55results about How to "Low forming temperature" patented technology

The invention discloses a laser tailor-welded high-strength steel warm forming preparation method. The laser tailor-welded high-strength steel warm forming preparation method is characterized by comprising the following steps: manufacturing a 22MnB5 steel plate and a medium manganese steel plate into a steel part for later use; carrying out laser tailor-welded connection treatment; carrying out heating treatment on the steel part for later use, which is subjected to laser tailor-welding; transferring the steel part onto a stamping mold to carry out stamping forming and quenching; finally obtaining a two-phase or three-phase microstructure formed by lots of ferrite, martensite or bainite in the 22MnB5 steel area of the tailor-welded steel part; and obtaining a martensite organization structure in the medium manganese steel area, thereby forming a warm forming technology of the laser tailor-welded high-strength steel, which has no need for coating treatment in advance and has gradient distributed mechanical property. The laser tailor-welded high-strength steel warm forming preparation method has the beneficial effects that the process combination of laser tailor-welding and the warm forming technology is realized; the warming forming technology is used for enabling 22MnB5 steel to form the two-phase or three-phase microstructure; the two-phase or three-phase microstructure is matched with medium manganese steel having martensitic structure in the end to obtain a custom-made warm forming part with gradient distributed performances; the technological process is simplified; and the production efficiency is improved.

The invention belongs to the technical field of glass fiber and relates to an enhancement type spinning high-strength and high-modulus glass fiber composition applied to the fields of electromechanics, chemical engineering, aircrafts and the like. The enhancement type spinning glass fiber composition is prepared from, by weight, 56-65% of SiO2, 15-21% of Al2O3, 9-18% of MgO, 5-13% of CaO, 0.1-4% of Y2O3, 0-0.8% of Li2O, 0.1-1% of K2O+Na2O, and 3% or less of other impurities. The enhancement type glass fiber composition is prepared through a tank furnace technological process, by means of optimization and combination of the oxide components and particularly the introduction of Y2O3, the melting temperature, the clarification temperature and the shaping temperature of the enhancement type glass fiber composition are reduced under the situation that high strength and high modulus are guaranteed, the temperature difference between the shaping temperature and the liquidus temperature is increased, the wiredrawing situation is improved, and the enhancement type glass fiber composition is beneficial to the industrial production of high-strength and high-modulus fibers.

The invention provides a preparation process of a Ti2AlNb/TA15 bi-metal titanium alloy composite hollow structure part. The Ti2AlNb/TA15 bi-metal titanium alloy composite hollow structure wing type component is prepared through the steps of blank preparation, surface treatment, welding stop agent coating, superplastic forming/diffusion bonding, cooling, out of a furnace and the like. The superplastic forming/diffusion bonding process method of the dissimilar material hollow structure part breaks through the key technology of the multi-layer hollow structure prepared by combining a Ti2AlNb intermetallic compound and an ordinary titanium alloy, the high-temperature resisting characteristic of the Ti2AlNb intermetallic compound and the good superplasticity of the TA15 titanium alloy are givento full play, structure weight losing is achieved, the guided missile thrust-weight ratio is increased, the application of the Ti2AlNb intermetallic compound to types is promoted, the material application range is expanded, the material utilization rate is increased, and the cost is reduced.

The invention discloses a single-point longitudinal vibration controllable progressive forming system for a metal plate. The main shaft of the single-point longitudinal vibration controllable progressive forming system for the metal plate is installed on a rack; a force sensor is installed on the shaft end of the main shaft; a vibration signal generator is connected with a vibration exciter; the vibration exciter is installed below the force sensor; a tool head is connected with the vibration exciter via a connecting rod; a workbench is installed just below the main shaft; the input end of a parameter controller is connected with the force sensor; and the output end of the parameter controller is respectively connected with the vibration frequency and amplitude control port of the vibration exciter as well as the X-shaft driving motor control port and the Y-shaft driving motor control port of the workbench. A single-point longitudinal vibration plasticity forming condition of the plate material is established by combining a forming technology parameter, a vibration mode parameter and a forming force parameter, and the parameter controller is used for monitoring and regulating the forming technology parameter and the vibration mode parameter in real time according to the plate material forming technology state and the vibration plasticity forming condition. The single-point longitudinal vibration controllable progressive forming system for the metal plate, which is disclosed by the invention, has the beneficial effects that the technical defects of single-point progressive forming can be overcome, the technology parameter and the vibration mode parameter can be monitored and regulated in real time according to the plate material vibration plasticity forming condition in the forming process, and efficient and precise progressive forming of the metal plate material can be realized.

