30results about How to "Meet the needs of mechanical properties" patented technology

The invention provides a biological adhesive based on epsilon-polylysine as well as a preparation method and application thereof. The adhesive is prepared from epsilon-polylysine, hyaluronic acid and water and is jointly assembled by the epsilon-polylysine and the hyaluronic acid. The biological adhesive provided by the invention has the advantages of safe and toxin-free raw materials, good biocompatibility and capability of being degraded along time; the biological adhesive can be used for replacement of suture lines of medical surgical operations and plastic and aesthetic surgeries; the product can be absorbed by body issues and does not generate toxic side effect; meanwhile, the product has proper elasticity and toughness and meets the requirements on mechanical properties by biological adhesion.

The invention belongs to the field of materials, and particularly relates to a flame-retardant heat conduction nylon composite material and a preparation method thereof. The lame-retardant heat conduction nylon composite material is prepared from, by weight, 90-150 parts of nylon-6, 30-60 parts of heat conduction filler, 10-15 parts of glass fibers, 30-70 parts of porcelain forming filler, 0.2-0.5part of coupling agent and 0.1-0.2 part of antioxidant; the heat conduction filler includes a component A and a component B; the component A is one of magnesium hydrate, magnesium oxide, zinc oxide,boron nitride and titanium dioxide or an arbitrary composition of magnesium hydrate, magnesium oxide, zinc oxide, boron nitride and titanium dioxide; the component B is boron oxide; the mass ratio ofthe component A to the component B is (4-6):1. The fire-prevention flame-retardant material capable of forming ceramic is adopted to replace traditional flame-retardant agents; when a fire disaster occurs outside, ceramic polymers can be converted into ceramic bodies with compact structures, and the situation is prevented that external flames invade and then cause combustion of internal materials.

The invention discloses a functional protection tool material used in the sports field and a preparation method of the functional protection tool material, and belongs to the technical field of protection tool materials. The functional protection tool material used in the sports field, which is disclosed by the invention, is prepared from the following raw materials in percentage by weight: 30-45% of nitrile rubber, 15-22% of natural rubber, 15-25% of polyvinyl chloride, 0.5-3% of tourmaline, 0.5-2% of germanite, 0.5-3% of hexacyclic stone, 0.5-3% of green stone, 2-5% of zinc oxide, 0.5-5% of sulfur, 2-6% of high wearing resistance carbon black, 10-20% of white carbon black, 1-3% of an accelerant, 1-3% of an anti-aging agent and 2-6% of glass fiber. The functional protection tool material used in the sports field, which is disclosed by the invention, is not only capable of meeting requirements of mechanical properties, but also is good in wearing resistance, thermal resistance, chemical stability and anti-aging property, meanwhile is capable of promoting blood circulation, and has a constant anion production function.

The invention provides a rare earth magnesium alloy, which is a modified Mg-Gd-Y-Zr rare earth magnesium alloy; the as-cast metallographic structure of the rare earth magnesium alloy has rounded edges Mg 5 Gd phase; or, the metallographic structure of the rare earth magnesium alloy in the extruded state has small particle-like precipitates; the radial size of the small particles is 10-150 nm. The invention improves the microstructure and morphology of the alloy through the method of multi-element microalloying, improves the microstructure and morphology of the alloy material by adding a specific proportion of trace Ag and Sc, and improves the effect of age hardening and grain refinement, thereby obtaining excellent room temperature and temperature. High temperature mechanical properties. On the premise of not increasing the total amount of rare earths, the present invention has high strength and performance indexes, retains good plasticity, is easy to realize engineering application, and can meet the requirements for lightweight structural materials in the current aerospace, missile military, rail transit and other fields. Requirements for mechanical properties at room temperature and high temperature.

The invention discloses a method for preparing a composite core body for an optical fiber insulator. The method comprises the following steps: 1. fixing an optical fiber isolation and protection tool in a pultrusion core mold; 2. passing an optical fiber through the fiber isolation and protection tool and pulling Extrude the core mold to wrap the optical fiber protective layer on the optical fiber; 3. Wrap the optical fiber coated with the optical fiber protective layer in the center of the glass fiber, and then lead it out from the pultruded core mold to obtain a composite core. In the present invention, the optical fiber isolation protection tool is fixed in the pultrusion core mold, and then the optical fiber protective layer is wound on the optical fiber, and then the glass fiber impregnated with epoxy resin glue is passed through, and the optical fiber coated with the optical fiber protective layer is It is clamped and fixed in the center of the glass fiber, and the optical fiber is directly implanted synchronously during the pultrusion process of the glass fiber to avoid the occurrence of fiber breakage, fiber coating damage or insulation seal failure, and protect the optical fiber to ensure that the energy of the light wave will not loss, improving the practicability of the composite core.

