70results about How to "High yield limit" patented technology

The invention provides a super-soft aluminum alloy conductor and a preparation method thereof. The aluminum alloy conductor comprises the following materials in percentage by weight: 0.3 to 1.5 percent of Fe, 0.001 to 0.3 percent of Be, 0.005 to 0.6 percent of Cu, 0.1 to 1.5 percent of rare earth, less than or equal to 0.08 percent of Si, less than or equal to 0.15 percent of total inevitable impurities, and the balance of aluminum. The aluminum alloy is drawn into an aluminum alloy wire by melting, continuous casting and continuous rolling, and the aluminum alloy wire is put into an annealing furnace and annealed for 20 to 40 hours at the temperature of between 380 and 420 DEG C to form the aluminum alloy conductor, wherein the annealing is performed in a sealed heat insulation device under the protection of nitrogen. The aluminum alloy has extremely good toughness and elongation performance, the coefficient of elongation reaches or exceeds 35 percent and even can reach 40 percent, and the electric conductivity can reach 60 percent IACS.

The invention discloses a conductor wire core aluminum alloy for a welding machine cable and a making method thereof. A conductor wire core is made of aluminum alloy materials. The aluminum alloy comprises the following compositions: 0.4-1.0wt percent of Fe or Co, 0.1-0.5wt percent of Cu, 0.1-0.5wt percent of Mg, 0.05-0.1wt percent of Be and 0.05-0.1wt percent of rare earth. An aluminum alloy wire harness is obtained by carrying out smelting, linecasting, rolling, intermediate annealing, drawing, bunch stranding and annealing on the alloy. The aluminum alloy wire core has the advantages of better conductivity, anti-fatigue performance, flexibility, bending performance and corrosion resistance and is suitable for the conductor wire core of the welding machine cable.

The invention discloses a process for quenching-distribution heat treatment on 60Si2CrVA steel spring for trains. The process comprises the following steps: polishing a 60Si2CrVA steel round bar with diameter less than or equal to 50mm, and heating the steel round bar to a temperature of between 960 and 1,060 DEG C through an inductive heating mode; then, wrapping the 60Si2CrVA steel round bar into a spring in the temperature state; cooling the wrapped spring to a temperature of between 810 and 900 DEG C, quenching the spring at a temperature of between 130 and 210 DEG C, and keeping constant temperature for 10 to 60 seconds; quickly placing the spring in a medium at a temperature of between 280 and 350 DEG C, maintaining for 50 to 800 seconds, and placing the spring into water or oil for cooling; and tempering the spring at a temperature of between 250 and 470 DEG C for 60 to 120 minutes. The 60Si2CrVA steel spring product has the advantages of high yield limit and fatigue strength, good quenching harden ability, high tensile strength and yield ratio, high toughness and the like.

The invention relates to an alloy for cold-rolling worker rollers and its preparing process, wherein the alloy comprises the main chemical constituents of: C 0.9-1.2%, Si 0.85-1.25%, Mn 0.40-0.60%, Cr 2.50-5.50%, Ni 0.25-0.45%, Mo 0.25-0.45%, V 0.05-0.155 and balancing Fe.

The invention discloses a method for rolling a high-precision alloy steel wire rod. The rolling method is characterized in that a six-shelf precise rolling rack is removed on the basis of a traditional rolling technology, a six-shelf three-roller reducing sizing mill and an online diameter measurement device are adopted to freely adjust the rolling size, so that the surface quality of the final product is relatively good, and the tolerance precision of the size is relatively high, meanwhile one group of water penetration cooling devices are respectively arranged at front and rear sides of the six-shelf three-roller reducing sizing mill to realize low temperature rolling and controlled rolling and controlled cooling, so that the mechanical performance of a rolling line product can be greatly increased; the rolling method is slightly changed based on an original production line, temperature and rolling control and precision rolling of the finished size can be realized, the improvement cost is simultaneously greatly reduced, the additional value of the product is increased, and the finished product is high in precision, and thus the change from plain carbon steel to special steel can be quickly realized in a steel plant.

An efficient ultrasonic polishing apparatus for the axle-type parts is composed of a HF (200000-300000 H2) ultrasonic generator and a grinding head, and is installed to the cutting-tool carrier. Its polishing method features that the part to be polished is fixed to a lathe.