The invention relates to a forming method of a block-shaped amorphous composite material, which is characterized by comprising the following steps: (1) selecting a block-shaped amorphous composite material which has the component purity greater than 99.3% and substrate components with strong glass forming capacity, preparing a high-purity block-shaped amorphous composite material, and cutting the block-shaped amorphous composite material into an ingot blank according to a forming part; (2) heating the ingot blank under gas protection at the speed of 0.5-50 DEG C/s to the liquidus temperature and the solidus temperature range of the block-shaped amorphous composite material, and insulating for 3-30 minutes; and (3) under pressure, filling a liquid-solid coexistent metal slurryinto a mold cavity at a deformation rate of 102-106s<-1>, and forcibly cooling for solidifying at the cooling speed of 1-200 DEG C/s while maintaining the pressure. The invention can obtain the metal slurry the second phase of which is uniformly distributed in the liquid phase, has low forming temperature, long service life of the mold and high production efficiency, improves the product performance, can be used for forming parts with complex forming shapes and thin walls, and can be widely applied to amorphous composite materials of Zr-series, Cu-series, Ti-series, La-series, Co-series and the like.

The invention relates to a nano/superfine medium-manganese TRIP (transformation induced plasticity) steel plate and a warm-rolling preparation method thereof, belonging to the technical field of ultrahigh-strength steel. The nano/superfine medium-manganese TRIP steel plate comprises the following chemical components in percentage by weight: 0.17-0.25wt.% of C, 0.00-0.50wt.% of Si, 5.00-7.00wt.% of Mn, 1.00-1.50wt.% of Al, 0.014-0.03wt.% of N, 0.00-0.06wt.% of Nb, 0.00-0.25wt.% of Mo, and the balance of Fe and inevitable impurities. The preparation method comprises the following steps: smelting, forging, carrying out hot rolling, and carrying out warm rolling to obtain the nano/superfine medium-manganese TRIP steel plate; and carrying out heat treatment on the steel plate to obtain the nano/superfine medium-manganese TRIP heat-treated steel plate. By using the warm-rolling technique instead of the typical technique for producing manganese steel, the method provided by the invention has the advantages of simple technique, short production cycle and controllable plate shape. The prepared steel plate has a nano/superfine structure, has the advantages of high strength and favorable properties, and satisfies the target requirements of resource saving, energy consumption reduction, light weight and crash safety enhancement for automobile industry.

The invention provides a method for forming an isotropic neodymium-iron-boron magnet. The method comprises the step of smelting an alloy raw material into a prealloyed cast ingot, the step of performing non-crystallizing treatment on the prealloyed cast ingot to obtain a fast-quenched alloy, the step of performing ball milling on the fast-quenched alloy to obtain a powder, the step of mixing the powder with a binder to obtain a slurry, and the step of forming the slurry into the magnet. The binder is a water-based binder, preferably a methylcellulose aqueous solution, and the solid content in the slurry ranges from 30vol% to 60vol%. The method is capable of realizing the formation of the isotropic neodymium-iron-boron magnet large in dimension and complex in shape, and therefore, the purpose of reducing the oxygen content is achieved, and simultaneously, the carbon residue in a degreasing process can be greatly reduced.

