DETERMINING THE INFLUENCE OF THE TECHNOLOGICAL MODE VARIABLES ON THE FORMATION OF THE DEPOSITED LAYER DURING LASER CLADDING ON A THIN-WALLED BASE
DOI:
https://doi.org/10.35546/kntu2078-4481.2024.3.16Keywords:
laser cladding, thin-walled base, high-alloy steel, technological modes.Abstract
Thin-walled parts are widely used in the aircraft industry, engine building, and other industries. Such parts often require the manufacture of additional structural elements that can be produced using many technologies, including laser cladding. When using the cladding technology to build structural elements on a thin-walled base, the parts are constantly subjected to cyclic heat treatment. Changes in the temperature gradient over a long period of time contribute to the possible formation of additional internal tension, which can lead to formation of cracks and deformations in thin-walled parts. In addition, under the influence of various factors affecting the part during its final machining, thin-walled parts can be deformed, which can reduce production accuracy and may also lead to the formation of additional stresses in the material. Currently, the main problems that are relevant in the study of this technological process are the analysis of the effect of machining parameters as well as a rapid alternating temperature cycle on the microstructure and geometric characteristics of the deposited material tracks, along with the control of thermal and residual stress accumulation. The purpose of this study is to determine the influence of the laser radiation working mode variables on the geometric parameters of deposited three-dimensional elements on thin-walled parts of critical structures. After conducting a series of experimental works and analyzing their results, certain dependencies of the influence of the characteristics of the laser technological complex operating modes on the formation and geometric characteristics of the deposited layer during laser surfacing on a thin-walled base were determined, and the optimal characteristics for the operating mode were obtained. This operating mode was used for further work on the development of technical recommendations for laser surfacing on a thin-walled base.
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