11 results about "Induction heating" patented technology

The invention discloses a producing method for copper coated aluminum row profile, and the method comprises following steps in turn: 1) cleaning, 2) drying, 3) head rolling, 4) clearance drawing, 5) bimetal combining furnace heating, 6) high frequency induction heating, 7) hot drawing, 8) heat preserving, 9) oxide layer washing and 10) packing. Beneficial effects of the invention are: the metal is not oxidized during drawing. The high frequency induction skin effect enables two kinds of metal with significantly different melting points reaching the critical point of composite metal metallurgy integrating temperature simultaneously, so a permanent compact metallurgical combining is realized between the two kinds of metals. The density of the profile in the invention is only 36.5% to 41.6% of that of pure copper rows, the length of the profile is 2.45 to 2.70 times of that of pure copper rows, the tensile strength of the profile is over 1.6 to 2 times of that of pure copper rows, and the specific resistance is between 0.027310 ohm question mark mm2/m(-40 Celsius system) and 0.041506 ohm question mark mm2/m(70 Celsius system).

The present invention relates to an apparatus and method for growing a high melting point single crystal having a predetermined orientation, which is grown from a culture rod (3) by a floating zone method or a suspension zone method. The device comprises: culture rods (3) and crystal nuclei (4), a strip-shaped resistance heating type heating strip (6) provided with at least one opening is installed between its ends and next to it, and it is heated To the crystal melting temperature, so as to form the melting zone (5), drive mechanism (8, 11), so that relative movement occurs between the heating belt (6) and the crystal nucleus (4) and the culture rod (3) that are installed next to the heating belt , the molten liquid material of the culture rod (3) is obtained through each opening of the heating belt, and causes single crystal growth on the crystal nucleus (4) by cooling, and another heating device (15, 16), which is arranged at the melting The vicinity of the zone (5) in order to set the temperature gradient within the range of the melting zone (5). In order to reduce the temperature gradient in the melting zone, said further heating device (15, 16) comprises at least one heating coil (17, 19), which is driven with radio frequency, wherein the heating strip (6) and the respective heating coil are thus mounted opposite each other (17, 19) so that radio frequency radiation is coupled on the heating strip in order to generate an additional inductive heat input in the heating strip and to set a temperature gradient across the melting zone (5). This enables an inductive heat input into the heating strip, which can be varied or varied in a targeted manner.

The invention discloses a special-steel-material flexible wheel of a harmonic reducer, and a cyclic heat treatment method thereof. The cyclic heat treatment method comprises the three steps of carrying out normalizing heat treatment, rough machining and thermal refining; the isothermal annealing operation is cancelled; the normalizing heat treatment comprises the following concrete steps of feeding a forged flexible wheel workblank into a heating furnace, adjusting the normalizing induction heating temperature to range from 880 DEG C+/-20 DEG C, heating and insulating for 45min, and continuously carrying out normalizing heat treatment for two times; and the thermal refining comprises the following concrete steps of feeding a roughly machined flexible wheel workblank into the heating furnace, adjusting the quenching induction heating temperature to range from 850 DEG C+/-20 DEG C, insulating for 45min, then oil quenching, adjusting the tempering induction heating temperature to range from 560 DEG C+/-20 DEG C, insulating for 90min, and carrying out thermal refining for 1 to 3 times according to the flexible wheel grain size number requirement. The special-steel-material flexible wheel of the harmonic reducer, and the cyclic heat treatment method thereof provided by the invention have the beneficial effects that after the cyclic heat treatment method provided by the invention isadopted to treat the flexible wheel made of the special steel material (medium-carbon high-strength quenched and tempered steel), the original austenite grains of the flexible wheel can be refined andhomogenized.

The invention relates to an induction normalizing method for a steel rail. The method applying an induction heating technology to a normalizing process of seamless welding of a track comprises the following steps: first, carrying out medium frequency induction heating to the normalizing temperature of 840-880 DEG C and keeping the temperature for 8-10 minutes; then introducing cold water into a designed novel induction coil to water cool the induction heated steel rail, wherein the integral steel rail is cooled by water; and finally, naturally cooling the steel rail to room temperature when the temperature of the steel rail is reduced to 445-455 DEG C. Compared with the prior art, by applying induction heating to normalizing of track welding, the environmental pollution problem in the prior art is reduced, the heating speed and the heating efficiency are improved effectively, the time of the whole normalizing process is shortened greatly, and the demand of automation is easily met.

The invention discloses a method for producing high-temperature alloy by adopting induction heating vacuum refining, which is realized through the following steps that: in a 1 to 3-ton induction steelmaking furnace, induction is utilized to heat molten steel; the temperature of the molten steel is increased to 1380 DEG C to 1650 DEG C; 20 to 80 kg of CaO-Al2O3 (5 to 30 percent of Al2O3) refining slag series is added to the surface of the molten steel, wherein, CaO-Al2O3 contains 5 percent to 30 percent of Al2O3; after melting and refining slag, vacuum treatment is carried out by being covered with a vacuum cover; during the vacuum treatment, on one hand, argon gas is fed into the furnace through a porous plug at the bottom of the induction steelmaking furnace, and the flow of argon gas is kept at 5 to 20 liters/minute; on the other hand, the vacuum pressure in the induction steelmaking furnace is kept between 0 and 10Pa; the heating power of the induction steelmaking furnace is kept between 100 and 600KW; the refining time is kept between 15 and 45 minutes; after refining and vacuum treatment, slagging-off is carried out; under the protection of argon gas, tapping and ingot teeming are carried out; by adopting the method of the invention, gas contained in finished product and impurity contained in molten steel are greatly reduced; chemical compositions are very much uniform; product performance is greatly improved; besides, the production cost is greatly reduced.

