83results about How to "Good subsequent processing performance" patented technology

The invention discloses a mullite fiber preparation method which is efficient, rapid, environment-friendly and low in cost. The method includes: taking raw materials according to stoichiometric ratio of elements in the mullite fiber chemical formula, preparing colloid, performing fiber forming and drying for colloid discharging to obtain mullite non-crystal fiber, adding the fiber into a sagger made of wave permeable materials, placing the sagger in a special microwave oven, controlling heating rate by adjusting the microwave power under the air or oxygen atmosphere, heating to a heat treatment temperature, and cooling to the room temperature to obtain the mullite fiber. The mullite fiber prepared by the method is high in impurity and low in porosity, the grain size is about 30nm, and the fiber diameter ranges from 6 micrometers to 10 micrometers. Further, the mullite fiber is excellent in uniformity, brittle fracture and chalking of the fiber are greatly reduced, yield is increased, heat treatment temperature is lowered, heat insulation time is shortened, and production efficiency is greatly improved.

The invention relates to the technical field of tanning chemistry and engineering, and provides a clean ecological cattle vamp leather water field production technology. During implementation of the clean ecological cattle vamp leather water field production technology, lime, sulfide, ammonium salt, industrial salt and a heavy metal chromium-containing material are not used, so that main tanning pollutants such as sulfide, heavy metal chromium, ammonia nitrogen, chloride ions and the like are eliminated from sources, the environment pollution is relieved, and thus good cleanness, environment friendliness and ecology are achieved; furthermore, a whole process is simple and easy to implement, the operation is convenient and simple, and the practicality is high, so that the clean ecological cattle vamp leather water field production technology is a tannery cleaner production technology suitable for popularization and industrialization; in addition, chrome-free tanned crust leather produced by the clean ecological cattle vamp leather water field production technology is detailed, compact, soft, plump and elastic, has the shrinkage temperature of above 90 DEG C, has good follow-up processing performance, and has other physical and chemical properties meeting vamp leather requirements.

The invention relates to a processing method for refining crystal grains and improving texture of double surface layers of a magnesium alloy plate strip. In the method, the magnesium alloy plate strip is arranged between at least two groups of bending rolls which are stacked up and down and staggered mutually at the temperature of between 250 and 400 DEG C; the magnesium alloy plate strip is driven to move towards one direction for at least one pass, and when passing through the bending rolls, the magnesium alloy plate strip are bent and deformed, so the magnesium alloy plate strip of which the crystal grains of the double surface layers are refined and the texture is improved is prepared. In the deformation process, large strain is accumulated on the upper and lower surface layers of the plate strip due to repeated stretching and compression, and dynamic recrystallization is induced at middle and high temperature, so that the crystal grains of the double surface layers of the plate strip are refined; and the surface layers are subjected to shear stress, so that a basal plane deflects to improve the original texture. In the method, a process design is reasonable, and equipment is simple and convenient to operate, can be matched with the conventional processing equipment for magnesium alloy, has high processing efficiency and can improve the rigidity and ductility of the double surface layers of the magnesium alloy plate strip effectively and improve the subsequent processing performance of the magnesium alloy plate strip; and large-scale industrial production is easy to realize.

The invention discloses a cleaning process for changing metal surface activity, which includes hydrocarbon cleaning, vacuum bath cleaning and drying, and vacuum gas phase cleaning process. The vacuum gas phase cleaning process is to place workpieces in it and dry The inorganic gas is introduced, and under the action of the radio frequency power supply, the inorganic gas is decomposed into high-speed ions and hits the surface of the workpiece to form a vacuum gas-phase cleaning. The vacuum gas-phase cleaning time is 180-360s, and the intake rate of the inorganic gas is 100-400mL/ minute. In the vacuum gas phase cleaning, the high-speed running ions hit the surface of the workpiece, thereby changing the surface activity of the workpiece surface, forming a rough surface invisible to the naked eye on the surface of the workpiece, which is conducive to subsequent processing, such as spraying, electroplating, anode, vacuum coating, etc., and after processing The epidermis has strong adsorption and is not easy to fall off.

