Ultrasonic vibration-electromagnetic stirring composite energy field assisted laser cladding method and device
A technology of electromagnetic stirring and composite energy field, applied in metal material coating process, coating and other directions, can solve the problems of single function and unsatisfactory effect, and achieve the effect of flexible regulation, strong engineering application value and fine grain size.
Active Publication Date: 2018-06-15
JIANGSU UNIV
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Problems solved by technology
[0006] The purpose of the present invention is to solve the problem that the existing laser cladding auxiliary technology has single function and unsatisfactory effect, and invents a method that combines ultrasonic vibration and electromagnetic stirring composite energy field to assist laser cladding, and at the same time provides a corresponding The device, which effectively regulates the microstructure of the cladding layer through the synergistic effect of ultrasonic vibration and electromagnetic stirring, thereby improving the defects of the cladding layer and improving the comprehensive performance of the cladding layer
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Embodiment 2
[0040] A kind of ultrasonic vibration-electromagnetic stirring composite energy field assisted laser cladding method, it comprises the following steps:
[0041] (1) Use the preset method to pre-spread the required powder on the cladding substrate by means of binder or powder tableting, and place it in a vacuum drying oven to dry;
[0042] (2) Connect the dried cladding matrix with pre-set powder to the ultrasonic vibration device through a threaded rod, and place it horizontally at the center of the coaxial lines of the two excitation coils;
[0043] (3) Adjust the frequency and power of the ultrasonic power supply so that the cladding substrate with pre-set powder produces an amplitude of 0.1-50μm and a vibration frequency of 20-80kHz. At the same time, the electronic voltage regulator is automatically adjusted to make the current in the circuit in the 3-20A is adjustable, and an alternating magnetic field of 9.7-65.7mT is generated in the cladding area;
[0044] (4) Turn on...
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Abstract
The invention relates to a method and device for assisting laser cladding through an ultrasonic vibration-magnetic stirring composite energy field. The device is characterized by mainly comprising a laser, ultrasonic vibration equipment, an AC excitation device and the like. According to the device disclosed by the invention, an ultrasonic field and an electromagnetic field are applied at the same time in the laser cladding process, so that laser melting regions are subjected to the synergistic effects of the ultrasonic vibration and the magnetic stirring, the organization form in a molten pool is adjusted and controlled, the grain size is controlled, and the macroscopic surface appearance is improved; therefore, excellent cladding layer properties are further obtained. According to the device, the defect that the ultrasonic processing range is small when only the ultrasonic field is applied is overcome, and the shortcoming that the structure refinement effect is unapparent when only the electromagnetic field is applied is overcome. According to the method and device disclosed by the invention, adjusting and controlling of the structure properties of laser cladding layers through the ultrasonic vibration-magnetic stirring composite energy field are realized, cladding layers which are free from cracks and holes, have structure refinement and excellent properties can be obtained. The method and device have the characteristics of being simple in structure, convenient to operate, low in cost, broad in application scope and the like.
Description
technical field [0001] The present invention relates to laser cladding technology, especially a method and device for laser cladding treatment on the surface of materials by using laser cladding technology, specifically a laser cladding assisted laser cladding by using ultrasonic vibration and electromagnetic stirring composite energy field Methods and Apparatus. Background technique [0002] Laser cladding technology is widely used in aerospace, chemical industry, mold, machinery, steel and other industries due to its controllable heat source and rapid solidification, as well as its high bonding strength and fine structure. However, there are still some problems in the laser cladding process. The main problems include defects such as pores, cracks, and coarse columnar grains in the cladding layer, as well as large residual stress due to rapid heating and quenching during the laser cladding process. At present, the solutions to these defects mainly include reducing these pr...
Claims
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IPC IPC(8): C23C24/10
CPCC23C24/10
Inventor 周建忠徐家乐黄舒崔承云孟宪凯冯旭薛远丁浩
Owner JIANGSU UNIV