Quick manufacture method and device for metal part under action of magnetic field.

A technology of metal parts and manufacturing methods, applied in the field of direct and rapid manufacturing of metal parts under the action of a magnetic field, can solve the problems of uneven composition of metal powder materials, obvious grain orientation, etc.

Inactive Publication Date: 2013-03-06
HUAZHONG UNIV OF SCI & TECH
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  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problems of uneven material composition, obvious grain orientation, and easy to produce pores and cracks in the manufacturing process of the metal powder that are troubled by the rapid melting of the background technology, the present invention provides a rapid manufacturing method for metal parts under the action of a magnetic field. Method and device, in order to minimize the occurrence of defects and improve the performance of parts

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  • Quick manufacture method and device for metal part under action of magnetic field.
  • Quick manufacture method and device for metal part under action of magnetic field.
  • Quick manufacture method and device for metal part under action of magnetic field.

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Embodiment Construction

[0031] The present invention applies electromagnetic force outside the molten pool to change the force condition of the molten pool during the interaction between the high-energy beam and the metal powder. defects in the part, thereby improving the performance of the part.

[0032] The characteristics of the electromagnetic field attached to the outside of the molten pool are: the magnitude and direction of the current can be controlled, and the strength, direction and frequency of the magnetic field can be adjusted according to requirements; the current range in the test is continuously adjustable from 0-400A, and the frequency of the magnetic field can be less than The low-frequency magnetic field of 20KHz may also be a high-frequency magnetic field with a frequency greater than 20KHz. When we want to get as many columnar crystals as possible, we can use lower current and frequency, and if we want to get more equiaxed crystals, we can use high current and high frequency.

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Abstract

The invention relates to a quick manufacture method and device for a metal part by a high-energy beam under the action of magnetic field. In the process that the high-energy beam and metal powder act, the metal powder is molten; the electromagnetic force action is applied to the outer part of a molten pool to change the stressed situation of the molten pool; the solidification behavior of the metal molten pool is subjected to directional control; the inner tissue of a metal manufacture part is refined; and the performance of the metal manufacture part is improved. The device comprises a first electrode, a second electrode and a solenoid coil, wherein the first electrode and the second electrode are installed on a workbench; and when the solenoid coil works, the electromagnetic force can be still kept to be enough to act on the molten pool generated by high-energy beam radiation metal powder. According to the invention, the solenoid coil is electrified by the electrodes to generate a magnetic field; and when the high-energy beam acts on the metal powder, the stressed situation of the metal molten pool generated by the metal powder is affected by the electromagnetic force, the magnitude and the direction of the electromagnetic acting force are controlled via the change of the current and the voltage so as to control the stressed behavior of the metal molten pool.

Description

technical field [0001] The technology of the invention belongs to the field of manufacturing, and in particular relates to a method and device for direct and rapid manufacturing of metal parts under the action of a magnetic field. The invention uses magnetic force to change the force and metallurgical behavior of the molten pool in the process of high-energy beam melting metal powder, and then regulates the internal microstructure of the formed metal parts, and finally achieves the purpose of optimizing the macroscopic performance of the metal parts. Background technique [0002] High energy beams mainly include laser beams, electron beams and ion beams. High-energy beam melting metal powder manufacturing technology is an advanced manufacturing technology developed in recent years that can realize rapid manufacturing of nearly fully dense metal parts. Compared with traditional rapid prototyping technology, this technology not only has the advantages of no need for special t...

Claims

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Application Information

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IPC IPC(8): B22F3/105
CPCY02P10/25
Inventor 魏青松李帅张升赵晓邹志祎
Owner HUAZHONG UNIV OF SCI & TECH
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