The invention discloses a light high-conductivity and heat-resistant aluminum conductor and a preparation method thereof. The aluminum conductor is composed of, by weight, 0.035-0.06% of B, 0.1-0.2% of Zr, 0.1-0.3% of Er, inevitable impurities and the balance Al. The technological process comprises the steps of smelting, on-the-spot fast component analyzing, refining, rapid cooling casting, blank annealing, extruding and drawing. The added B element has the refining and modifying effects and mainly has the effect of promoting supersaturated solid solutions containing Zr and Er to separate out Al3(Er and Zr) ternary composite phases; the Al3(Er and Zr) composite phases are nano particles which are coherent with a matrix and have shell-core structures, are dispersed in the aluminum matrix and can greatly improve the electricity conductivity and the heat resistance of the aluminum conductor; the density of obtained monofilaments is smaller than or equal to 2.71 g/cm<3>, the electricity conductivity of the monofilaments is greater than or equal to 62%IACS, the short-time heat-resistance temperature of the monofilaments reaches 230 DEG C, the long-term heat-resistance temperature of the monofilaments reaches 210 DEG C, and the tensile strength of the monofilaments is greater than or equal to 165 MPa; the economic benefits are remarkable, the energy is greatly saved, and the environmental friendliness is high.

The invention discloses grain-refined manganese-lithium alloy and a method for manufacturing the same. The manganese-lithium alloy comprises, by mass, from 11.0% to 15.0% of Li, form 1.0% to 3.0% of Al, from 0.1% to 0.5% of La, lower than or equal to 0.3% of impurities and the balance manganese. The method for manufacturing the grain-refined manganese-lithium alloy includes heating a formula amount of the pure manganese, a formula amount of the pure lithium, a formula amount of the pure aluminum and a formula amount of manganese-lanthanum master alloy under conditions of vacuumizing and feeding of inert gas until the temperature reaches 720 DEG C to obtain alloy; preserving heat at the temperature of 700 DEG C after the alloy is completely melted, and allowing the alloy to stand for 15 minutes; and pouring melted alloy liquid in molds to obtain as-cast manganese-lithium alloy. The grain-refine manganese-lithium alloy contains rare earth La, structures of grains of the grain-refine manganese-lithium alloy are fine and uniform, the strength and the plasticity are improved, and the grain-refine manganese-lithium alloy is excellent in follow-up processing property, low in production cost and suitable for industrial large-scale production.

A method for liquid hydrogenation refinement of solidification structure in the process of Ti-6Al-4V alloy induction skull melting relates to a liquid hydrogenation technology in the process of titanium alloy induction skull melting. The method solves the problem of slow speed of hydrogen permeation under titanium alloy atmosphere which is only applicable to the preparation of small specimen or thin specimen, but not to wide production. The detailed procedures of the method are as follows: the charging material of Ti-6Al-4V alloy is put into the crucible of an induction skull melter, heated and melted under the environment of high-purity argon and 400-700Pa pressure; pre-coated bars with the TiH2 of the weight accounting for 0.09 to 0.2 percent of the charging material are added in; when the hydrogen-contained titanium alloy in the crucible cools and the temperature drops below 300 DEG C, the charging material is vented off and cooled until the temperature equal to room temperature. The size of the Ti-6Al-4V alloy crystallization grain after the treatment of liquid hydrogenation with the method is smaller than 800 Mu m. The method is widely applicable in preparation of titanium alloys.

The invention relates to a method for refining LA141 magnesium-lithium alloy grains. In the process of smelting, Al-5Ti-1B master alloy is added to refine the LA141 magnesium-lithium alloy grains. A cast structure of the obtained LA141 magnesium-lithium alloy is fine, and simultaneously has excellent intensity and plasticity and excellent subsequent machining performance.

The invention provides a low-density high-strength magnesium-lithium alloy and a preparation method thereof. The components and mass percentages of the magnesium-lithium alloy are: 11-15% Li, 0.5-4% Al, 0.05-0.5% Zr, 0.2~1.2%La, 0.1~0.6%Ce, the total amount of impurity elements Fe, Ni, Cu, Si≤0.2%, and the balance is Mg. The preparation method of the magnesium-lithium alloy involved in the present invention includes vacuum induction melting and plastic deformation treatment. The magnesium-lithium alloy processed by means of alloying, crystal grain refinement and deformation treatment in the present invention has high strength and plasticity under the premise of ensuring low density, and at the same time has excellent machining performance.

