45 results about "Electromagnetic casting" patented technology

The invention relates to an ultra-strong strength, high-toughness and anticorrosive aluminum alloy and a preparation method for the same. A trace amount of specially-reinforced rare earth elements Sm, Nd and Y are added on the basis of an Al-Zn-Mg-Cu-Zr alloy, an electromagnetic casting mode is adopted for improving the solid solubility of the alloy, homogenizing the structure and reducing segregation, and the proportion of main alloy elements is optimized to make a breakthrough in the strength of the alloy. The aluminum alloy has ultra-strong strength, higher plasticity and high anticorrosive performance; in addition, the high-abundance rare earth element such as Sm and Y serving as one of raw materials is excessively overstocked in the market, and is low in cost, so that not only can be the cost of the alloy remarkably lowered, but also the problem of application unbalance of the rare earth elements can be relieved; the strength of a material prepared from the alloy is stronger than 700MPa after the material is subjected to T77 treatment, and is remarkably stronger than that of a material prepared from a 7055 alloy, and the comprehensive performance of the material is remarkably higher than that of a material prepared from an Al-Zn-Cu-Mg aluminum alloy currently with the highest comprehensive performance.

In a silicon casting apparatus according to the present invention, silicon melted by electromagnetic induction heating is continuously solidified using an electrically-conductive bottomless cold crucible and an induction coil surrounding the cold crucible. The cold crucible is made of copper alloy containing beryllium (desirably containing beryllium of 0.1 to 5 mass %), whereby the generation of electric-discharge flaw can be effectively prevented in performing electromagnetic casting. The use of the silicon casting apparatus according to the present invention can greatly extend a crucible life to reduce facility costs. Additionally, a solar-cell silicon ingot can be produced with high quality.

The invention discloses a silicon electromagnetic casting device. The device comprises a furnace body container, a crucible with conductivity arranged in the furnace body container and induction coils arranged on the periphery of the crucible, wherein the designated gas with some pressure is filled in the furnace body container; after the induction coils in the silicon electromagnetic casting device are energized, silicon in the crucible is heated through induction, melted and then solidified; and each induction coil comprises more than two coils with different induction frequencies positioned from up to bottom. As the silicon electromagnetic casting device adopts more than two coils with different induction frequencies, large total output power can be generated through the combination ofthe induction coils when the terminal voltage of the induction coils with different induction frequencies are set to be less than the specified voltage according to different settings of the induction frequencies and induction output powers of the induction coils. By adopting the silicon electromagnetic casting device, silicon ingots with high quality and larger volume can be produced through thesimple and feasible method.

The invention discloses an electromagnetic casting process for 5754 aluminum alloy, which belongs to the field of aluminum alloy plate production and comprises the following steps: material preparation, material dosing, material adding, melting, stirring, slag removing, primary refining, sampling, component adjusting, carbon tetrachloride refining, beryllium adding, magnesium ingot adding, secondary refining, slag removing, furnace revolving, argon introducing and refining in a maintaining furnace, gas removing, filtering, cast rolling, reeling, cooling and packaging. The electromagnetic casting process has the advantages of effectively restraining turbulence and flow evenness in a cast rolling area of 5754 aluminum alloy melt in the cast rolling process due to a direct current magnetic filed, improving temperature distribution evenness of the 5754 aluminum alloy melt, disturbing solidified balance organization due to oscillation effect in the solidified process, improving content of alloy element in crystal and greatly improving quality of a cast rolling base.

The invention relates to a method of preparing an aluminum alloy wheel hub with high structural strength and belongs to the technical field of metal material processing. The method comprises the steps of smelting a 6061 aluminum alloy, preparing a semisolid 6061 aluminum alloy blank with equiaxed grains by using an electromagnetic casting technique, then carrying out thixotropic die forging on the semisolid 6061 aluminum alloy blank, and carrying out T6 heat treatment on a formed part at last. The whole technical process is simple to implement; small damage is caused to a die; the aluminum alloy wheel hub with the high structural strength can be prepared; and the hardness, tensile strength and elongation of the prepared 15-21in aluminum alloy wheel hub are higher than those of an aluminum alloy wheel hub prepared by the conventional casting method by 50-60Hv, 160-170MPa and 2-3% respectively.

