44results about How to "Increase heat treatment temperature" patented technology

The invention provides a method for coating metal magnetic powder on soft magnetic ferrites. According to the method, the metal magnetic powder is mixed with trace micron or submicron soft magnetic ferrites, and then, a coating layer is formed through microwave high-temperature heat treatment. The invention also discloses a method for preparing the metal soft magnetic composite materials by adopting the coating powder. According to the method, the coating powder is subjected to organic matter coating, lubricating agents are added, pressing and forming are carried out, finally, annealing treatment is carried out, and the soft magnetic composite materials are obtained. The method has the advantages that the characteristics of magnetism, high electrical resistivity and high-temperature resistance of ferrite soft magnetic materials are sufficiently used, the two kinds of soft magnetic materials are compounded, non-magnetic substances are less than other kinds of soft magnetic composite materials, and in addition, a higher heat treatment temperature is realized, so that better magnetic performance is realized. The soft magnetic composite materials prepared by adopting the method provided by the invention have higher magnetic conductivity and low loss, the frequency stability is good, the magnetic loss at high frequency is low, in addition, the preparing process is simple, the environment is protected, the operation is easy, the cost is low, and the method is suitable for industrial mass and large-scale production.

The invention belongs to the field of preparation of metallic soft magnetic materials, and particularly relates to a preparation method for a mu75 magnetic powder core of soft magnetic ferrosilicon aluminum, which includes steps of smelting, rough smashing, heat treatment, fine smashing, annealing treatment, powder grading, powder insulating, compression molding, secondary heat treatment and coating treatment and requires components, by weight, 9.10% of silicon, 5.95% of aluminum and the rest iron. The preparation is performed with the smelting temperature of 1600 DGE C, the compression molding pressure ranging from 1700MPa to 2000Mpa, magnetic powder core pressing temperature ranging from 600 DEG C to 800 DEG C, and one hour for warm keeping in a nitrogen-oxygen mixed atmosphere. The magnetic powder core mu=75+-6 at 100kHz, the magnetic conductivity mu is smaller than 1% in variation under 1000kHz, the magnetic powder core loss is accordant to Pcv (powder loss) 50kHZ / 50mT<=100Mw / cm3, and the direct-current bias magnetic field is not lower than 70Oe when the magnetic conductivity is reduced to 50%. The preparation method for the mu75 magnetic powder core of soft magnetic ferrosilicon aluminum has the advantages that added binder is solid organic binder, the heat treatment after molding includes keeping warm for one hour in the nitrogen-oxygen mixed atmosphere, and the prepared magnetic powder core is free of pulverization, high in strength and stable in performance and has fine direct current bias characteristics, frequency stability and low loss.

The invention relates to a method for manufacturing mu 125 sendust cores. The method comprises the steps of alloy smelting, coarse crushing, heat treatment, fine crushing, annealing treatment, powder classification, powder insulation, compression moulding, secondary heat treatment and coating treatment. The mu 125 sendust cores comprise the following compositions: 9.10 percent of silicon, 5.95 percent of aluminum and the balance of iron; the sendust cores are smelted at 1,600DEG C, molded under the pressure of between 1,950 and 2,150MPa, subjected to heat treatment at the temperature of between 600 and 800DEG C, kept at the temperature for 30min, and subjected to heat treatment under the protection of nitrogen. The magnetic permeability mu of the sendust cores is equal to 125+ / -10 (10kHz / 1mT); the mu change rate in 1 MHz is less than 5%; Pcv is less than or equal to 190 mW / cm<3> (100kHz / 50mT); and the applied direct current bias field H is not less than 390e when the mu is 50%. A passivating solution does not contain chromium ions, which is environment-friendly; and an insulation layer between powder of the sendust cores has a glass phase structure containing P, which has high temperature for heat treatment and contributes to eliminating internal stress and reducing iron loss. A solid inorganic binder is adopted, so the adhesive strength is high, the performance is stable, and the process is simplified.