The invention discloses a manufacturing process of a solid cold-spun forged steel piston with an internal cooling oil chamber. The manufacturing process comprises the following steps: performing solid forging to obtain a piston blank; machining a semi-finished piston product with an inside part of the internal cooling oil chamber and a shielding part for blocking off the internal cooling oil chamber; then heating the shielding part, and spinning downwards the shielding part of the internal cooling oil chamber of the piston by adopting the hot spinning process so that the shielding part contacts with the inside part of the internal cooling oil chamber so as to form the complete internal cooling oil chamber; and reserving the gap between the inside part and the shielding part of the internal cooling oil chamber and the shielding part without disposal or simply closing the gap by argon-arc welding and other common welding processes, and then performing precision machining to finally obtain the finished piston. The manufacturing process has the advantages of simple structure, more simple and convenient manufacturing procedures, high production efficiency, low manufacturing cost and the like, and can meet the requirements of an engine on high power, high strength and low emission.

The invention relates to a positive pole current collector of a lithium ion battery. The current collector is of a three-layer structure, wherein the first layer and the third layer are made of aluminum and have the thickness of 2.5-3 microns; the second layer arranged between the first layer and the third layer is an aluminum alloy layer and has the thickness of 8-10 microns; and the aluminum alloy comprises the following components in percentage by mass: 0.4-0.45 percent of Si, 0.4-0.45 percent of Fe, 0.06-0.08 percent of Cu, 0.5-0.6 percent of Mn, 0.05-0.08 percent of Ca, 0.01-0.015 percent of Sb, 0.1-0.15 percent of Ti-B alloy, 0.45-0.6 percent of RE, 15-20 percent of La, 55-60 percent of Ce, 10-15 percent of Er, 10-15 percent of Sm and the balance of aluminum and inevitable impurities, wherein RE refers to mixture rare earths. The preparation method comprises the following steps: smelting, performing homogenizing treatment, cold rolling and performing two-stage aging. According to the positive pole current collector disclosed by the invention, the tensile strength can be 260-275MPa, a corrosive pitting phenomenon is avoided, and compared with an aluminum foil in the prior art, the positive pole current collector has the advantage that problems of wrinkle and breakage can be effectively solved on the basis that a certain aluminum foil thickness is guaranteed.

The invention provides a spin-forming mould for a kettle body of a sliver kettle. The spin-forming mould comprises a mould rack, a kettle body internal supporting module arranged on the mould rack, a kettle body external forming module and a kettle body closing-in and rolling module, wherein the kettle body is arranged between the kettle body internal supporting module and the kettle body external forming module; and in a rotary process of the kettle body, the kettle body closing-in and rolling module can apply pressure to the kettle body, so that the kettle body completes closing-in. According to the spin-forming mould for the kettle body of the sliver kettle, the material consumption is reduced, the labor amount of an operator is reduced and the manufacturing cost can be effectively saved, and a manufactured product is light, uniform in thickness and high in yield.

The invention discloses a preparing process of an aluminum alloy for a mobile phone shell. The aluminum alloy comprises, by weight percent, 3 to 6% of Zn, 1 to 2% of Mg, 0.5 to 2% of Cu, 0.5 to 1.5% of Si, 0.01 to 0.1% of B, 0.5 to 1% of Fe, 0.1 to 2% of Ni, 0.1 to 2% of Mo, not larger than 0.02% of Cr, not larger than 0.025% of Ti, not larger than 0.1% of Zr, 0.2 to 1% of rare earth, not larger than 0.01% of other single impurities and the balance aluminum. The aluminum alloy prepared through the process improves the preparing process of an existing aluminum alloy, on the basis of ensuring strength and machining performance of the aluminum alloy, the friction resistance properties and excellent heat conduction properties are considered, and the aluminum alloy is suitable for being used inthe mobile phone shell.

The invention discloses high-strength low-temperature lead-free welding flux and tin soldering paste thereof. According to the high-strength low-temperature lead-free welding flux and tin soldering paste thereof disclosed by the invention, an alloy element In is added into an existing Sn-Bi brazing filler metal system, and In accounts for 15%-45% in percentage by mass. In the high-strength low-temperature lead-free welding flux and tin soldering paste thereof, components are as follows in percentage by weight: 34%-36% of Sn, 38%-40% of Bi, 24%-27% of In or the balance of In, based on 100% in total. With the adoption of the technical scheme, the high-strength low-temperature lead-free welding flux and tin soldering paste thereof have the advantages of being good in bonding pad adhesion, high in welding strength, low in melting point and moderate in cost.

The invention discloses an automobile body plate aluminum alloy containing rare earths and a preparation method of the automobile body plate aluminum alloy, and belongs to the technical field of aluminum alloy preparation. The automobile body plate aluminum alloy containing rare earths comprises titanium, zinc, iron, silicon, manganese, copper, carbon, chromium, boron, magnesium, molybdenum, tungsten, vanadium, rare earth, refining agents, sodium alcohol ether sulphate, grain refinement agents and aluminum. The automobile body plate aluminum alloy containing rare earths is formed by the stepsof melting, refining, slagging, casting and the like. By means of the automobile body plate aluminum alloy containing rare earths, the tensile strength, elongation and corrosion resistance of the aluminum alloy can be improved obviously.