The invention discloses a pulse current assisted hollow splitting micro-forming die and method for a titanium alloy micro-gear, relates to the pulse current assisted micro-forming die for the micro-gear and the hollow splitting micro-forming method, and solves the problems of high forming difficulty of the titanium alloy micro-gear or a gear shaft structure and short service life of the die. The die comprises a die part and a power part, the die part comprises a die handle, a male die seat, an upper insulating plate, a guide component, a male die baseplate, a male die, a male die protection sleeve, a male die clamping body, a female die, a female die baseplate, a female die fixing plate, a female die gasket, an ejector, a lower insulating plate, a lower ejection rod, a lower ejection rod sleeve and a female die seat, the method is implemented according to the following steps: step 1, installing the die; step 2, compressing a titanium alloy blank; step 3, heating and forming; and step 4, demolding. The pulse current assisted micro-forming die for the micro-gear and the hollow splitting micro-forming method belong to the technical field of machine manufacturing and plastic micro-forming.

The invention relates to a preparation method of a multilayer composite membrane capacitor, comprising the following steps of: firstly preparing ceramic powder doped with barium titanate, then preparing alkali metal low-temperature electrocondutive slurry, preparing a multilayer membrane, carrying out pretreatment and isostatic pressing, finally connecting a plurality of multilayer membrane blocks and forming an ultrahigh power multilayer composite membrane capacitor. The multilayer composite membrane capacitor adopts isostatic pressing technique, solves the technical problems of high cost and low qualification rate of the existing sheet-type multilayer ceramic capacitor when adopting sintering technique for preparation, has the advantages of high voltage, high power, low cost and the like, greatly improves the energy storage density of the ceramic capacitor and reduces the technique cost of the capacitor. The capacitor can be used in various fields which have high requirements for discharging power and voltage of the capacitor.

The invention provides an artificial aging-state high-strength aluminum alloy retrogression forming synchronous process. Firstly, a stamping forming die is cleaned, and an artificial aging-state aluminum alloy is placed on the die; a sheet is rapidly heated to a temperature higher than an artificial aging temperature by 120-160 DEG C by means of electromagnetic induction or electric conduction heating; the heat preservation is carried out for a certain time period, wherein the heat preservation time is controlled to be 20-60 seconds or within; the stamping and the forming are carried out in the process, and a formed component is air-cooled to the room temperature; and the artificial aging strengthening treatment can be continuously carried out at a later stage according to the requirements. According to the process, the alloy stamping formability can be remarkably improved at a lower temperature, and specifically, the formability efficiency of the high-strength aluminum alloy is improved while the material performance of the high-strength aluminum alloy is ensured; and the synchronous process is beneficial to the cooperative control of the shape and performance of the high-strengthalloy, and can be used for manufacturing parts of automobiles, aerospace, ships and the like.

The invention discloses an Mg-Gd-Zn-Ni-Zr rare-earth magnesium alloy for semisolid forming and a preparation method for a semisolid blank of the semisolid Mg-Gd-Zn-Ni-Zr rare-earth magnesium alloy. The alloy comprises the following components in percentage by weight: 15-21% of Gd, 2.0-3.6% of Zn, 0-0.5% of Ni, 0.3-0.7% of Zr and Mg in balancing amount. The preparation method for the semisolid blank comprises the following steps: taking pure Mg, pure Gd, pure Zn, pure Ni and an Mg-30wt.%Zr intermediate alloy as raw materials, first smelting the raw materials to prepare a master alloy ingot, then performing low-temperature semisolid isothermal heat treatment of the master alloy ingot, and finally performing water quenching to obtain the semisolid blank. The magnesium alloy for semisolid forming, provided by the invention, belongs to an Mg-RE series high-strength magnesium alloy, the semisolid forming temperature of the magnesium alloy is low, the solid-phase content of the magnesium alloy has low susceptibility to temperature variation, and the roundness of obtained solid-phase particles is high. According to the preparation method for the semisolid blank, provided by the invention, the preparation temperature is low, less oxidation and combustion are caused, the process is easy to control, and a semisolid forming technology is appropriate for preparing high-strength and complex-shaped magnesium alloy parts.

