5 results about "Single element" patented technology

The invention discloses a 10KV station electric control system of a convertor station adopting selecting 2 from 3 logic. Two PS830 boards are added, three PS830 boards are utilized to concurrently process and jointly realize a spare power automatic switching function and an operation interlocking logic function; the selecting 2 from 3 logic is added in PS853 programs of an ASI host machine and a switching value output board, i.e. the electric control system can be exported when at least two of three integrated circuit boards sends out same instructions. The damage of any one of the three PS830 boards can not lead to switch fault trip or refusing trip, the 10KV control system can be ensured to run safely and stably without being influenced by the faults of single element. The electric control system has the advantages of convenient use, safety and the like.

The utility model discloses a tool clamp for polishing small-size crystals. The tool clamp comprises a finishing ring, a polishing wandering star piece and a pressing column. The polishing wandering star piece is arranged in the finishing ring and detachably connected with the finishing ring, the outer diameter of the polishing wandering star piece is matched with the inner diameter of the finishing ring, and the polishing wandering star piece is provided with a through hole. The pressing column is arranged in the through hole, the outer diameter of the pressing column is matched with the diameter of the through hole, an inner cavity is formed in the end, making contact with the polishing disc, of the pressing column and used for containing the sample frame, the sample frame is provided with a middle hole used for containing samples, different specifications can be designed according to the samples of different sizes, and flexible and flexible use is achieved. Batch polishing of small-size crystals or glass of different specifications and different types is achieved, the polishing removal rates of single elements do not interfere with one another, and both time and effect can be controlled at will.

The invention relates to Nb-V-Ti microalloyed low-temperature-resistant high-strength high-toughness wind power pulley shaft steel and a manufacturing method thereof, and belongs to the technical field of alloy steel, the steel comprises the following chemical components in percentage by mass: 0.37-0.44% of C, 0.5-0.8% of Mn, 0.17-0.37% of Si, 0.04-0.08% of Ti, 0.06-0.14% of V, less than or equal to 0.015% of S, less than or equal to 0.015% of P, less than or equal to 0.005% of N, 0.10-0.25% of Cu, 0.6-0.9% of Cr, 0.15-0.25% of Mo, 1.25-1.65% of Ni, 0.035-0.055% of Nb and the balance of Fe and inevitable impurities, the steel is sequentially subjected to converter smelting, external refining, casting blank heating, forging and heat treatment The Nb-V-Ti composite microalloying design is adopted, the synergistic effect is achieved from the three aspects of grain boundary pinning, dynamic precipitation and solid solution strengthening, the limitation of the single element effect is broken through, grains are refined, carbide distribution is uniform, the ductile-brittle transition temperature is reduced, and the matrix strength is improved; according to the produced 40CrNiMo steel, the yield strength is larger than or equal to 905 MPa, the tensile strength is larger than or equal to 1055 MPa, the elongation is larger than or equal to 16.5%, the percentage reduction of area is larger than or equal to 42%, the impact energy at the temperature of minus 40 DEG C is larger than or equal to 48 J, and the 40CrNiMo steel has high strength and good low-temperature toughness.

The application relates to the technical field of bonding wire for semiconductor packaging, and discloses a bonding copper wire and a preparation method and application thereof. The chemical composition of the bonding copper wire includes, in terms of weight percentage: 42-48 ppm of phosphorus, 32-38 ppm of silver, 8-12 ppm of lanthanum, 8-12 ppm of yttrium, and the balance of copper; the breaking force of the bonding copper wire is greater than or equal to 7.5 cN, the elongation rate is 11.0%-15%, and the reliability is greater than or equal to 300 cycles. The application adds 8-12 ppm of lanthanum elements, 8-12 ppm of yttrium elements, 32-38 ppm of silver elements and 42-48 ppm of phosphorus elements in the bonding copper wire, and the multiple micro-alloying has a synergistic effect, can play a better corrosion-resistant welding effect than single elements, and improves the comprehensive performance of the alloy.

The invention relates to the field of nickel alloy forgings, in particular to a high-temperature-creep-resistant nickel alloy forgings and a preparation method thereof. The high-temperature-creep-resistant nickel alloy forge piece comprises a plurality of main strengthening elements, a synergistic regulation gamma'phase precipitation element and a synergistic purification grain boundary element. The main strengthening elements comprise multiple of Re, W and Mo, the synergistic regulation gamma'phase precipitation elements comprise at least one of Ta and Ti, and the synergistic purification grain boundary elements comprise at least one of Y and Hf. According to the method, the specific ranges of main strengthening elements, cooperative regulation and control of gamma'phase precipitation elements and cooperative purification of grain boundary elements are defined, and a foundation is laid for follow-up component proportion optimization and process adaptation. The method breaks through the traditional idea of adding a single element, emphasizes the synergistic effect of each functional element group, realizes the full-dimensional performance improvement of'strengthening-regulating-purifying 'through the synergistic cooperation of multiple element groups, and effectively makes up for the shortages of scattered component design and poor synergism in the prior art.