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 formula and a production technology of red brick-containing recycled aggregate permeable concrete. The permeable concrete prepared from red brick-containing recycled aggregates promotes the recycling of building wastes, is a novel environmentally-friendly material, promotes the sustainable development of the building industry, has great social, economic and environmentalcomprehensive benefits, saves a large amount of natural resources, and has significant economic and environmental benefits.

The invention discloses a forming method for an aluminum alloy multi-step large special-shaped ring. The forming method comprises the following steps: firstly, adopting drawing software to assist the preparation of an intermediate ring blank, and putting the intermediate ring blank in a ring rolling mill for rolling; during rolling, elevating a worktable top where the intermediate ring blank is located by 5mm-10mm to enable a main roller to contact with a lower end of the intermediate ring blank firstly and guarantee the filling of a die cavity with a metal material starting from bottom to top, thereby gradually completing the formation of all the steps, and then bulging the rolled multi-step large special-shaped ring. Such a method is capable of forming the multi-step large special-shaped ring, and also capable of effectively avoiding a phenomena of rib deviation or rib crossing during the formation of the multi-step large special-shaped ring, thereby improving the properties of the forging. The method is suitable for the formation of the aluminum alloy multi-step large special-shaped rings.

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 a forming method for a bearing steel multi-step large special-shaped ring. The forming method comprises the following steps: firstly, adopting drawing software to assist the preparation of an intermediate ring blank, and putting the intermediate ring blank in a ring rolling mill for rolling; during rolling, elevating a worktable top where the intermediate ring blank is located by 5mm-10mm to enable a main roller to contact with a lower end of the intermediate ring blank firstly and guarantee the filling of a die cavity with a metal material starting from bottom to top, thereby gradually completing the formation of all the steps, and then bulging the rolled multi-step large special-shaped ring. Such a method is capable of forming the multi-step large special-shaped ring, and also capable of effectively avoiding a phenomena of rib deviation or rib crossing during the formation of the multi-step large special-shaped ring, thereby improving the properties of the forging. The method is suitable for the formation of the bearing steel multi-step large special-shaped rings.

The invention discloses a forming method for a large special-shaped alpha-phase titanium alloy 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 multi-step ring piece is subjected to bulging. By means of the method, the large special-shaped multi-step ring piece can be formed, the rib deviating or rib crossing phenomenon in forming of the large special-shaped 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 alpha-phase titanium alloy multi-step ring piece.

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 for an alpha-phase titanium alloy biscuit. The upsetting method comprises the steps that an alpha-phase titanium alloy rod is firstly upset according to a conventional method, so that the deformation amount of the rod reaches 24%-32%; and then the end surfaces of a medium biscuit are subjected to partial deformation by using a special fixture. By adopting the upsetting method, the defects of a deformation dead zone and the like in a conventional upsetting method can be effectively eradicated; and the texture uniformity of the alpha-phase titanium alloy biscuit can be effectively improved, so that the performance of a forge piece is improved. The method is applicable to upsetting of the alpha-phase titanium alloy biscuit.

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.

The invention discloses an isothermal forging forming method of a 2024 aluminum matrix composite splint forge piece, which comprises the following steps of: upsetting a blank on a free forging hammer, and drawing out; the left end of the blank is controlled to be unchanged, the position a away from the left end of the blank is divided and drawn out, and then the whole blank is upset to be flat; the left end of the blank is drawn out and shaped, and an intermediate blank is manufactured; and finally, the intermediate blank is subjected to isothermal forging forming. By means of the method, forging forming of the 2024 aluminum matrix composite clamping plate forge piece can be effectively achieved, and the forming quality of the 2024 aluminum matrix composite clamping plate forge piece is improved. The method is used for isothermal forging forming of the 2024 aluminum matrix composite splint forge piece.