31results about How to "Improve electrical corrosion resistance" patented technology

The invention discloses a silver copper based metal oxide electrical contact material containing adding elements and a preparation method thereof. The electrical contact material is characterized by comprising the following components in percentage by weight: (20-50)% of silver metal oxide alloy, (0.3-9)% of electric conductive ceramics, (0.7-1.8)% of lanthanum nickel alloy, (0.7-4.9)% of adding elements, and the balance of silver copper alloy; and the contact material provided by the invention comprises the following simple substance elements in percentage by weight: (15-63)% of silver, (4-25)% of metal oxide, (0.3-9)% of electric conductive ceramics, (0.01-5)% of rear earth, (0.7-4.9)% of adding elements, and the balance of copper. The preparation method is characterized by comprising the following steps: smelting, pulverizing and milling (silver metal alloy power, and silver copper alloy powder) in proportion for optimization performances of the material, cladding electric conductive ceramic micro powder by silver, mixing powder of the adding elements in a certain mass ratio, pressing an ingot blank, sintering and extruding, rolling or drawing, thus obtaining the contact material. The electrical contact material provided by the invention has the advantages of low cost and excellent overall performance.

The invention discloses a composite material tool electrode for electrolytic deposition and electric spark and a preparation method of the composite material tool electrode, and belongs to the technical field of electrical discharge machining of electric spark. The composite material tool electrode for electrolytic deposition and electric spark is characterized by comprising, by weight, 16-18% of SiC particles, 14-16% of TiB2 particles, and the balance copper as a base body, and the SiC particles and the TiB2 particles are embedded in the base body. Due to the fact that the SiC particles and the TiB2 particles are added to the copper base body, compared with the method that only the SiC particles are added in the initial research stage, on the premise of not changing the total adding amount, the specific heat capacity of the tool electrode is improved by 10%, the coefficient of thermal expansion is lowered by 3%, the hardness is improved by 5%, and therefore the loss of the electrode under same electrical discharge machining parameters is lowered by 7%, and the roughness of a machined surface is lowered by 2%.

The invention relates to a wind self-cleaning type composite insulator, which consists of a fitting ball head, a fitting ball socket, a rod core and a composite outer sleeve. The composite insulator is characterized in that the upper surface of an umbrella skirt of the composite insulator is an arc rotary surface, and is provided with a wind cleaning ring (5), and each cleaning ring can clean to the edge of each umbrella skirt of the insulator under a general wind attitude (8), to the most of part of the upper surface of each umbrella skirt under a weak wind attitude (9), to the highest part of the upper surface and the center part of the lower surface of each umbrella skirt under a high wind attitude (10), and to the lower surface (4) of each umbrella skirt under a strong wind attitude (11). Compared with the wind cleaning ring of the existing composite insulator, the composite insulator has the advantages that the wind cleaning area is greatly increased, the anti-pollution flashover capability of the insulator is improved, the aging-resistant performance, the breakdown-resistant performance and the electrical erosion-resistant performance are higher, and the deformation of the umbrella skirts difficultly occurs.

The invention discloses a method for manufacturing a gradient composite electrode for electrical spark rough machining and electrical spark finish machining for laser solid forming and belongs to the technical field of electric discharge machining. The method comprises the steps that a three-dimensional solid model is generated by means of software, the model is sliced and layered, and the parameters of all slice layers are obtained; then, Cu-based SiC composite micro powder is sintered on a vibrating substrate by means of laser according to the shape parameter of the slice layer on the inner side; finally, Cu powder and graphite powder are sintered on a Cu-based SiC composite sediment layer in a mixing mode by means of laser according to the shape parameter of the slice layer on the outer side. The electrode manufactured through the method is provided with a gradient structure, and electricity is discharged firstly by the Cu-based graphite sediment layer located on the outer layer of the electrode so as to achieve rough machining of a workpiece; then finish machining of the workpiece is achieved by means of the Cu-based SiC composite sediment layer of the electrode. Meanwhile, the Cu-based SiC composite micro powder is formed by blowing SiC particles in molten Cu in a dispersed mode by means of nitrogen and then conducting atomization and cooling, in this way, the distribution uniformity of the SiC particles is improved, and the equilibrium of the electric corrosion resistance of the electrode is improved.

The invention discloses a high-fatigue-resistance alloy steel material for automobile crankshafts. The high-fatigue-resistance alloy steel material is composed of, by weight, 0.5%-0.8% of carbon, 1.4%-1.7% of silicon, 0.9%-1.5% of manganese, 0.6%-0.8% of zinc, 0.05%-0.07% of titanium, 0.5%-0.8% of nickel, 0.003%-0.05% of aluminum, 0.1%-0.2% of boron, 0.02%-0.05% of niobium, less than or equal to 0.015% of sulfur, less than or equal to 0.015% of phosphorus, and the balance iron and inevitable impurities. The prepared alloy steel material is excellent in comprehensive performance, and has high tensile strength and good fatigue resistance. A process method is simple, convenient to operate and suitable for industrial application and reduces cost.

The invention provides a silver-based multicomponent alloy composite solution and a method for preparing a functional coating through the silver-based multicomponent alloy composite solution. The silver-based multicomponent alloy composite solution comprises components with the following concentrations: 40-80 g/L of KAg(CN)2, 45-75 g/L of KCN, 5-50 g/L of K4P2O7.3H2O, 0.2-1.0 g/L of nickel salt (by Ni), 15-25 g/L of sodium potassium tartrate, 0.1-0.8 g/L of antimonic salt (by Sb), 0.2-2 g/L of rare earth oxide and 5-50 ml/L of cationic dispersion activator, wherein H2O serves as a solvent. The pH value of the silver-based multicomponent alloy composite solution is adjusted to range from 9 to 11. The silver consumption of the functional coating is reduced, and the cost performance of a product is improved.

The invention discloses a zirconium element doped alloy steel material. The zirconium element doped alloy steel material is prepared from, by weight percent, 0.2%-0.6% of carbon, 1.6%-2.5% of silicon, 1.0%-1.5% of manganese, 2.6%-2.8% of molybdenum, 0.3%-0.5% of boron, 0.04%-0.06% of zirconium, 0.003%-0.05% of aluminum, 0.01%-0.02% of iridium, not larger than 0.015% of sulfur, not larger than 0.015% of phosphorus and the balance iron and inevitable impurities. The prepared alloy steel material is attractive in appearance, large in rigidity, high in wear and corrosion resistance and low in cost; the preparation process is simple, and high operability is achieved; and the alloy steel material has few product defects and is worthy of popularization.