The invention discloses a bridge shock-absorption support. The bridge shock-absorption support successively comprises a top plate, a stainless steel plate, a polytetrafluoroethylene plate, an intermediate steel plate, a rubber block and a bottom basin, wherein the rubber block is arranged in the bottom basin, a sealing ring is arranged between the rubber block and the intermediate steel plate, therubber block comprises the following components in parts by weight: 60 to 70 parts of natural rubber, 30 to 40 parts of rare-earth cis-polybutadiene, 3 to 5 parts of zinc oxide, 1 to 3 parts of stearic acid, 1 to 2 parts of anti-aging agent, 15 to 25 parts of filler, 0.5 to 1.5 parts of microcrystalline wax, 2 to 3 parts of sulfur, 0.5 to 1 part of accelerant, 3 to 5 parts of plant extract, and 10 to 15 parts of calcium carbonate whisker. After the surface of the calcium carbonate is modified by the plant extract, the calcium carbonate whiskers can be uniformly dispersed among macromoleculesof the rubber, the glass-transition temperature of the natural rubber is shifted to a low-temperature trend, and the low-temperature application performance of the rubber block can be improved.

The invention provides a high-strength and high-toughness magnesium alloy containing Sc, which comprises the following components in mass fraction: Y: 4.5-6.5 wt%, Nd: 1.5-4.0 wt%, Gd: 1.5-4.0 wt%, Sc: 0.05 ~0.5wt%, Zr: 0.15~1.5wt%, the balance is Mg, wherein the total amount of rare earth elements does not exceed 10wt%. The high-strength and high-toughness magnesium alloy component in the present invention is Mg-Y-Nd-Gd-Sc-Zr, with the precipitation strengthening of rare earth-containing intermetallic compounds as the main strengthening mechanism, and by adding non-rare earth element Sc to improve the material of the present invention The nucleation density during solidification significantly refines the alloy structure. The material of the invention has excellent mechanical properties at room temperature and high temperature, and has higher plasticity among similar materials. The invention also provides a preparation method of the Sc-containing high-strength and high-toughness magnesium alloy.

The invention provides a mirror-faced aluminum plate strip for automobile interior parts and a preparation method thereof. The preparation steps of the aluminum material are as follows: melting and casting, homogenization and heating integrated heat treatment, hot rolling, cold rolling, mirror rolling and finished product annealing. The grain size in the metal structure of the aluminum material is fine, the texture distribution is random, and the second phase distribution is uniform. Its surface has no shading defects, showing a mirror effect, roughness ≤ 0.02μm, gloss ≥ 750GU; tensile strength 100-130MPa, yield strength ≥ 70MPa, elongation ≥ 30%. All performance indexes of the aluminum material meet the requirements for the use of automotive interior parts.

The invention relates to a high thermal conductivity and high-strength Co-Fe-Ni alloy for a mold and its additive manufacturing method. According to the weight percentage, its chemical composition is as follows: C 0-0.01%, Ni 12-18%, Fe 38-42% , Cr 0‑1.2%, X 0‑0.05%, P<0.015%, S<0.010%, the balance is Co and unavoidable impurities; where X=Sc, and / or Y, and / or Nd, and / or or Pd. Compared with the prior art, the present invention applies Co-based medium-entropy alloys to molds, utilizes additive manufacturing and subsequent heat treatment to adjust and control different strength and toughness combinations, and maintains the same level of existing mold steel without greatly increasing costs. Under the premise of mechanical properties, the thermal conductivity and service reliability of the alloy are improved, and it can replace some of the current mold steels, which has considerable economic benefits.

The invention provides a high-strength heat-resistant magnesium alloy containing Ag, which has the following components in mass fraction: Y: 4.5-6.5wt%, Nd: 1.5-4.0wt%, Gd: 1.5-4.0wt%, Ag: 0.1- 1.5wt%, Zr: 0.15-1.5w%, the balance being Mg, wherein the total amount of rare earth elements does not exceed 10wt%. The composition of the high-strength heat-resistant magnesium alloy of the present invention is Mg-Y-Nd-Gd-Ag-Zr, with the precipitation strengthening of rare earth-containing intermetallic compounds as the main strengthening mechanism, and by adding non-rare earth element Ag to form RE-Ag fine High-temperature stable phase and Mg-RE-Ag eutectic, the newly formed phase has the characteristics of fine dispersion and high-temperature stability, which significantly improves the heat treatment age hardening effect and heat resistance of the material of the present invention. The invention also provides a preparation method of the Ag-containing high-strength heat-resistant magnesium alloy.