46results about How to "Microorganized" patented technology

The invention discloses a titanium nitride ceramic reinforced copper-based composite material and a preparation method thereof. Raw materials for the composite material comprise, by weight, titanium nitride, titanium oxide, a sintering aid and carbon black, wherein copper alloy is added into a perform. The preparation method comprises the following steps: carrying out heating, insulation, sintering and introduction of flowing nitrogen so as to obtain a porous titanium nitride perform with a porosity of 45 to 75%; preheating a die casting machine and heating the copper alloy until the copper alloy is molten; and dumping molten copper alloy liquid into a mold cavity in which the perform is disposed, pressing the molten copper alloy liquid into the porous titanium nitride perform by using a press, separating an ingot from a die after the ingot is cooled and carrying out heat treatment on the ingot so as to obtain the titanium nitride ceramic reinforced copper-based composite material. Particles in the titanium nitride ceramic reinforced copper-based composite material are mutually connected, and the composite material has the advantages of low density, high specific strength and specific stiffness, good wear resistance, excellent thermal conductivity and electroconductivity and a stable size and is extensively used in the industries like frictional wear structural members of mechanical and electrical special equipment, high temperature and corrosion resistant structural members of bearing special equipment, the aerospace industry and automobile manufacturing.

The invention discloses a Cr / N-containing high-manganese austenitic steel plate and a preparation method thereof. The Cr / N-containing high-manganese austenitic steel plate comprises the following chemical components in percentage by weight: 0.28-0.32% of C, 24.8-25.2% of Mn, 2.8-3.2% of Cr, 2.8-3.2% of Al, 0.02-0.20% of N, at most 0.015% of P, at most 0.005% of S and the balance of Fe. The preparation method comprises the following steps: smelting molten steel according to set components, casting into an ingot, heating to 1200 DEG C, keeping the temperature for 2 hours, forging into a plate blank, carrying out hot rolling until the thickness is 6mm, carrying out homogenizing treatment, carrying out cold rolling to the thickness of 1mm or so, and finally, carrying out solution treatment, thereby obtaining favorable strength-plasticity compatibility and having certain oxidation resistance and corrosion resistance.

The invention discloses a seven-element high-entropy alloy coating prepared by laser cladding and a preparation method thereof, belonging to the technical field of alloy surface coating modification; the high-entropy alloy powders are Al, Co, Cr, Fe, Mo, V, Ti . The matrix material is Ti-6Al-l4V (TC4) titanium alloy, and the atomic fraction of each raw material in the high-entropy alloy powder is Al (10%-16%), Co (11%-15%), Cr (9%-16%) ), Fe (6%-15%), Mo (8%-17%), V (8%-15%), Ti (12%-16%), the sum of all components is 100%. by CO 2 The high-energy laser beam emitted by the laser clads the configured alloy powder on the surface of the substrate to form a high-entropy alloy coating. The substrate and the cladding layer are metallurgically combined to achieve the purpose of surface modification, thereby increasing the hardness of the titanium alloy. , wear resistance and corrosion resistance, thereby extending the service life of titanium alloys.

A heat treatment method for improving the microstructure and properties of 7xxx series aluminum alloys, comprising: first performing single-stage or hierarchical solid solution heat preservation heat treatment on the deformed form, and the final solution heat treatment heat preservation temperature is T 1 , where, 460℃≤T 1 ≤485℃; the alloy is cooled at an average cooling rate V 1 by T 1 The temperature point is cooled to temperature T 2 , followed by an average cooling rate V 2 from T 2 The temperature point is cooled to room temperature, where, 150℃≤T 2 ≤190℃, 20℃ / s≤V 1 ≤60℃ / s, 3℃ / s≤V 2 ≤10°C / s; the quenched aluminum alloy is subjected to 1-5% cold deformation treatment, and then at T 3 Holding time at temperature t 1 Carry out aging heat treatment, where 110℃≤T 3 ≤140℃, 10h≤t 1 ≤32h. The method of the invention can make the 7xxx series aluminum alloy obtain a relatively ideal precipitated phase structure under the condition of controlling the residual stress, and obtain a good match between strength, toughness and corrosion resistance. Compared with the existing technology, the method greatly shortens the heat treatment time, and has the characteristics of simple operation, high efficiency and feasibility.

The invention discloses a process for preparing a semi-solid state aluminum alloy scroll plate by a radial forging strain induction method. The method comprises the following steps: pre-heating an aluminum alloy rods at first; performing radial forging on the aluminum alloy rods; performing secondary remelting on blanks subjected to radial forging; performing extrusion casting on the aluminum alloy scroll plate; performing T6 heat treatment on the aluminum alloy scroll plate acquired by extrusion casting in a semi-solid state to increase the mechanical property. According to the process, the aluminum alloy semi-solid state blanks which are uniform and free of microdefect are prepared and are subjected to extrusion casting to form a scroll plate workpiece with less microdefects and high mechanical performance, and the process is simple and easy to operate.