39results about How to "Improve forming ability" patented technology

The invention belongs to the technical field of high-strength steel production, and relates to a method for producing high-strength steel with yield strength of 600MPa level. The high-strength steel is smelted by a converter or an electric furnace; and after the molten steel components are qualified, the molten steel components are delivered to an LF furnace to carry out refining for the molten steel and fine adjustment for the components, wherein the steel comprises the following components in percentage by mass: 0.03 to 0.08 percent of C, 0.20 to 0.50 percent of Si, 1.0 to 1.5 percent of Mn, 0.06 to 0.10 percent of Ti, 0.02 to 0.08 percent of Nb, 0.02 to 0.06 percent of Al, less than or equal to 0.008 percent of limited element S, less than or equal to 0.008 percent of N, less than or equal to 0.04 percent of P, and the balance of Fe. The method adopts a thin slab blank to continuously cast the steel, the charging temperature of a casting blank is between 950 and 1,050 DEG C, the heating temperature is more than or equal to 1,150 DEG C, the discharging temperature is between 1,080 and 1,160 DEG C, the final rolling temperature is between 820 and 920 DEG C, and after laminar cooling, the rolling temperature is between 550 and 650 DEG C. The yield strength of the high-strength steel produced by the method is in a range of 590MPa to 660MPa, the high-strength steel has good forming property and welding property at the same time, and the thickness of a plate is in a range of 1.4 to 9.0 millimeters. By applying the method, the metallurgical components of the steel are simple, the alloying cost is low, and the process is simple and easy to control.

The invention discloses a high-energy-rate pulse impact hydraulic-forming method and belongs to the field of high-speed formation of materials. According to the high-energy-rate pulse impact hydraulic-forming method, the advantages of high-speed impact forming and the advantages of pulse hydraulic forming are combined, and an impact body which moves at a high speed impacts liquid media repeatedly to complete incremental forming of a part. According to the process of each time of impacting, an impact power source drives the impact body to move at a high speed, the impact body which moves at a high speed impacts the liquid media, the kinetic energy of the impact body is instantly converted into the pressure energy of the liquid media, and thus rapid deformation of a workpiece is completed. According to the method, the overall output energy can be controlled accurately, so that the energy transmission rate, namely energy used for workpiece forming, is controlled accurately, and the required part shape is obtained through multiple times of pulse impact; the deformation of each pass can be controlled accurately, the forming time is short, the strain rate of materials is high (10<3>s<1->-10<4>s<-1>), the forming limit of the materials can be increased, and the mold attaching effect is good; and the high-energy-rate pulse impact hydraulic-forming method can be used for precise formation of magnesium alloy, aluminum alloy, titanium alloy and other alloys difficult to deform.

The invention belongs to the manufacturing technology of metal materials, and relates to a magnesium metal plate capable of being quickly rolled and formed and a rolling method of the magnesium metal plate. Zn and Er are selected as main alloying elements, the additive amount of Zn is 0-5.0 wt%, the additive amount of Er is 0-1.0 wt%, the sum of the mass percents of Zn and Er is not smaller than 0.5% and not larger than 5.0%, and Mg serves as the balance. The high-temperature rolling temperature interval ranges from 350 to 500 DEG C, and deformation of each pass is 25%-35%. The low-temperature rolling temperature interval ranges from 250 to 350 DEG C and does not include 350 DEG C, and deformation of each pass is 10%-25%. The accumulated deformation of high-temperature rolling and low-temperature rolling is not smaller than 80%. The plate is smooth in surface and edge and free of cracking, and is a metal material of the plate capable of being quickly rolled and formed.

The invention discloses a vacuum die-casting die and method for an amorphous alloy flexible gear of a harmonic reducer. The vacuum die-casting die comprises a vacuum box, a bottom plate, square iron,a male die plate, a male die core, a female die plate, a female die core, a sprue bush, a core-pulling assembly and an ejection mechanism, wherein the bottom plate, the square iron, the male die plate, the male die core, the female die plate, the female die core, the sprue bush, the core-pulling assembly and the ejection mechanism are arranged in the vacuum box body. The vacuum die-casting methodis simple in step and easy to achieve; an amorphous alloy material of a Zr-based system is reasonably selected for die casting, fluidity is good, the pouring temperature is low, and the forming capacity is high; and the whole die is placed in a vacuum environment in a matched manner, and it is effectively guaranteed that the amorphous alloy material cannot be easily oxidized or crystallized in thedie casting process. The vacuum die-casting die is reasonable in structure, the manufactured flexible gear has better surface smoothness and dimensional precision, only a small number of post-processing procedures are needed in the subsequent process, the production period is greatly shortened, the machining cost is reduced, in addition, the yield strength and fatigue strength are higher, and theservice life is long.