The invention discloses an aluminum alloy wire harness for a light automobile. The aluminum alloy wire harness for the light automobile comprises a conductor wire core and an outer layer insulating layer, wherein the conductor wire core comprises the following components of 0.2wt%-0.4wt% of V, 0.01wt%-0.3wt% of Cu+Mg, 0.001wt%-0.01wt% of Sb, 0.01wt%-0.05wt% of Ti, 0.001wt%-0.002wt% of Ag+F, 0.001wt%-0.003wt% of Zr, 0.1wt%-0.3wt% of RE, and the balance is Al; the alloy does not contain Si and Fe; Ce and La are 50% of the total amount of the RE or more; and in a wire drawing process, the conductor wire core is firstly subject to dipping in a mixed solution of potassium fluoborate and polydimethylsiloxane, intermediate annealing in a nitrogen atmosphere containing 5% oxygen concentration is carried out, and then wire drawing is carried out. According to the aluminum alloy wire harness and the preparation method, V, Ti, Ag, F and Zr are adopted as reinforcing systems and secondary smeltingis adopted, so that the elongation at break and the tensile strength of the aluminum alloy wire harness for the light automobile are improved.

The present invention provides a metal-plastic sandwich sheet and a method for the production thereof. The invention relates to a metal-plastic sandwich sheet (18) having metallic outer sheets (1a, 12a) and at least one plastic layer (1b, 12b; 18b) which is arranged between the outer sheets and is bonded integrally to the outer sheets (1a, 12a). In order to improve a sandwich sheet of this type in respect of the further-processing properties thereof, the invention proposes that at least one of the two outer sheets (1a, 12a) is formed from a metal sheet having surfaces (1*, 1**, 12*, 12**) of differing roughnesses, wherein the difference in the roughness averages is at least 0.4 [micro]m, preferably at least 0.5 [micro]m. The invention is based on the concept of manufacturing the outer sheets (1a, 12a) with a differing roughness on the top and bottom side (outer and inner face) thereof, such that it is possible to freely satisfy the respective optimum in respect of the roughness desired by the customer for the outer faces of the sandwich material and also the optimum in respect of the bond between the outer sheet (1a, 12a) and the plastic layer (1b, 12b; 18b). A method for producing such a sandwich sheet (18) is also described and claimed.

The invention provides Al-Mg aluminum alloy. The invention additionally provides a preparation method of the Al-Mg aluminum alloy. The preparation method of the Al-Mg aluminum alloy comprises the steps of a) casting aluminum alloy ingots; b) sequentially performing solid solution treatment and aging treatment on the aluminum alloy ingots, and rolling the aluminum alloy ingots after the aging treatment to obtain the aluminum alloy. The invention additionally provides an aluminum alloy cable. By selecting and controlling added elements and by adopting a proper preparation process, the aluminum alloy is enabled to have better comprehensive performance.

The invention discloses a grain refiner and application to preparation of rare earth aluminum alloy materials, and belongs to the technical field of aluminum alloy preparation. The grain refiner comprises the following raw materials in parts by weight: 10-18 parts of aluminum-nickel-manganese-copper-lanthanum alloy intermediate, and 4-9 parts of aluminum-titanium-zirconium-cerium alloy intermediates. The grain refiner is adopted to prepare the rare earth aluminum alloy materials, so that the tensile strength and the ductility of the aluminum alloy materials can be improved.

The invention discloses an automatable steel plate spring production process which comprises steps of material discharge, straightening, mechanical processing, lug coiling, thermal treatment, shot blasting, undercoating, total assembling, pre-pressing and finish coating. The process is characterized in that the step of thermal treatment comprises the following steps: a, heating a steel plate spring to Ac3 or greater at 40-50 DEG C in a heating furnace, and keeping the temperature; b, soaking the steel plate spring into a solution with 3-8% of sodium chloride and 0.1-0.3% of polyvinyl alcohol at 40-75 DEG C, introducing helium into the solution, and carrying out quenching cooling; c, carrying out spraying washing on the quenched steel plate spring, putting into an annealing furnace, heatingtill a critical temperature, keeping the temperature, and cooling to the room temperature. A special quenching medium is used in the process, and tests show that for most common steel in the market,such as 55Si2Mn, 60Si2Mn and 5SiMnVB, the process has very good hardenability, is free of pollution, free of fire, and safe to use.