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68results about How to "Irregular shape" patented technology

Manufacturing method for diesel engine exhaust valve upper seat

The invention discloses a manufacturing method for a diesel engine exhaust valve upper seat. The manufacturing method comprises the steps of processing a center hole after workblank polishing; drawing every horizontal curve, every round line and every lug processing line; processing inner holes at one end with a small diameter after correction; milling every excircle lug; enabling the inner holes at the end with the small diameter to be located through cylinder ejector pins, adjusting tooling screws to be aligned with the round lines at one end with a large diameter, first enabling a cutter retracting groove hole to undergo rough turning to be smooth, and then using a dill and a forming drill to process the inner holes and a cutter retracting groove; performing lineation and adjustment on excircles at one end with the large diameter; processing a process screw hole; performing high-pressure pumping pressure and low-pressure pumping pressure on a workpiece; processing small holes; performing finish machining on every inner hole and every excircle after pouring fusible alloy; processing locating pins; processing every hole on the side; performing deburring, and honing the inner holes; cleaning parts, and performing rust prevention treatment and inspection. The manufacturing method can effectively improve product processing quality and efficiency.
Owner:KUNSHAN JIANGJIN MACHINERY

Method for preparing diantimony trioxide nano-particles by mechanochemical modification technology

The invention relates to a method for preparing diantimony trioxide nano-particles by a mechanochemical modification technology. The method comprises the following steps: (1) mixing and ball-milling micrometer diantimony trioxide, small hard alloy steel balls and distilled water to obtain nano-Sb2O3 particles; (2) washing, drying and sieving the nano-Sb2O3 particles to obtain a nano-Sb2O3 sample;(3) mixing the nano-Sb2O3 sample, small hard alloy steel balls and distilled water, adjusting the pH value, adding hexadecyltrimethylammonium bromide, carrying out ball milling, and cleaning, filtering and drying the obtained mixture to obtain cationic surfactant CTAB modified nano-Sb2O3 particles; (4) adding the cationic surfactant CTAB modified nano-Sb2O3 particles into an ethanol-water solution, and carrying out ultrasonic dispersion so as to obtain cationic surfactant CTAB modified nano-Sb2O3 particles; and (5) mixing and ball-milling the cationic surfactant CTAB modified nano-Sb2O3 particles, a silane coupling agent KH580, small hard alloy steel balls and anhydrous ethanol, and cleaning, filtering and drying the obtained mixture to obtain CTAB and KH580 compounded modified nano-Sb2O3.The method has the advantages of simple process, high yield, high operability, and easiness in realization of industrial production.
Owner:LANZHOU UNIVERSITY OF TECHNOLOGY +1

Polycrystalline diamond catalyst and thermal treatment process thereof

InactiveCN103949269AChange grain structureIncreased Synthetic Contact RangeUltra-high pressure processesCatalyst activation/preparationSurface oxidationManganese
The invention discloses a polycrystalline diamond catalyst and a thermal treatment process thereof. The polycrystalline diamond catalyst comprises the following chemical components in percentage by weight: 3-4 percent of cobalt, 27-34 percent of iron, 27-31 percent of manganese, 18-22 percent of nickel, 13-17 percent of silicon and 3-4 percent of carbon. The catalyst is thermally treated for certain time at certain temperature to form a novel catalyst. The polycrystalline diamond catalyst and the thermal treatment process thereof have the beneficial effects that after the catalyst is thermally treated, the surface of the catalyst is roughened by oxidization, a grain structure of the catalyst is changed, and the synthesis contact range of the catalyst is widened; the catalyst treated by using the thermal treatment process has the advantages of wide synthesis pressure range, wide synthesis temperature range, high yield per unit, short time and controllability of the synthesis process when being used for synthesizing polycrystalline diamond; the synthesized polycrystalline diamond is irregularly shaped, has the rough surface and few impurities, is dark green, and is excellent in self-sharpening capacity and high in thermal stability.
Owner:HENAN FAMOUS DIAMOND IND CO LTD

Method for compounding high-quality low-oxygen low-iron aluminium nitride powder

The invention relates to a method for compounding high-quality low-oxygen low-iron aluminium nitride powder, which comprises steps: aluminite powder, aluminium nitride and ammonium salt are uniformly mixed to obtain a mixture according to quality radio of (5-10): (10-40), the mixture is uniformly spread into an aluminium nitride ceramic saggar, then carbon power is uniformly spread on the surface layer of the mixture, the quality radio of the aluminite powder and the carbon powder is 60:1-180:1, a reactor is vacuumized to 1*10-4MPa through a vacuum pump, the aluminium nitride ceramic saggar which is filled with materials is put into a reactor cavity, nitrogen which is pretreated is pumped into the aluminium nitride ceramic saggar for 15-30 min in 5-8MPa, and fully diffuses to contact with the aluminite powder, is compounded in a self-propagating mode by being ignited to obtain a reactant, and the reactant is the high-quality low-oxygen low-iron aluminium nitride powder after being cooled. The method for compounding high-quality low-oxygen low-iron aluminium nitride powder breaks down reaction barriers to fully diffuse by adding the carbon power, vacuumizing the reactor in advance, treating nitrogen, pumping the nitrogen into the reactor in advance and keeping the nitrogen in high pressure for 15-30min, and is low in energy consumption, high in efficiency and obvious in oxygen removal effect.
Owner:烟台同立高科新材料股份有限公司

A kind of composite material of high-entropy alloy holding abrasive particles and its preparation method and application

The invention relates to a composite material of a high-entropy alloy holding abrasive particle as well as a preparation method and application thereof, and belongs to the technical field of high-entropy alloy application. The high-entropy alloy holds the abrasive particle in a tyre body form. The high-entropy alloy is prepared from the following ingredients through being metered by atomic percentage: 10 to 30 percent of Fe, 10 to 30 percent of Co, 10 to 30 percent of Cr, 10 to 30 percent of Ni, 10 to 30 percent of Cu and 0 to 8 percent of Mo. The preparation method is characterized in that after the high-entropy alloy raw material powder is prepared and taken according to the designed ingredients, high-entropy alloy powder is prepared by a gas atomization method and a mechanical alloyingmethod; then, a SPS process is combined; the composite material with excellent performance is obtained. The composite material is particularly suitable for being used for manufacturing a cutter head.The high-entropy alloy is used as a tyre body for holding abrasive particles for the first time; the ingredient design is reasonable; the preparation process is scientific and controllable; the performance of the product is excellent; the large-scale industrial application is convenient.
Owner:江西咏泰粉末冶金有限公司
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