The invention discloses a temperature control system for a high-frequency heating sealing device of a PE can packing machine, and the system comprises at least one can packaging production line, wherein the high-frequency induction heating sealing device of each can packaging production line is provided with a cooling pipeline and a first temperature sensor; a circulating water tank which comprises a tank body, an input circulating apparatus which is disposed on the tank body and is connected with a water supply pipeline and a water drainage pipeline, an output circulating apparatus which is connected to each cooling pipeline, and a second temperature sensor; and a temperature control unit which is disposed in the circulating water tank, and comprises a control mainboard which is in communication connection with the first temperature sensor and the second temperature sensor. The control mainboard obtains the temperature data of the high-frequency induction heating sealing devices and circulating water in the circulating water tank through the first and second temperature sensors during current operation, so as to switch the working states of the input circulating apparatus and the output circulating apparatus.

The invention discloses a segmented heating and cooling quenching process for a wheel body of a thrust wheel. The process comprises the following steps of 1, placing and positioning the thrust wheel, wherein the thrust wheel is grabbed through a mechanical arm and placed on a support platform in a quenching device; 2, sequentially conducting intermediate frequency, high frequency and intermediate frequency induction heating on the thrust wheel through induction coil bodies; 3, cooling the thrust wheel obtained after induction heating, wherein spray cooling implemented through water, saline water and oil is sequentially conducted on the thrust wheel obtained after induction heating. According to the thrust wheel quenching process, the water-saline water-quenching oil cooling process is adopted, so that the problems that in the prior art, the quenching speed of a thrust wheel is low, the thrust wheel is deformed and cracked, and the thrust wheel is inconsistent in hardness after being quenched; the quenching process has the advantages of being uniform in thrust wheel hardness and high in quenching efficiency.

The invention discloses a method for preparing coarse granularity chromium carbide powder capable of simplifying the process, saving the energy consumption, improving the rate of qualified products ina milling process and well meeting requirements of preparation of wear-resistant, corrosion-resistant, high-temperature oxidation resistant novel materials in industries such as hard-face materials,flux-cored wires, high temperature alloys and the like. The method comprises the following steps: burdening chromium sesquioxide powder and carbon, and adding an adhesive to be uniformly mixed; molding with a press after uniform mixing; placing the molded material block in a high-temperature vacuum induction heating furnace graphite crucible, vacuumizing, performing power-on heating and raising the temperature, and maintaining the vacuum degree to be within 200-400Pa; carrying out a vacuum carbonation reaction between the chromium sesquioxide powder and carbon to produce chromium carbide, andcontrolling the carbonation reaction temperature to be 1350-1550 DEG C, wherein the carbonation reaction time is 8-15 hours; enabling the vacuum degree to be less than 100Pa, filling the furnace withargon after the carbonation reaction is completed, controlling the pressure in the furnace to be 40-80kPa, and increasing the heating power to melt the chromium carbide sintered body so as to obtain achromium carbide ingot; crushing the chromium carbide ingot into particles with the granularity of less than 10mm by using a mechanical method, milling by an impact crusher, and passing through a 60-mesh sieve, thereby obtaining the coarse granularity chromium carbide powder.

In a method for heat treating a fuel assembly channel made of zircaloy, the channel is continuously moved relative to a heat-treatment device and, longitudinal sections of it are heated to the beta phase range in an inductive heating zone. The longitudinal section of the channel heated in this manner is than cooled in a cooling zone to a temperature within an alpha phase range. The heat treatment is effected by at least two heating devices, which are spaced apart from one another, operate independently of each other, and each contain at least one induction coil and together form a heating zone. The channel section is first heated using a first heating device and then heat-treated using a second heating device which has less power and in that cooling is effected using a stream of inert gas applied to the outer surface of the channel.

The invention discloses a combined type pocket block based on an electromagnetic induction heating tapping technology. The combined type pocket block comprises an upper pocket block body and a lower pocket block body; an induction coil is poured and packaged in the lower pocket block body; an induction coil lead wire is led out of the bottom of the lower pocket block body, penetrates through a steel ladle bottom case and is connected with an induction heating power supply; the upper pocket block body is stacked at the top of the lower pocket block body; the upper pocket block body is in located connection with the lower pocket block body through a bulge and groove structure on the contact surface; an upper molten steel channel is formed in the upper pocket block body, and is of a frustum cone-shaped structure; the minor diameter end of the upper molten steel channel faces downwards; the height of the upper molten steel channel is less than or equal the height of a Fe-C alloy fusion layer; a lower molten steel channel is formed in the lower pocket block body; the lower molten steel channel is of a cylindrical structure and communicates with the upper molten steel channel; and the diameter of the lower molten steel channel is equal to that of the minor diameter end of the upper molten steel channel. Duty-cycle operation of the induction coil is achieved, the sizes of the molten steel channels are optimized, and the 100% automatic pouring rate is ensured.