34results about How to "The performance indicators meet the requirements" patented technology

The invention discloses a forming method for a large special-shaped structural steel multi-step ring piece. The forming method includes the steps that an intermediate ring billet is manufactured through the assistance of graphics software, and the intermediate ring billet is placed in a looping mill to be rolled; in the rolling process, a working table top where the intermediate ring billet is located is lifted by 5-10 mm to enable a main roller to make contact with the lower end of the intermediate ring billet firstly, and it is guaranteed that a mold cavity starts to be filled with metal materials from bottom to top to complete forming of all steps gradually; and then the rolled large special-shaped structural steel multi-step ring piece is subjected to bulging. By means of the method, the large special-shaped structural steel multi-step ring piece can be formed, the rib deviating or rib crossing phenomenon in forming of the large special-shaped structural steel multi-step ring piece can be effectively avoided, and therefore the performance of the forged piece is improved. The method is suitable for forming of the large special-shaped structural steel multi-step ring piece.

The invention discloses a large-power 100 W-9 dB attenuation sheet with an aluminum nitride ceramic substrate. The sheet comprises an aluminum nitride substrate, wherein a conductor layer is printed at the back side of the aluminum nitride substrate; a plurality of resistors and silver paste lead wires are printed at the front side of the aluminum nitride substrate; the silver paste lead wires are connected with the resistors to form an attenuation circuit; and glass protective films are printed on the resistors. The needed attenuation value is obtained by changing the size of resistance value and surface resistivity in the attenuation circuit and good stationary wave properties can be obtained through the design of the lead wires. According to the large-power 100 W-9 dB attenuation sheet with the aluminum nitride ceramic substrate provided by the invention, the area of the resistors is enlarged, the high and low temperature impact resistance of the attenuation sheet is increased and the performance indexes of products meet the requirements. Meanwhile, the quenching damages to the resistors at a high temperature when an output end is welded with the lead wires are avoided, the risk of damaging the resistors in the actual use process due to quenching the resistors is avoided, the design of the circuit is improved, the attenuation precision reaches 9+ / -0.8 dB within 3 G (Gigabyte) and the standing wave satisfies the market demand, so that the products can be applied to 3G (The 3rd Generation Telecommunication) networks.

The invention discloses high-efficiency and low-cost 610 MPa hydropower steel and a production method thereof. The hydropower steel comprises the following chemical components in percentage by mass: 0.07-0.09% of C, 0.15-0.35% of Si, 1.40-1.60% of Mn, not greater than 0.15% of P, not greater than 0.08% of S, 0.015-0.035% of Nb, 0.030-0.050% of V, 0.008-0.030% of Ti, 0.10-0.30% of Ni, 0.10-0.30% of Mo, and the balance Fe and inevitable impurities. A process route comprises KR hot metal pre-treatment, converter smelting, LF and RH refining, continuous casting, slow cooling, continuous casting blank heating, rolling, cooling, straightening, finishing and tempering. According to the high-efficiency and low-cost 610 MPa hydropower steel and the production method thereof, which are disclosed by the invention, a production flow is shortened, energy consumption is reduced, a high-cost limit of a traditional production process is overcome, and the product quality is ensured.

The invention discloses a high-stability herbicide for paddy fields, which is prepared from the following components in percentage by mass: 10 to 15 percent of pyriminobac-methyl, 10 to 12 percent of pretilachlor, 4 to 9 percent of bensulfuron methyl, 5 to 8 percent of inorganic salt, 0.2 to 0.5 percent of sodium dodecyl benzene sulfonate, 0.5 to 2.5 percent of fulvic acid, 0.5 to 1.5 percent of dispersing agent, 0.2 to 0.8 percent of antifreeze agent, 1 to 4 percent of hydrotalcite-like carrier, 0.4 to 1.2 percent of thickening agent, 0.5 to 1 percent of binding agent, 10 to 15 percent of water and the balance of oily solvent, the sum of the mass percentages of the components is 100%. The invention also discloses a preparation method of the herbicide. According to the weeding composition, pyriminobac-methyl, pretilachlor and bensulfuron methyl are used as active components, and after compounding, the pesticide resistance of weeds is slowed down through the synergistic effect of different effective components; in addition, by adding the anti-freezing agent, the thickening agent and the dispersing agent, the stability of the herbicide is improved, and it is guaranteed that all performance indexes meet the requirements within the period of validity.

The invention discloses an upsetting method of a cobalt-based high-temperature alloy cake blank. The method comprises the following steps: upsetting a cobalt-based high-temperature alloy bar by a conventional method until the deformation of the cobalt-based high-temperature alloy bar reaches 18 to 25%; partially deforming the end surface of a middle cake blank through a special tooling. With the adoption of the method, the defects such as a dead deformation area in the conventional upsetting method can be effectively removed, the structure uniformity of the cobalt-based high-temperature cake blank can be effectively improved, and thus the performance of a forge piece can be improved. The method is applied to the upsetting of the cobalt-based high-temperature alloy cake blank.