A kind of preparation method of high-purity electromagnetic pure iron

Abstract

The invention discloses a method for preparing high-purity electromagnetic pure iron, which belongs to the technical field of pure iron preparation. It includes the steps of vacuum induction smelting, vacuum self-consumption remelting, billet rolling, and aging treatment; the present invention selects industrial pure iron with a purity higher than 99% as a raw material, and adopts the "double vacuum smelting" method in the production process, The ability of vacuum induction furnace melting to remove gases, non-metal assimilates and harmful elements has been fully demonstrated. At the same time, through vacuum self-consumption remelting and secondary purification, electromagnetic purity with high purity, good density, and average chemical composition and microstructure can be obtained. Iron; through vacuum magnetron sputtering and glow nitriding treatment on rolled profiles, the surface hardness, wear resistance and high temperature resistance of electromagnetic pure iron can be effectively improved.

Description

technical field [0001] The invention belongs to the technical field of pure iron preparation, and in particular relates to a preparation method of high-purity electromagnetic pure iron. Background technique [0002] X-ray tubes are widely used in X-ray imaging technology. There are two types of common X-ray tubes on the market, one is a fixed anode tube, and the other is a rotating anode tube with increased heat capacity. The rotating anode X-ray tube is a high-vacuum electric vacuum device. Its working principle is that the rotor is fixed on the bearing seat at one end of the vacuum glass tube, and the outer stator of the vacuum glass tube can drive it to rotate. The filament is fixed on the Set on the cathode at the other end of the vacuum glass tube, respectively apply negative piezoelectricity to the filament and positive piezoelectricity to the anode, and the electrons emitted by the filament hit the anode to generate X-rays. [0003] At present, the rotating speed of ...

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Problems solved by technology

[0003] At present, the rotating speed of the rotating anode tube rotor is above 3000 rpm, the high-speed rotating anode tube can reach 7200 rpm, and the ultra-high-speed tube can reach above 10,000 rpm. The tube anode rotor speed is It is designed according to the current density of the focal point of the tube. For the tube with the same current, the smaller the focal point, the higher the speed of the rotating anode rotor of the tube. If the rotor speed is abnormal, when the tube is ignited, its output kV and mA The accuracy of the tube will be lower, which will reduce the imaging quality, thereby affecting the medical staff's judgment on the condition. It can be seen that it is important to ensure good heat dissipation of the tube

[0004] Since the rotor is difficult to withstand the high temperature generated by the rotation when it is rotating, it is easy to burn out and affect the normal use of the rotating anode X-ray tube. Therefore, the rotor with high temperature resistance can prevent its temperature from being too high and burning If the rotor is used for a long time, it will wear and tear, which will increase the air gap between the rotor and the stator, which will increase the eddy current and increase the operating current to a certain extent, and the purity of the material used to prepare the rotor parts will also affect the performance of the rotor. The existing rotors are still lacking in high purity, high temperature resistance and wear resistance, and need to be improved

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