30results about How to "Improve induction heating efficiency" patented technology

The invention relates to a manufacture method for manufacturing a steel plate with high strength and high toughness by using a hot-rolling coiled plate. The method comprises the following steps that: firstly, after a hot-rolling coiled plate is leveled on a leveling machine set, refining heat treatment is carried out on the hot-rolling coiled plate, i.e. the hot-rolling coiled plate is heated in induction heating equipment, the heating time is within 60-140s, and the hot-rolling coiled plate is heated to 910DEG C to 960DEG C and austenized; then, the hot-rolling coiled plate enters a water-cooling or steam-cooling quenching machine set to carry out quenching, the quenching and cooling speed of the hot-rolling coiled plate is greater than or equal to 5DEG C / s, and a quenched martensite organization is obtained after quenching; tempering is carried out after quenching, induction heating is carried out by adopting the induction heating equipment in the tempering, the heating temperature of the quenched martensite organization is 220DEG C to 440DEG C, the tempering time is 80 to 180s, and a tempered martensite organization is obtained; and finally, straightening, flaw detection, surface inspection and sampling inspection are carried out to finally obtain the steel plate with excellent performance, high strength and high toughness. The invention has the advantages that as refining treatment adopts an induction heating method, the heating time is short, austenite crystal grains are fine, the mechanical property is superior to that of a similar product produced by the traditionaltechnology, the plate type of the steel plate is good, and the invention has high production efficiency, low equipment investment, little maintenance cost of the equipment, small occupation area and little environmental pollution.

The invention relates to a flux leakage controller used for controlling workpiece groove induction quenching flux leakage. The flux leakage controller comprises a quartz glass tube and a magnetic conduction device wrapping the outer layer of the quartz glass tube. The magnetic conduction device is a magnetizer or silicon-steel sheets; the magnetizer is a medium frequency magnetizer or a high frequency magnetizer; and mica sheets are uniformly distributed between the silicon-steel sheets, and the quantity ratio of the silicon-steel sheets to the mica sheets is 10:1-20:1. The silicon-steel sheets and the mica sheets are provided with holes matched with the quartz glass tube, and the silicon-steel sheets and the mica sheets are fixed on the quartz glass tube through the holes and binder. The invention also discloses a preparation process of the flux leakage controller used for controlling the workpiece groove flux leakage. According to the shape of a workpiece groove, the flux leakage controller coupled with the workpiece groove is made, the flux leakage controller is filled in the workpiece groove, and the problems of flux leakage and magnetic line effusion in the position of the workpiece groove are solved; and the induction heating efficiency is improved, and simultaneously the phenomena of distortion and hardening break are reduced.

The invention relates to a manufacture method for manufacturing a cantilever steel pipe with high strength and high toughness by using a hot-rolling coiled plate. The method comprises the following steps that: firstly, a hot-rolling coiled plate is rolled into an ERW welding pipe by using an ERW pipe welding machine set, the ERW welding pipe is heated by induction in induction heating equipment, the heating time is within 60-140s, the ERW welding pipe is heated to 910DEG C to 960DEG C, and austenitizing is carried out; then, the ERW welding pipe enters a water-cooling or steam-cooling quenching machine set to carry out quenching, the quenching and cooling speed of the ERW welding pipe is greater than or equal to 5DEG C / s, and a quenched martensite organization is obtained after quenching;tempering is carried out after quenching, induction heating is carried out by adopting the induction heating equipment in the tempering, the heating temperature of the quenched martensite organization is 220DEG C to 440DEG C, the tempering time is 80 to 180s, and a tempered martensite organization is obtained; and finally, straightening, flaw detection, surface inspection and sampling inspection are carried out to finally obtain the cantilever steel pipe with excellent performance, high strength and high toughness. The invention has the advantages that the invention adopts a heat treatment method of induction heating to cause the heated cantilever steel pipe to be evenly heated, decomposes the residual austenite when obtaining the tempered martensite after induction tempering and has low equipment investment, little maintenance cost of the equipment, small occupation area and small environmental pollution.

The invention discloses a light intermediate frequency heating power supply based on high-frequency rectification and inverter and a design method thereof. Through the high-frequency IGBT rectification and inverter circuit, and using soft switching technology, the three-phase power frequency AC voltage signal is converted into a high frequency of 20KHz. Square wave voltage output; on the output side of the IGBT rectifier inverter circuit, an external high-frequency step-up transformer is connected, in which the primary winding of the high-frequency step-up transformer is an inductive load, and a capacitor is connected in series to make the output circuit of the secondary winding of the transformer resonate at 20KHz; as a high-frequency AC The power supply, through a group of IGBT switch modules, realizes medium-frequency chopping of the input high-frequency high voltage. 1KHz series resonance occurs in the capacitor, at this time, the intermediate frequency sinusoidal AC current flows through the load to meet the demand of the load heating current. The invention not only greatly reduces manufacturing and application costs, but also uses simple modules and is easy to implement.

The invention discloses an induction heating and microwave heating multifunctional hot milling construction method for asphalt pavement. It includes the following steps: judge the pavement material; determine the heating method; according to the size and position of the area to be milled, the mechanical arm controls the heating mechanism to move, arrange and combine, and correspond to the heating position; start the power supply, start heating, start the water pump, and adjust the heating device. To cool down, the heating car moves slowly at a certain speed; milling is carried out on the heated parts. The invention can solve the problems of poor milling effect caused by poor heating effect of different road surfaces and inapplicability of the traditional milling method of asphalt on the steel bridge deck.