evenly mixed in a high-speed mixing machine, and the modified glass fiber complex liquid is obtained. The modified glass fibers are bonded to the surface of an ABS resin matrix, low critical surface tension is obtained, and due to the low critical surface tension, the glass fiber-reinforced plastic cable bridge is high in hydrophobicity and obviously higher in corrosion resistance.

The invention discloses a preparation method of a composite adhesive special for aluminum foil lining paper, and belongs to the technical field of adhesive preparation. The method comprises the following steps: 1) mixing and fermenting bamboo fibers, biogas slurry, a glucose solution and water; 2) adding tetraethoxysilane, stirring and mixing, filtering and freezing the components, performing ballmilling on the components, sieving the material through a 300-mesh sieve, and drying and carbonizing the material to obtain modified bamboo fibers; 3) heating, stirring, mixing casein, urea and water, then adding ammonia water, stirring the mixture to dissolve all the components, then adding borax, and stirring and mixing all the components to obtain a mixed dissolving solution; 4) stirring and mixing the following components including, by weight, 30-40 parts of mixed dissolving solution, 8-10 parts of modified bamboo fiber, 3-5 parts of emulsifier, 2-3 parts of defoaming agent, 2-3 parts ofdry oil, 3-5 parts of modified additive, 2-3 parts of modified sepiolite, 2-3 parts of starch, 30-50 parts of water, 2-3 parts of shell powder, 2-3 parts of organic acid and 2-3 parts of asphalt to obtain the composite adhesive. The composite adhesive specially used for the aluminum foil lining paper has excellent flowing property and bonding property.