The invention provides a fender structure for a vehicle and an assembling method thereof, and relates to the fender structure. The fender structure comprises an outer plate skin part and a reinforcing structure part, wherein the outer plate skin part is used for shielding a wheel of the vehicle and made of SMC materials through mold pressing; and the reinforcing structure part is used for enhancing the mechanical property of the outer plate skin part and formed on the inner side, facing a vehicle body, of the outer plate skin part, and the reinforcing structure part is made of SMC materials through mold pressing. Compared with a fender made of steel in the prior art, a fender composed of the outer plate skin part and the reinforcing structure part both made of the SMC materials is lower in weight, the weight is relatively reduced by 15%-20%, and thus the weight of the vehicle body is greatly lowered; and the mold-pressing process is adopted, the mold development investment is reduced by about 65% compared with steel molds.

The invention discloses a high-toughness amorphous composite material and its preparation method and application. The amorphous composite material is prepared from a base alloy part and a toughness enhancing part; the element composition and atomic mole percentage of the base alloy part are: Zr: 45‑65%, Hf: 5‑15%, Al: 10‑20%, Ni: 10‑20%, M1 component: 5‑10%, M2 component: 2‑8%; the M1 group Divided into one or more of Sn, Bi, Si, Cu elements; the M2 component is one or two of Ag, Pd elements; the purity of each element in the basic alloy part is greater than 99.9%; the toughness enhancement part is One or more of WC, SiC, TiC, TiN, ZrC nano-powders, the amount added is 2-10% of the volume of the above-mentioned base alloy. The amorphous composite material in the invention has good impact toughness, and has high toughness and impact resistance without mechanical processing.

The invention discloses an image capture-based image capture push system for door curtains. The image capture push system comprises at least one hanging mechanism, a sliding rail, sliding blocks, an image capture unit, an image analysis unit, a control unit and linear motors, wherein the image capture unit is arranged on a door frame, and is used for capturing a human body entering the induction area of the door frame and generating an image signal; the image analysis unit is used for analyzing to obtain the coverage density of the human body in an image; the control unit is used for calculating the coverage density of the human body in the image to obtain the width value of the human body in the image, working out a width value to which door curtain bodies on the door frame need to be pushed, and converting the width value into a drive signal for controlling the motion of each motor and outputting the drive signal; the linear motors are respectively and fixedly arranged on the sliding blocks; each linear motor is used for driving the corresponding the sliding block according to the drive signal to do linear motion in the sliding rail so as to push the door curtain bodies on the hanging mechanism, and the stagger width between the door curtain bodies is driven to reach the width value to which the door curtain bodies need to be pushed. The image capture-based image capture push system disclosed by the invention automatically detects and calculates the width value to which the door curtains need to be pushed, and is more automatic and intelligent, and is capable of conveniently providing a pedestrian path.

The invention discloses a densification formation type preparation method of nickel-based alloy powder. The method is characterized by comprising the following steps: weighting the following components in percentage by mass: 34.3 to 39.4% of nickelous nitrate hexahydrate, 23.9 to 26.9% of chromic nitrate nonahydrate, 1.7 to 2.2% of iron nitrate nonahydrate, 2.5 to 3.1% of ammonium tungstate monohydrate, and 30.7 to 35.4% of oxalic acid; preparing a 300mol solution through nickelous nitrate hexahydrate, chromic nitrate nonahydrate, and ammonium tungstate monohydrate, then heating to reach the temperature of 60 to 85 DEG C, and uniformly stirring; adding 2ml ammonium hydroxide, and stirring for a few minutes; adding iron nitrate nonahydrate and oxalic acid to the solution; maintaining the temperature in a water bath, and uniformly stirring; moving out the solution; naturally cooling to reach the room temperature; filtering and precipitating; drying, filtering and grinding the precipitate; placing the grinded powder into a corundum boat-shaped container; transferring the corundum boat-shaped container into a hydrogenation furnace to reduce at the temperature of 750 DEG C, so as to obtain high-temperature nickel-based alloy powder.

The invention discloses a method for calculating the maximum negative mixing enthalpy of a ternary amorphous alloy. For any given ternary A-B-C alloy system, the composition of element A is known, then A m B 100‑x C x , where, x<100‑m‑x, and 0<x<m, 0<m<100; let the mixing enthalpy of A‑B be ΔH 1 , B‑C mixing enthalpy is ΔH 2 , A‑C enthalpy of mixing is ΔH 3 ; for 1mol A m B 100‑x C x , the enthalpy of mixing ΔH formed between x A, B and C atoms 1 =x(ΔH 1 +ΔH 2 +ΔH 3 ); for the remaining (m-x) A atoms and (100-m-2x) B atoms, the mixing enthalpy is ΔH2; then ΔH=ΔH1+ΔH2 is the maximum negative mixing enthalpy of the system. The invention calculates the maximum negative mixing enthalpy of the system, which has important guiding significance for designing the amorphous alloy composition with the maximum amorphous forming ability.

