5 results about "Cold hardening" patented technology

The invention relates to the technical field of master batch production equipment, in particular to a plastic extruder mixing device, which is used between the downstream of at least two parallel extruders and the upstream of a final cooling device, and is sequentially provided with a primary cooling hardening device, a splitting device, a first heating device and a hemp flower twisting device from the upstream to the downstream, the primary cooling hardening device can preliminarily harden the surface layers of plastic strips extruded by the multiple extruders, the splitting device and the hemp flower twisting device can twist the multiple plastic strips into one twisted strip, and the first heating device can soften the plastic strips between the splitting device and the hemp flower twisting device. According to the scheme, a plurality of plastic strips are subjected to controlled cooling, guiding, re-softening and twisting processes before and after being mixed, so that the risks of adhesion and skin damage of the plastic strips in the subsequent conveying and mixing processes are reduced; and the fried dough twist is not easy to break in the fried dough twist twisting process, and fried dough twist strips with uniform structures can be formed more easily.

The invention relates to a surface treatment method of an aluminum alloy material, and belongs to the field of metal surface treatment. The treatment method comprises the following steps: S1, cleaning the surface, and removing oil stains; s2, shot peening strengthening; s3, oxide skin, burrs, metal filings and oil stains on the surface of the workpiece are removed; s4, carrying out micro-arc oxidation treatment; and S5, cleaning and drying. According to the method, firstly, shot peening strengthening is conducted, the surface of a metal workpiece is repeatedly impacted through a large number of shots moving at a high speed, a metal surface layer and a secondary surface layer are subjected to plastic deformation to a certain degree, specific cold hardening of metal occurs, meanwhile, a residual compressive stress field with a certain depth is introduced, and the surface structure is refined. According to the surface treatment method of the aluminum alloy material, shot blasting treatment is added before micro-arc oxidation, residual compressive stress and a refined structure are introduced into the surface layer, and the corrosion resistance of the aluminum alloy can be improved.

The subject of the application is a fluid for cold hardening of steel, containing 81.5% - 92.4% (m / m) of wax - modified jojoba oil, with a kinematic viscosity at 40°C of 20.5 - 26.5 mm2 / s and a pour point from -5°C to 3°C, which is characterized by a distillation range such that less than 5% V / V distils up to 395°C and at least 95% V / V distils up to 590°C, furthermore, the fluid for cold hardening of steel contains two packages of refining additives in the amount of: a) 2.2% - 7.3% (m / m) of a package of refining additives containing, calculated on the total weight of this package, 10% - 25% (m / m) of bis(nonylphenyl)amine and 1% - 5% (m / m) of calcium salts (C10-C47)-alkyl-aryl derivatives of petroleum-derived benzenesulfonic acids and 0.1% - 0.25% (mim) diphenylamine and 0.01% - 0.25% (m / m) branched dodecylphenol, dissolved in mineral base oil, the content of which in the package is from 20% to 50% (m / m), b) 0.2% - 7,6% (m / m) of a package of improvers containing, based on the total weight of this package, a mixture of 70% (m / m) of hydrocarbon resins with 30% (m / m) of non-aromatic hydrocarbons obtained from vacuum residue after distillation of crude oil or by separating raffinate - oil in the process of deasphalting of vacuum residue, and in addition to the above-mentioned components contains 3 improvers with different functions in the amounts of c) 1.9% - 6.3% (m / m) of an antioxidant additive containing, 50% - 100% (m / m) of branched bis(nonylphenyl)amine and 0.25% - 1% (m / m) of diphenylamine, d) 1.4% - 5.2% (m / m) of an ash-free dispersant, of the mono- and / or bis-polybutenesuccinimides, with a base number of not more than 18 mg KOH / g and a viscosity at 100°C of not more than 330 mm2 / s, e) 0.2% - 4.5% (m / m) of modified lanolin with a kinematic viscosity at 100°C of 28.5 - 35.7 mm2 / s and a pour point of 2°C - 16°C, which is characterised by a distillation range such that,that less than 5% V / V distils to 458°C and at least 95% V / V distils to 645°C.,

The utility model relates to the technical field of machining, in particular to a chilled roller production polishing device which can measure the roughness of the surface of a roller through a measuring mechanism in the roller polishing process, reduces dependence on experience of workers and is high in reliability and practicability. Comprising a baseplate; the device further comprises a clamping mechanism, a grinding mechanism and a measuring mechanism, the clamping mechanism is installed on the bottom plate, the clamping mechanism has a clamping and fixing function, the measuring mechanism is installed on the bottom plate, the measuring mechanism has a measuring function, the grinding mechanism is located above the clamping mechanism, and the grinding mechanism has a grinding function.

The application relates to the technical field of sealing detection, and discloses an LNG (Liquefied Natural Gas) flange leakage intelligent detection method, which comprises the following steps: firstly, obtaining flange temperature strain data through a preset sensing array and calculating a time change rate and a spatial gradient vector; then, calculating a hardening coefficient and an elastic hysteresis phase angle for a cryogenic working condition, realizing time phase synchronous compensation of strain characteristics; simultaneously, calculating an anisotropy compensation coefficient by using initial reference strain, and performing direction correction on a strain propagation path affected by a pre-tightening force; on the basis, carrying out nonlinear fusion on the processed temperature strain characteristics, reconstructing a cold impact coupling energy flux, and further inverting a physical propagation speed vector of a leakage cold front; and finally, completing leakage research and judgment in combination with a dynamic alarm threshold generated by full-network strain distribution. The scheme effectively solves technical problems such as marine dynamic stress interference, material cryogenic hardening hysteresis and signal energy dispersion, and significantly improves the precision of micro-leakage detection.