60results about How to "Guaranteed machinability" patented technology

The invention discloses a high-strength and high-conductivity CuCrZrMg series copper alloy wire. The high-strength and high-conductivity CuCrZrMg series copper alloy wire comprises the following components in percentage by mass: 1.5-15.0% of Cr, 0.1-2.5% of Zr, 0.05-1.0% of Mg and the balance being copper and inevitable impurities. In addition, the invention also discloses a preparation method ofthe high-strength and high-conductivity CuCrZrMg series copper alloy wire. The preparation method comprises the following steps: step one. carrying out fusion casting to obtain an ingot casting; steptwo. carrying out surface treatment and homogenization treatment on the ingot casting; step three. carrying out cold forging to obtain a bar, and then carrying out cold rotary forging to obtain a wire bar; and step four. drawing the wire bar to obtain the wire, and carrying out ageing treatment on the wire. The high-strength and high-conductivity CuCrZrMg series copper alloy wire has the beneficial effects that the wire is reasonable in design of the alloy components, high in alloying degree, appropriate in production cost, controllable in technology and environmentally-friendly and has highalloy strength and high electrical conductivity; and the high tensile strength and the high electrical conductivity can meet the requirements of high current connectors, electric power, machinery andelectronics and the like on high-strength and high-conductivity materials.

The invention discloses a sample adding needle for preparing micro-droplets. The sample adding needle comprises a liquid storage part and a liquid discharge part which are integrally formed in an injection molding mode and are communicated with each other, the liquid storage part is a circular truncated cone with the radial size gradually decreased in the direction towards the liquid discharge part, and the liquid discharge part is a circular truncated cone with the radial size gradually decreased in the direction away from the liquid storage part. The taper of the liquid storage part is C1, the taper of the liquid discharge part is C2, and C1 is smaller than or equal to C2. The wall thickness of the liquid storage part is D1, the wall thickness of the liquid discharge part is D2, and D1 is greater than D2. According to the sample adding needle for preparing micro-droplets, when the micro-droplets are prepared through the sample adding needle, the sample adding needle does periodic reciprocating motion with changed speed in oily liquid, so that the sample solution is subjected to periodic shearing force of the oily liquid at a liquid discharge opening, further, the sample solutionin the sample adding needle enters the oily liquid, and the generation of micro-droplets with uniform size and controllable volume is realized.

A glass mould material of the alloy cast iron and a preparation method thereof belong to the technical field of the glass mould material. The mould material comprises the following chemical components by weight percent: 3.49-3.65% of carbon, 1.9-2.1% of silicon, 1-1.3% of nickel, 0.5-0.7% of manganese, less than 0.16% of sulfur, less than 0.3% of phosphorus, less than 0.08% of titanium, 0.36-0.5%of molybdenum, 0.36-0.6% of chromium, less than 0.05% of vanadium, less than 1% of copper, less than 0.02% of rhenium and the balance iron. By using the technical scheme, as the selection of chemicalelements and the element contents are reasonable, the alloy cast can has ideal oxidation resistance, heat dissipation performance and fatigue resistance and fine austenite grains and the generation of D-type graphite can be improved so as to increase the heat dissipation performance of the product; by using the preparation method provided by the invention, D-type graphite can be generated, the heat dissipation performance of the product can be ensured, and metal elements can be uniformly distributed in the matrix through solid solution, thus preventing metal elements from returning to the outside of the matrix and forming alloy carbide, and ensuring the machinability of the mould.

The invention opened a preparing method of the cellulose fibre spinning stock solution. The solvent is the intermixture of the [BMIM]Cl and the [BMIM]BF4. The cellulose dissolves in the solvent after breaking up to get the uniform and transparent liquid. So it can save the energy, decrease the pollution and improve the quality of the stock solution.

The present invention provides a positive electrode slurry for manufacturing a positive electrode for a lithium secondary battery, a method for manufacturing the positive electrode slurry, a positiveelectrode for a secondary battery, and a secondary battery, the positive electrode slurry comprising a positive electrode active material, a conductive material, a binder, an overcharge prevention agent, oxalic acid, and a solvent, wherein 1 to 2 parts by weight of the overcharge prevention agent is included when the total solids weight of the positive electrode active material, conductive material, and binder of the positive electrode slurry is 100, 0.1 to 0.7 parts by weight of oxalic acid is included when the total solids weight of the positive electrode active material, conductive material, and binder of the positive electrode slurry is 100, and the positive electrode slurry has a viscosity of 4000 to 15000 cp at room temperature.

The invention discloses an ultra-thin flexible circuit board blind hole machining method. A raw material is a double-face flexible circuit board which comprises a face A flexible circuit board body, a face B flexible circuit board body and an insulating film attached to the position between the face A flexible circuit board body and the face B flexible circuit board body. The machining method includes the following steps of (1) punching the face B flexible circuit board body and (2) punching the face A flexible circuit board body. During single-face blind hole machining, double-face blind hole machining and machining of a product with a copper thickness of 12 micrometers or smaller than 12 micrometers, good machining performance and quality guarantee can be guaranteed during laser machining or other manufacturing procedures, and accordingly machinability of the product is guaranteed; reliability and the yield of the product can be greatly improved, and manufacturing cost is reduced.