The invention relates to a direct electromagnetic casting driving apparatus (1) and a method of manufacturing a cast component through a plurality of casting channels (10, 11, 12). Different solution channels (20, 21, 22) in the casting channels (10, 11, 12) are heated, braked or accelerated in different degrees by means of the electromagnetic fields of electrified coils (30, 31, 32, 33). A non-contact feed is also provided. Required casting driving force is reduced. The invention ensures controllable starting of a second casting step and reverse action on edge layer solification. Meanwhile, the running material is reduced and the injection weight is minimized.

The invention discloses a beryllium-aluminum alloy sheet and a manufacturing method thereof. The manufacturing method comprises the sequential steps of manufacturing beryllium-aluminum alloy cast ingots, performing hot-pressing preforming on the beryllium-aluminum alloy cast ingots and performing hot-rolling forming on beryllium-aluminum alloy ingot blanks so that the beryllium-aluminum alloy sheet can be obtained. In the step of manufacturing the beryllium-aluminum alloy cast ingots, near-liquidus electromagnetic casting is adopted for manufacturing the beryllium-aluminum alloy cast ingots. The manufacturing method is a composite processing method combining near-liquidus electromagnetic casting, solid-state hot-pressing preforming and precision rolling. Near-liquidus electromagnetic casting is adopted in the step of manufacturing the beryllium-aluminum alloy cast ingots, formation of small and uniform non-dendritic structures is facilitated, and refining of alloy as-cast structures of beryllium-aluminum alloy is facilitated. Alloy dendritic structures of the cast ingots are further fragmented through hot-pressing performing, and the plastic deformation capacity of the alloy is improved. Finally, the sheet of the required thickness is obtained through a precision rolling method, and both the mechanical property and the composition of the produced beryllium-aluminum alloy sheet meet the requirements.

The invention provides a high-precision complicated white copper alloy ternary alloy production technology which comprises the following steps of white copper blank casting, ingot cold machining and surface defect removing, wherein in the white copper blank casting step, horizontal continuous casting is conducted by adopting an electromagnetic casting technology, wherein the smelting temperature is 1,200-1,350 DEG C, and liquid copper is water-cooled; in the ingot cold machining step, rough rolling, annealing and intermediate rolling, annealing and finish rolling, and annealing are performed; and in the surface defect removing step, passivating, pickling and washing of a copper strip are performed, wherein the used passivator is benzotriazole, the concentration of a passivating liquid is 0.5-2.5 g/L, and the conductivity of pure water for washing is controlled to below 50 microseconds/cm. According to the high-precision complicated white copper alloy ternary alloy production technology, horizontal continuous casting is conducted, hot mills and heating furnaces are omitted, the production efficiency is high, and the energy consumption is low; the produced complicated white copper is high in corrosion resistance, tensile performance and elongation.

The invention provides a preparation method of a titanium and titanium alloy large-specification seamless pipe. According to the preparation method, an electromagnetic casting hollow pipe blank is adopted, a two-roller or three-roller skew rolling process is adopted to conduct cogging on the pipe blank for 2-3 passes, then warm rolling-cold rolling-cold stretching or warm rolling-cold stretching or warm rolling-expanding stretching is conducted, and the stretched pipe is subjected to inspection, fixed-length sawing, surface cleaning and finished product annealing and then is packaged and put in storage. By means of the preparation method, the problems of uneven wall thickness, unstable quality, unsuccessful perforation and the like of a pierced billet in the traditional skew rolling-perforation process are avoided; the process link of repeatedly heating and repeatedly rolling a cast ingot in the traditional process is omitted, so that the heating time is shortened, and oxidation of the pipe blank which sucks air after heating is relieved; annealing and pickling procedures and pickling metal loss are reduced; and large-specification seamless pipes with the diameter ranging from 80mm to 424mm and the wall thickness ranging from 2mm to 30mm can be produced to meet market requirements.