The invention discloses a preparation method of micro/nano structured LiFePO4 compound and the method comprises: mixing Li source, divalent iron source, phosphate, and compound(s) with molten salt effects and calcinating the mixture in an inert atmosphere at a temperature of 550 to 850 DEG C, wherein the compound(s) with molten salt effects can change into molten compound(s) at a calcination temperature. The invention also discloses the applications of the LiFePO4 compound prepared by the above preparation method and the applications of the LiFePO4 compound as lithium ion battery cathode materials. The preparation method of the present invention is simple in operation and can be used to produce products with good electrochemical performance; and moreover the materials required are of low price, therefore the method is convenient for large scale production.

The invention discloses a vehicle paint surface spraying and repairing device, and belongs to the technical field of vehicle paint repairing technologies. The vehicle paint surface spraying and repairing device comprises a shell and sealing doors, and the sealing doors are arranged at the two ends of the shell to form a closed shell with a mounting space inside. A conveying device used for conveying a vehicle is arranged at the bottom of the inner side of the shell, and the inner part of the shell is sequentially provided with a grinding area, a phosphorization area, an electrophoresis area, aspraying area and a drying area in the conveying direction of the conveying device. The grinding area is provided with a grinding mechanism, the phosphorization area is provided with a phosphorization mechanism, an electrophoresis part is arranged in the electrophoresis area, a spraying part is arranged in the spraying area, and a drying mechanism is arranged in the drying area. By arranging multiple repairing mechanisms, car paint repairing can be carried out in a sealed dust-free environment, and the paint spraying and repairing effects of a vehicle paint surface are enhanced so that the vehicle can recover the paint spraying effect obtained when the vehicle leaves a factory. The conveying device and the like are arranged, so that the repairing work is more intelligent, and the work efficiency is improved.

The invention discloses a method for producing a metal laminated composite tube, which comprises the following steps: 1)selecting a metal tube; 2)pretreating the metal tube; 3)combining a pipe fitting; 4)compacting and compositing; 5)performing plastic processing; and 6)performing post-treatment. The method has the advantages of simple production technology and equipment, high die life and low production cost, core rod size and plastic processing condition can be changed according to the practical requirement, so that the bimetallic laminated composite tube with different specification can be produced; the prepared bimetallic laminated composite tube contains a metal transition layer, metallurgy combination of bimetallic tubes can be realized, no brittle intermetallic compounds can be generated on an interface, interface combination strength and subsequent processing performance of the laminated composite tube can be increased, and the application prospect is wide.

The present invention provides a heavy oil processing method. According to the method, a fresh feed material and coking heavy oil are mixed in a fractionation tower, then enter a convection section of a heating furnace from the bottom of the fractionation tower so as to be heated, and then enter a slight thermal cracking reactor for reaction; the material discharged from the reactor returns back to a radiation section of a coking heating furnace; the material heated by the radiation section of the heating furnace is divided into two paths which enter a coke tower respectively from the upper portion (including the top portion) and the bottom portion of the coke tower for deep thermal reaction; oil gas generated from the reaction leaves from the top portion of the coke tower and enters a coking fractionation tower for fractionation; the coking heavy oil after fractionation is adopted as circulation oil and is mixed with the fresh feed material; and the obtained mixed material is discharged out of the coke tower and enters the heating furnace for continuous reaction. With such a method, the yields of dry gas and coke can be reduced; the liquid product yield can be improved; the coking of a heating furnace pipe can be slowed down; and the operation period of a coking device can be prolonged and delayed.

The invention provides a heavy oil processing process. According to the process, a fresh fed material is heated in a convection section of a heating furnace, and is subjected to a reaction in a shallow thermal cracking reactor; a material delivered from the reactor is subjected to gas-liquid separation; separated liquid-phase material is returned to a coking heating furnace and is heated; the heated liquid-phase material is divided into two parts which enter a coke tower respectively from the upper part (including the top part) and from the bottom part of the coke tower, and is subjected to deep thermal reaction; produced oil gas leaves from the top of the coke tower, and is fractionated in a coking fractionation tower; and after fractionation, a part of coking heavy oil is returned as circulation oil and is subjected to the reaction again. With the process, yields of dry gas and coke can be reduced, liquid product yield can be improved, heating furnace coking can be retarded, and coking device operation period can be prolonged.