The invention discloses a preparation method of a nanocomposite adsorption material. The specific steps are: adding a certain amount of concentrated sulfuric acid into a 500mL beaker, slowly adding potassium permanganate and sodium nitrate in an ice bath, and fully stirring to dissolve Finally, add expanded graphite and stir evenly, put it in the refrigerator and store it at 273K for 24 hours; heat the beaker to 308K in an oil bath, keep it warm and stir for 30 minutes, slowly add deionized water dropwise, at the same time, keep stirring and keep the temperature Rising to 371K, insulated and stirred at 371K for 15 minutes; the present invention uses agar as a carrier to prepare activated carbon / graphene oxide / agar aerosol, which not only gives full play to the efficient adsorption performance of activated carbon and graphene oxide, but also avoids the easy absorption of graphene oxide. Agglomerated, micro-sized graphene oxide is difficult to remove from the water body, solving the problem of secondary micro-pollution to the water environment.

The invention relates to a detection technology of copper ions, and in particular relates to a preparation method of a reduced carbon quantum dot containing calcium alginate gel for detecting copper ions. The preparation method of the carbon quantum dot containing calcium alginate gel for detecting the copper ions comprises the following steps of: preparing fluorescent carbon quantum dots; neutralizing the fluorescent carbon quantum dots, adding sodium borohydride into the neutralized fluorescent carbon quantum dots to perform reduction; mixing deionized water with the neutralized fluorescent carbon quantum dots at equal volume, and adding sodium alginate into the mixture to obtain a sodium alginate sol; and spraying a calcium ion solution to the surface of the sol or soaking the sol into the calcium ion solution to perform crosslinking, and drying to obtain the calcium alginate gel. By using the characteristics that the carbon quantum dots have fluorescent characteristics, the fluorescence of the carbon quantum dots is enhanced after reduction, and the calcium alginate can enhance the fluorescent characteristics of the carbon quantum dots, when the copper ions are detected, the cost of an adopted fluorospectro photometer is low, the sample preparation and treatment steps are simple and easy to operate, and the detection sensitivity is high, so that the calcium alginate gel can be widely used for detecting the copper ions.

The invention belongs to the technical field of high-entropy alloy wire and its preparation, and discloses a non-isoatomic ratio high-entropy alloy, wire and a preparation method thereof. The preparation raw materials are Fe, Mn, Cr, and Ni metal particles, and the preparation method is as follows: The above-mentioned metal particles are weighed according to the set ratio, melted and poured in a vacuum induction melting furnace, and prepared into a non-isoatomic ratio high-entropy alloy ingot; Then it is hot swiveled into a rod, then rolled by an end mill, annealed at high temperature, and drawn in multiple passes to obtain a wire. The preparation process of the non-isoatomic ratio high-entropy alloy wire prepared by the invention is simple, and no intermediate annealing treatment and surface treatment are interspersed in the wire drawing process, which greatly simplifies the production process of the wire.

The invention belongs to the manufacturing technology of metal materials, and relates to a magnesium metal plate capable of being quickly rolled and formed and a rolling method of the magnesium metal plate. Zn and Er are selected as main alloying elements, the additive amount of Zn is 0-5.0 wt%, the additive amount of Er is 0-1.0 wt%, the sum of the mass percents of Zn and Er is not smaller than 0.5% and not larger than 5.0%, and Mg serves as the balance. The high-temperature rolling temperature interval ranges from 350 to 500 DEG C, and deformation of each pass is 25%-35%. The low-temperature rolling temperature interval ranges from 250 to 350 DEG C and does not include 350 DEG C, and deformation of each pass is 10%-25%. The accumulated deformation of high-temperature rolling and low-temperature rolling is not smaller than 80%. The plate is smooth in surface and edge and free of cracking, and is a metal material of the plate capable of being quickly rolled and formed.

A method for promoting crop straw to become efficiently decomposed by the use of alkaline residues and an application thereof. The method provided by the invention comprises the following steps of: crushing the straw and adjusting the water content to 60-70 wt%, adding inocula with uniformly mixing, adjusting the carbon / nitrogen ratio to 20-30 by the use of urea, adding alkaline residues which account for 5-15 wt% of the above mixture, culturing the materials in airtight condition for 50-60 days, ventilating once three days for 5-15 minutes each time, and adjusting the water content within 60-70 wt% during the period. According to the test, peanuts and rice straw are used as raw materials, two inocula are selected, and different levels of alkaline residues are respectively added; the promotion effect of adding different levels of alkaline residues under the condition of constant temperature incubation on the efficient decomposition of straw is studied, so as to provide an appropriate chemical additive for the aerobic composting of straw and raise the agricultural utilization value of straw.