5results about How to "Improve room temperature performance" patented technology

The invention provides a heat treatment-free die-casting aluminum alloy material, a preparation method and a die casting manufacturing method, and belongs to the technical field of aluminum alloy materials and casting, the die-casting aluminum alloy material comprises the following components in percentage by mass: 0.02 to 3.5 percent of Cu, 0.02 to 3.5 percent of Zn, 0.5 to 4.5 percent of Si, 1.0 to 9.0 percent of Mg, less than or equal to 0.3 percent of Fe, 0.001 to 0.06 percent of In, 0.001 to 0.06 percent of Ga, 0.04 to 0.7 percent of Mn, 0.005 to 0.35 percent of V, 0.005 to 0.35 percent of Mo, 0.02 to 0.4 percent of Zr, 0.004 to 0.07 percent of B, 0.04 to 0.7 percent of Cr, 0.02 to 0.4 percent of Ti, 0.0002 to 0.003 percent of Be, 0.02 to 0.5 percent of Sc, 0.02 to 0.5 percent of Gd, 0.02 to 0.5 percent of Dy, less than or equal the total amount of impurity elements is less than or equal to 0.20%. A component manufactured through remelting and high-pressure die casting of the die-casting aluminum alloy material has the yield strength not lower than 285 MPa, the tensile strength not lower than 340 MPa and the percentage elongation after fracture not lower than 7.0%, has excellent die-casting formability and can meet the requirement of high-pressure die-casting production of an integrated frame for a new material.

The invention discloses an Hf-Nb-Zr-V refractory high-entropy alloy and a preparation method thereof, and belongs to the technical field of metal materials. The preparation method comprises the following steps: (1) weighing Hf, Nb, Zr and V raw materials according to a designed ratio; (2) putting Hf and Nb into a copper crucible for smelting according to the sequence that the low melting point is lower and the high melting point is upper, so as to obtain an Hf-Nb pre-alloy ingot; (3) Zr and V are put into a copper crucible for smelting according to the sequence that the low melting point is lower and the high melting point is upper, and a Zr-V pre-alloy ingot is obtained; and (4) putting the Hf-Nb pre-alloy ingot in the step (2) and the Zr-V pre-alloy ingot in the step (3) into a copper crucible, and smelting in an argon environment to obtain the Hf-Nb-Zr-V refractory high-entropy alloy. According to the alloy prepared through the method, the requirement limitation of the types of composition elements of a traditional high-entropy alloy is broken through, the alloy preparation cost is reduced by reducing the types of the composition elements of the alloy, meanwhile, on the basis that the types of the composition elements of the alloy are reduced, it is still guaranteed that the alloy has the excellent room temperature performance, and the alloy application range is expanded.

The invention relates to an electrolyte, an electrochemical device and electronic equipment. The electrolyte comprises an electrolyte additive, the electrolyte additive comprises a halogenated quinoline compound, the electrolyte additive and the positive pole piece meet the following relation: 0.03 < = Ya / (L * M * N) < = 2.8, the mass percent of the electrolyte additive in the electrolyte is Ya%, the total number of the positive active material layers is L, and the sum of the mass percent of the electrolyte additive in the positive active material layers is 100%. The mass of the positive electrode active material layer in unit area on the positive electrode plate is M g / cm < 2 >, and the compaction density of the positive electrode active material layer is N g / cm < 3 >. According to the scheme provided by the invention, the halogenated quinoline compound can be used as the electrolyte additive, and the relationship between the electrolyte additive and the positive electrode active material layer is regulated and controlled, so that the electrolyte can form a stable protective film on the positive electrode and the negative electrode, and the normal-temperature and high-temperature performance of the battery is improved on the premise of ensuring the energy density of the battery.

The invention discloses a powder metallurgy injection molding preparation method capable of preparing an amorphous composite product with a complex shape. The basic preparation process comprises the steps of powder treatment, feed preparation, injection molding, degreasing and pre-sintering, hot isostatic pressing sintering and heat treatment.

The application discloses high-stickiness modified emulsified asphalt as well as a preparation method and application thereof. The high-stickiness modified emulsified asphalt comprises high-stickiness modified asphalt and a soap solution of the emulsified high-stickiness modified asphalt. The high-stickiness modified asphalt comprises, in terms of mass fractions, 35.0-45.0 parts of base asphalt, 5.0-6.0 parts of SEBS, 5.0-6.0 parts of SBR, 1.0-2.0 parts of maleic anhydride grafted wax, 1.5-2.0 parts of rubber oil and 0.1-0.2 parts of sulfur. The soap solution comprises, in terms of mass fractions, 1.0-1.5 parts of an emulsifier, 1.5-2.5 parts of phosphoric acid and 35.0-45.0 parts of water. The high-stickiness modified emulsified asphalt is prepared by optimizing raw materials and a formula, reduces the high-temperature viscosity of high-stickiness asphalt, solves the emulsification difficulty, and has corresponding improvement in normal-temperature performance and storage stability of the asphalt, thereby improving the performance of the high-stickiness modified emulsified asphalt and products.