The invention provides a method for preparing a degradable zinc alloy material by metal powder sintering. The method includes the following steps that zinc powder and metal element powder are selected; the zinc powder and the metal element powder are put into a mixing tank to be mixed on a mixing machine; mixed powder obtained after mixing is put into a planetary high-energy ball mill to be subjected to ball milling; the ball-milled mixed powder is pressed and sintered; after sintering is completed, a mixed powder blank is cooled to the room temperature, the pressure is removed, and the vacuumstate and argon protection are broken to obtain a sintered zinc alloy product; the zinc alloy sample is annealed and forged; and the forged zinc alloy is rolled or extruded to obtain the zinc alloy sheet or bar. According to the method, by adopting a powder metallurgy preparation technology, the problem of difference of melting points of alloy elements can be effectively solved, and the proportion of the elements in the alloy can be accurately controlled, so that the obtained zinc alloy material is low in oxygen content and good in quality; and besides, the preparation method is stable and can realize batch production.

The invention discloses a pressure-sensitive adhesive composite with the repulping property, which mainly comprises the following components in parts by weight: 70-89 parts of acrylic ester polymer and alkali, 9-28 parts of polyethylene glycol monomethyl ether plasticizer, 0.5-1 part of cross-linking agent, 0.2-0.5 part of antioxidant and 0-0.5 part of colorant, wherein the amount of the alkali is measured based on the molar ratio of carboxyl to be neutralized by the alkali, which accounts for 30-70 percent of the total molar ratio of the carboxyl in the acrylic ester polymer. The invention also discloses a double-sided pressure-sensitive adhesive tape prepared from the pressure-sensitive adhesive composite with the repulping property, which comprises two pressure-sensitive adhesive layers, can be used as an adhesive material, has the advantages of very strong initial stickiness and continuous stickiness, 180-degree peel strength and excellent repulping property, cannot pollute equipment in the waste paper recycling process and accords with the current requirements on environmental protection and sustainable development.

The invention discloses an extruded acryl composite cloudy-color plate and a manufacturing method thereof. A color layer of the extruded acryl composite cloudy-color plate is formed by the coextrusion of a cloudy-color layer and a cloud background layer, the cloudy-color layer and the cloud background layer are both made of ABS, UV and titanium dioxide-color master batches, a base layer of the plate is made of ABS and titanium dioxide-color master batches, and an acryl layer is made of UV and PMMA. The raw materials are dried, simultaneously extruded into a dispatcher by four plastic extruders, extruded out by a T-shaped die head, and rolled to form the extruded acryl composite cloudy-color plate. The thickness of the extruded acryl composite cloudy-color plate can be controlled within 0.8-10 mm. The extruded acryl composite cloudy-color plate has the characteristics of wide application, low density, good surface finish, high flexibility, favorable subsequent processability, stable color and pattern and the like. Compared with production by the traditional secondary casting method, the production efficiency and the mechanization degree of products are improved.

The invention relates to the technical field of tanning chemical and engineering, and provides a wet state dyeing and finishing one-bath technology for cattle instep leather. In the wet state dyeing and finishing process, the procedures of chromium retanning, neutralizing, filling retanning, dyeing, stuffing and the like are conducted in a one-bath manner, different materials act in a one-bath manner and can mutually promote seepage and diffusion, the technology process is simple, and operation is convenient and easy to achieve. Crust leather manufactured through the wet state dyeing and finishing one-bath technology for the cattle instep leather is soft and full in body and rich in elasticity, a grain surface is smooth, delicate, compact and free of a loose side, and various physical and chemical properties meet the industry requirement. Meanwhile, the wet state dyeing and finishing one-bath technology for the cattle instep leather has obvious energy saving and emission reducing benefits, waste water pollution can be greatly relieved, and the material usage amount and the water usage amount are reduced. The production time is shortened, the production cost is reduced, the production efficiency is improved, and good economic benefits and social benefits are achieved.

The invention discloses a magnesium alloy plate serving as a battery cathode and a preparation method thereof. The magnesium alloy plate consists of the following components in percentage by mass: 4.0-6.0% of Li, 0.8-1.2% of Al, less than or equal to 0.3% of impurity and the balance of magnesium. The preparation method of the magnesium alloy plate comprises the following steps of: heating pure magnesium, pure lithium and pure aluminum of the formula amount to 720 DEG C under the conditions of vacuumizing and introducing an inert gas; after the alloy is completely molten, keeping the temperature at 700 DEG C and standing for 15 minutes; then pouring the molten alloy liquid into a die to obtain a cast-state magnesium alloy; and keeping the temperature of the cast-state magnesium alloy at 380 DEG C for 3 hours, and extruding to obtain the magnesium alloy plate. The magnesium alloy plate disclosed by the invention has relatively high activity, good discharge performance, corrosion resistance and good mechanical performance, and is a magnesium cathode material with excellent performance.