The invention provides a degradable antibacterial magnesium alloy and a preparation method of the degradable antibacterial magnesium alloy, and relates to the field of metal biomedical materials. Thedegradable antibacterial magnesium alloy comprises main active elements of Ag, Cu, Zn and Sr, and by means of composition optimization design of the magnesium alloy, the components comprise, by mass,1.35-1.65% of Ag, 0.9-1.1% of Cu, 3.6-4.4% of Zn, 0.9-1.1% of Sr, 0.36-0.44% of Ca and the balance Mg and other inevitable impurities. After the magnesium alloy material implant finishes the action, the magnesium alloy material implant can be completely degraded to avoid secondary operation removal, the medical cost and the pain of patients are reduced, the antibacterial property of the implant isimproved, and the magnesium alloy material implant has the functions of promoting osteoblast formation and inhibiting osteoclast bone absorption; the degradable antibacterial magnesium alloy adopts asemi-solid rheological die casting process, the microstructure of the product is uniformly distributed, the internal structure is compact, the defects of pores, segregation and the like are few, andthe requirements for high quality and high precision of implant products can be met.

The invention provides a semi-solid slurry pulping device comprising a rotor mixer (1) and a pulping tank (2). The rotor mixer (1) comprises a mixing drum (9) and a rotor mixing rod (4) extending fromthe mixing drum (9) to the interior of the pulping tank (2), and the mixing drum (9) is internally provided with a driving device used for driving the rotor mixing rod (4) to rotate by itself. The end face, facing the pulping tank (2), of the mixing drum (9) is provided with a transmission gear (6), the rotor mixing rod (4) is connected with the transmission gear (6) in an engaged manner, the transmission gear (6) is provided with n teeth, the spacing between the adjacent front and rear teeth is a, and the tooth width of each tooth is b; and the end, connected with the transmission gear (6),of at least one rotor mixing rod (4) is provided with engaged teeth matched with the transmission gear (6), each rotor mixing rod (4) comprises m engaged teeth, the spacing between the adjacent frontand rear engaged teeth is b, and the tooth width of each engaged tooth is a.

The invention discloses hot isostatic pressing forming equipment. The hot isostatic pressing forming equipment comprises a device body, a device main body and a forming device arranged in the device main body. The forming device comprises a first cavity formed in the device main body. Locking devices are symmetrically arranged on the front and back side inner walls of the first cavity, a hydrauliccylinder is fixedly arranged in the left side inner wall of the first cavity, a first slide block capable of sliding left and right is arranged in the first cavity, and a hydraulic inner column is infit connection between the left side end surface of the first slide block and the hydraulic cylinder. The hot isostatic pressing technology has the advantages of integrating advantages of hot pressing and isostatic pressing and being low in forming temperature, compact in product and excellent in performance, so that the hot isostatic pressing technology is a necessary means of preparing a high performance material. At present, the hot isostatic pressing technology is extremely low in popularizing rate in China. As the hot isostatic pressing technology is not applied in a large scale industrially, the production cost is relatively high. The invention aims to provide the device which can lower the preparation cost and improve the forming efficiency while achieving hot isostatic pressing work.

The invention discloses a preparation method for a semisolid squeeze cast shaft sleeve part and belongs to the field of semisolid forming. The method comprises the steps that a rectangular cast ingotis heated to the temperature 50-100 DEG C higher than the recrystallization temperature through an induction heating furnace at first, then subjected to multidirectional multi-pass hot rolling, cooledto the room temperature, then subjected to multidirectional multi-pass cold rolling, and put into the induction heating furnace to be heated to the temperature 10-20 DEG C higher than the Tm after being cut, heat preservation is conducted for 10-15 min, then the rectangular cast ingot is conveyed into a die for semisolid bottom filling squeeze casting, a left concave die body and a right concavedie body are controlled to apply lateral pressure to a shaft sleeve after squeezing is completed, pressure is maintained, finally, the die is dismounted, the shaft sleeve part is taken out, and forming of the next part is conducted. The method adopts bottom filling squeezing, a squeezed part is stressed in three directions, the mechanical performance of the formed part is good, and the method is easy to operate, convenient to control, short in technological process and capable of achieving mechanical control.