The invention discloses a semi-continuous casting process of a VW64M high-strength heat-resistant magnesium alloy big ingot blank. An alloy contains, by weight, 5.0-7.0% of Gd, 2.5-4.0% of Y, 0.1-0.3% of Ag, 0.15-1.0% of Zn, 0.25-0.65% of Zr, 0.002-0.050% of Ca and the balance Mg. The process mainly includes the following steps that a magnesium ingot is molten at the temperature ranging from 670 DEG C to 720 DEG C; a Mg-Ca intermediate alloy and a fluxing agent are added; alloy elements are added at the temperature of 750 DEG C to 800 DEG C; refining and slagging-off are performed; gas feeding and stirring are performed; the temperature is adjusted to reach 680 DEG C to 700 DEG C and maintained for still standing for 1.5-3.5 hours; and low-temperature low-speed electromagnetic casting is performed. By coordinating the process parameters of all the steps, the magnesium alloy ingot blank being free of cracks, smooth in surface, small in grain size, uniform in structure and free of solute segregation and having the diameter phi of 300-630 mm and the length of at least 1000 mm is obtained.

The present invention relates to MF and HF continuous elecromagnetic casting and LF electromagnetic stirring process for preparing aluminum -1% silicon fine wire masterbatch for IC linkage. Into one special 6-120 mm inner diameter induction crystallizer, current of 1000-100000 Hz and current of 5-100 Hz are separately fed to generate electromagnetic field, so that liquid metal is suspended insidethe crystallizer. Under the action of strong electromagnetic stirring and strong water spraying cooling, liquid metal is oriented and solidified fast to realize continuous casting. The features includes excellent surface quality, homogeneous element components without segregation, compact and fine crystal structure, good ventilation, less pinhole and less oxide inclusion.

The invention relates to an oxygen-free copper strip horizontal electromagnetic casting device and belongs to oxygen-free copper strip production and processing matched equipment. The oxygen-free copper strip horizontal electromagnetic casting device comprises a crystallizer shell, a medium-frequency power supply, an induction coil, an electromagnetic oscillator, a shielding cover, a cooling water tank, a bottom die and a pouring mechanism; the pouring mechanism consists of a tundish and a pouring gate plug; the tundish is arranged on the upper part of the crystallizer shell; the bottom of the crystallizer shell is provided with a pouring gate; the pouring gate plug is arranged in the pouring gate; the tundish is communicated with the upper part of the crystallizer shell through the pouring gate; the upper part of the crystallizer shell is provided with the induction coil; the electromagnetic oscillator is connected with the induction coil; the induction coil is connected with the medium-frequency power supply; the induction coil is formed by winding pure copper of which the section is rectangular; the circulating cooling water is filled in the hollow part of the induction coil for the primary cooling; a cooling water box and a shower pipe are arranged on the lower part of the crystallizer shell, and spray water to cool the crystallized stripped copper blank for the secondary cooling; and the bottom of the crystallizer shell is provided with the bottom die.

The invention belongs to the technical field of metal forming equipment, and particularly relates to an electromagnetic casting system. The system comprises a heat preservation device, an electromagnetic casting device, a vacuum device and a pressure device, wherein the heat preservation device comprises a heat preservation furnace; the electromagnetic casting device comprises a casting mold cavity; and the vacuum device and the pressure device are correspondingly connected with the heat preservation furnace and the casting mold cavity, and are used for carrying out vacuum pumping treatment and pressurization treatment on the heat preservation furnace and the casting mold cavity correspondingly. According to the electromagnetic casting system, on the basis of electromagnetic casting, the vacuum pumping treatment is carried on metal liquid contained in the heat preservation furnace and pressure is slowly applied to the metal liquid during casting, and the vacuum pumping treatment and pressurization operation are also carried out in a casting mold region, thus the phenomenon of air holes generated during casting of the metal liquid is avoided, the quality of a casting piece is improved, the situations that mold filling of the metal liquid is complete and solidification is achieved according to a preset solidification process are guaranteed, and the service life of an electromagnetic pump is further prolonged.

