Electromagnetic field pressurization solidification method and device for laser forming
A laser forming and electromagnetic field technology, applied in the field of alloys, can solve problems such as the generation of Lorentz force, and achieve the effect of promoting solidification structure and promoting feeding
Pending Publication Date: 2022-07-29
SHANGHAI JIAO TONG UNIV +1
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Problems solved by technology
However, the invention still has the following problems: only the alternating magnetic field is applied on the surface of the molten pool, and then the alternating magnetic field is used to generate an induced current in the molten pool, thereby generating Lorentz force
However, the invention still has the following problems: when laser cladding is carried out on an inclined
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[0030] The present invention will be described in detail below with reference to specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention. In the description of the embodiments of the present invention, it should be noted that the terms "first" and "second" in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It is to be understood that the data so used may be interchanged under appropriate circumstances such that the embodiments of the invention described herein can be practiced in s...
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The invention provides an electromagnetic field pressurization solidification method and device for laser forming, and the method comprises the steps: arranging two magnets in the length direction of a to-be-processed metal sample, and clamping the to-be-processed metal sample between the two magnets; the to-be-machined metal sample is communicated with the wire, so that current flows in the length direction of the to-be-machined metal sample; a to-be-machined metal sample is molten into molten metal through laser, and a molten pool is formed; in the molten pool solidification process, current and a magnetic field are applied to a metal sample to be machined at the same time, the direction of the magnetic field is controlled to be perpendicular to the current direction, vertically-downward Lorentz force is formed on the surface of molten metal to act on the molten metal, pressure is applied to the molten pool, and a compact part is formed. Pressure is applied to a molten pool formed by laser through the electromagnetic effect, molten metal is solidified under the pressure effect, and a compact solidification structure is promoted to be formed in the molten pool.
Description
technical field [0001] The invention relates to the technical field of alloys, and in particular, to a method and device for electromagnetic field pressure solidification for laser forming. Background technique [0002] In the melting and forming process of metal using laser (including powder bed laser melting technology, laser surface cladding technology, laser welding, laser surface modification technology), due to keyholes, dissolved gas precipitation, entrainment, etc. Pores are easy to exist, which will deteriorate the mechanical properties and corrosion resistance of the material and reduce its service life. These pores are difficult to eliminate in the micro molten pool. [0003] Pressure solidification is an effective means to eliminate porosity and shrinkage in the field of casting. By applying pressure to the molten metal, the molten metal can be filled into defects such as pores, and the pores can be compressed; the purpose of eliminating pore defects in the cas...
Claims
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Login to View More IPC IPC(8): C22F3/02C21D10/00
CPCC22F3/02C21D10/00
Inventor 何林董安平杜大帆熊良华孙宝德李建平刘朝明桂大兴
Owner SHANGHAI JIAO TONG UNIV