The invention relates to the technical field of glass processing, and especially relates to a glass container fire polishing machine, which solves technical problems in prior arts such as unreasonable design. The fire polishing machine comprises a frame, and a glass container conveyer belt arranged above the frame. The fire polishing machine is characterized in that: plural sets of fire polishing mechanism are arranged on the frame, wherein the fire polishing mechanisms are orderly arranged along the conveyer belt; each fire polishing mechanism is connected to the frame through an adjustable movable mechanism; the fire polishing mechanisms can move along the conveyer belt with the driving of the adjustable movable mechanism; while moving along the conveyer belt, the fire polishing mechanisms can be elevated in a vertical direction with the adjustable movable mechanism. Compared to prior arts, the glass container fire polishing machine has advantages of reasonable design, simple structure, high heat treatment temperature, and high speed. Meanwhile, flaws appeared during glass bottle production processes can also be solved by the machine. The processed glass containers have good surface fineness, no dust, and basically no pollution.

The invention discloses a preparation method of near ultraviolet-excited high silica blue-light-emitting glass. The preparation method comprises the steps of: firstly melting borosilicate glass, carrying out acid leaching to obtain large-aperture and intact porous glass after carrying out thermal treatment on split-phase at a higher temperature; dipping the porous glass into solution containing europium ion to soak and dope, and sintering at the high temperature in a reducing atmosphere to obtain the compact high silica blue-light-emitting glass. The glass disclosed by the invention greatly improves the doping concentration of the europium ion under the precondition of keeping the luminous intensity of the near ultraviolet-excited high silica blue light emitting, and facilitates laser excitation. The optimal excitation wavelength of the glass disclosed by the invention is expanded to a range of 350-390nm, so a high-pressure mercury lamp which is relatively safe to a human body and mature in the development and an LED (light-emitting diode) can be utilized as excitation light sources by the improvement, and the safety and convenience in application are improved. Therefore, the preparation method can be applied to the industries such as illumination and decoration and life purposes, and is expected to be a new laser material.

The invention discloses a manufacturing method for a silicon-containing stainless steel seamless tube. The method comprises the following procedures: heating of a tube blank; perforating; cold rolling; heat treatment; straightening; and pickling. In the procedure of heat treatment, a short-time high-temperature heat treatment process is employed, heat treatment temperature is 1090 to 1110 DEG C, a heat preservation coefficient is 0.8 to 1.5 min / mm, and heat preservation time is determined according to steel tube thickness and is calculated by multiplying the heat preservation coefficient with the steel tube thickness; and in the procedure of straightening, a forward-backward bidirectional straightening method is employed, backward straightening is carried out after original unidirectional straightening, so the effect of integral fragmentation of a surface oxide skin is realized. According to the invention, the short-time high-temperature heat treatment process is employed, so the surface oxide skin becomes thinner and loose after heat treatment, which facilitates easy removal of the oxide skin during pickling; the forward-backward bidirectional straightening method is employed for integral fragmentation of the surface oxide skin, so the oxide skin left in pickling is eliminated, a better fragmentation effect is exerted on the loose oxide skin, and product surface quality after pickling is further guaranteed.

The invention discloses a preparation method of a sendust magnetic core and an inorganic composite insulating coating material for the magnetic core, which belongs to the field of sendust magnetic materials and is used to solve the problem of the high eddy current loss of the existing magnetic core and the use of organic coatings in the magnetic core. The problems caused by the cladding material are that the stress is difficult to eliminate during the molding process, the insulation performance of the material is poor, and the organic matter volatilizes a lot during the heating process such as heat treatment. The preparation method of the sendust magnetic core described in the present invention includes the steps of ingot smelting, powder making, surface phosphating treatment, insulation coating, press molding, annealing treatment and surface coating, and the prepared sendust magnetic core Low eddy current loss, small temperature coefficient of magnetic permeability, good temperature stability, high DC superposition characteristics, high saturation magnetic induction, good high frequency characteristics, suitable for high frequency, miniaturization, high power and anti-electromagnetic interference requirements of electronic devices .

The invention discloses a new method for preparing magnetically sensitive materials with high sensitivity and wide linear area. Compared with the existing technology, the technology of the present invention can be used to prepare magnetically sensitive materials with the advantages of wide linear area and high sensitivity at the same time. It has the advantages of simple process and easy control. There are few process parameters that need to be controlled, and it has the advantages of easy control of material properties and energy saving. There is no need to increase the processing temperature or increase the heat treatment time. Therefore, the present invention has significant energy saving advantages. Since the process is simple and easy to control, it requires The production equipment is simple, the cost is low, and it is easy to ensure the consistency of batch products. Therefore, it has the advantages of easy promotion and industrial transformation.