The invention belongs to the technical field of ternary alloy production application, and in particular relates to an electromagnetic casting process applied to high-precision complex cupronickel ternary alloy production. The process comprises the following steps: S1) cleaning a copper raw material and ingredients; S2) smelting the cleaned copper raw material and ingredients through a smelting furnace; and S3) firstly pouring a smelted solution in the step 2 into a device provided with an electromagnetic coil to generate an electromagnetic force for electromagnetic treatment. The electromagnetic casting process applied to high-precision complex cupronickel ternary alloy production provided by the invention has the beneficial effects that a liquid metal is solidified in a solid state; in co-melting of a solid and a liquid, the electromagnetic force is generated by the electromagnetic coil, and an electromagnetic field is applied to the metal to improve metal flow and distribution of a solute, so that the defects such as segregation on the surface of an ingot and in the ingot are effectively eliminated and fine and uniform crystal structures are obtained so as to improve the product quality, and therefore, the product yield is improved and the production and economical cost is lowered.

The invention discloses a lug copper material production technology which comprises the following steps: adopting an oxygen-free copper furnace to carry out electromagnetic casting on high-purity cathode copper to prepare ingot blank; carrying out hot rolling first and then online cooling on the ingot blank; carrying out finish-milling on surfaces: carrying out finish-milling on double surfaces twice, and scrubbing with clear water; rough rolling and cogging: carrying out two-rack four-pass rolling; adopting rapid abrasive to clean and remove oil, and carrying out refined scrubbing with the abrasive; cleaning again after annealing; rolling and cleaning with all oil having no chromatic aberration; rapidly annealing and cleaning without scrubbing grains; rolling to obtain a finished productwith all oil having no chromatic aberration; rapidly cleaning and removing oil; annealing and cleaning without scrubbing grains; and carrying out lossless shearing and withdrawing-straightening on thefinished product to obtain a lug copper strip. With adoption of the lug copper material production technology, the electricity and heat conduction performance and the bending performance of the copper strip can be effectively ensured, the surface defect can be effectively removed, the surface pollution caused by emulsion and rolling oil is reduced, the surface is prevented from the scrubbing grains, scratch and other defects, nickel plating of the copper strip during the following machining process is tighter and more uniform, and the service life of a lug processed in the following process can be prolonged to 10 years.

The invention relates to a solidification orientation device under a magnetic field, and belongs to the technical field of electromagnetic casting. The device comprises a cylindrical cooling copper die connected with a shell through a second flange, the shell is connected with a sealing cover through a first flange, an air inflation hole is formed in the first flange, a crucible is fixed in the shell, and a gap is reserved between the crucible and the shell and communicated with the first flange; the outer wall of the crucible is wound with an induction heating coil, a casting opening is formed in the bottom of the crucible, a casting control lever is arranged in the crucible, and the casting opening can be plugged in a casting sealing manner when the casting control lever downwards moves; a through hole and an air through hole are formed in the bottom of the shell, the gap and the second flange are communicated through the air through hole, and an exhaust hole is formed in the second flange; and a steady-state magnetic field generator is arranged outside the cooling copper die, a base plate of the cooling copper die is provided with a ring-shaped groove homocentric with the inner wall of the cooling copper die, a quartz tube is installed in the groove, and a conic diverter is arranged at the top of the quartz tube. The solidification orientation device is simple in structure and convenient to use; and studying of the included angle relationship between multiple different solidification organization growth directions and the magnetic field direction can be achieved in one experiment.

The invention relates to progressively increased tooth pitch traveling wave magnetic field casting equipment and a casting method. The casting equipment comprises a horizontally arranged metal melt filling device and a traveling wave magnetic field electromagnetic inductor located at the bottom of the metal melt filling device, wherein the traveling wave magnetic field electromagnetic inductor generates a traveling wave magnetic field by loading current, so that a metal melt in the metal melt filling device moves at constant speed for filling. By the use of the progressively increased tooth pitch traveling wave magnetic field casting equipment and the casting method, the progressively decreased traveling wave magnetic field can be obtained, so that alloy melt filling is steady, and recesses in the surface of a melt solidification process are eliminated; the production efficiency and the surface quality of traveling wave magnetic field casting can be effectively improved; and the technical obstacles are cleared away to comprehensively popularize electromagnetic casting.