39results about How to "Satisfactory mechanical property" patented technology

A battery pack for supplying power to an electrical appliance, in particular a power tool, has a housing which at least partly comprises plastic and holds at least one battery cell, wherein the plastic is a polyethylene (PE) with a density of more than 0.93 g/cm³

An electric article, particularly an electric cable or an accessory thereof, such as a cable joint or a cable termination, includes at least one element made from a semiconductive polymeric material, wherein the at least one element is obtained by crosslinking a semiconductive polymeric composition including: (a) at least one elastomeric polymer; (b) a filler mixture including: (i) at least one first carbon black having a dibutyl phthalate (DBP) absorption number of from 250 to 600 ml/100 g; (ii) at least one second carbon black, different from the first one, having a dibutyl phthalate (DBP) absorption number of from 80 to 250 ml/100 g; and (c) at least one graphite having a specific surface area, measured according to the BET method, not higher than 20 m²/g.

This invention is aimed at providing a cold working die steel successfully reduced in the hardness, and increased in readiness in the cold workability (forging, pressing and so forth) and machinability (milling, drilling, endmilling processing, grinding and lathe turning). A cold working die steel aimed at solving the above-described subject consists essentially of, in % by mass, 0.6%≦C≦1.60%, 0.10%≦Si≦1.20%, 0.10%≦Mn≦0.60%, 5.5%≦Cr≦13.0%, 0.80%≦Mo+0.5W≦2.10%, 0.10%≦V≦0.40%, 0.0002%≦O≦0.0080%, 0.001%≦A1≦0.10%, and the balance of Fe and inevitable impurities; has transformation point Ar3 in the range from 750° C. to 850° C., with both ends inclusive; has a mean circle-equivalent diameter of a carbide, which belongs to a circle-equivalent diameter range from 0.1 μm to 3 μm observed in a section of a structure obtained after spherodizing a sample that was heated at a temperature of (Ar3+50° C.) or above and 1,050° C. or below, of 0.25 μm to 0.8 μm, with both ends inclusive; has a Brinell hardness attained after the spherodizing of HB179 to HB235, with both ends inclusive; has a steel cleanliness of (dB+dC)60×400 in the group C inclusion and the group B inclusion specified by JIS G0555 of 0.05% or less; and has a K value defined as Cr(%)−6.8×C(%) of 0.1 to 3.5, both ends inclusive.

A process for dereticulating a cross-linked polymeric material, such as cross-linked polyethylene from scraps of electric cable coatings or from unused cable coatings through a mechanical mixing cycle, wherein the cross-linked material is subjected to a specific power per mass unit such as to induce shear stresses in the material itself and temperatures higher than pre-established minimum levels. At the end of this cycle the material goes back to a thermoplastic state that may be substantially regarded as thermoplastic; then, following granulation, cooling, drying and sacking, the material will be ready for re-use, either alone or mixed with virgin polymers, according to usual operating technologies for thermoplastic materials. Eventually, the mechanical mixing cycle may be preceeded by a preliminary crushing cycle of the cross-linked polymeric materials to be treated. Preferably, the mixing cycle is carried out in a twin-screw extruder with special screw and temperature profiles.

The present invention concerns preforms made with a new intermediate material composed of a unidirectional layer of carbon fibers with a weight of 100 to 280 g/m², associated on each of its faces, with a web of thermoplastic fibers having a thickness of 0.5 to 50 microns, preferably 3 to 35 microns, the intermediate material having a total thickness of 80 to 380 microns, preferably from 90 to 320 microns, and a process for manufacturing composite parts from such preforms and the resulting composite parts.

A magnesium alloy is provided which does not contain a rare earth and which achieves, in a high-temperature region of about 200° C., both satisfactory mechanical properties and thermal conductivity. A magnesium alloy including Mg, Ca, Al and Si,

• • where a content of Ca is less than 9.0 mass %,
  • a content of Al is equal to or snore than 0.5 mass % but less than 5.7 mass %,
  • a content of Si is equal to or less than 1.3 mass % and Al+8Ca≧20.5%.

A flow body for an aircraft, in particular for a wing leading edge device, is proposed, the flow body having a curved front skin having a leading edge and at least one trailing-edge component coupled with at least one spanwise edge of the front skin, wherein the trailing-edge component comprises a constant cross-sectional profile that tapers in a chordwise direction to form two spanwise flow surfaces that end in a trailing edge, and wherein the trailing-edge component is designed for providing a flush transition between the front skin and at least one of the two spanwise flow surfaces.

Steel, characterized in that the composition thereof is, in percentages by weight:

• • C=0.20-0.30%
  • Co=trace levels-1%
  • Cr=2-5%
  • Al=1-2%
  • Mo+W/2=1-4%
  • V=trace levels-0.3%
  • Nb=trace levels-0.1%
  • B=trace levels-30 ppm
  • Ni=11-16% with Ni≧7+3.5 Al
  • Si=trace levels-1.0%
  • Mn=trace levels-2.0%
  • Ca=trace levels-20 ppm
  • rare earths=trace levels-100 ppm
  • if N≦10 ppm, Ti+Zr/2=trace levels-100 ppm with Ti+Zr/2≦10 N
  • if 10 ppm<N≦20 ppm, Ti+Zr/2=trace levels-150 ppm
  • O=trace levels-50 ppm
  • N=trace levels-20 ppm
  • S=trace levels-20 ppm
  • Cu=trace levels-1%
  • P=trace levels-200 ppm

the remainder being iron and inevitable impurities resulting from the production operation.

Method of producing a component from this steel and a component obtained in this manner.

A nanomaterial-biomass fiber composite and preparation method thereof. The biomass fibers are cut or sliced, and then dried. The dried biomass fibers are mixed with a nanomaterial and conveyed to the preheating cylinder of a defibrator for cooking treatment. The cooked mixture is pushed between the grinding discs of the defibrator for hot grinding treatment. The resulting material is then hot pressed to obtain the nanomaterial-biomass fiber composite material. The preparation method benefits from simple operation, low cost, low energy consumption, suitability for industrialized production, and wide application prospect in the field of production of binderless fiberboard.

An electrical apparatus for breaking an electric current includes an electrical arc extinguishing chamber, for extinguishing an electrical arc formed on the separation of electric contacts, provided with an extinguishing gas exhaust orifice and an extinguishing gas filtration system, placed at the output of the exhaust orifice and including a filter and a gas diffusor. The gas diffuser includes, superposed between them, a central layer and two outer layers arranged on either side of the central layer. The central layer is provided with first through holes. Each outer layer is provided with second through holes. The first holes are misaligned relative to the second holes so that each of the second holes emerges on a solid portion of the central layer without any first hole.

A method of making an object from a data file and a light polymerizable resin by additive manufacturing includes the steps of: (a) optionally modifying the data file to add additional vacuum cycling nucleation (VCN) nucleation sites to surfaces of the object (2A); (b) producing the object from the data file and the resin by light polymerization in an additive manufacturing process (3), optionally under conditions in which additional VCN nucleation sites are added to surfaces of the object, the object having residual resin adhered to the surface thereof; and then (c) cleaning the residual resin from the object with a wash liquid by vacuum cycling nucleation (4).